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Sample records for bloqueo infraorbitario intraoral

  1. Analgesia postoperatoria en la queiloplastia del lactante. Estudio comparativo: bloqueo infraorbitario intraoral bilateral con bupivacaína 0,25% con adrenalina vs. analgesia intravenosa con tramadol

    Directory of Open Access Journals (Sweden)

    J. A. Delgado

    2005-05-01

    Full Text Available Objetivo: Comparar la eficacia y duración del bloqueo del nervio infraorbitario intraoral bilateral frente a la analgesia intravenosa convencional con tramadol en el control del dolor postoperatorio en lactantes sometidos a queiloplastia por labio leporino. Material y métodos: Tras la realización de una adecuada valoración preanestésica y la obtención del consentimiento informado de los padres, realizamos un estudio prospectivo, controlado aleatorizado y doble ciego en 25 niños, ASA I, con edades comprendidas entre los 3-10 meses, tras obtener el consentimiento informado de los padres, propuestos para cirugía correctora de labio leporino (queiloplastia. Todos ellos fueron premeditados, media hora antes de la intervención quirúrgica, con midazolan oral (0,5 mg.kg-1 y, en todos los casos, se practicó la técnica anestésica y el bloqueo nervioso por el mismo anestesiólogo, que consistió en una inducción inhalatoria con sevoflurano previa a la venoclisis. La anestesia general se completó con atropina, fentanilo y rocuronio a las dosis establecidas que se administraron, por vía intravenosa, previamente a la intubación endotraqueal y la ventilación mecánica. Los pacientes fueron divididos aleatoriamente en dos grupos: Grupo A (n = 12: se administró 1-2 ml de bupivacaína al 0,25% con adrenalina para el bloqueo infraorbitario bilateral y solución salina intravenosa como sustitutivo de la analgesia intravenosa con tramadol. Grupo B (n = 13: se administró solución salina para el bloqueo nervioso, en lugar de la bupivacaína, y tramadol intravenoso (1,5 mg.kg-1 como analgesia postoperatoria. En todos ellos se realizó anestesia general con sevoflurano y fentanilo "a demanda" según parámetros convencionales (tensión arterial, frecuencia cardiaca, tamaño pupilar, etc.. Durante sus primeras seis horas de estancia en Reanimación se valoró la duración de la analgesia, grado de disconfort e intensidad dolorosa. Además se anot

  2. Analgesia postoperatoria en la queiloplastia del lactante. Estudio comparativo: bloqueo infraorbitario intraoral bilateral con bupivacaína 0,25% con adrenalina vs. analgesia intravenosa con tramadol Postoperative analgesia for the management of chieloplasty in the breast-fed baby. Comparative study: bilateral intraoral blockade of the infraorbitary nerve with bupivacaine 0.25% plus adrenaline versus intravenous analgesia with tramadol

    Directory of Open Access Journals (Sweden)

    J. A. Delgado

    2005-05-01

    Full Text Available Objetivo: Comparar la eficacia y duración del bloqueo del nervio infraorbitario intraoral bilateral frente a la analgesia intravenosa convencional con tramadol en el control del dolor postoperatorio en lactantes sometidos a queiloplastia por labio leporino. Material y métodos: Tras la realización de una adecuada valoración preanestésica y la obtención del consentimiento informado de los padres, realizamos un estudio prospectivo, controlado aleatorizado y doble ciego en 25 niños, ASA I, con edades comprendidas entre los 3-10 meses, tras obtener el consentimiento informado de los padres, propuestos para cirugía correctora de labio leporino (queiloplastia. Todos ellos fueron premeditados, media hora antes de la intervención quirúrgica, con midazolan oral (0,5 mg.kg-1 y, en todos los casos, se practicó la técnica anestésica y el bloqueo nervioso por el mismo anestesiólogo, que consistió en una inducción inhalatoria con sevoflurano previa a la venoclisis. La anestesia general se completó con atropina, fentanilo y rocuronio a las dosis establecidas que se administraron, por vía intravenosa, previamente a la intubación endotraqueal y la ventilación mecánica. Los pacientes fueron divididos aleatoriamente en dos grupos: Grupo A (n = 12: se administró 1-2 ml de bupivacaína al 0,25% con adrenalina para el bloqueo infraorbitario bilateral y solución salina intravenosa como sustitutivo de la analgesia intravenosa con tramadol. Grupo B (n = 13: se administró solución salina para el bloqueo nervioso, en lugar de la bupivacaína, y tramadol intravenoso (1,5 mg.kg-1 como analgesia postoperatoria. En todos ellos se realizó anestesia general con sevoflurano y fentanilo "a demanda" según parámetros convencionales (tensión arterial, frecuencia cardiaca, tamaño pupilar, etc.. Durante sus primeras seis horas de estancia en Reanimación se valoró la duración de la analgesia, grado de disconfort e intensidad dolorosa. Además se anot

  3. Intraoral giant condyloma acuminatum

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    Gupta R

    2001-09-01

    Full Text Available A case of intraoral giant condyloma acuminatum is reported in a 50- year- old Indian. He did not respond to topical application of podophyllin 20% but responded partially to electric cauterisation. Surgical excision was done to get rid of the warty growh completely. Since there were no skin or genital lesions and no history of marital or extramarital sexual contact the lesion was probably acquired from environmental sources. Nonsexual transmission should be considered especially when the lesions are extragenital.

  4. Intraoral transmental suction lipectomy.

    Science.gov (United States)

    Mommaerts, M Y; Abeloos, J V S; De Clerq, C A S; Neyt, L F

    2002-08-01

    Intraoral transmental suction lipectomy (TMSL) is performed by entering the suction canula through the chin osteotomy/ostectomy gap into the sub- and/or supraplatysmal fat tissue layers. The aim of the study was to know patients' and operators' satisfaction with the procedure, and to know the kind and frequency of the complications. Twenty patients were consecutively treated and reviewed after a minimum of 5 years. All were satisfied with the overall results. It proved difficult to differentiate between the results of the liposuction and those of the genioplasty and/or orthognathic profile correction. From a surgeon's point of view, 11 showed excellent, nine good and one moderate results. Complications included one local subcutaneous infection, four transient neurosensory disturbances at the lower lip and two marginal branch weaknesses. All complications were resolved by the time of the long-term follow-up appointment. TMSL offers the psychological advantage of being performed without skin incision. Cosmetic results and complications are similar to those obtained with the transcutaneous liposuction techniques. PMID:12361067

  5. Intraoral myxoid nerve sheath tumour

    NARCIS (Netherlands)

    Schortinghuis, J; Hille, JJ; Singh, S

    2001-01-01

    A case of an intraoral myxoid nerve sheath tumour of the dorsum of the tongue in a 73-year-old Caucasian male is reported. This case describes the oldest patient with this pathology to date. Immunoperoxidase staining for neuronspecific enolase (NSE) and epithelial membrane antigen (EMA) expression d

  6. Intraoral Digital Impression Technique: A Review.

    Science.gov (United States)

    Ting-Shu, Su; Jian, Sun

    2015-06-01

    With the techniques of computer-aided design and computer-aided manufacturing (CAD/CAM) being applied in the field of prosthodontics, a concept of intraoral digital impressions was put forward in the early 1980s. It has drawn comprehensive attention from dentists and has been used for dental prosthesis fabrication in a number of cases. This new digital impression technique is expected to bring about absolute digitization to the mode of prosthodontics. A few published articles have indicated that dental prostheses fabricated from intraoral digital impressions have exhibited remarkable advantages over those from conventional impressions in several respects. The present review discusses intraoral digital impression techniques in terms of the following aspects: (1) categories and principles of intraoral digital impression devices currently available; (2) operating characteristics of the devices; and (3) comparison of the manipulation, accuracy, and repeatability between intraoral digital impression and conventional impression. PMID:25220390

  7. The CT appearance of intraoral chewing gum

    Energy Technology Data Exchange (ETDEWEB)

    Towbin, Alexander J. [Cincinnati Children' s Hospital Medical Center, Department of Radiology, Cincinnati, OH (United States)

    2008-12-15

    When imaged, intraoral chewing gum has the potential to be misdiagnosed. Chewing gum has a characteristic appearance on CT: it is ovoid in shape, hyperdense, and has small internal locules of air. Reports have described the appearance of gum on radiographs and abdominal CT images; however, no reports could be found detailing its appearance within the mouth. This report describes the appearance of intraoral chewing gum as well as the properties of the gum that lead to this appearance. Because of the potential for misdiagnosis, screening for intraoral foreign bodies should be considered prior to imaging. (orig.)

  8. Intraoral radiation carrier for edentulous patients

    International Nuclear Information System (INIS)

    The principles of fabricating an intraoral radioactive carrier have been described to treat malignant diseases of the oral cavity. The prosthesis provides consistent direction and fixation of the radioactive source into the same location

  9. Intraoral radiation carrier for edentulous patients

    Energy Technology Data Exchange (ETDEWEB)

    Sela, M.; Taicher, S.

    1983-12-01

    The principles of fabricating an intraoral radioactive carrier have been described to treat malignant diseases of the oral cavity. The prosthesis provides consistent direction and fixation of the radioactive source into the same location.

  10. Intraoral Pressure in Ethnic Wind Instruments

    CERN Document Server

    Goss, Clinton F

    2013-01-01

    High intraoral pressure generated when playing some wind instruments has been linked to a variety of health issues. Prior research has focused on Western classical instruments, but no work has been published on ethnic wind instruments. This study measured intraoral pressure when playing six classes of ethnic wind instruments (N = 149): Native American flutes (n = 71) and smaller samples of ethnic duct flutes, reed instruments, reedpipes, overtone whistles, and overtone flutes. Results are presented in the context of a survey of prior studies, providing a composite view of the intraoral pressure requirements of a broad range of wind instruments. Mean intraoral pressure was 8.37 mBar across all ethnic wind instruments and 5.21 +/- 2.16 mBar for Native American flutes. The range of pressure in Native American flutes closely matches pressure reported in other studies for normal speech, and the maximum intraoral pressure, 20.55 mBar, is below the highest subglottal pressure reported in other studies during singing...

  11. Evaluation of the Beam Quality of Intraoral X-ray Equipment using Intraoral Standard Films

    International Nuclear Information System (INIS)

    This study was to evaluate the beam quality of intraoral X-ray equipment used at Yonsei University Dental Hospital (YUDH) using the half value layer (HVL) and the characteristic curve of intraoral standard X-ray film. The study was done using the intraoral X-ray equipment used at each clinical department at YUDH. Aluminum filter was used to determine the HVL. Intraoral standard film was used to get the characteristic curve of each intraoral X-ray equipment. Most of the HVLs of intraoral X-ray equipment were higher than the least recommended thickness, but the REX 601 model used at the operative dentistry department and the X-707 model used at the pediatric dentistry department had HVLs lower than the recommended thickness. The slopes of the characteristic curves of films taken using the PANPAS 601 model and REX 601 model at operative dentistry department, the X-70S model of prosthodontic dentistry department, and the REX 601 model at the student clinic were relatively low. HVL and the characteristic curve of X-ray film can be used to evaluate the beam quality of intraoral X-ray equipment. In order to get the best X-ray films with the least radiation exposure to patients and best diagnostic information in clinical dentistry, X-ray equipment should be managed in the planned and organized fashion.

  12. 21 CFR 872.4130 - Intraoral dental drill.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  13. 21 CFR 872.6890 - Intraoral dental wax.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  14. Esclerosis sistémica complicada con síncope y bloqueo AV completo

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    Francisco Femenía

    2010-10-01

    Full Text Available La esclerosis sistémica es una compleja enfermedad que afecta el tejido conectivo, el sistema vascular y el sistema inmunológico, y se caracteriza por fibrosis cutánea y de órganos viscerales. Los bloqueos de rama y los hemibloqueos se presentan en el 25 a 75% de los casos y constituyen predictores independientes de mortalidad. Los bloqueos auriculoventriculares de segundo o tercer grado son muy raros. Presentamos el caso de una mujer de 47 años de edad, con diagnóstico de esclerosis sistémica, quien presenta episodio sincopal secundario a bloqueo auriculoventricular completo con necesidad de implante de marcapasos definitivo.

  15. Cyanoacrylate for Intraoral Wound Closure: A Possibility?

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    Parimala Sagar

    2015-01-01

    Full Text Available Wound closure is a part of any surgical procedure and the objective of laceration repair or incision closure is to approximate the edges of a wound so that natural healing process may occur. Over the years new biomaterials have been discovered as an alternate to conventional suture materials. Cyanoacrylate bioadhesives are one among them. They carry the advantages of rapid application, patient comfort, resistance to infection, hemostatic properties, and no suture removal anxiety. Hence this study was undertaken to study the effect of long chain cyanoacrylate as an adhesive for intraoral wound closure and also to explore its hemostatic and antibacterial effects. Isoamyl-2-cyanoacrylate (AMCRYLATE was used as the adhesive in the study. In conclusion isoamyl cyanoacrylate can be used for intraoral wound closure, as an alternative to sutures for gluing the mucoperiosteum to bone, for example, after impaction removal, periapical surgeries, and cleft repair. Its hemostatic and antibacterial activity has to be further evaluated.

  16. Intraoral excision of large submental dermoid

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    Ankur Bhatnagar

    2013-01-01

    Full Text Available Sublingual dermoids are the rarest forms of craniofacial dermoids mostly seen in young individuals. Excision of large and deep submental dermoid is generally done via extraoral approach scarring the most prominent part of the face, which can lead to post operative scar hypertrophy and hyperpigmentation especially in non-Caucasian races. Presence of such scars leads to adverse psychological effects in young individuals. Excision via intraoral route, although technically demanding, can be simplified using basic principles of plastic surgery leading to optimal aesthetic outcome with least downtime. We excised a large sublingual dermoid extending deep to the mylohyoid muscle through intraoral approach with excellent cosmetic results. Clinicians dealing with such lesions should keep these principals in their armamentarium when dealing with this rare subset of cases.

  17. Evaluation of occupational exposure in intraoral radiography

    International Nuclear Information System (INIS)

    The intraoral radiography is widely performed in the dental office due to low cost and agility. The doses in intraoral radiology are considered low, however it is known that doses below the threshold for deterministic radiation has the potential to induce stochastic effects. An intraoral radiography has a risk of inducing fatal cancer or serious in order of 1:10,000,000. Besides the patient, the dentist may also be being exposed to radiation during the work with the radiographics practices. The bibliographies demonstrates the lack of information on radiation protection of dentists, however, the occupational dose reduction was observed in radiology over the past 14 years. This work aims to evaluate the effective dose of radiation to which workers can be exposed dentists in dental offices to perform intraoral radiographs. In this context, a study was be conducted between June 2013 and May 2014 with 44 professionals in Curitiba city. For each dentist was given a personal dosimeter to be used for 30 days. During this period, the number of radiographies and the length of the cable triggers of the X-ray equipment was registered and, the dosimeter´s dose was read. It was observed that the cables triggers meet regulatory standards and allow dentists to get the mean minimum distance of two meters from the radiation source in 93% of cases. Through analysis of the doses, it was concluded that occupational exposures of these workers are within the recommended threshold by regulatory 453/1998 of the Ministry of Health from Brazil. (author)

  18. Intraoral excision of large submental dermoid

    OpenAIRE

    Ankur Bhatnagar; Vinay Kumar Verma; Pankaj Kumar Patel

    2013-01-01

    Sublingual dermoids are the rarest forms of craniofacial dermoids mostly seen in young individuals. Excision of large and deep submental dermoid is generally done via extraoral approach scarring the most prominent part of the face, which can lead to post operative scar hypertrophy and hyperpigmentation especially in non-Caucasian races. Presence of such scars leads to adverse psychological effects in young individuals. Excision via intraoral route, although technically demanding, can be simpl...

  19. Estudio descriptivo sobre bloqueos atrio-ventriculares en infartos posteroinferiores en el Hospital de Caldas ESE

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    Wilmar Alberto Díaz

    2005-09-01

    Full Text Available Introducción: El infarto agudo de miocardio (IAM es un problema de salud pública a escala mundial y nacional, que merece una prevención, diagnóstico y tratamiento oportunos. El IAM de cara inferior presenta entre sus complicaciones el bloqueo atrio-ventricular (bloqueo AV en sus diversas manifestaciones. Materiales y métodos: El presente es un estudio de tipo descriptivo, retrospectivo realizado en el Hospital Universitario de Caldas ESE, por medio de la revisión de historias clínicas corresponismo atrio-DACCION diagnóstico, de alta calidad y de gran importancia. dientes a los años 1999 a 2002, de los pacientes que presentaron infarto agudo de miocardio de cara inferior. Se tomaron de las historias variables como edad, sexo, consumo de alcohol, tabaco, sedentarismo y la presencia o ausencia de enfermedades previas tales como hipertensión arterial, diabetes mellitus, dislipidemias e infarto agudo de miocardio previo y el tiempo de aparición del bloqueo (menor o mayor de 24 horas. Resultados: Se encontró una asociación significativa entre la incidencia de bloqueos AV con la edad (p=0.017 y el IAM previo (p=0.001 y entre mortalidad y tipo de bloqueo (p=0.028. No se presentó asociación entre los factores de riesgo asociados para IAM y la presentación de bloqueo, excepto una posible relación con la hipertensión arterial (p=0.176, no del todo clara, por lo cual se recomienda que sea explorada por estudios posteriores; 32.7% de personas con infarto de cara inferior tuvieron algún tipo de bloqueo y 77.1% de los bloqueos fueron en las primeras 24 horas. Conclusiones: Los pacientes que presenten un IAM de cara inferior con una edad >65 años, se deben someter a seguimiento con monitoría continua por electrocardiograma durante las primeras 24 horas; lo mismo todo paciente con IAM de cara inferior, se debe incluir dentro del grupo de seguimiento clínico, electrocardiográfico y de monitoreo estricto.

  20. Estudio descriptivo sobre bloqueos atrio-ventriculares en infartos posteroinferiores en el Hospital de Caldas ESE.

    Directory of Open Access Journals (Sweden)

    Wilmar Alberto Díaz

    2009-11-01

    Full Text Available Introducción: El infarto agudo de miocardio (IAM es un problema de salud pública a escala mundial y nacional, que merece una prevención, diagnóstico y tratamiento oportunos. El IAM de cara inferior presenta entre sus complicaciones el bloqueo atrio-ventricular (bloqueo AV en sus diversas manifestaciones. Materiales y métodos: El presente es un estudio de tipo descriptivo, retrospectivo realizado en el Hospital Universitario de Caldas ESE, por medio de la revisión de historias clínicas corresponismo atrio-DACCION diagnóstico, de alta calidad y de gran importancia. dientes a los años 1999 a 2002, de los pacientes que presentaron infarto agudo de miocardio de cara inferior. Se tomaron de las historias variables como edad, sexo, consumo de alcohol, tabaco, sedentarismo y la presencia o ausencia de enfermedades previas tales como hipertensión arterial, diabetes mellitus, dislipidemias e infarto agudo de miocardio previo y el tiempo de aparición del bloqueo (menor o mayor de 24 horas. Resultados: Se encontró una asociación significativa entre la incidencia de bloqueos AV con la edad (p=0.017 y el IAM previo (p=0.001 y entre mortalidad y tipo de bloqueo (p=0.028. No se presentó asociación entre los factores de riesgo asociados para IAM y la presentación de bloqueo, excepto una posible relación con la hipertensión arterial (p=0.176, no del todo clara, por lo cual se recomienda que sea explorada por estudios posteriores; 32.7% de personas con infarto de cara inferior tuvieron algún tipo de bloqueo y 77.1% de los bloqueos fueron en las primeras 24 horas. Conclusiones: Los pacientes que presenten un IAM de cara inferior con una edad >65 años, se deben someter a seguimiento con monitoría continua por electrocardiograma durante las primeras 24 horas; lo mismo todo paciente con IAM de cara inferior, se debe incluir dentro del grupo de seguimiento clínico, electrocardiográfico y de monitoreo estricto.

  1. Diagnostic reference levels in intraoral dental radiography in Korea

    OpenAIRE

    Kim, Eun-Kyung; Han, Won-Jeong; Choi, Jin-Woo; Jung, Yun-Hoa; Yoon, Suk-Ja; Lee, Jae-Seo

    2012-01-01

    Purpose The objectives of this study were to survey the radiographic exposure parameters, to measure the patient doses for intraoral dental radiography nationwide, and thus to establish the diagnostic reference levels (DRLs) in intraoral dental X-ray examination in Korea. Materials and Methods One hundred two intraoral dental radiographic machines from all regions of South Korea were selected for this study. Radiographic exposure parameters, size of hospital, type of image receptor system, in...

  2. Intraoral features and considerations in face transplantation.

    Science.gov (United States)

    Wall, A; Bueno, E; Pomahac, B; Treister, N

    2016-03-01

    Face transplantation (FT) is a unique and novel addition to the field of reconstructive surgery, which offers new hope to facially disfigured individuals. This review provides an overview of FT, including clinical indications, immunological principles, and functional outcomes, as well as an in-depth characterization of the intraoral hard and soft tissue findings in the six patients transplanted to date at Brigham and Women's Hospital in Boston, MA, USA. Six FT recipients underwent comprehensive clinical and radiographic evaluation to assess their intraoral status, function, and overall health. The extra- and intraoral soft tissue was assessed via quantitative sensory testing. The vitality of the transplanted dental hard tissue was evaluated with clinically available testing methods. Native teeth and prostheses were also assessed. Sensation of transplanted oral mucosa varied based on time elapsed from FT, ranging from minimal at 3 months post-FT, to nearly complete recovery by approximately 24 months. There was mixed success with the integration of donor teeth (Patients 1, 4 and 6), including associated occlusal discrepancies. Mucosal complications included constriction at the donor/recipient interface (Patients 2 and 5) and solitary episodes of mucosal rejection presenting as lichenoid inflammation (Patients 2 and 4). Face transplantation represents a pivotal moment in the history of reconstructive surgery and transplant medicine, providing new optimism to patients with gross facial deformities. This report highlights the successes of FT, but also the challenges of transplanting hard and soft tissues to restore complex stomatognathic function. Further attention directed toward comprehensive oral rehabilitation in FT will contribute to improved outcomes, with the ultimate goal of restoring and optimizing patient quality of life.

  3. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Science.gov (United States)

    2010-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  4. Age estimation using intraoral periapical radiographs

    Directory of Open Access Journals (Sweden)

    Pooja S Rajpal

    2016-01-01

    Full Text Available Context: Changes in the size of dental pulp caused by the apposition of secondary dentin and occlusal wear are morphometric parameters for estimating age. Aim: To estimate the accuracy of age evaluation by Kvaal's method and the effect of occlusal wear on age using digital intraoral periapical radiographs in a subset of the Indian population. Materials and Methods: A total of 300 teeth were radiographically evaluated using intraoral periapical digital radiographs from 50 adult patients. A few modifications were made in the design of the study compared to the original Kvaal's method. The radiographs of three teeth from each jaw were taken and morphometric measurements in ratios were analyzed, which included the pulp length to tooth length (X1, pulp length to root length (X2, pulp width to root widths at three defined levels (X3, and tooth length to root length (X4. Statistical Analysis: The Pearson product-moment correlation coefficient (PCC between age and the morphological variables showed that among them X1, X2, and X3were statistically significant but not the tooth root length ratio (X4. Conclusions: The ratios X1, X2, and X3were good indicators of age and hence a multiple linear regression model for age estimation was derived using these three variables. However, it was found that X4was not a good indicator of age estimation in said population.

  5. Evaluation of occupational exposure in intraoral radiography; Avaliacao da dose ocupacional em radiografia intraoral

    Energy Technology Data Exchange (ETDEWEB)

    Miguel, Cristiano; Barros, Frieda S.; Rocha, Anna S.P.S.; Godoi, Walmor C., E-mail: miguel_cristianoch@yahoo.com.br, E-mail: saicla@utfpr.edu.br, E-mail: annarocha@yahoo.com, E-mail: walmor.godoi@gmail.com [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil); Tilly Junior, Joao G., E-mail: joao.tilly@derax.com.br [Universidade Federal do Parana (HC/UFPR), Curitiba, PR (Brazil). Hospital das Clinicas

    2014-07-01

    The intraoral radiography is widely performed in the dental office due to low cost and agility. The doses in intraoral radiology are considered low, however it is known that doses below the threshold for deterministic radiation has the potential to induce stochastic effects. An intraoral radiography has a risk of inducing fatal cancer or serious in order of 1:10,000,000. Besides the patient, the dentist may also be being exposed to radiation during the work with the radiographics practices. The bibliographies demonstrates the lack of information on radiation protection of dentists, however, the occupational dose reduction was observed in radiology over the past 14 years. This work aims to evaluate the effective dose of radiation to which workers can be exposed dentists in dental offices to perform intraoral radiographs. In this context, a study was be conducted between June 2013 and May 2014 with 44 professionals in Curitiba city. For each dentist was given a personal dosimeter to be used for 30 days. During this period, the number of radiographies and the length of the cable triggers of the X-ray equipment was registered and, the dosimeter´s dose was read. It was observed that the cables triggers meet regulatory standards and allow dentists to get the mean minimum distance of two meters from the radiation source in 93% of cases. Through analysis of the doses, it was concluded that occupational exposures of these workers are within the recommended threshold by regulatory 453/1998 of the Ministry of Health from Brazil. (author)

  6. Reduction of population dose in intraoral radiography

    International Nuclear Information System (INIS)

    First, the relationship between tumor induction especially in thyroid gland and salivary gland as exposure injuries and dental x-ray examination on human group was mentioned. Presumption of population exposure dose at time of examination was discussed from standpoint of genetically significant dose, per caput mean bone marrow dose, leukemia significant dose, and collective dose in thyroid gland. As the result, improvement of space distribution of a dose in intraoral radiography was discussed from standpoints of quality of x-ray and the size of irradiation field, and the distance from a focus to skin in considereation of reduction of exposure dose, and it was further considered by using x-ray film with high sensitivity of nonscreen type film and introducing screen. (Kanao, N.)

  7. Bloqueo y ensombrecimiento en un grupo de vertebrados filogenéticamente antiguo: los anfibios

    Directory of Open Access Journals (Sweden)

    M. Florencia Daneri

    2013-01-01

    Full Text Available En este artículo se describe el estudio de los fenómenos de bloqueo y ensombrecimiento en una tarea de aprendizaje espacial en un anfibio, el sapo terrestre Rhinella arenarum. Ambos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados, se describen por primera vez en un grupo con un cerebro filogenéticamente antiguo, como es el caso de los anfibios. Específicamente, se observó durante el aprendizaje espacial: (1 bloqueo entre claves visuales asociadas a una meta, y (2 ensombrecimiento de una clave visual lejana por la presencia de una clave cercana. Este hecho permite sentar un precedente para estudiar posteriormente los mecanismos biológicos que rigen el aprendizaje espacial, en búsqueda de patrones funcionales comunes con otras clases de vertebrados, potencialmente presentes en un ancestro común.

  8. Intraoral administration of botulinum toxin for trigeminal neuropathic pain.

    Science.gov (United States)

    Herrero Babiloni, Alberto; Kapos, Flavia P; Nixdorf, Donald R

    2016-06-01

    This article presents 2 cases of different neuropathic trigeminal pain conditions treated with intraoral botulinum toxin injections. There is a growing body of evidence to support the use of this substance when administered subcutaneously in the treatment of neuropathic pain, such as in extraoral injections for trigeminal neuralgia. However, reports of intraoral submucosal administration are still lacking. In the 2 cases presented here, neuropathic pain was refractory to treatment with an important intraoral peripheral component, so onabotulinum toxin A was introduced as an adjuvant therapy. The technique, doses, and dilution are discussed. The patients reported significant reductions in pain frequency and intensity, with minimal side effects of temporary mucosal dryness and smile droopiness. The analgesic benefits of botulinum toxin may be utilized to address intraoral neuropathic pain. Further studies are needed to confirm safety and effectiveness in larger samples. PMID:27181448

  9. Dental MRI using wireless intraoral coils.

    Science.gov (United States)

    Ludwig, Ute; Eisenbeiss, Anne-Katrin; Scheifele, Christian; Nelson, Katja; Bock, Michael; Hennig, Jürgen; von Elverfeldt, Dominik; Herdt, Olga; Flügge, Tabea; Hövener, Jan-Bernd

    2016-01-01

    Currently, the gold standard for dental imaging is projection radiography or cone-beam computed tomography (CBCT). These methods are fast and cost-efficient, but exhibit poor soft tissue contrast and expose the patient to ionizing radiation (X-rays). The need for an alternative imaging modality e.g. for soft tissue management has stimulated a rising interest in dental magnetic resonance imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray imaging, however, so far the spatial resolution of MRI is lower and the scan time is longer. In this contribution, we describe wireless, inductively-coupled intraoral coils whose local sensitivity enables high resolution MRI of dental soft tissue. In comparison to CBCT, a similar image quality with complementary contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250∙250∙500 μm(3) was achieved in 4 min only. Compared to dental MRI acquired with clinical equipment, the quality of the images was superior in the sensitive volume of the coils and is expected to improve the planning of interventions and monitoring thereafter. This method may enable a more accurate dental diagnosis and avoid unnecessary interventions, improving patient welfare and bringing MRI a step closer to becoming a radiation-free alternative for dental imaging. PMID:27021387

  10. Dental MRI using wireless intraoral coils

    Science.gov (United States)

    Ludwig, Ute; Eisenbeiss, Anne-Katrin; Scheifele, Christian; Nelson, Katja; Bock, Michael; Hennig, Jürgen; von Elverfeldt, Dominik; Herdt, Olga; Flügge, Tabea; Hövener, Jan-Bernd

    2016-03-01

    Currently, the gold standard for dental imaging is projection radiography or cone-beam computed tomography (CBCT). These methods are fast and cost-efficient, but exhibit poor soft tissue contrast and expose the patient to ionizing radiation (X-rays). The need for an alternative imaging modality e.g. for soft tissue management has stimulated a rising interest in dental magnetic resonance imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray imaging, however, so far the spatial resolution of MRI is lower and the scan time is longer. In this contribution, we describe wireless, inductively-coupled intraoral coils whose local sensitivity enables high resolution MRI of dental soft tissue. In comparison to CBCT, a similar image quality with complementary contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250•250•500 μm3 was achieved in 4 min only. Compared to dental MRI acquired with clinical equipment, the quality of the images was superior in the sensitive volume of the coils and is expected to improve the planning of interventions and monitoring thereafter. This method may enable a more accurate dental diagnosis and avoid unnecessary interventions, improving patient welfare and bringing MRI a step closer to becoming a radiation-free alternative for dental imaging.

  11. Dose measurements in intraoral radiography using thermoluminescent dosimeters

    Science.gov (United States)

    Azorín, C.; Azorín, J.; Aguirre, F.; Rivera, T.

    2015-01-01

    The use of X-ray in medicine demands to expose the patient and the professional to the lowest radiation doses available in agreement with ALARA philosophy. The reference level for intraoral dental radiography is 7 mGy and, in Mexico, a number of examinations of this type are performed annually. It is considered that approximately 25% of all the X-rays examinations carried out in our country correspond to intraoral radiographies. In other hand, most of the intraoral X-ray equipment correspond to conventional radiological systems using film, which are developed as much manual as automatically. In this work the results of determining the doses received by the patients in intraoral radiological examinations made with different radiological systems using LiF:Mg,Cu,P+PTFE thermoluminescent dosimeters are presented. In some conventional radiological systems using film, when films are developed manual or automatically, incident kerma up to 10.61 ± 0.74 mGv were determined. These values exceed that reference level suggested by the IAEA and in the Mexican standards for intraoral examinations.

  12. Diagnostic reference levels in intraoral dental radiography in Korea

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Eun Kyung; Han, Won Jeong; Choi, Jin Woo [Dept. of Oral and Maxillofacial Radiology, Dankook University College of Dentistry, Cheonan (Korea, Republic of); Jung, Yun Hoa [Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Pusan National University, Yangsan (Korea, Republic of); Yoon, Suk Ja; Lee, Jae Seo [Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Chonnam National University, Gwangju (Korea, Republic of)

    2012-09-15

    The objectives of this study were to survey the radiographic exposure parameters, to measure the patient doses for intraoral dental radiography nationwide, and thus to establish the diagnostic reference levels (DRLs) in intraoral dental X-ray examination in Korea. One hundred two intraoral dental radiographic machines from all regions of South Korea were selected for this study. Radiographic exposure parameters, size of hospital, type of image receptor system, installation duration of machine, and type of dental X-ray machine were documented. Patient entrance doses (PED) and dose-area products (DAP) were measured three times at the end of the exit cone of the X-ray unit with a DAP meter (DIAMENTOR M4-KDK, PTW, Freiburg, Germany) for adult mandibular molar intraoral dental radiography, and corrections were made for room temperature and pressure. Measured PED and DAP were averaged and compared according to the size of hospital, type of image receptor system, installation duration, and type of dental X-ray machine. The mean exposure parameters were 62.6 kVp, 7.9 mA, and 0.5 second for adult mandibular molar intraoral dental radiography. The mean patient dose was 2.11 mGy (PED) and 59.4 mGycm2 (DAP) and the third quartile one 3.07 mGy (PED) and 87.4 mGycm{sup 2} (DAP). Doses at university dental hospitals were lower than those at dental clinics (p<0.05). Doses of digital radiography (DR) type were lower than those of film-based type (p<0.05). We recommend 3.1 mGy (PED), 87.4 mGycm{sup 2} (DAP) as the DRLs in adult mandibular molar intraoral dental radiography in Korea.

  13. 21 CFR 872.1810 - Intraoral source x-ray system.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  14. Understanding the Potential of Digital Intraoral and Benchtop Scanning Workflows.

    Science.gov (United States)

    Jansen, Curtis E

    2015-01-01

    Although the overwhelming majority of dental offices now use digital radiography and patient records, relatively few yet use either stand-alone intraoral scanning systems (6%) or complete systems that combine intraoral scanning with computer-aided design and computer-aided manufacturing (12%). This should change as dentists become more aware of the numerous advantages scanning systems offer in terms of patient care and communication of patient information, particularly with the dental laboratory. This article reviews the various types of scanner architecture as well as potential workflow models. PMID:26625165

  15. Intraoral approach: A newer technique for filler injection

    Directory of Open Access Journals (Sweden)

    Chytra V Anand

    2010-01-01

    Full Text Available Filler injections are the most common aesthetic procedures used for volume correction. Various techniques have been described in the use of fillers. This article reviews the available literature on a new technique using the intraoral approach for injection of fillers.

  16. Physical and psychophysical properties of digital intraoral radiography

    OpenAIRE

    Stamatakis, Harry Charalabos

    1999-01-01

    Objectives: This thesis aimed to the evaluation of different digital intraoral radiographic systems, partly by defining objective measures of their physical properties, namely their resolution, signal and noise characteristics, and partly by employing methods to measure their psychophysical properties including viewer performance, such as the Perceptibility Curve test. In a next step, a mathematical model was developed to predict Perceptibility Curves without employing viewe...

  17. Bloqueo de Ganglio Estrellado en el tratamiento de angina de pecho refractaria: un posible tratamiento coadyuvante

    Directory of Open Access Journals (Sweden)

    Isaías Salas Herrera

    2002-04-01

    Full Text Available El presente trabajo corresponde una revisión bibliográfica de los estudios clínicos realizados en síndromes anginosos refractarios al tratamiento convencional, utilizando como tratamiento el bloqueo de ganglio estrellado. Se realizó una búsqueda de literatura publicada entre los años 1.900 al 2.000 en las bases de datos MDConsult, Medline y ProQuest. A su vez se revisaron las publicaciones en la Biblioteca del Hospital Rafael Ángel Calderón Guardia y en la Biblioteca del BINASSS (Biblioteca Nacional de Salud del Seguro Social. De acuerdo a los estudios analizados el bloqueo de ganglio estrellado se describe como posibilidad terapéutica para el control de dolor de la angina de pecho refractaria . La descripción clásica de la inervación cardíaca consiste en tres nervios simpáticos mayores originados de los ganglios cervicales superior, medio e inferior. Esta inervación simpática en conjunto con diversos nervios parasimpáticos, se describen como el plexo cardíaco. En contraste Jane et. al. (1986 en un estudio anatómico de 23 cadáveres describe que la inervación cardiopulmonar en el hombre se origina en el ganglio estrellado y las mitades caudales de las cadenas simpáticas cervicales junto con nervios que se originan del nervio recurrente laríngeo o del vago. De estas estructuras derivan los dos plexos cardiopulmonares. De estos plexos derivan tres nervios cardíacos mayores que se proyectan hacia el corazón. Se estima que determinado porcentaje de los pacientes diagnosticados con angina inestable progresará a desarrollar una angina refractaria al tratamiento. El bloqueo de ganglio estrellado podría ser un nuevo método terapéutico para controlar el dolor de dicha condición. Sin embargo se necesitan estudios clínicos randomizados a doble ciego para obtener resultados concluyentes.

  18. Bloqueo atrioventricular completo y reversible en un paciente con corazón estructuralmente sano

    Directory of Open Access Journals (Sweden)

    Oswaldo Gutiérrez-Sotelo

    2008-06-01

    Full Text Available Se presenta el caso de un paciente joven, deportista, quien presentó un episodio de síncope con pródromo breve, durante ejercicio físico. Se encontró el corazón estructuralmente normal y que durante la prueba de inclinación presentó bloqueo atrioventricular completo, que revirtió rápidamente con la posición de decúbito dorsal.We present the case of a young sportsman patient, who presented syncope with a brief prodrome, during physical activity. His heart is structurally normal and during head-up tilt testing he presented a complete atrioventricular block that fastly reverted rapidly with laying down position.

  19. Fiabilidad técnica del bloqueo caudal guiado con ecografía

    Directory of Open Access Journals (Sweden)

    A. Mendiola de la Osa

    2014-12-01

    Full Text Available Introducción: el bloqueo-infiltración caudal es una técnica utilizada en las unidades de dolor para tratar el dolor de origen radicular lumbosacro. Esta técnica se ha realizado clásicamente mediante referencias anatómicas o guiado mediante fluoroscopia. Se presenta la realización de la técnica eco-guiada y las complicaciones surgidas tras la realización de la misma. Material y métodos: estudio observacional descriptivo en el que se estudiaron las complicaciones de la técnica. Se realizaron 126 procedimientos en pacientes adultos de ambos sexos. Procedimiento: se localizó el hiato sacro mediante ecografía y se insertó una aguja de Touhy 18 G en el espacio epidural caudal perforando el ligamento sacro-coccígeo. Resultados: no surgieron complicaciones graves en ninguno de los pacientes. No hubo casos de mala ventana ecográfica por lo que se pudo realizar la técnica en todos los enfermos programados. Conclusión: debido a la ausencia de complicaciones la realización de la técnica eco-guiada es una alternativa segura y fiable a la técnica guiada con fluoroscopia. Mediante esta técnica se evita la exposición de radiaciones ionizantes. Además el bloqueo caudal eco-guiado no necesita del uso de contrastes yodados y permite transportar el ecógrafo a la cabecera del enfermo en caso de ser necesario.

  20. Intraoral tumor with rapid growing. Report of a case.

    Science.gov (United States)

    González-Martín-Moro, Javier; Cebrián-Carretero, Jose Luis; Gómez-García, Elena; del Castillo-Pardo de Vera, Jose Luis; del Val, Daniel

    2005-01-01

    The appearance of an intraoral mass is common in our specialty. Most are benign lesions, but some are primary malignancies. Metastases account for less than 1% of all oral malignancies. An 86 year old woman was referred to our department with a large, asymptomatic, intraoral, fast-growing mass. She had no previous cancer history or other relevant physical findings. The radiology studies showed underlying bone erosion. The histological study showed a metastatic adenocarcinoma with a suspected origin in the abdomen. We were unable to identify it by non invasive diagnostic procedures. Given the patient's general status and despite the ominous prognosis of such lesions, we decided not to perform any aggressive therapy beyond removing the oral mass, in order to maintain her quality of life. There have been no local recurrences until this time.

  1. Accuracy testing of a new intraoral 3D camera.

    Science.gov (United States)

    Mehl, A; Ender, A; Mörmann, W; Attin, T

    2009-01-01

    Surveying intraoral structures by optical means has reached the stage where it is being discussed as a serious clinical alternative to conventional impression taking. Ease of handling and, more importantly, accuracy are important criteria for the clinical suitability of these systems. This article presents a new intraoral camera for the Cerec procedure. It reports on a study investigating the accuracy of this camera and its potential clinical indications. Single-tooth and quadrant images were taken with the camera and the results compared to those obtained with a reference scanner and with the previous 3D camera model. Differences were analyzed by superimposing the data records. Accuracy was higher with the new camera than with the previous model, reaching up to 19 microm in single-tooth images. Quadrant images can also be taken with sufficient accuracy (ca 35 microm) and are simple to perform in clinical practice, thanks to built-in shake detection in automatic capture mode.

  2. Intraoral photobiomodulation-induced orthodontic tooth alignment: a preliminary study

    OpenAIRE

    Shaughnessy, Timothy; Kantarci, Alpdogan; Kau, Chung How; Skrenes, Darya; Skrenes, Sanjar; Ma, Dennis

    2016-01-01

    Background Numerous strategies have been proposed to decrease orthodontic treatment time. Photobiomodulation (PBM) has previously been demonstrated to assist in this objective. The aim of this study was to test if intraoral PBM increases the rate of tooth alignment and reduces the time required to resolve anterior dental crowding. Methods Nineteen orthodontic subjects with Class I or Class II malocclusion and Little’s Irregularity Index (LII) ≥ 3 mm were selected from a pool of applicants, pr...

  3. Avance maxilar en pacientes fisurados labio palatinos con distractor intraoral

    Directory of Open Access Journals (Sweden)

    Adoración Martínez Plaza

    2015-07-01

    Conclusiones: La DO intraoral es una técnica alternativa exitosa para avance del maxilar en pacientes fisurados labio palatinos que necesiten un avance inferior a 10 mm. Produce mejoras en el perfil esquelético y blando. Los dispositivos internos no producen impacto psicológico. La contención más larga en el tiempo. La recidiva es difícil de definir y calcular.

  4. Intraoral Laser Welding (ILW in Implant Prosthetic Dentistry: Case Report

    Directory of Open Access Journals (Sweden)

    Carlo Fornaini

    2012-01-01

    Full Text Available The aim of this clinical study was to describe the possibility of using the Nd:YAG laser device utilized in the dental offices to weld metals intraorally. The authors, before applying this technique “in vivo” on human subjects, tested the “in vitro” metal welding efficacy of dental Nd:YAG device firstly by interferometry, SEM, and EDS and subsequently by thermal camera and thermocouples in order to record temperature changes during the welding process on bovine jaws. Four implants were inserted in the edentulous maxillary arch of a 67 years old male patient. Immediately after that, a bar previously made by the dental technician was intraorally welded to the abutments by Nd:YAG laser (Fidelis Plus III, Fotona, Slovenia with these parameters: 9.90 mJ, 1 Hz, 15 msec, 0.6 mm spot. Then the prosthesis was connected to the bar with four OT Caps. This clinical study, even if preliminary, suggests that laser welding technique may be intraorally used without side effects.

  5. Intraoral Laser Welding (ILW) in Implant Prosthetic Dentistry: Case Report.

    Science.gov (United States)

    Fornaini, Carlo; Merigo, Elisabetta; Cernavin, Igor; Lòpez de Castro, Gonzalo; Vescovi, Paolo

    2012-01-01

    The aim of this clinical study was to describe the possibility of using the Nd:YAG laser device utilized in the dental offices to weld metals intraorally. The authors, before applying this technique "in vivo" on human subjects, tested the "in vitro" metal welding efficacy of dental Nd:YAG device firstly by interferometry, SEM, and EDS and subsequently by thermal camera and thermocouples in order to record temperature changes during the welding process on bovine jaws. Four implants were inserted in the edentulous maxillary arch of a 67 years old male patient. Immediately after that, a bar previously made by the dental technician was intraorally welded to the abutments by Nd:YAG laser (Fidelis Plus III, Fotona, Slovenia) with these parameters: 9.90 mJ, 1 Hz, 15 msec, 0.6 mm spot. Then the prosthesis was connected to the bar with four OT Caps. This clinical study, even if preliminary, suggests that laser welding technique may be intraorally used without side effects. PMID:22924134

  6. Digital intraoral radiographic quality assurance and control in private practice.

    Science.gov (United States)

    Walker, Timothy F; Mah, Peter; Dove, S Brent; McDavid, W Doss

    2014-01-01

    At present, the American Dental Association and the American Academy of Oral Maxillofacial Radiology have guidelines for the dental environment that include quality assurance and control of film-based radiography. Approximately 19%-30% of US dental offices currently use some form of digital intraoral radiography, and growth is expected to continue. It is anticipated that new tools and guidelines will be needed to aid in the development of quality assurance (QA) and control of digital intraoral radiographic images. Working with a representative sample of private practice dental offices, this study examined and evaluated the entire digital intraoral radiographic system used in each operatory. The X-ray machine was tested for equipment performance and accuracy, and the computer monitor calibration was evaluated and adjusted as needed. The results confirm the continued need for updated QA procedures in the dental office that include digital X-ray imaging. By implementing these changes and practices, dentists should be able to improve the diagnostic quality of radiographs while reducing the radiation exposure of the patient. PMID:25184710

  7. Electronic intraoral dental x-ray imaging system employing a direct sensing CCD array

    International Nuclear Information System (INIS)

    A commercial prototype intraoral radiography system has been developed that can provide digital x-ray images for diagnosis. The system consists of an intraoral detector head, an intermediate drive electronics package, a main drive electronics package and a PC-based digital image management system. The system has the potential to replace the use of dental film in intraoral radiographic examinations. High-resolution images are acquired, then displayed on a CRT within seconds of image acquisition

  8. Electronic intraoral dental x-ray imaging system employing a direct-sensing CCD array

    Science.gov (United States)

    Cox, John D.; Langford, D. S.; Williams, Donald W.

    1993-12-01

    A commercial prototype intraoral radiography system has been developed that can provide digital x-ray images for diagnosis. The system consists of an intraoral detector head, an intermediate drive electronics package, a main drive electronics package, and a PC-based digital image management system. The system has the potential to replace the use of dental film in intraoral radiographic examinations. High-resolution images are acquired, then displayed on a CRT within seconds of image acquisition.

  9. Changes in views on digital intraoral scanners among dental hygienists after training in digital impression taking

    OpenAIRE

    Park, Hye-Ran; Park, Ji-Man; Chun, Youn-Sic; Lee, Kkot-Nim; Kim, Minji

    2015-01-01

    Backgrounds Despite the rapid development of digital dentistry, the use of digital intraoral scanners remains limited. The aim of this study was to evaluate the changes in views on intraoral scanners among dental hygienists after training. Methods Thirty-four dental hygienists with >3 years of clinical experience participated and were divided into 2 groups : iTero and Trios groups. Participants of each group practiced the usage of both intraoral scanners, for total 12 times over 4 sessions, Q...

  10. Bloqueo espacial

    OpenAIRE

    Rodrigo i Calduch, Mª Teresa

    1996-01-01

    [spa] ¿Cómo resuelven los animales las discriminaciones espaciales o encuentran el camino a una meta situada en una determinada localización? O'Keefe y Nadel (1978) consideran que las ratas pueden aprender el camino hacia una meta en un laberinto de dos maneras diferentes. Una de ellas es mediante el aprendizaje táxico, que engloba dos estrategias distintas: la estrategia de respuesta u orientación, que consiste en el condicionamiento de movimientos de orientación (giros especificas a la dere...

  11. Versatility of radial forearm free flap for intraoral reconstruction

    Directory of Open Access Journals (Sweden)

    Jeremić Jelena V.

    2015-01-01

    Full Text Available Introduction. The radial forearm free flap has an important role in reconstruction of the oncologic defects in the region of head and neck. Objective. The aim was to present and evaluate clinical experience and results in the radial forearm free transfer for intraoral reconstructions after resections due to malignancies. Methods. This article illustrates the versatility and reliability of forearm single donor site in 21 patients with a variety of intraoral oncologic defects who underwent immediate (19 patients, 90.5% or delayed (2 patients, 9.5% reconstruction using free flaps from the radial forearm. Fascio-cutaneous flaps were used in patients with floor of the mouth (6 cases, buccal mucosa (5 cases, lip (1 case and a retromolar triangle (2 cases defects, or after hemiglossectomy (7 cases. In addition, the palmaris longus tendon was included with the flap in 2 patients that required oral sphincter reconstruction. Results. An overall success rate was 90.5%. Flap failures were detected in two (9.5% patients, in one patient due to late ischemic necrosis, which appeared one week after the surgery, and in another patient due to venous congestion, which could not be salvaged after immediate re-exploration. Two patients required re-exploration due to vein thrombosis. The donor site healed uneventfully in all patients, except one, who had partial loss of skin graft. Conclusion. The radial forearm free flap is, due to multiple advantages, an acceptable method for reconstructions after resection of intraoral malignancies. [Projekat Ministarstva nauke Republike Srbije, br. 41006

  12. Application of intra-oral dental scanners in the digital workflow of implantology

    NARCIS (Netherlands)

    W.J. van der Meer; F.S. Andriessen; D. Wismeijer; Y. Ren

    2012-01-01

    Intra-oral scanners will play a central role in digital dentistry in the near future. In this study the accuracy of three intra-oral scanners was compared. Materials and methods: A master model made of stone was fitted with three high precision manufactured PEEK cylinders and scanned with three intr

  13. Intraoral Morgellons disease or delusional parasitosis: a first case report.

    Science.gov (United States)

    Dovigi, Allan J

    2010-08-01

    Morgellons disease is a new emerging disease that is still controversial and believed to be, by some practitioners, as nothing more than delusional parasitosis. The Center for Disease Control has recently launched an epidemiological investigation into this disease due to the increased number of reports. A first case is reported of an oral lesion and symptoms consistent with Morgellons disease. The nature of the characteristic fibers associated with the intraoral lesion is investigated. Research has started at a number of institutions to elucidate the nature of this emerging disease. PMID:20489569

  14. Intraoral Laser Welding (ILW) in Implant Prosthetic Dentistry: Case Report

    OpenAIRE

    Carlo Fornaini; Elisabetta Merigo; Igor Cernavin; Gonzalo Lòpez de Castro; Paolo Vescovi

    2012-01-01

    The aim of this clinical study was to describe the possibility of using the Nd:YAG laser device utilized in the dental offices to weld metals intraorally. The authors, before applying this technique “in vivo” on human subjects, tested the “in vitro” metal welding efficacy of dental Nd:YAG device firstly by interferometry, SEM, and EDS and subsequently by thermal camera and thermocouples in order to record temperature changes during the welding process on bovine jaws. Four implants were insert...

  15. Intraoral Burkitt's lymphoma in an HIV positive patient

    OpenAIRE

    Vidya Ajila; Gopakumar, R; Shruthi Hegde; G Subhas Babu

    2012-01-01

    Burkitt′s lymphoma is an aggressive form of Non-Hodgkin′s lymphoma composed of malignant cells of B lymphocyte origin. Burkitt′s lymphoma is a rarity in the Indian subcontinent. Though intraoral Burkitt′s lymphoma in HIV positive individuals is very uncommon, its importance lies in the fact that it is often the first sign of the underlying immunosuppression. We present a case of Burkitt′s lymphoma in right maxillary region which was the first manifestation of HIV in the patient.

  16. New intraoral x-ray fluorographic imaging for dentistry

    International Nuclear Information System (INIS)

    A new dental x-ray fluorographic unit has been developed. This unit is composed of small intraoral x-ray tube, a compact x-ray image intensifier, and a high-resolution TV system. The purposes for developing this equipment were to (1) directly observe the tooth during endodontic procedures and (2) reduce x-ray exposure to the patient and the dentist. The radiation exposure can be reduced to about 1/600 the exposure used with conventional dental film. In clinical trials, a satisfactory fluorographic dental image for endodontic treatment was obtained with this new device

  17. El blocao (y el bloqueo de José Díaz Fernández

    Directory of Open Access Journals (Sweden)

    Luis Fernando Bueno Morillas

    2015-06-01

    Full Text Available El blocao (1928 fue la primera novela de José Díaz Fernández. Supuso un éxito editorial insólito hasta entonces porque reunía tres características novedosas: una actitud crítica ante la guerra de Marruecos, una integración de las novedades vanguardistas en la que su autor llamó literatura de avanzada y un posicionamiento del intelectual al lado de las reivindicaciones del pueblo. Sin embargo, aunque publicó otra novela un año después (La Venus mecánica, un libro teórico en el que definía la literatura que él propugnaba y practicaba (El nuevo romanticismo y algunas narraciones breves, Díaz Fernández se bloqueó y dejó la literatura narrativa que tan buenas expectativas levantó. Analizaremos las posibles causas de ese bloqueo.

  18. Histerectomía radical en paciente con enfermedad de Steinert: raquianestesia, ketamina y bloqueos TAP y de la vaina de los rectos

    Directory of Open Access Journals (Sweden)

    I. Armendáriz-Buil

    2015-12-01

    Full Text Available Se presenta el caso de una paciente con enfermedad de Steinert que fue intervenida de histerectomía radical. Debido a lo avanzado de su enfermedad con insuficiencia respiratoria crónica que requería ventilación mecánica no invasiva (VMNI nocturna, se escogió raquianestesia como tratamiento anestésico. En el momento de la linfadenectomía aórtica, la paciente refirió dolor moderado en hipogastrio, siendo bien controlado con bolos de 10 mg de ketamina. En el postoperatorio, se evitó la administración de opioides aplicando bloqueos de la pared abdominal: bloqueo del plano transverso del abdomen (TAP y bloqueo de la vaina de los músculos rectos abdominales. La evolución de la paciente fue satisfactoria siendo dada de alta el quinto día tras la intervención.

  19. A method of multi-view intraoral 3D measurement

    Science.gov (United States)

    Zhao, Huijie; Wang, Zhen; Jiang, Hongzhi; Xu, Yang; Lv, Peijun; Sun, Yunchun

    2015-02-01

    In dental restoration, its important to achieve a high-accuracy digital impression. Most of the existing intraoral measurement systems can only measure the tooth from a single view. Therfore - if we are wilng to acquire the whole data of a tooth, the scans of the tooth from multi-direction ad the data stitching based on the features of the surface are needed, which increases the measurement duration and influence the measurement accuracy. In this paper, we introduce a fringe-projection based on multi-view intraoral measurement system. It can acquire 3D data of the occlusal surface, the buccal surface and the lingual surface of a tooth synchronously, by using a senor with three mirrors, which aim at the three surfaces respectively and thus expand the measuring area. The constant relationship of the three mirrors is calibrated before measurement and can help stitch the data clouds acquired through different mirrors accurately. Therefore the system can obtain the 3D data of a tooth without the need to measure it from different directions for many times. Experiments proved the availability and reliability of this miniaturized measurement system.

  20. Intraoral sonographic features of tongue cancer after radical radiotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Chikui, Toru E-mail: chikui@rad.dent.kyushu-u.ac.jp; Kawazu, Toshiyuki; Nakamura, Katsumasa; Urashima, Yuusuke; Yuasa, Kenji; Kanda, Shigenobu

    2004-12-01

    Purpose: The purpose was to illustrate the sonographic changes of tongue cancer after radical radiotherapy. Materials and methods: In 24 patients with tongue cancer treated by interstitial brachytherapy (BRT) (uneventful recovery n=16, recurrence n=5, severe soft tissue complication n=3), follow-up examination were performed and both the margin and the vascular pattern were retrospectively assessed. We basically performed US examination at least once every 3 months after BRT within 1 year during follow-up period. Results: In the healing process, intraoral sonography shows an unclear margin immediately after brachytherapy and a transient increase of the vascularity lasted within 6 months after BRT, followed by a decrease in the vascularity. The large difference in echogenicity between the primary site and the surrounding tissue and the increased difference suggested the possibility of either radiation ulceration or recurrence. Conclusion: Intraoral sonography could depict the sequence changes of the tongue after BRT, and it was thus useful to confirm the clinical findings of either radiation ulcers or recurrence.

  1. Facial exposure dose assessment during intraoral radiography by radiological technologists

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Hwan; Yang, Han Joon [Dept. of International Radiological Science, Hallym University of Graduate Studies, Chuncheon (Korea, Republic of)

    2014-09-15

    The study examined the changes in the decreased facial exposure dose for radiological technologists depending on increased distance between the workers and the X-ray tube head during intraoral radiography. First, the facial phantom similar to the human tissues was manufactured. The shooting examination was configured to the maxillary molars for adults (60 kVp, 10 mA, 50 msec) and for children (60 kVp, 10 mA, 20 msec), and the chamber was fixed where the facial part of the radiation worker would be placed using the intraoral radiography equipment. The distances between the X-ray tube head and the phantom were set to 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, and 40 cm. The phantom was radiated 20 times with each examination condition and the average scattered doses were examined. The rate at the distance of 40 cm decreased by about 92.6% to 7.43% based on the scattered rays radiated at the distance of 10 cm under the adult conditions. The rate at the distance of 40 cm decreased by about 97.6% to 2.58% based on the scattered rays radiated at the distance of 10 cm under the children conditions. Protection from the radiation exposure was required during the dental radiographic examination.

  2. Facial exposure dose assessment during intraoral radiography by radiological technologists

    International Nuclear Information System (INIS)

    The study examined the changes in the decreased facial exposure dose for radiological technologists depending on increased distance between the workers and the X-ray tube head during intraoral radiography. First, the facial phantom similar to the human tissues was manufactured. The shooting examination was configured to the maxillary molars for adults (60 kVp, 10 mA, 50 msec) and for children (60 kVp, 10 mA, 20 msec), and the chamber was fixed where the facial part of the radiation worker would be placed using the intraoral radiography equipment. The distances between the X-ray tube head and the phantom were set to 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, and 40 cm. The phantom was radiated 20 times with each examination condition and the average scattered doses were examined. The rate at the distance of 40 cm decreased by about 92.6% to 7.43% based on the scattered rays radiated at the distance of 10 cm under the adult conditions. The rate at the distance of 40 cm decreased by about 97.6% to 2.58% based on the scattered rays radiated at the distance of 10 cm under the children conditions. Protection from the radiation exposure was required during the dental radiographic examination

  3. Síndrome de Horner contralateral asociado a bloqueo de ganglio estrellado: reporte de caso y revisión de la literatura

    OpenAIRE

    A. Cadavid Puentes; F. Bermúdez Guerrero; M.V. Zea Medina

    2014-01-01

    Se describe un caso de síndrome de Horner contralateral luego de bloqueo de ganglio estrellado. Se trata de un varón de 56 años con diagnóstico de síndrome doloroso regional complejo tipo II en miembro superior derecho quien posterior a la aplicación de anestésico local guiado por ecografía en proximidad al ganglio estrellado derecho presenta síndrome de Horner izquierdo. El síndrome de Horner contralateral a un bloqueo de ganglio estrellado es una entidad de ocurrencia supremamente rara, en ...

  4. Uso de la ecografía para el bloqueo de los nervios periféricos del miembro pelviano en el gato (Felis catus L.)

    OpenAIRE

    Haro Álvarez, Ana Paulina

    2013-01-01

    El presente estudio fue llevado a cabo para describir la apariencia ecográfica y desarrollar los abordajes ecoguiados para el bloqueo de los nervios ciático y femoral, así como evaluar la eficacia clínica del bloqueo ecoguiado del nervio ciático en el gato. Se realizaron disecciones anatómicas y criosecciones para determinar las marcas anatómicas para localizar los nervios de interés. La apariencia ecográfica de los nervios ciático y femoral fue estudiada tanto en cadáveres como en gatos vivo...

  5. Uso de la ecografía para el bloqueo de nervios periféricos del miembro torácico en el gato (Felis catus L:)

    OpenAIRE

    Ansón Fernández, Agustina

    2016-01-01

    Objetivos 1. Describir los abordajes ecográficos para la evaluación del plexo braquial (PB) y los principales nervios del miembro torácico, así como la anatomía y apariencia ecográfica normales correlacionando las imágenes ecográficas con la disección anatómica y las criosecciones. 2. Establecer los abordajes ecográficos para el bloqueo ecoguiado del PB. 3. Determinar la eficacia de los diferentes abordajes para el bloqueo anestésico ecoguiado del PB, mediante la evaluación de la d...

  6. Fine needle aspiration biopsy of intraoral and oropharyngeal mass lesions

    Directory of Open Access Journals (Sweden)

    Saleh Husain A

    2008-03-01

    Full Text Available Abstract Background Fine needle aspiration (FNA biopsy has been rarely used in oral and oropharyngeal lesions. The goal of this study was to assess the value and accuracy of FNA biopsy in the diagnosis of oral and oropharyngeal lesions particularly in regards to discriminating benign from malignant tumors. Methods Sixteen cases of FNA biopsies obtained of various intraoral and oropharyngeal masses or lesions performed at our institution during the eight-year period from 1998 to 2006 were retrospectively reviewed. The aspiration cytologic diagnoses were correlated with the histologic examination of the corresponding resected lesions. Results Sixteen cases of intraoral lesions evaluated by FNA biopsies during the period of 1998–2006 were reviewed. The sites of involvement were: lip 1, maxillary sinus 3, pharynx/oropharynx 5, floor of mouth 4, buccal mucosa 2 and peritonsillar area 1. Patients' age ranged from 30 to 87 with an average of 54 years. Male to female ratio was 1:3. Cytologically, 7 cases were diagnosed as suspicious/malignant, and 9 cases as benign (including 6 benign neoplasm, 1 atypical, and 2 reactive or "descriptive". Fifteen cases had corresponding surgical resection for histologic examination, of these, 9 cases were interpreted as malignant, and 6 as benign. There were no false positive diagnoses of malignancy on FNA. Two cases were interpreted as benign or atypical cytologically, but were found to be malignant on histologic examination. Conclusion FNA biopsy of intraoral and oropharyngeal masses is a valuable procedure for the initial evaluation of various lesions. It provides helpful information about these lesions and avoids hasty or unnecessary surgical biopsy. It is a rapid and relatively noninvasive procedure. Furthermore, aspiration biopsy is an important tool in the diagnosis and management of these lesions, both neoplastic and non-neoplastic, and can be sometimes complemented by ancillary studies for more accurate

  7. Application of Intra-Oral Dental Scanners in the Digital Workflow of Implantology

    OpenAIRE

    Wicher J van der Meer; Frank S Andriessen; Daniel Wismeijer; Yijin Ren

    2012-01-01

    Intra-oral scanners will play a central role in digital dentistry in the near future. In this study the accuracy of three intra-oral scanners was compared. Materials and methods: A master model made of stone was fitted with three high precision manufactured PEEK cylinders and scanned with three intra-oral scanners: the CEREC (Sirona), the iTero (Cadent) and the Lava COS (3M). In software the digital files were imported and the distance between the centres of the cylinders and the angulation b...

  8. Accidental intraoral injection of formalin during extraction: case report.

    Science.gov (United States)

    Swami, Pushp Chander; Raval, Rushik; Kaur, Mandeep; Kaur, Jasleen

    2016-04-01

    Transparent, clear solutions such as hydrogen peroxide, alcohol, sodium hypochlorite, formaldehyde, and local anaesthetics are widely used in dentistry, so the tissues are liable to accidental injury. Formalin, a 37%-40% solution of formaldehyde, is extensively used in 10% solution as a tissue preservative, but it has toxic effects on systems such as the gastrointestinal tract, respiratory tract, skin, and mucosa. However, we know of few reports of cases of inadvertent injection of alcohol and formalin directly into the human body. In this case report we describe the early and delayed clinical effects of accidental intraoral injection of formalin, the subsequent symptoms and management, and some prudent points that should be learnt to avoid such incidents in the future. PMID:26794082

  9. Removal of an extensive mandibular odontoma using an intraoral approach.

    Science.gov (United States)

    Lehman, Hadas; Lustmann, Joshua; Regev, Eran

    2013-01-01

    Odontomas, the most common odontogenic tumors, occur more frequently in the maxilla and are rarely larger than a tooth. They are usually found incidentally on routine dental radiographs during the second decade of life. The treatment of choice is surgical removal, and large tumors are challenging as damage may occur to surrounding anatomic structures. In this article we describe a "giant" compound odontoma occupying the entire body of the mandible and ramus in a 7-year-old girl. A conservative intraoral enucleation was used to avoid facial scarring and preserve mandibular continuity and function. The huge bony defect healed completely without a bone graft or further intervention. This case report emphasizes the importance of the early diagnosis of these lesions and a conservative surgical approach as well as the extraordinary healing potential of young patients.

  10. Analyses of superficial and depth doses in intraoral radiology

    Energy Technology Data Exchange (ETDEWEB)

    Silva Santos de Oliveira, C.; Morais, R.P. de; Nascimento Souza, D. do [Universidade Federal de Sergipe - CCET - Dept. de Fisica, Sao Cristovao, SE (Brazil)

    2006-07-01

    In this work dosimetric analysis using thermoluminescence technique to study the beams characteristics of x-rays employed in dental radiology has been carried out. The obtained results with CaSO{sub 4}:Dy thermoluminescent dosimeters (TLD) were compared to the doses obtained with parallel-plates ionization chamber. Dosimetric evaluations were also done using radiographic films of large dimensions. The x-rays equipments analyzed were installed in the radiological services of Odontology Department of Sergipe Federal University (U.F.S.). Depending on the anatomical region to be examined the proper exposure time was select, for a fix voltage of 70 kV. The results with TLD and ionization chamber have been determined to female and male individuals. The intraoral regions analysed were the peri apical of the incisors, molar and pre-molar teeth and the occlusive region. These regions were simulated using acrylic plates absorbers installed on the film packet holder. The evaluation of the depth doses in the intraoral tissue was obtained using different acrylic plate thickness. The air kerma values have been evaluated with the ionization chamber located in the dental cone exit of the x-rays equipments. The integrated areas of the thermoluminescent glow curves showed coherent values when compared to the ones obtained with the ionization chamber and both methods presented a linear dependence with the exposition time. The analyses with films have allowed the evaluation of the beam scattering in the simulator apparatus. The studies had proven that the analysis of superficial dose and in depth used in dental radiology can be carried with thermoluminescent dosimeters. (authors)

  11. Analyses of superficial and depth doses in intraoral radiology

    International Nuclear Information System (INIS)

    In this work dosimetric analysis using thermoluminescence technique to study the beams characteristics of x-rays employed in dental radiology has been carried out. The obtained results with CaSO4:Dy thermoluminescent dosimeters (TLD) were compared to the doses obtained with parallel-plates ionization chamber. Dosimetric evaluations were also done using radiographic films of large dimensions. The x-rays equipments analyzed were installed in the radiological services of Odontology Department of Sergipe Federal University (U.F.S.). Depending on the anatomical region to be examined the proper exposure time was select, for a fix voltage of 70 kV. The results with TLD and ionization chamber have been determined to female and male individuals. The intraoral regions analysed were the peri apical of the incisors, molar and pre-molar teeth and the occlusive region. These regions were simulated using acrylic plates absorbers installed on the film packet holder. The evaluation of the depth doses in the intraoral tissue was obtained using different acrylic plate thickness. The air kerma values have been evaluated with the ionization chamber located in the dental cone exit of the x-rays equipments. The integrated areas of the thermoluminescent glow curves showed coherent values when compared to the ones obtained with the ionization chamber and both methods presented a linear dependence with the exposition time. The analyses with films have allowed the evaluation of the beam scattering in the simulator apparatus. The studies had proven that the analysis of superficial dose and in depth used in dental radiology can be carried with thermoluminescent dosimeters. (authors)

  12. Bloqueo y radiofrecuencia de la articulación sacroilíaca Block and radiofrequency sacroiliac joint

    Directory of Open Access Journals (Sweden)

    J. De Andrés Ares

    2012-12-01

    Full Text Available La articulación sacroilíaca (ASI es una importante fuente de dolor axial, contribuyendo en hasta un 15% del dolor crónico axial. Existen numerosas pruebas diagnósticas, aunque el examen físico, las pruebas radiológicas son insuficientes para el adecuado diagnóstico. El criterio diagnóstico más aceptado es el alivio del dolor de la ASI tras uno o varios bloqueos diagnósticos intra-articulares con anestésicos locales, realizados de manera adecuada. El proceder ante la positividad del bloqueo es la radiofrecuencia de las ramas que inervan la ASI. En el siguiente artículo se repasará la anatomía, el diagnóstico y los distintos tratamientos intervencionistas del dolor de origen sacroilíaco.Sacroiliac joint (ASI is an important source of pain, contributing to 15% of chronic back pain. There are numerous diagnostic tests, although historical and physical examination findings and radiological imaging are insufficient for a proper diagnosis. An analgesic response to a properly performed diagnostic block, is the most reliable method to diagnose sacroiliac joint pain. If there is a positive block, radiofrequency denervation of the ASI is performed for a longterm pain-free period. The following article will review the anatomy, diagnosis and interventional treatment of sacroiliac joint pain.

  13. Intraoral air pressure and oral air flow under different bleed and bite-block conditions.

    Science.gov (United States)

    Putnam, A H; Shelton, R L; Kastner, C U

    1986-03-01

    Intraoral pressures and oral flows were measured as normal talkers produced /p lambda/ and /si/ under experimental conditions that perturbed the usual aeromechanical production characteristics of the consonants. A translabial pressure-release device was used to bleed off intraoral pressure during /p/. Bite-blocks were used to open the anterior bite artificially during /s/. For /p/, intraoral pressure decreased and translabial air leakage increased as bleed orifice area increased. For /s/, flow increased as the area of sibilant constriction increased, but differential pressure across the /s/ oral constriction did not vary systematically with changes in its area. Flow on postconsonantal vowels /lambda/ and /i/ did not vary systematically across experimental conditions. The data imply that maintenance of perturbed intraoral pressure was more effective when compensatory options included opportunity for increased respiratory drive and structural adjustments at the place of consonant articulation rather than increased respiratory drive alone.

  14. Recent advances in dental optics - Part I: 3D intraoral scanners for restorative dentistry

    Science.gov (United States)

    Logozzo, Silvia; Zanetti, Elisabetta M.; Franceschini, Giordano; Kilpelä, Ari; Mäkynen, Anssi

    2014-03-01

    Intra-oral scanning technology is a very fast-growing field in dentistry since it responds to the need of an accurate three-dimensional mapping of the mouth, as required in a large number of procedures such as restorative dentistry and orthodontics. Nowadays, more than 10 intra-oral scanning devices for restorative dentistry have been developed all over the world even if only some of those devices are currently available on the market. All the existing intraoral scanners try to face with problems and disadvantages of traditional impression fabrication process and are based on different non-contact optical technologies and principles. The aim of this publication is to provide an extensive review of existing intraoral scanners for restorative dentistry evaluating their working principles, features and performances.

  15. The outcome of intraoral onlay block bone grafts on alveolar ridge augmentations: A systematic review

    OpenAIRE

    Aloy Prósper, Amparo; Peñarrocha Oltra, David; Peñarrocha Diago, María; Peñarrocha Diago, Miguel

    2015-01-01

    Aim: The purpose of this study was to systematically review clinical studies examining the survival and success rates of implants placed with intraoral onlay autogenous bone grafts to answer the following question: do ridge augmentations procedures with intraoral onlay block bone grafts in conjunction with or prior to implant placement influence implant outcome when compared with a control group (guided bone regeneration, alveolar distraction, native bone or short dental implants.)? Material ...

  16. Bloqueo epidural lumbar continuo para espasmos vesicales incoercibles Continuous lumbar epidural uncontrollable bladder spasms

    Directory of Open Access Journals (Sweden)

    C. López Carballo

    2013-04-01

    Full Text Available Presentamos un caso clínico de espasmos vesicales por hiperactividad del detrusor de la vejiga, desencadenados por lavado vesical continuo aplicado en un paciente con hematuria, en el contexto de hipertrofia benigna de próstata. Los espasmos llegaron a ser refractarios a tratamiento sistémico con antimuscarínicos, espasmolíticos y opioides. Se optó por la colocación de un catéter epidural lumbar para infusión continua de anestésicos locales y opioides como terapia analgésica alternativa, que no solo proporcionó un aceptable grado de confort, sino que permitió el mantenimiento del sondaje uretral y el lavado vesical continuo. Realizamos una revisión bibliográfica sobre el uso del bloqueo epidural de la neurotransmisión de las aferencias sensitivas vesicales en dolor de origen disfuncional vesical, y analizamos algunas de la teorías publicadas sobre la fisiopatología y génesis de dolor en estos trastornos vesicales, con la intención de interpretar las peculiaridades y complejidad del dolor en el cuadro del caso presentado.We present a clinical case of bladder spasms due to detrusor overactitivity, triggered by continuous vesicoclysis therapy, which was applied in a patient with benign prostatic hypertrophy-related hematuria. Bladder spasms turned out to be refractory to combined antimuscarinic, spasmolytic and systemic opioid therapies. Implantation of a lumbar epidural catheter was chosen for continuous epidural infusion of local anesthetics and opioid drugs as an alternate analgesic therapy, which provided the patient an optimum comfort, but let urethral indwelling catheterization and the maintenance of continuous vesicoclysis therapy as well. We reviewed scientific literature concerning bladder-afferent neurotransmission blockade at epidural level for dysfunctional bladder pain therapy, and discussed several published theories about pain physiopathology and origin in those cases of dysfunctional bladder disturbance, with the

  17. Bloqueios nervosos guiados por ultra-som Bloqueos nerviosos guiados por ultrasonido Ultrasound-guided nerve blocks

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2007-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As técnicas de bloqueios nervosos guiados por ultra-som são baseadas na visualização direta das estruturas nervosas, da agulha de bloqueio e das estruturas anatômicas adjacentes. Desta maneira, é possível depositar a solução de anestésico local precisamente em torno dos nervos e acompanhar a sua dispersão em tempo real, obtendo-se, assim, um bloqueio mais eficaz, de menor latência, menor dependência de referências anatômicas, menor volume de solução anestésica e maior segurança. CONTEÚDO: O artigo revisa os aspectos relativos aos mecanismos físicos para formação de imagens, a anatomia ultra-sonográfica do neuroeixo e dos plexos braquial e lombossacral, os equipamentos e materiais empregados nos bloqueios, os ajustes do aparelho de ultra-som para melhorar as imagens, os planos de visualização das agulhas de bloqueio e as técnicas e o treinamento em bloqueios guiados por ultra-som. CONCLUSÕES: Os passos para se obter sucesso em anestesia regional incluem a identificação exata da posição dos nervos, a localização precisa da agulha, sem lesões nas estruturas adjacentes e, finalmente, a injeção cuidadosa de anestésico local junto aos nervos. Embora a neuroestimulação forneça grande auxílio na identificação dos nervos, esta não consegue, isoladamente, preencher todas essas exigências. Por isso, acredita-se que os bloqueios guiados por ultra-som serão a técnica de eleição para anestesia regional num futuro não muito distante.JUSTIFICATIVA Y OBJETIVOS: Las técnicas de bloqueos nerviosos guiados por ultrasonido se basan en la visualización directa de las estructuras nerviosas, de la aguja de bloqueo y de las estructuras anatómicas adyacentes. De esa manera, se puede depositar la solución de anestésico local precisamente en torno de los nervios y acompañar su dispersión en tiempo real, obteniéndose así, un bloqueo más eficaz, de menor latencia, menor dependencia de

  18. Patient doses during intra-oral radiography in dental offices

    International Nuclear Information System (INIS)

    Measurement of patient entrance dose (PED) and dose area product (DAP) at various dental offices in the Tokyo bay area and comparison of PEDs with the existing diagnostic reference levels recommended in the United Kingdom (UK). The survey included 28 dental clinics categorized by the type of intra-oral radiography used. PED was measured by placing an optically stimulated luminescence dosimeter (OSLD) at the tip of the cone. Exposure parameters were those used for the adult mandibular molar region in the respective clinics. The OSLD readings were calibrated using an ionizing chamber manufactured according to standards of the Japan Quality Assurance Organization. The area (A), of the X-ray beam, was calculated by exposing an X-ray film placed at the tip of the cone and measuring the exposed area. Then the DAP was calculated as the product of PED times A. The PED estimated at various dental clinics differed by a factor of 120. The mean, minimum, maximum, median and third quartile values of PEDs were 4.99, 0.18, 21.7, 3.60 and 5.76 mGy, respectively. At 60-70 kV, PEDs observed in clinics using digital imaging systems were below 2.1 mGy which was lower than that of clinics using films that were E-speed or faster. It was also observed that PEDs were directly proportional to the tube current and exposure time. The mean, minimum, maximum, median and third quartile of DAPs were 13.0, 0.45, 61.4, 9.34 and 13.4 cGy cm2, respectively. The DAP values showed a linear correlation coefficient of 0.99 with PED values. Measurement of PED and DAP using OSLD and X-ray film can play a useful role in optimization of radiation protection for patients during intra-oral radiography. This method can be conveniently applied to set up diagnostic reference levels by carrying out mass surveys in Japan. (author)

  19. Fatigue failure of dental implants in simulated intraoral media.

    Science.gov (United States)

    Shemtov-Yona, K; Rittel, D

    2016-09-01

    Metallic dental implants are exposed to various intraoral environments and repetitive loads during service. Relatively few studies have systematically addressed the potential influence of the environment on the mechanical integrity of the implants, which is therefore the subject of this study. Four media (groups) were selected for room temperature testing, namely dry air, saliva substitute, same with 250ppm of fluoride, and saline solution (0.9%). Monolithic Ti-6Al-4V implants were loaded until fracture, using random spectrum loading. The study reveals that the only aggressive medium of all is the saline solution, as it shortens significantly the spectrum fatigue life of the implants. The quantitative scanning electron fractographic analysis indicates that all the tested implants grew fatigue cracks of similar lengths prior to catastrophic fracture. However, the average crack growth rate in the saline medium was found to largely exceed that in other media, suggesting a decreased fracture toughness. The notion of a characteristic timescale for environmental degradation was proposed to explain the results of our spectrum tests that blend randomly low and high cycle fatigue. Random spectrum fatigue testing is powerful technique to assess and compare the mechanical performance of dental implants for various designs and/or environments. PMID:27353062

  20. Diagnostic accuracy of insight intraoral film on dental caries

    Energy Technology Data Exchange (ETDEWEB)

    Yoon, Young Nam; Lee, Byung Do [Wonkwang University College of Medicine, Iksan (Korea, Republic of); Lee, Sang Rae [Kyunghee University College of Medicine, Seoul (Korea, Republic of)

    2004-03-15

    To compare the diagnostic accuracy of Kodak Insight film with other intra-oral films in the detection of dental caries. Periapical radiographs of 99 extracted human teeth with sound proximal surfaces and interproximal artificial cavities were made on Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Kodak Insight films and automatically processed. Six dentists examined the presence of dental caries using a five-point confidence rating scale and compared the diagnostic accuracy by ROC (Receiver Operating Characteristic) analysis and ANOVA test. The sensitivity of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.84, 0.77, 0.75 and 0.79 respectively. The specificity of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.97, 0.95, 0.96 and 0.94 respectively. The mean ROC areas (Az) of Kodak Ultra speed, Ektaspeed, Agfa Ektaspeed and Insight film were 0.917, 0.910, 0.894, 0.909 respectively. There was no significant differences between Az of Insight film and other films (p = 0.178). Theses results suggested that Kodak Insight film have the comparative diagnostic accuracy of dental caries with Ultraspeed and Ektaspeed films. (77)

  1. First detection of lead in black paper from intraoral film

    Energy Technology Data Exchange (ETDEWEB)

    Guedes, Debora F.C., E-mail: defcg@usp.br [Departamento de Odontologia Restauradora, Faculdade de Odontologia de Ribeirao Preto, Universidade de Sao Paulo, Av. do Cafe, S/N, Monte Alegre, CEP 14040-904, Ribeirao Preto, SP (Brazil); Silva, Reginaldo S. [Departamento de Odontologia Restauradora, Faculdade de Odontologia de Ribeirao Preto, Universidade de Sao Paulo, Av. do Cafe, S/N, Monte Alegre, CEP 14040-904, Ribeirao Preto, SP (Brazil); Veiga, Marcia A.M.S. da [Departamento de Quimica, Faculdade de Filosofia, Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo, Av. do Cafe, S/N, Monte Alegre, CEP 14040-904, Ribeirao Preto, SP (Brazil); Pecora, Jesus D. [Departamento de Odontologia Restauradora, Faculdade de Odontologia de Ribeirao Preto, Universidade de Sao Paulo, Av. do Cafe, S/N, Monte Alegre, CEP 14040-904, Ribeirao Preto, SP (Brazil)

    2009-10-30

    Lead (Pb) contamination in the black paper that recovers intraoral films (BKP) has been investigated. BKP samples were collected from the Radiology Clinics of the Dental School of Ribeirao Preto, University of Sao Paulo, Brazil. For sake of comparison, four different methods were used. The results revealed the presence of high lead levels, well above the maximum limit allowed by the legislation. Pb contamination levels achieved after the following treatments: paper digestion in nitric acid, microwave treatment, DIN38414-54 method and TCLP method were 997 {mu}g g{sup -1}, 189 {mu}g g{sup -1}, 20.8 {mu}g g{sup -1}, and 54.0 {mu}g g{sup -1}, respectively. Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma mass spectrometry (ICP-MS) were employed for lead determination according to the protocols of the applied methods. Lead contamination in used BKP was confirmed by scanning electron microscopy coupled with energy dispersive X-ray microanalysis (SEM-EDS). All the SEM imaging was carried out in the secondary electron mode (SE) and backscattered-electron mode (QBSD) following punctual X-ray fluorescence spectra. Soil contamination derived from this product revealed the urgent need of addressing this problem. These elevated Pb levels, show that a preliminary treatment of BKP is mandatory before it is disposed into the common trash. The high lead content of this material makes its direct dumping into the environment unwise.

  2. First detection of lead in black paper from intraoral film

    International Nuclear Information System (INIS)

    Lead (Pb) contamination in the black paper that recovers intraoral films (BKP) has been investigated. BKP samples were collected from the Radiology Clinics of the Dental School of Ribeirao Preto, University of Sao Paulo, Brazil. For sake of comparison, four different methods were used. The results revealed the presence of high lead levels, well above the maximum limit allowed by the legislation. Pb contamination levels achieved after the following treatments: paper digestion in nitric acid, microwave treatment, DIN38414-54 method and TCLP method were 997 μg g-1, 189 μg g-1, 20.8 μg g-1, and 54.0 μg g-1, respectively. Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma mass spectrometry (ICP-MS) were employed for lead determination according to the protocols of the applied methods. Lead contamination in used BKP was confirmed by scanning electron microscopy coupled with energy dispersive X-ray microanalysis (SEM-EDS). All the SEM imaging was carried out in the secondary electron mode (SE) and backscattered-electron mode (QBSD) following punctual X-ray fluorescence spectra. Soil contamination derived from this product revealed the urgent need of addressing this problem. These elevated Pb levels, show that a preliminary treatment of BKP is mandatory before it is disposed into the common trash. The high lead content of this material makes its direct dumping into the environment unwise.

  3. IDEFIX: identification of dental fixtures in intraoral x rays

    Science.gov (United States)

    Lehmann, Thomas M.; Schmitt, Walter; Horn, Harald; Hillen, Walter

    1996-04-01

    In dental implantology more than one hundred enossal implant systems are in use. Once embedded, the dental x-ray examination is the most important tool for determining implants' producer, name, and type. In this paper, we present a system for automatic detection and identification of dental fixtures in intraoral x rays (IDEFIX) combining common direct digital image acquisition techniques with specially designed image analysis. IDEFIX can process any digital radiograph (e.g. RVG, Sens-A-Ray, Schick, Sidexis, Digora) as well as digitized dental films. A reference database has been generated by precise measurement on the implant systems used so far (eight implants) including parameters like length, diameter, and cross section area. After binarization of the current digital x-ray image, a parameter set is extracted from each detected object applying mathematical morphology. All objects are classified using a simplified nearest neighbor method and the Euclidean distance metric. If the distance of the objects' parameter set to one of the reference sets is below a given threshold, name and type of the identified dental fixture are displayed on the screen. Otherwise, the actual object will be rejected as a no-implant. IDEFIX has been evaluated by processing various in-vitro acquired radiographs. Different implants were classified captured with identical conditions as well as acquired varying the angulation of the x-ray tube. It is shown that misangulations up to twenty degrees are tolerable preserving correct identification. Other image structures like teeth or fillings result in large distances to all reference parameter sets and, therefore, they are reliably recognized as non-implants.

  4. Use of the ICDAS system and two fluorescence-based intraoral devices for examination of occlusal surfaces

    NARCIS (Netherlands)

    A. Theocharopoulou; M.D. Lagerweij; A.J. van Strijp

    2015-01-01

    AIM: The aims of this study were to assess the inter-examiner reliability of ICDAS and Soprolife intra-oral camera ex vivo using 5 examiners and to compare in vivo the validity of two fluorescence-based intra-oral devices in examining occlusal surfaces with early carious lesions. MATERIALS AND METHO

  5. Development of an intraoral device for social inclusion of a physically disabled patient.

    Science.gov (United States)

    de Mesquita-Guimarães, Késsia Suênia Fidelis; Ferreira, Danielly Cunha Araújo; da Silva, Raquel Assed Bezerra; Díaz-Serrano, Kranya Victoria; de Queiroz, Alexandra Mussolino; Mantovani, Carolina Paes Torres; De Rossi, Andiara

    2016-01-01

    The aim of this study is to describe the use of an intraoral assistive technology for a patient with idiopathic generalized muscular dystonia, presenting temporomandibular disorder and severe anterior tooth mobility and diastema. A multidisciplinary team developed an intraoral device to provide typing and painting functions, and promote relaxation of masticatory muscles without compromising the teeth and supporting tissue structures. The occlusal splint associated with the device promoted muscle relaxation and relief of the signs and symptoms of temporomandibular dysfunction, in this case with generalized muscle dystonia, allowing typing and painting with her mouth without causing tooth mobility or occlusal alteration. This intraoral device has low cost, easy adaptation and was efficient in TMD symptoms. Furthermore, the patient returned to her rehabilitation allowing performance of her duties without compromising dental structures, facilitating the social and the digital inclusion.

  6. Development of an intraoral device for social inclusion of a physically disabled patient.

    Science.gov (United States)

    de Mesquita-Guimarães, Késsia Suênia Fidelis; Ferreira, Danielly Cunha Araújo; da Silva, Raquel Assed Bezerra; Díaz-Serrano, Kranya Victoria; de Queiroz, Alexandra Mussolino; Mantovani, Carolina Paes Torres; De Rossi, Andiara

    2016-01-01

    The aim of this study is to describe the use of an intraoral assistive technology for a patient with idiopathic generalized muscular dystonia, presenting temporomandibular disorder and severe anterior tooth mobility and diastema. A multidisciplinary team developed an intraoral device to provide typing and painting functions, and promote relaxation of masticatory muscles without compromising the teeth and supporting tissue structures. The occlusal splint associated with the device promoted muscle relaxation and relief of the signs and symptoms of temporomandibular dysfunction, in this case with generalized muscle dystonia, allowing typing and painting with her mouth without causing tooth mobility or occlusal alteration. This intraoral device has low cost, easy adaptation and was efficient in TMD symptoms. Furthermore, the patient returned to her rehabilitation allowing performance of her duties without compromising dental structures, facilitating the social and the digital inclusion. PMID:26578336

  7. Esclerosis sistémica complicada con síncope y bloqueo AV completo Systemic sclerosis complicated with syncope and complete AV block

    Directory of Open Access Journals (Sweden)

    Francisco Femenía

    2010-10-01

    Full Text Available La esclerosis sistémica es una compleja enfermedad que afecta el tejido conectivo, el sistema vascular y el sistema inmunológico, y se caracteriza por fibrosis cutánea y de órganos viscerales. Los bloqueos de rama y los hemibloqueos se presentan en el 25 a 75% de los casos y constituyen predictores independientes de mortalidad. Los bloqueos auriculoventriculares de segundo o tercer grado son muy raros. Presentamos el caso de una mujer de 47 años de edad, con diagnóstico de esclerosis sistémica, quien presenta episodio sincopal secundario a bloqueo auriculoventricular completo con necesidad de implante de marcapasos definitivo.Systemic sclerosis is a complex disease that affects the connective tissue, the vascular system and the immune system. It typically produces skin and organ fibrosis. Cardiac bundle branch blocks and fascicular blocks occur in 25-75% of the cases and were found to be independent predictors of mortality. Second and third degree atrioventricular block are very rare. We present the case of a 47 year-old female with diagnosis of systemic sclerosis, presented with syncope secondary to complete atrioventricular block requiring permanent pacemaker implantation.

  8. Bloqueo del ganglio estrellado y anestesia subaracnoidea: Caso Clínico Blockade of the inferior cervical ganglion with subarachnoid anesthesia: Clinical case

    Directory of Open Access Journals (Sweden)

    L. San Norberto

    2007-06-01

    Full Text Available El ganglio estrellado está formado por la unión del ganglio cervical inferior y el primer ganglio torácico. El bloqueo de dicho ganglio es usado para el diagnóstico y tratamiento de diversos síndromes dolorosos crónicos. Esta técnica con anestésicos locales suele ser segura aunque no exenta de complicaciones como convulsiones, neumotórax o anestesia espinal entre otras. Estas complicaciones pueden minimizarse con una adecuada vigilancia, monitorización y recursos adecuados. Para un correcto diagnóstico y tratamiento de las posibles complicaciones. Presentamos el caso de un bloqueo espinal completo tras la realización de un bloqueo del ganglio estrellado.The stellate ganglion refers to the ganglion formed by fusion of the inferior cervical and the first thoracic ganglion. Stellate ganglion blockade is a procedure mainly used for the diagnosis and treatment of chronic painful syndromes. This technique with local anesthetic is a safe procedure, his risk, though infrequent; include seizures, pneumothorax, spinal block and others. These complications can be minimized with adequate monitoring, surveillance and resources in order to diagnostic and treatment of complications. We present a case with spinal block following stellate ganglion blockade.

  9. Intraoral pH and temperature during sleep with and without mouth breathing.

    Science.gov (United States)

    Choi, J E; Waddell, J N; Lyons, K M; Kieser, J A

    2016-05-01

    To measure and compare the intraoral pH and temperature of individuals during sleep with and without mouth breathing. Ten healthy participants [mean age = 25·8 (± 4·3)] wore a custom-made appliance fitted with a pH probe and thermocouple for two sets of 48 h. Continuous pH and temperature measurements were taken from the palatal aspect of the upper central incisors. To simulate mouth breathing during sleep, participants wore a nose clip for two nights of the four, with the first group (n = 5) wearing the nose clip during the first night and the rest (n = 5) wearing the nose clip during the second night of sleep to balance any potential bias from the wearing sequence. Both qualitative and quantitative analyses were conducted. The mean intraoral pH during daytime was 7·3 (± 0·4) and during sleep was 7·0 (± 0·5). The mean intraoral pH during sleep with mouth breathing was 6·6 (± 0·5), which was statistically significant compared with the normal sleep condition (P mouth breathing, intraoral pH showed a greater fall over a longer period of time. The mean intraoral temperature was 33·1 °C (± 5·2) during daytime and 33·3 °C (± 6·1) during sleep, with no statistical significance between sleep with and without mouth breathing (P > 0·05). The results suggest that mouth breathing during sleep is related to a decrease in intraoral pH compared with normal breathing during sleep, and this has been proposed as a causal factor for dental erosion and caries.

  10. A PROSPECTIVE STUDY OF FINE NEEDLE ASPIRATION CYTOLOGY OF INTRAORAL LESIONS

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    Harish S

    2015-10-01

    Full Text Available Fine needle aspiration cytology (FNAC is an important diagnostic tool for swellings in the thyroid, salivary gland, breast lump and enlarged lymph nodes. Very few studies have been done to explore the potential of FNAC in the diagnoses of intraoral lesions. Hence the present study was done to find out the efficacy of FNAC in the diagnosis of intraoral lesions. AIMS/OBJECTIVES : To determine the efficacy of Fine Needle Aspiration Cytology in the diagnosis of intraoral lesions . MATERIALS & METHODS: A prospective study on 88 cases presented with intraoral lesions was done from August 2010 to July 2012. Cases of intraoral Cases having both FNACs along with biopsy correlation were included. OBSERVATIONS/RESULTS: The age group ranged from 12 - 83 years with male: female ratio of 1.6:1. The most common sites of aspiration were tongue in 28 cases, followed by buccal mucosa in 24 and other sites 42 cases. The lesions rep orted on FNAC were malignant tumors in 44(50%, benign lesions 39 (44.31% and suspicious for malignancy 5(5.69% cases. False negative and false positive were 6 and 2 cases respectively. Squamous cell carcinoma was the common malignant tumor. Overall sens itivity of 88%, specificity 95.6% and diagnostic accuracy of 91.6% was obtained in our study. CONCLUSION: We conclude that FNAC is one of the important diagnostic tool in the diagnosis of intraoral lesions. The results of our study suggest, it should be co nsidered as first line of investigation, especially in clinically suspected malignant tumors.

  11. Accuracy of Intraoral Digital Impressions for Whole Upper Jaws, Including Full Dentitions and Palatal Soft Tissues.

    Science.gov (United States)

    Gan, Ning; Xiong, Yaoyang; Jiao, Ting

    2016-01-01

    Intraoral digital impressions have been stated to meet the clinical requirements for some teeth-supported restorations, though fewer evidences were proposed for larger scanning range. The aim of this study was to compare the accuracy (trueness and precision) of intraoral digital impressions for whole upper jaws, including the full dentitions and palatal soft tissues, as well as to determine the effect of different palatal vault height or arch width on accuracy of intraoral digital impressions. Thirty-two volunteers were divided into three groups according to the palatal vault height or arch width. Each volunteer received three scans with TRIOS intraoral scanner and one conventional impression of whole upper jaw. Three-dimensional (3D) images digitized from conventional gypsum casts by a laboratory scanner were chose as the reference models. All datasets were imported to a specific software program for 3D analysis by "best fit alignment" and "3D compare" process. Color-coded deviation maps showed qualitative visualization of the deviations. For the digital impressions for palatal soft tissues, trueness was (130.54±33.95)μm and precision was (55.26±11.21)μm. For the digital impressions for upper full dentitions, trueness was (80.01±17.78)μm and precision was (59.52±11.29)μm. Larger deviations were found between intraoral digital impressions and conventional impressions in the areas of palatal soft tissues than that in the areas of full dentitions (p0.05), but arch width was found to have a significant effect on precision of intraoral digital impressions for full dentitions (p = 0.016). A linear correlation was found between arch width and precision of digital impressions for whole upper jaws (r = 0.326, p = 0.034 for palatal soft tissues and r = 0.485, p = 0.002 for full dentitions). It was feasible to use the intraoral scanner to obtain digital impressions for whole upper jaws. Wider dental arch contributed to lower precision of an intraoral digital

  12. Accuracy of Intraoral Digital Impressions for Whole Upper Jaws, Including Full Dentitions and Palatal Soft Tissues

    Science.gov (United States)

    Gan, Ning; Xiong, Yaoyang; Jiao, Ting

    2016-01-01

    Intraoral digital impressions have been stated to meet the clinical requirements for some teeth-supported restorations, though fewer evidences were proposed for larger scanning range. The aim of this study was to compare the accuracy (trueness and precision) of intraoral digital impressions for whole upper jaws, including the full dentitions and palatal soft tissues, as well as to determine the effect of different palatal vault height or arch width on accuracy of intraoral digital impressions. Thirty-two volunteers were divided into three groups according to the palatal vault height or arch width. Each volunteer received three scans with TRIOS intraoral scanner and one conventional impression of whole upper jaw. Three-dimensional (3D) images digitized from conventional gypsum casts by a laboratory scanner were chose as the reference models. All datasets were imported to a specific software program for 3D analysis by "best fit alignment" and "3D compare" process. Color-coded deviation maps showed qualitative visualization of the deviations. For the digital impressions for palatal soft tissues, trueness was (130.54±33.95)μm and precision was (55.26±11.21)μm. For the digital impressions for upper full dentitions, trueness was (80.01±17.78)μm and precision was (59.52±11.29)μm. Larger deviations were found between intraoral digital impressions and conventional impressions in the areas of palatal soft tissues than that in the areas of full dentitions (pdigital impressions for palatal soft tissues was slightly better than that for full dentitions (p = 0.049). There was no significant effect of palatal vault height on accuracy of digital impressions for palatal soft tissues (p>0.05), but arch width was found to have a significant effect on precision of intraoral digital impressions for full dentitions (p = 0.016). A linear correlation was found between arch width and precision of digital impressions for whole upper jaws (r = 0.326, p = 0.034 for palatal soft

  13. Bloqueo tricompartimental del hombro doloroso: estudio preliminar Tricompartmental blockade of painful shoulder: A preliminary study

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    D. Abejón

    2009-10-01

    Full Text Available Introducción: El hombro doloroso constituye una de las consultas más frecuentes en atención primaria, y afecta entre el 7 y el 34% de la población general adulta. La etiología más frecuente es la disfunción del manguito de los rotadores, que supone más del 70% de los casos, incluyendo aquí la tendinitis, la bursitis y la rotura de éste o de alguno de sus componentes. Se han postulado diversos tratamientos para el hombro doloroso. El objetivo del estudio es exponer una nueva técnica para los pacientes que son resistentes a los tratamientos convencionales. Material y métodos: Se analizó la eficacia de la técnica mediante una escala analógica visual (EVA que se pasó a los pacientes en el momento basal y al mes posterior a su realización. En el mismo período se valoró el grado de satisfacción de los pacientes y el porcentaje de mejoría de éstos. Por último, se analizaron las complicaciones, si existieron, y se preguntó a los pacientes si repetirían la técnica o no. Resultados: La técnica se realizó en 12 pacientes. La EVA basal media fue de 8,5 ± 1 y descendió a 5,5 ± 3 tras el procedimiento. Cuando se analizan los pacientes en los que se obtuvo beneficio, el descenso de la EVA fue cercano a 5 puntos con respecto al basal. Cuando se analizan estos datos se podría decir que en patología artrósica el valor de la técnica es mayor que en los pacientes en los que predomina la patología de partes blandas. El porcentaje medio de mejoría en la muestra completa fue de 45,83 ± 42,05. Los pacientes en los que se realizó la técnica, ante la pregunta de si repetirían o no la técnica, 7 repetirían frente a 5 que no lo harían. No se recogió ninguna complicación derivada del procedimiento. Conclusiones: El bloqueo tricompartimental del hombro parece una técnica prometedora en el tratamiento del hombro doloroso, principalmente en los casos en los que la patología subyacente es de origen artrósico.Introduction: Painful

  14. Negative Intraoral Air Pressures of Deaf Children with Cochlear Implants: Physiology, Phonology, and Treatment.

    Science.gov (United States)

    Higgins, Maureen B.; And Others

    1996-01-01

    A study of four children with deafness who had cochlear implants investigated the use of negative intraoral air pressure in articulation, from both the physiological and phonological perspectives. The study showed that the children used speech-production strategies that were different from hearing children and that deviant speech behaviors should…

  15. Intraoral distraction osteogenesis to lengthen the ascending ramus - Experience with seven patients

    NARCIS (Netherlands)

    Jansma, J; Bierman, MWJ; Becking, AG

    2004-01-01

    Seven children with facial asymmetry, mean age 12 years (range 11-14.5) were treated by intraoral distraction osteogenesis to lengthen the hypoplastic ramus. We achieved a mean increase in length of the ramus of 13 mm (range 10-16). In only one patient did we achieve a posterior open bite on the dis

  16. Comparison of Implant-Supported Crown Length Measured on Digitized Casts and Intraoral Radiographs

    NARCIS (Netherlands)

    Meijer, Henny J. A.; Telleman, Gerdien; Gareb, Chawan; Den Hartog, Laurens; Vissink, Arjan; Raghoebar, Gerry M.

    2012-01-01

    Correct measurement of crown length is important for calculating the crown-implant ratio. The aim of this study was to compare the length of implant-supported crowns measured on digitized casts and intraoral radiographs. Crown lengths were studied in 50 patients with 86 implant-supported crowns in t

  17. Influence of scanning strategies on the accuracy of digital intraoral scanning systems.

    Science.gov (United States)

    Ender, A; Mehl, A

    2013-01-01

    The digital intraoral impression is a central part in today's CAD/CAM dentistry. With its possibilities, new treatment options for the patient is provided and the prosthetic workflow is accelerated. Nowadays, the major issue with intraoral scanning systems is to gain more accuracy especially for larger scan areas and to simplify clinical handling for the dentist. The aim of this study was to investigate different scanning strategies regardingtheir accuracy with full arch scans in an in-vitro study design. A reference master model was used for the digital impressions with the Lava COS, the Cerec Bluecam and a powderfree intraoral scanning system, Cadent iTero. The trueness and precision of each scanning protocol was measured. Lava COS provides the a trueness of 45.8 microm with the scanning protocol recommended from the manufacturer. A different scanning protocol shows significantly lower accuracy (trueness +/- 90.2 microm). Cerec Bluecam also benefits from an optimal scanning protocol with a trueness of +/- 23.3 microm compared to +/- 52.5 microm with a standard protocol. The powderfree impression system Cadent iTero shows also a high accurate full-arch scan with a trueness of +/- 35.0 microm and a precision of +/- 30.9 microm. With the current intraoral scanning systems, full arch dental impressions are possible with a high accuracy, if adequate scan strategies are used. The powderfree scanning system provides the same level of accuracy compared to scanning systems with surface pretreatment. PMID:23641661

  18. Influence of scanning strategies on the accuracy of digital intraoral scanning systems.

    Science.gov (United States)

    Ender, A; Mehl, A

    2013-01-01

    The digital intraoral impression is a central part in today's CAD/CAM dentistry. With its possibilities, new treatment options for the patient is provided and the prosthetic workflow is accelerated. Nowadays, the major issue with intraoral scanning systems is to gain more accuracy especially for larger scan areas and to simplify clinical handling for the dentist. The aim of this study was to investigate different scanning strategies regardingtheir accuracy with full arch scans in an in-vitro study design. A reference master model was used for the digital impressions with the Lava COS, the Cerec Bluecam and a powderfree intraoral scanning system, Cadent iTero. The trueness and precision of each scanning protocol was measured. Lava COS provides the a trueness of 45.8 microm with the scanning protocol recommended from the manufacturer. A different scanning protocol shows significantly lower accuracy (trueness +/- 90.2 microm). Cerec Bluecam also benefits from an optimal scanning protocol with a trueness of +/- 23.3 microm compared to +/- 52.5 microm with a standard protocol. The powderfree impression system Cadent iTero shows also a high accurate full-arch scan with a trueness of +/- 35.0 microm and a precision of +/- 30.9 microm. With the current intraoral scanning systems, full arch dental impressions are possible with a high accuracy, if adequate scan strategies are used. The powderfree scanning system provides the same level of accuracy compared to scanning systems with surface pretreatment.

  19. Development of a computer simulation system of intraoral radiography using perspective volume rendering of CT data

    International Nuclear Information System (INIS)

    The purpose of this study was to evaluate the usefulness of a computer simulation system for intraoral radiography as an educational aid for radiographic training for dental students. A dried skull was scanned with a multidetector CT, and the series of slice data was transferred to a workstation. A software AVS Express Developer was used to construct the x-ray projected images from the CT slice data. Geometrical reproducibilities were confirmed using numerical phantoms. We simulated images using the perspective projection method with an average value algorithm on this software. Simulated images were compared with conventional film images projected from the same geometrical positions, including eccentric projection. Furthermore, to confirm the changes of the image depending on the projection angles of the x-ray beam, we constructed simulation images in which the root apexes were enhanced with the maximum value algorithm. Using this method, high resolution simulated images with perspective projection, as opposed to parallel, were constructed. Comparing with conventional film images, all major anatomic components could be visualized easily. Any intraoral radiographs at an arbitrary angular projection could be simulated, which was impossible in the conventional training schema for radiographic technique. Therefore, not only standard projected images but also eccentric projections could be displayed. A computer simulation system of intraoral radiography with this method may be useful for training in intraoral radiographic technique for dental students. (author)

  20. Fluoride and urea chewing gums in an intra-oral experimental caries model

    NARCIS (Netherlands)

    Sjogren, K; Ruben, J; Lingstrom, P; Lundberg, AB; Birkhed, D

    2002-01-01

    The aim of the present investigation was to evaluate the effect of sugar-free chewing gums containing fluoride (F) and urea in an intra-oral experimental caries model. Placebo chewing gums (without any active ingredient) and no gum served as controls. Fifteen subjects participated in a cross-over, s

  1. Validity of scoring caries and primary molar hypomineralization (DMH) on intraoral photographs

    NARCIS (Netherlands)

    M.E.C. Elfrink; J.S.J. Veerkamp; I.H.A. Aartman; H.A. Moll; J.M. ten Cate

    2009-01-01

    AIM: The aims of this study were to assess whether intraoral photographs could be used to score caries and hypomineralization on primary molars (Using adapted Molar Incisor Hypomineralization (MIH)-criteria), and also to assess the reliability and validity in 3-7 year-old Dutch children of these sco

  2. Radiografia intraoral e convencional da hemiarcada superior direita de gatos domésticos Intraoral and convencional radiography of the right maxilla hemiarcade of domestic cats

    Directory of Open Access Journals (Sweden)

    A.C. Nepomuceno

    2013-02-01

    Full Text Available A proposta com este trabalho foi avaliar a hemiarcada superior direita de gatos domésticos por meio de técnicas radiográficas odontológicas do paralelismo, empregando-se filmes intraorais aos posicionadores de Han Shin. As imagens obtidas por essa metodologia foram correlacionadas com as técnicas radiográficas convencionais (extraorais, com o intuito de se estabelecerem vantagens ou desvantagens para detectar possíveis afecções dentais e periodontais. Foram utilizados 30 gatos, sem raça definida, 17 machos e 13 fêmeas, faixa etária entre um e três anos, confinados em gatis do Departamento de Zootecnia da Universidade Federal de Lavras/MG. Com os animais sob anestesia geral, foram realizadas radiografias da hemiarcada superior direita, incluindo três incisivos, um canino, três pré-molares e um molar em radiografias intraorais e extraorais. As imagens radiográficas foram analisadas e efetuaram-se comparações qualitativas entre pares intraorais e convencionais dos mesmos animais. Para se estabelecer a técnica radiográfica dental mais bem adaptada, foram realizadas análises estatísticas pelo teste de McNemar (qui-quadrado modificado. A técnica intraoral mostrou ser superior à extraoral (PThe aim of this research was to evaluate the right maxilla hemiarcade of cats through parallel dental radiographic techniques, applying Han Shin intraoral film positioner. Images obtained with this method were correlated with conventional radiographic techniques (extraoral. The goal was to establish the advantages and disadvantages to detect possible dental and periodontal diseases. Thirty mixed breed cats were evaluated, 17 males and 13 females, ages one to three years old, confined in catteries in the Department of Zootecnia of the Federal University of Lavras/MG. Radiographies of the right maxilla were taken with the animals under general anesthesia, and three incisors, one canine, three premolars and one molar teeth were included in the

  3. Management of painful temporomandibular joint clicking with different intraoral devices and counseling: a controlled study

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    Paulo César Rodrigues CONTI

    2015-10-01

    Full Text Available Objective The benefit of the use of some intraoral devices in arthrogenous temporomandibular disorders (TMD patients is still unknown. This study assessed the effectiveness of the partial use of intraoral devices and counseling in the management of patients with disc displacement with reduction (DDWR and arthralgia.Materials and Methods A total of 60 DDWR and arthralgia patients were randomly divided into three groups: group I (n=20 wore anterior repositioning occlusal splints (ARS; group II (n=20 wore the Nociceptive Trigeminal Inhibition Clenching Suppression System devices (NTI-tss; and group III (n=20 only received counseling for behavioral changes and self-care (the control group. The first two groups also received counseling. Follow-ups were performed after 2 weeks, 6 weeks and 3 months. In these sessions, patients were evaluated by means of a visual analogue scale, pressure pain threshold (PPT of the temporomandibular joint (TMJ, maximum range of motion and TMJ sounds. Possible adverse effects were also recorded, such as discomfort while using the device and occlusal changes. The results were analyzed with ANOVA, Tukey’s and Fisher Exact Test, with a significance level of 5%.Results Groups I and II showed improvement in pain intensity at the first follow-up. This progress was recorded only after 3 months in Group III. Group II showed an increased in joint sounds frequency. The PPT values, mandibular range of motion and the number of occlusal contacts did not change significantly.Conclusion The simultaneous use of intraoral devices (partial time plus behavioral modifications seems to produce a more rapid pain improvement in patients with painful DDWR. The use of NTI-tss could increase TMJ sounds. Although intraoral devices with additional counseling should be considered for the management of painful DDWR, dentists should be aware of the possible side effects of the intraoral device’s design.

  4. Accuracy of intraoral and extraoral digital data acquisition for dental restorations

    Directory of Open Access Journals (Sweden)

    Heike Rudolph

    2016-02-01

    Full Text Available ABSTRACT The computer-aided design (CAD and computer-aided manufacturing (CAM process chain for dental restorations starts with taking an impression of the clinical situation. For this purpose, either extraoral digitization of gypsum models or intraoral digitization can be used. Despite the increasing use of dental digitizing systems, there are only few studies on their accuracy. Objective This study compared the accuracy of various intraoral and extraoral digitizing systems for dental CAD/CAM technology. Material and Methods An experimental setup for three-dimensional analysis based on 2 prepared ceramic master dies and their corresponding virtual CAD-models was used to assess the accuracy of 10 extraoral and 4 intraoral optical non-contact dental digitizing systems. Depending on the clinical procedure, 10 optical measurements of either 10 duplicate gypsum dies (extraoral digitizing or directly of the ceramic master dies (intraoral digitizing were made and compared with the corresponding CAD-models. Results The digitizing systems showed differences in accuracy. However, all topical systems were well within the benchmark of ±20 µm. These results apply to single tooth measurements. Conclusions Study results are limited, since only single teeth were used for comparison. The different preparations represent various angles and steep and parallel opposing tooth surfaces (incisors. For most digitizing systems, the latter are generally the most difficult to capture. Using CAD/CAM technologies, the preparation angles should not be too steep to reduce digitizing errors. Older systems might be limited to a certain height or taper of the prepared tooth, whereas newer systems (extraoral as well as intraoral digitization do not have these limitations.

  5. Accuracy of intraoral and extraoral digital data acquisition for dental restorations

    Science.gov (United States)

    Rudolph, Heike; Salmen, Harald; Moldan, Matthias; Kuhn, Katharina; Sichwardt, Viktor; Wöstmann, Bernd; Luthardt, Ralph Gunnar

    2016-01-01

    ABSTRACT The computer-aided design (CAD) and computer-aided manufacturing (CAM) process chain for dental restorations starts with taking an impression of the clinical situation. For this purpose, either extraoral digitization of gypsum models or intraoral digitization can be used. Despite the increasing use of dental digitizing systems, there are only few studies on their accuracy. Objective This study compared the accuracy of various intraoral and extraoral digitizing systems for dental CAD/CAM technology. Material and Methods An experimental setup for three-dimensional analysis based on 2 prepared ceramic master dies and their corresponding virtual CAD-models was used to assess the accuracy of 10 extraoral and 4 intraoral optical non-contact dental digitizing systems. Depending on the clinical procedure, 10 optical measurements of either 10 duplicate gypsum dies (extraoral digitizing) or directly of the ceramic master dies (intraoral digitizing) were made and compared with the corresponding CAD-models. Results The digitizing systems showed differences in accuracy. However, all topical systems were well within the benchmark of ±20 µm. These results apply to single tooth measurements. Conclusions Study results are limited, since only single teeth were used for comparison. The different preparations represent various angles and steep and parallel opposing tooth surfaces (incisors). For most digitizing systems, the latter are generally the most difficult to capture. Using CAD/CAM technologies, the preparation angles should not be too steep to reduce digitizing errors. Older systems might be limited to a certain height or taper of the prepared tooth, whereas newer systems (extraoral as well as intraoral digitization) do not have these limitations. PMID:27008261

  6. Evaluación del efecto de bloqueo en el condicionamiento clásico de preferencias

    Directory of Open Access Journals (Sweden)

    César A. Contreras-Bejarano

    2011-02-01

    Full Text Available Esta investigación experimental tuvo como objetivo poner a prueba el efecto de bloqueode Kamin en el condicionamiento clásico de preferencias. Se diseñaron tres partes: Estudio1, Experimento 1 y Experimento 2. El Estudio preliminar (n = 54 consistió en laelección de los estímulos condicionados (marcas publicitarias ficticias y del estímulo incondicionado(figura femenina con una proporción controlada de la medida de cintura/cadera. En el Experimento 1 (n = 60 se efectuó el entrenamiento en condicionamientoclásico de preferencias. Finalmente, en el Experimento 2 (n = 40, se examinó el efecto debloqueo en el condicionamiento clásico de preferencias con pruebas de tipo cognoscitivoy afectivo. Participaron estudiantes universitarios de diferentes carreras entre 17 y 25años. Los resultados indican que se manifestó un efecto de bloqueo en tres de las cuatropruebas utilizadas para evaluar dicho fenómeno. Se plantea, a manera de conclusión,que este efecto potencialmente explica diferentes fenómenos en los campos de la publicidady el mercadeo, especialmente en lo que concierne a competencia de marcas.

  7. Bloqueo caudal en dolor crónico lumbar: ¿Es necesario el apoyo radiológico para disminuir los fallos de la técnica?

    Directory of Open Access Journals (Sweden)

    M. Cortiñas Sáenz

    2012-08-01

    Full Text Available Introducción: las infiltraciones de esteroides epidurales no ofrecen beneficio a largo plazo en el tratamiento del dolor de espalda, pero pueden ser eficaces en los pacientes con dolor radicular lumbosacro agudo. Los bloqueos epidurales vía caudal de esteroides son eficaces en el alivio sintomático a corto plazo (evidencia de nivel II, así como a largo plazo (nivel de evidencia III. Objetivos: evaluar la eficacia del bloqueo caudal con y sin guía fluoroscópica. Material y métodos: estudio prospectivo, observacional y descriptivo para evaluar la tasa de fallos de la realización del bloqueo caudal mediante la técnica "a ciegas" respecto a la guiada por radiología. El análisis estadístico incluyó chi2 de Mantel y Haensel, t de Student y test ANOVA, considerándose una p < 0,05 con significación estadística. Resultados: se realizaron 129 bloqueos epidurales caudales en 89 pacientes por cuadros de dolor crónico. La tasa global de éxito del bloqueo caudal con la técnica a ciegas fue de un 65,11%. Existen diferencias estadísticamente significativas en la tasa de fallos de la técnica a ciegas para las variables: experiencia profesional del médico anestesiólogo y la presencia de obesidad. La mal posición más frecuente en nuestra cohorte es la colocación subcutánea de la aguja, que representa un 80% de los casos (36/45. Conclusiones: recomendamos el uso de la visión radiológica para realizar los bloqueos epidurales caudales.

  8. Calidad de vida de pacientes con cáncer de próstata en tratamiento con bloqueo androgénico continuo vs intermitente: estudio prospectivo mediante la aplicación del cuestionario CAVIPRES

    OpenAIRE

    C.R. Sierra Labarta; D. Sánchez Zalabardo; Á. de Pablo Cárdenas

    2015-01-01

    Fundamento: El tratamiento con bloqueo androgénico intermitente (BAI) pretende mejorar la calidad de vida de los pacientes con cáncer de próstata con los mismos resultados oncológicos que el bloqueo androgénico continuo (BAC). El presente trabajo compara la calidad de vida mediante la aplicación del cuestionario CAVIPRES entre dos grupos de pacientes, uno tratado con BAC y otro con BAI. Material y métodos: Se realizó un estudio longitudinal de 24 meses de duración que incluyó 114 pacientes. T...

  9. Analgesia continua de miembro superior por bloqueo de plexo braquial en dolor crónico oncológico Continuous analgesia of the upper limb with brachial plexus blockade in chronic cancer pain

    OpenAIRE

    M. Narváez; K. Glasinovic; A. Condori; A. Ballon; M. Torres

    2005-01-01

    Objetivo: Evaluar la utilizdad del bloqueo del plexo braquial en el tratamiento del dolor intenso oncológico. Método: Evaluamos en 6 pacientes con metástasis óseas del miembro superior la efectividad de un bloqueo continuo del plexo braquial. Resultados: Todos los pacientes del estudio tuvieron una evolución favorable y un incremento en la analgesia con el tratamiento sin que se produjeran efectos adversos. Conclusiones: La analgesia continua del plexo braquial es un método efectivo para el c...

  10. Bloqueo aurículo-ventricular de primer grado en tirotoxicosis aguda First degree atrio-ventricular block in acute thyrotoxicosis

    OpenAIRE

    Antonio R. Vilches; Jorge Lerman

    2004-01-01

    El cuadro clínico de la tirotoxicosis incluye síntomas cardiovasculares variados. La taquicardia sinusal es el trastorno electrocardiográfico más frecuente y los trastornos de conducción son extremadamente raros como modo de presentación. Comunicamos un caso de bloqueo aurículo-ventricular de primer grado en una paciente con hipertiroidismo recién diagnosticado y que comenzó días antes de la consulta con un cuadro general inespecífico. Su evaluación ulterior demostró que se trataba de una tir...

  11. Propuesta de procedimientos para mejorar los resultados obtenidos por la heurística NEH en el problema flow shop con bloqueos

    OpenAIRE

    Companys Pascual, Ramón; Ribas Vila, Immaculada; Mateo Doll, Manuel

    2010-01-01

    En este trabajo se han analizado formas de incrementar la calidad de las soluciones obtenidas por la heurística NEH al aplicarla al problema de programación de piezas en un sistema flow shop con bloqueos con el objetivo de minimizar el makespan. Los resultados obtenidos al analizar diferentes métodos indican que es aconsejable aplicar el procedimiento sobre el ejemplar directo e inverso reteniendo la mejor de las dos soluciones obtenidas así como substituir la regla de ordenación LPT por la M...

  12. Modificación de los criterios de Sgarbossa para el diagnóstico de infarto agudo de miocardio en presencia de bloqueo de rama izquierda

    Directory of Open Access Journals (Sweden)

    Nelson Leandro Moreno-Ruiz

    2015-01-01

    Full Text Available Un bloqueo de rama izquierda dificulta el diagnóstico de infarto agudo de miocardio. Los criterios de Sgarbossa, mencionados en las guías de manejo de las diferentes sociedades científicas, son útiles pero con limitaciones bien reconocidas. Recientemente, se ha publicado una modificación a estos criterios que puede mejorar su rendimiento diagnóstico, y así ser parte de un algoritmo de manejo para los pacientes; aunque, hasta el momento, hacen falta estudios para validar lo anterior.

  13. Bloqueo del ganglio estrellado y anestesia subaracnoidea: Caso Clínico Blockade of the inferior cervical ganglion with subarachnoid anesthesia: Clinical case

    OpenAIRE

    L. San Norberto; F. Hernández-Zaballos; Santos, J.; F. J. Sánchez-Montero; Vaquero, M.; E. Sánchez-Barrado; Muriel, C.

    2007-01-01

    El ganglio estrellado está formado por la unión del ganglio cervical inferior y el primer ganglio torácico. El bloqueo de dicho ganglio es usado para el diagnóstico y tratamiento de diversos síndromes dolorosos crónicos. Esta técnica con anestésicos locales suele ser segura aunque no exenta de complicaciones como convulsiones, neumotórax o anestesia espinal entre otras. Estas complicaciones pueden minimizarse con una adecuada vigilancia, monitorización y recursos adecuados. Para un correcto d...

  14. Patrón visual de jugadoras experimentadas de voleibol durante la acción del bloqueo

    Directory of Open Access Journals (Sweden)

    Sara Vila-Maldonado

    2015-01-01

    Full Text Available El objetivo del presente estudio fue analizar el com- portamiento visual de las jugadoras de voleibol en una situación de bloqueo basándose en la figura de la colo- cadora. La muestra quedó compuesta por 29 jugadoras de voleibol (23.10 ± 3.74 años que competían de mane- ra federada. Se analizó el comportamiento visual de las jugadoras utilizando secuencias de vídeo proyectadas a tamaño real. Las participantes visionaron el mismo número de colocaciones, realizadas por dos jugadoras distintas, de su mismo nivel competitivo. Dentro del comportamiento visual se analizó la duración, núme- ro y orden de las fijaciones visuales, y los movimientos sacádicos. El número medio de fijaciones de las parti- cipantes fue de 3.61, con una duración media de 3.56 s. Encontramos un patrón en el comportamiento visual de las participantes del estudio basado en sus fijaciones visuales. Inicialmente las participantes utilizaban la vi- sión periférica para detectar diferentes estímulos de la escena y posteriormente su tendencia fue a utilizar la visión fóvea centrándose en distintas zonas concretas. Las zonas más fijadas por las participantes, de las cua- les extraen la información para su toma de decisiones, son fondo (FD y codo-muñeca (CM en primer lugar, seguidas de cabeza (CB, balón (BA, hombro-codo (HC, balón-muñeca (BM y tronco (TR.

  15. Microscopic and immunohistochemical analysis of the skin changes of free forearm flaps in intraoral reconstruction.

    Science.gov (United States)

    Rubino, Corrado; Dessy, Luca A; Farace, Francesco; Ena, Pasquale; Mazzarello, Vittorio

    2002-10-01

    In the literature, few studies based on clinical and histological evaluation analyze skin structural changes after transplantation to the oral cavity. Ten patients affected by squamous cell carcinoma of the oral cavity who were reconstructed with a free forearm flap were included in the current study to analyze skin alterations. The authors performed a histological and ultrastructural evaluation of skin samples from the free forearm flap before transplantation and 18 months after intraoral reconstruction. They analyzed cytokeratin and involucrin distribution, which represent markers of maturation and differentiation of epithelia. The aim of this study was to demonstrate whether skin "mucosalization" occurs. They found that the skin undergoes some morphological changes induced by the intraoral environment. Cytokeratin and involucrin distribution is mostly unchanged. This aspect is in favor of skin structure preservation. Thus, they found that "mucosalization" of the skin is not evident after 18 months. PMID:12370640

  16. Intraoral dental radiography: experimental study and clinical use in two horses and a llama

    International Nuclear Information System (INIS)

    A technique for intraoral radiography of the maxillary cheek teeth in large animals using strips of nonscreen and commercial dental x-ray film is described. The method was initially tested using horse cadaver heads and subsequently on three large animal patients with signs of dental disease. Limitations of the described technique include necessity for general anesthesia, special x-ray film and manual developing. Additionally, the need for very accurate adjustment of incident beam angle, beam centering point and depth in the oral cavity provide a major technical challenge. After becoming famillar with the technique, the major limitation was increased time for manual film developing. The images provided by nonscreen technique were subjectively superior. The anatomic detail of the apical and periodontal regions of the teeth was better than on survey radiographs. Nonscreen intraoral technique should be considered for anesthetized large animal patients with signs of dental disease

  17. Co-occurrence of intraoral hemangioma and port wine stain: A rare case

    Directory of Open Access Journals (Sweden)

    Prasanna Kumar Rao

    2012-01-01

    Full Text Available Hemangiomas are neoplastic proliferations of endothelial cells, characterized by a period of growth after birth, and eventual spontaneous involution. The course can be uneventful with spontaneous resolution; or it may be marked by complications such as infection, bleeding, ulceration, visual defects and feeding difficulties. Apart from these, rare life-threatening complications such as congestive heart failure and consumption coagulopathy may also be seen. Although hemangiomas commonly occur in the head and neck region, intraoral occurrence is relatively rare. A port wine stain is defined as a macular telangiectatic patch which is present at birth and remains throughout life. They may be localized or extensive, affecting a whole limb. This article reports a rare case of co-occurrence of port wine stain with intraoral hemangioma.

  18. Intraoral Digital Impressions for Virtual Occlusal Records: Section Quantity and Dimensions

    Science.gov (United States)

    Solaberrieta, Eneko; Garmendia, Asier; Brizuela, Aritza; Otegi, Jose Ramon; Pradies, Guillermo; Szentpétery, Andras

    2016-01-01

    The purpose of this study was to locate the 3D spatial position mandibular cast and determine its occlusal contacts in a novel way by using an intraoral scanner as part of the virtual occlusal record procedure. This study also analyzes the requirements in quantity and dimensions of the intraoral virtual occlusal record. The results showed that the best section combination consists of 2 lateral and frontal sections, the width of this section being that of 2 teeth (24 mm × 15 mm). This study concluded that this procedure was accurate enough to locate the mandibular cast on a virtual articulator. However, at least 2 sections of the virtual occlusal records were necessary, and the best results were obtained when the distance between these sections was maximum. PMID:26881226

  19. Bloqueo interescalénico ecoguiado: ventajas en pediatría Ultrasound-guided interscalenic block: advantages in pediatrics

    Directory of Open Access Journals (Sweden)

    E. Segura Grau

    2009-02-01

    Full Text Available La anestesia locorregional es uno de los mejores métodos para el control y manejo del dolor intra y postoperatorio. En el paciente pediátrico este tipo de analgesia normalmente se realiza junto con anestesia general o sedación profunda, por la escasa o nula colaboración de los niños. Para la cirugía de hombro y antebrazo uno de los bloqueos periféricos más eficaces es el del plexo braquial por abordaje interescalénico, considerando siempre su elevada incidencia de complicaciones como la parálisis frénica ipsolateral, entre otras. Presentamos el caso de un niño de 13 años de edad propuesto para injerto de húmero de cadáver en miembro superior derecho. Un año antes se realizó resección de tumor refiriéndose un mal manejo del dolor postoperatorio con mórficos en PCA. Como técnica anestésica se realizó una anestesia general y, posteriormente, un bloqueo del plexo braquial por vía interescalénica con ecografía y neuroestimulador, y posterior colocación de catéter para analgesia en el postoperatorio. Se administraron 10 ml de levobupivacaína al 0,5%, sin necesidad de más analgésicos suplementares durante las 6 h que duró la intervención quirúrgica. Al finalizar la cirugía el paciente fue extubado en quirófano objetivando ausencia de dolor, síndrome de Horner y parálisis diafragmática izquierda sin repercusión clínica. Durante las 24 h siguientes se administraron 10 ml/h de ropivacaína al 0,25% a través del catéter, y así se consiguió una analgesia excelente y sin necesidad de bolos a demanda de anestésico local. En conclusión, la anestesia locorregional aporta una adecuada analgesia peri y postoperatoria, disminuyendo la necesidad de analgésicos adyuvantes. La utilización de la ecografía en la realización del bloqueo interescalénico permite no sólo una disminución de las dosis necesarias de anestésico local, sino también una visualización directa en la zona de administración, por lo que podr

  20. Bloqueio seletivo dos nervos supraescapular e axilar promove analgesia satisfatória e menor grau de bloqueio motor: comparação com o bloqueio interescalênico El bloqueo selectivo de los nervios supraescapular y axilar promueve una analgesia satisfactoria y un menor grado de bloqueo motor: comparación con el bloqueo interescalénico Selective suprascapular and axillary nerve block provides adequate analgesia and minimal motor block: comparison with interscalene block

    Directory of Open Access Journals (Sweden)

    Patrícia Falcão Pitombo

    2013-02-01

    . El objetivo de este estudio fue comparar el bloqueo de los nervios supraescapular y axilar en las cirugías artroscópicas de hombro con el abordaje interescalénico del plexo braquial. MÉTODO: Sesenta y ocho pacientes fueron ubicados en dos grupos de 34, de acuerdo con la técnica utilizada: grupo Interescalénico (GI y grupo selectivo (GS, siendo ambos abordajes realizados con neuroestimulador. En el GI, y después de la respuesta motora adecuada, se inyectaron 30 mL de levopubivacaina en exceso enantiomérico de un 50% al 0,33% con adrenalina 1:200.000. En el GS, y después de la respuesta motora del nervio supraescapular y axilar, se inyectaron 15 mL de la misma sustancia en cada nervio. Enseguida se realizó la anestesia general. Las variables que se evaluaron fueron: tiempo para la realización de los bloqueos, analgesia, consumo de opioide, bloqueo motor, estabilidad cardiocirculatoria, satisfacción y aceptabilidad por parte del paciente. RESULTADOS: El tiempo para la ejecución del bloqueo interescalénico fue significativamente menor que para la realización del bloqueo selectivo. La analgesia fue significativamente mayor en el postoperatorio inmediato en el GI y en el postoperatorio tardío en el GS. El consumo de morfina fue significativamente mayor en la primera hora en el GS. El bloqueo motor fue significativamente menor en el GS. La estabilidad cardiocirculatoria, satisfacción y aceptabilidad de la técnica por el paciente no fueron diferentes entre los grupos. Ocurrió un fallo en el GI y dos en el GS. CONCLUSIONES: Ambas técnicas son seguras y eficaces con el mismo grado de satisfacción y de aceptabilidad. El bloqueo selectivo de ambos nervios presentó una analgesia satisfactoria, con la ventaja de proporcionar un bloqueo motor restringido al hombro.BACKGROUND AND OBJECTIVE: Shoulder arthroscopic surgeries evolve with intense postoperative pain. Several analgesic techniques have been advocated. The aim of this study was to compare suprascapular

  1. Effect of laser pointer on students\\\\\\' levels of technical errors during intraoral radiographs

    OpenAIRE

    Farshid Shams; Fahime Sadat Sanaei; Nasim Azizi; Ali Peymani; Zeinab Davoudmanesh

    2015-01-01

    Background and Aims: According to concerns of technical errors in intraoral radiographs and reports of positive effects of central ray laser pointer on the students, technical errors and shortcomings of earlier research, this study was conducted at Department of Oral and Maxillofacial Radiology of Tehran Azad University to determine the role and use of laser pointer in the technical error made by students. Materials and Methods: This clinical trials study was carried out at the Department...

  2. Can subglottal pressure be estimated from intra-oral pressure in speech and singing ?

    OpenAIRE

    Henrich, Nathalie; Lagier, Aude; Amy De La Bretèque, Benoit; Giovanni, Antoine

    2012-01-01

    International audience The direct measurement of subglottal pressure is challenging, because it requires a very invasive approach. It consists in placing a pressure transducer below the glottis by tracheal puncture between the cricoïd cartilage and the trachea first ring. Other methods have been proposed, which estimate the subglottal pressure using less invasive approaches. The most common one is to estimate subglottal pressure from intra-oral pressure measured during the closed phase of ...

  3. Intraoral Superficial Angiomyxoma of the Upper Alveolus: Report of a Unique Case

    Directory of Open Access Journals (Sweden)

    Ravindra S. V.

    2012-01-01

    Full Text Available Angiomyxomas are relatively a group of uncommon myxoid mesenchymal tumors characterized by frequent local recurrences and show lack of malignant potential. Basically three types of angiomyxomas are recognized superficial, aggressive, and angiomyofibroblastoma. Though the angiomyxomas are rarely reported in the head and neck region, the paper shows reported cases intraorally in the buccal mucosa and floor of the mouth. Here, the authors report a rare case of angiomyxoma presenting as a growth in the upper posterior alveolar mucosa.

  4. Endoscope-assisted conservative condylectomy in the treatment of condylar osteochondroma through an intraoral approach.

    Science.gov (United States)

    Yu, H B; Sun, H; Li, B; Zhao, Z L; Zhang, L; Shen, S G; Wang, X D

    2013-12-01

    Mandibular condylar osteochondroma (OC) can result in morphological and functional disturbances, including facial asymmetry and temporomandibular joint (TMJ) dysfunction. The aim of this study was to explore the feasibility of endoscope-assisted tumour resection and conservative condylectomy via an intraoral approach. Seven patients with condylar OC were enrolled in this study. Endoscope-assisted tumour resection and conservative condylectomy were achieved intraorally, and no conventional extraoral incision was needed. Direct vision of the magnified and illuminated operative field was realized with the assistance of an endoscope. No facial nerve injury or salivary fistula occurred in any patient. Stable occlusion was realized through postoperative orthodontic treatment. The patients showed no signs of tumour recurrence or TMJ ankylosis during follow-up (range 18-43 months). Endoscope-assisted condylar OC resection and conservative condylectomy via intraoral approach offers great advantages with no significant complications compared with conventional extraoral incisions. The endoscope provides us with a valuable treatment option for this potentially complicated procedure. PMID:23790807

  5. Intra-oral adsorption and release of aroma compounds following in-mouth wine exposure.

    Science.gov (United States)

    Esteban-Fernández, Adelaida; Rocha-Alcubilla, Nuria; Muñoz-González, Carolina; Moreno-Arribas, María Victoria; Pozo-Bayón, María Ángeles

    2016-08-15

    Wine "after-odour" defined as the long lasting aroma perception that remains after wine swallowing is an outstanding characteristic in terms of wine quality but a relatively unstudied phenomenon. Among the different parameters that might affect wine after-odour, the adsorption of odorants by the oral mucosa could be important but has been little explored. In this work, the impact of the chemical characteristics of aroma compounds on intra-oral adsorption was assessed by an in vivo approach that determined the amounts of odorants remaining in expectorated wine samples. In addition, the subsequent aroma release after in-mouth wine exposure was studied by means of intra-oral SPME/GC-MS using three different panellists. Oral adsorption of the aroma compounds added to the wines ranged from 6% to 43%, depending on their physicochemical characteristics. A progressive intra-oral aroma decrease at different decay rates depending on compound type and panellist was also found. The strength of the aroma-oral mucosa interactions seems to explain these results more than the amount of compound adsorbed by the oral mucosa. PMID:27006241

  6. An analysis of the physiologic parameters of intraoral wear: a review

    International Nuclear Information System (INIS)

    This paper reviews the conditions of in vivo mastication and describes a novel method of measuring in vitro wear. Methods: parameters of intraoral wear are reviewed in this analysis, including chewing force, tooth sliding distance, food abrasivity, saliva lubrication, and antagonist properties. Results: clinical measurement of mastication forces indicates a range of normal forces between 20 and 140 N for a single molar. During the sliding phase of mastication, horizontal movement has been measured between 0.9 and 2.86 mm. In vivo wear occurs by three-body abrasion when food particles are interposed between teeth and by two-body abrasion after food clearance. Analysis of food particles used in wear testing reveals that food particles are softer than enamel and large enough to separate enamel and restoration surfaces and act as a solid lubricant. In two-body wear, saliva acts as a boundary lubricant with a viscosity of 3 cP. Enamel is the most relevant antagonist material for wear testing. The shape of a palatal cusp has been estimated as a 0.6 mm diameter ball and the hardest region of a tooth is its enamel surface. pH values and temperatures have been shown to range between 2–7 and 5–55 °C in intraoral fluids, respectively. These intraoral parameters have been used to modify the Alabama wear testing method. (paper)

  7. A portable intra-oral scanner based on sinusoidal pattern of fast phase-shifting

    Science.gov (United States)

    Jan, Chia-Ming; Lin, Ying-Chieh

    2016-03-01

    This paper presented our current research about the intra-oral scanner made by MIRDC. Utilizing the sinusoidal pattern for fast phase-shifting technique to deal with 3D digitalization of human dental surface profile, the development of pseudo-phase shifting digital projection can easily achieve one type of full-field scanning instead of the common technique of the laser line scanning. Based on traditional Moiré method, we adopt projecting fringes and retrieve phase reconstruction to forward phase unwrapping. The phase difference between the plane and object can be exactly calculated from the desired fringe images, and the surface profile of object was probably reconstructed by using the phase differences information directly. According to our algorithm of space mapping between projections and capturing orientation exchange of our intra-oral scanning configuration, the system we made certainly can be proved to achieve the required accuracy of +/-10μm to deal with intra-oral scanning on the basis of utilizing active triangulation method. The final purpose aimed to the scanning of object surface profile with its size about 10x10x10mm3.

  8. Accuracy of intraoral data acquisition in comparison to the conventional impression.

    Science.gov (United States)

    Luthardt, R G; Loos, R; Quaas, S

    2005-10-01

    The achievable accuracy is a decisive parameter for the comparison of direct intraoral digitization with the conventional impression. The objective of the study was therefore to compare the accuracy of the reproduction of a model situation by intraoral digitization vs. the conventional procedure consisting of impression taking, model production, and extraoral digitization. Proceeding from a die model with a prepared tooth 16, the reference data set of the teeth 15, 16 and 17 was produced with an established procedure by means ofextraoral digitization. For the simulated intraoral data acquisition of the master model (Cerec 3D camera, Sirona, Bensheim), the camera was fastened on a stand for the measurement and the teeth digitized seven times each in defined views (occlusal, and in each case inclined by 20 degrees, from the mesio-proximal, disto-proximal, vestibular and oral aspect). Matching was automated (comparative data sets B1-B5). A clinically perfect one-step putty-and-wash impression was taken from the starting model. The model produced under defined conditions was digitized extraorally five times (digi-SCAN, comparative data sets C1-C5). The data sets B1-B5 and C1-C5 were assigned to the reference data set by means of best-fit matching and the root of the mean quadratic deviation (RMS; root mean square) calculated. The deviations were visualized, and mean positive, negative and absolute deviations calculated. The mean RMS was 27.9 microm (B1-B5) or 18.8 microm (C1-C5). The mean deviations for the prepared tooth were 18 microm/-17 microm (B1-B5) and 9 microm /-9 microm (C1-C5). For tooth 15, the mean deviations were 22 microm/-19 microm (B1-B5) and 15 microm/-16 microm (C1-C5). The intraoral method showed good results with deviations from the CAD starting model of approx. 17 microm, related to the prepared tooth 16. On the whole, in this in-vitro study, extraoral digitization with impression taking and model production showed higher accuracy than intraoral

  9. Variation of plate fixation for mandibular advancement with intraoral vertical ramus osteotomy using endoscopically assisted intraoral rigid or semi-rigid internal fixation: Case series study: Postoperative condylar seating control for mandibular advancement.

    Science.gov (United States)

    Hara, Shingo; Mitsugi, Masaharu; Tatemoto, Yukihiro

    2015-12-01

    The purpose of the present study was to evaluate the safety and efficacy associated with mandibular advancement by intraoral vertical ramus osteotomy (IVRO) with endoscopically assisted intraoral rigid or semi-rigid internal fixation. The study sample included all patients who had undergone an mandibular advancement by IVRO procedure with endoscopically assisted intraoral plate fixation from September 2008 to May 2012. An mandibular advancement by IVRO with endoscopically assisted intraoral rigid or semi-rigid internal fixation was used for mandibular advancement. The patients were analyzed prospectively, with more than 2 years of follow-up, and were evaluated in terms of functional results, postoperative complications, and skeletal stability. A total of 14 patients (bilateral, 7 patients with class II; unilateral, 7 patients with asymmetry) were included in the present study. The average degree of mandibular advancement was 5.5 ± 1.9 mm (range, 3-9 mm). Both the occlusal relationship and facial appearance in all patients were significantly improved by the surgical-orthodontic treatment, with no major harmful clinical symptoms. In addition, one-screw semi-rigid fixation could control postoperative passive condylar seating. This study showed that mandibular advancement by IVRO with endoscopically assisted, intraoral semi-rigid internal fixation offers a promising treatment alternative for patients with skeletal class II malocclusion or facial asymmetry. PMID:26610634

  10. Bloqueos diagnóstico-terapéuticos de carillas articulares cervicales Diagnostic-therapeutic cervical facet joint blocks

    Directory of Open Access Journals (Sweden)

    M.L. Franco

    2009-03-01

    Full Text Available El 66% de los adultos experimenta dolor cervical a lo largo de su vida y el 54% lo ha experimentado durante los pasados 6 meses. Sólo el 5% presentará dolor crónico intenso acompañado de incapacidad funcional. El 80% del dolor cervical se produce por lesiones óseas o musculares como consecuencia de la degeneración discal y facetaria, a lo que se pueden sumar agentes externos, como traumatismo, sobrepeso, sobrecargas laborales, estrés, etc. El diagnóstico del dolor cervical se basa, fundamentalmente, en la exploración física y en la clínica del paciente. Ante la presencia de dolor cervical irradiado a nuca, cintura escapulohumeral y miembro superior derecho sin patrón radicular con exploración positiva en carillas articulares, están indicados los bloqueos diagnóstico-terapéuticos de éstas. En el trabajo se describe la anatomía de la región cervical, cuyo conocimiento es imprescindible tanto para garantizar los buenos resultados, como para minimizar los riesgos, así como las indicaciones y práctica de la técnica.Cervical pain is experienced by 66% of adults during their lifetime and by 54% in the previous 6 months. Only 5% will experience intense chronic pain with functional disability. Eighty percent of cervical pain is produced by skeletal or muscular lesions as a result of disc and facet degeneration. External causative agents include trauma, overweight, occupational demands, stress, etc. Diagnosis of cervical pain is mainly based on physical examination and clinical findings. In cervical pain radiating to the neck, scapulohumeral girdle and upper right arm without a radicular pattern and positive examination of the facet joints, diagnostic-therapeutic facet joint blocks are indicated. The present article describes the anatomy of the cervical region. Knowledge of this region is essential to guarantee good results and to minimize risks. The indications and practical features of the technique are also discussed.

  11. X-ray digital intra-oral tomosynthesis for quasi-three-dimensional imaging: system, reconstruction algorithm, and experiments

    Science.gov (United States)

    Li, Liang; Chen, Zhiqiang; Zhao, Ziran; Wu, Dufan

    2013-01-01

    At present, there are mainly three x-ray imaging modalities for dental clinical diagnosis: radiography, panorama and computed tomography (CT). We develop a new x-ray digital intra-oral tomosynthesis (IDT) system for quasi-three-dimensional dental imaging which can be seen as an intermediate modality between traditional radiography and CT. In addition to normal x-ray tube and digital sensor used in intra-oral radiography, IDT has a specially designed mechanical device to complete the tomosynthesis data acquisition. During the scanning, the measurement geometry is such that the sensor is stationary inside the patient's mouth and the x-ray tube moves along an arc trajectory with respect to the intra-oral sensor. Therefore, the projection geometry can be obtained without any other reference objects, which makes it be easily accepted in clinical applications. We also present a compressed sensing-based iterative reconstruction algorithm for this kind of intra-oral tomosynthesis. Finally, simulation and experiment were both carried out to evaluate this intra-oral imaging modality and algorithm. The results show that IDT has its potentiality to become a new tool for dental clinical diagnosis.

  12. Bloqueos nerviosos periféricos de la extremidad inferior para analgesia postoperatoria y tratamiento del dolor crónico Lower limb continuous peripheral nerve blocks for postoperative analgesia and chronic pain

    Directory of Open Access Journals (Sweden)

    V. Domingo

    2004-05-01

    Full Text Available Existe un interés creciente por la realización de los bloqueos de nervio periférico (BNP debido a sus potenciales beneficios como los concernientes a las interacciones de los fármacos anticoagulantes y los bloqueos neuroaxiales. Los BNP de la extremidad inferior, y sobre todo, los bloqueos periféricos del nervio ciático son el pariente pobre de las técnicas de anestesia regional y, en general, son poco conocidos y por tanto poco utilizados. En este artículo se realiza una revisión de los bloqueos del plexo lumbosacro, realizando especial énfasis en los bloqueos continuos mediante catéteres para analgesia postoperatoria y para el tratamiento del dolor crónico. La utilización de anestésicos locales de larga duración de acción, asociada a un escaso bloqueo motor, como es el caso de la ropivacaína, nos permite combinar técnicas de punción única para conseguir una adecuada analgesia intraoperatoria, con las técnicas de perfusión continua para analgesia postoperatoria. Es necesario un conocimiento anatómico preciso, así como de los territorios cutáneos de inervación de las ramas del plexo lumbosacro, para la realización de estas técnicas de bloqueo. La introducción de diferentes técnicas de imagen, fundamentalmente la ultrasonografía, para la localización de las estructuras nerviosas, facilita la realización de estos bloqueos y disminuye el riesgo de lesiones de los órganos adyacentes. La realización de los bloqueos continuos de nervio periférico ofrece el beneficio de una analgesia postoperatoria prolongada, con menores efectos adversos, mayor grado de satisfacción del paciente, y una recuperación funcional más rápida después de la cirugía.There is increasing interest in peripheral nerve blocks (PNB because of potential benefits relative to interactions of anticoagulants and central neuraxial techniques. Among all the regional anesthesia procedures, PNB of the lower limb, and specially sciatic nerve block

  13. [The role of intraoral mucosal receptors in the completely edentulous in the discrimination of the layers].

    Science.gov (United States)

    Orofino, J; Heraud, J E; Hartman, F; Mariani, P

    1989-06-15

    Studies on proprioceptive sensitivity in edentulous subjects let appear prevalent mucosal receptors compared to muscular or articular receptors. Neurophysiological mechanism seem identical in edentulous patients and statistical studies allowed us to highlight the functional characteristics of receptors in the intraoral mucosa; they replace the missing desmodontal receptors. The perception accuracy of extremely thin layers permits the practitioner to perfect his occlusal equilibration as well as to control his patient's occlusal vertical dimension with a new method of reference. The use of patient's sensitive information through their lemniscal systems should lead to a better integration of our dentures and avoid a physiopathology such as dysfunction of the temporomandibular joint. PMID:2630199

  14. Densitometric evaluation of intraoral x-ray films: Ektaspeed versus Ultraspeed

    International Nuclear Information System (INIS)

    Recently a new speed E intraoral dental x-ray film was introduced by the Eastman Kodak Company in order to reduce the radiation dose to the patient. In the present study the new higher-speed EP21 film was compared with the speed D DF58 film with regard to speed and quality (fog plus base, sharpness, resolution, and contrast) of the resulting images. Results showed no deterioration in the image with 50% dose reduction when the EP21 film was used as compared to the DF58 film. Therefore, this new type of film is highly recommended for routine radiographic examinations

  15. Interaction between intra-oral cinnamaldehyde and nicotine assessed by psychophysical and physiological responses

    DEFF Research Database (Denmark)

    Jensen, Tanja Kim; Andersen, Michelle Vandborg; Nielsen, Kent A.;

    2016-01-01

    ) received, in a randomized, double-blind, crossover design, three different gums containing 4 mg of nicotine, 20 mg of cinnamaldehyde, or a combination thereof. Assessments of orofacial temperature and blood flow, blood pressure, heart rate, taste experience, and intra-oral pain/irritation area and...... intensity were performed before, during, and after a 10-min chewing regime. Cinnamaldehyde increased the temperature of the tongue and blood flow of the lip, and was associated with pain/irritation, especially in the mouth. Nicotine increased the temperature of the tongue and blood flow of the cheek, and...

  16. 3D monitoring and quality control using intraoral optical camera systems.

    Science.gov (United States)

    Mehl, A; Koch, R; Zaruba, M; Ender, A

    2013-01-01

    The quality of intraoral scanning systems is steadily improving, and they are becoming easier and more reliable to operate. This opens up possibilities for routine clinical applications. A special aspect is that overlaying (superimposing) situations recorded at different times facilitates an accurate three-dimensional difference analysis. Such difference analyses can also be used to advantage in other areas of dentistry where target/actual comparisons are required. This article presents potential indications using a newly developed software, explaining the functionality of the evaluation process and the prerequisites and limitations of 3D monitoring.

  17. Bloqueo electrónico de la hebilla del cinturón de seguridad con detección del correcto abrochado

    OpenAIRE

    Prevosti Vives, Montserrat

    2011-01-01

    Impulsado por la problemática actual en el campo de la automoción, concretamente en el mal uso de los sistemas de retención de pasajeros, el presente proyecto consiste en el desarrollo de una idea, la investigación de su novedad, el análisis y estrategia de sus alternativas, el diseño de la solución, el cumplimiento de la normativa correspondiente y la redacción de una patente de la invención. La evolución de la idea nace con el concepto de un bloqueo electrónico de la hebilla ...

  18. Bloqueo auriculoventricular transitorio de primer grado en paciente con poliintoxicación por drogas de abuso y etanol: The Holiday Heart Syndrome

    Directory of Open Access Journals (Sweden)

    P Poveda Velázquez

    2014-01-01

    Full Text Available Las intoxicaciones por alcohol y drogas de abuso son una causa frecuente de consulta en los Servicios de Urgencias. Las alteraciones electrocardiográficas y las arritmias debidas a la ingesta de alcohol se conocen como Holiday Heart Syndrome. Este síndrome se define como la presencia de alteraciones del ritmo o de la conducción cardiaca asociadas al consumo de alcohol que revierten tras la intoxicación y que se producen en una persona sin enfermedad cardiaca conocida. La alteración más común es la fibrilación auricular. Se presenta el caso de una paciente joven que ingresa en urgencias por intoxicación por alcohol y diferentes drogas y que presentaba un bloqueo auriculoventricular de primer grado transitorio. Se discute el posible efecto causal de las drogas y del alcohol en los cambios electrocardiográficos observados en esta paciente.

  19. Anatomical variations of trabecular bone structure in intraoral radiographs using fractal and particles count analyses

    International Nuclear Information System (INIS)

    This study was performed to evaluate possible variations in maxillary and mandibular bone texture of normal population using the fractal analysis, particles count, and area fraction in intraoral radiographs. Periapical radiographs of patients who had full mouth intraoral radiographs were collected. Regions of interest (100X100 pixels) were located between the teeth of the maxillary anterior, premolar, and molar area, as well as the mandibular anterior, premolar, and molar areas. The fractal dimension (FD) was calculated by using the box counting method. The particle count (PC) and area fraction (AF) analyses were also performed. There was no significant difference in the FD values among the different groups of age, gender, upper, and lower jaws. The mean FD value was 1.49±0.01. The mean PC ranged from 44 to 54, and the mean AF ranged from 10.92 to 11.85. The values of FD, PC, and AF were significantly correlated with each other except for the upper molar area. According to the results, patients with normal trabecular pattern showed a FD of approximately 1.5. Based on these results, further investigation would be recommended if the FD value of patient significantly different from this number, since the alteration of this value indicates microstructural modification of trabecular pattern of the jaws. Additionally, with periapical radiographs, simple and cost-effective, PC and AF could be used to assess the deviation from the normal.

  20. Activation of lateral hypothalamus-projecting parabrachial neurons by intraorally delivered gustatory stimuli

    Directory of Open Access Journals (Sweden)

    Kenichi eTokita

    2014-07-01

    Full Text Available The present study investigated a subpopulation of neurons in the mouse parabrachial nucleus (PbN, a gustatory and visceral relay area in the brainstem, that project to the lateral hypothalamus (LH. We made injections of the retrograde tracer Fluorogold (FG into LH, resulting in fluorescent labeling of neurons located in different regions of the PbN. Mice were stimulated through an intraoral cannula with one of seven different taste stimuli, and PbN sections were processed for immunohistochemical detection of the immediate early gene c-Fos, which labels activated neurons. LH projection neurons were found in all PbN subnuclei, but in greater concentration in lateral subnuclei, including the dorsal lateral subnucleus (dl. Fos-like immunoreactivity (FLI was observed in the PbN in a stimulus-dependent pattern, with the greatest differentiation between intraoral stimulation with sweet (0.5 M sucrose and bitter (0.003 M quinine compounds. In particular, sweet and umami-tasting stimuli evoked robust FLI in cells in the dl, whereas quinine evoked almost no FLI in cells in this subnucleus. Double-labeled cells were also found in the greatest quantity in the dl. Overall, these results support the hypothesis that the dl contains direct a projection to the LH that is activated preferentially by appetitive compounds; this projection may be mediated by taste and/or postingestive mechanisms.

  1. A More Favorable Lower-Lip Incision for the Removal of Deep Intraoral Malignancies.

    Science.gov (United States)

    Xiang, Xian Wang; Feng, Da Jun; Chen, XiaoYang; Chen, Chuan Jun

    2016-05-01

    The straight midline lower lip-splitting incision has traditionally been performed with different types of deep intraoral malignancies for obtaining wide surgical access, and it can also be extended to the submandibular region or the neck to concurrently perform a neck dissection. But meanwhile, it is associated with unfavorable aesthetic and functional complications such as conspicuous facial scar, lip vermilion notching, stenosis of the labial sulcus, decreased lip sensation and movement, and oral incontinence. We designed a more favorable lower-lip incision, namely, para-lower lip incision, using the exposure and en blot resection of deep intraoral tumors. Compared with the traditional incision line, our designed line is shorter, and 20 outpatients (primary tumor site including buccal mucosa, tongue, mandibular gingiva, maxillary sinus, palate, and mouth floor) follow-ups indicated the postoperative scar is inconspicuous, no lip contour deformity and dysfunction or complications of facial paralysis such as distortion of commissure happened. This article reports one case of our patients who underwent para-lower-lip incision approach for the removal of squamous cell carcinoma (T3N2M0) in the left plate and the results of the patient were favorable. PMID:27159868

  2. Simulation of dental intensifying screen for intraoral radiographic using MCNP5 code

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Vanessa M.; Oliveira, Renato C.M., E-mail: vanessamachado@ufmg.br [Curso Superior de Tecnologia em Radiologia. Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, MG (Brazil); Barros, Graiciany P.; Oliveira, Arno H.; Veloso, M. Auxiliadora F. [Departamento de Engenharia Nuclear. Escola de Engenharia. Universidade Federal de Minas Gerais, Belo Horizonte, MG (Brazil)

    2011-07-01

    One of basic principles for radiological protection is the optimization of techniques for obtain radiographic images, in way that the dose in the patient is kept as low as reasonably achievable (ALARA). Intensifying screens are used in medical radiology, which reduce considerably the dose rates in the production of radiographic images, maintaining the quality of these, while in dental radiology, there is no a intensifying screen available for intraoral examinations. From this technological requirement, this paper evaluates a computational modeling of an intensifying screen for use in intraoral radiography. For this, it was used the Monte Carlo code MCNP5 that allows the radiography simulation through the transport of electrons and photons in the different materials present in this examination. The goal of an intensifying screen is the conversion of X-ray photons to photons in the visible spectrum, knowing that radiographic films are more sensitive to light photons than to X-ray photons. So the screen should be composed of an efficient material for converting x-rays photons in light photons, therefore was made simulations using different materials, thicknesses and positions possible for placing screen in radiographic film in order to find the way more technically feasible. (author)

  3. Simulation of dental intensifying screen for intraoral radiographic using MCNP5 code

    International Nuclear Information System (INIS)

    One of basic principles for radiological protection is the optimization of techniques for obtain radiographic images, in way that the dose in the patient is kept as low as reasonably achievable (ALARA). Intensifying screens are used in medical radiology, which reduce considerably the dose rates in the production of radiographic images, maintaining the quality of these, while in dental radiology, there is no a intensifying screen available for intraoral examinations. From this technological requirement, this paper evaluates a computational modeling of an intensifying screen for use in intraoral radiography. For this, it was used the Monte Carlo code MCNP5 that allows the radiography simulation through the transport of electrons and photons in the different materials present in this examination. The goal of an intensifying screen is the conversion of X-ray photons to photons in the visible spectrum, knowing that radiographic films are more sensitive to light photons than to X-ray photons. So the screen should be composed of an efficient material for converting x-rays photons in light photons, therefore was made simulations using different materials, thicknesses and positions possible for placing screen in radiographic film in order to find the way more technically feasible. (author)

  4. Radiation dosage reduction in general dental practice using digital intraoral radiographic systems

    International Nuclear Information System (INIS)

    This report describes the radiation dosage reduction possible in the general dental practice with two CCD (charge-coupled device)-based intraoral radiographic systems; the RVG-S (Trophy Radiologie, Vincennes, France) and the Sens-A-Ray (Regam Medical Systems, Sundsvall, Sweden). Radiation dosages (air-kerma; Gy) necessary for obtaining clinically acceptable images were measured at the cone tip using an ionization chamber type 660-1 (Nuclear Associates, Victoreen, Inc., Carle Place, New York, USA). When the RVG-S was used with an Oramatic 70 (Trophy Radiologie) X-ray generator, dosages at the cone tip ranged from 322 to 612 μGy. These corresponded to 40-60% of the dosages necessary when using Ektaspeed dental X-ray film (Eastman Kodak, Rochester, New York, USA) with a Heliodent 70 (Siemens, Erlangen, Germany) X-ray generator. At 60 kVp, the Sens-A-Ray reduced the dosage in the order of 30% compared with Ektaspeed dental X-ray film. Reduction in radiation dosage is one of the benefits of digital intraoral radiographic systems in general dental clinics. The RVG-S provides greater dose savings than does the Sens-A-Ray. (author)

  5. Intraoral conversion of occlusal force to electricity and magnetism by biting of piezoelectric elements.

    Science.gov (United States)

    Kameda, Takashi; Ohkuma, Kazuo; Sano, Natsuki; Ogura, Hideo; Terada, Kazuto

    2012-01-01

    Very weak electrical, magnetic and ultrasound signal stimulations are known to promote the formation, metabolism, restoration and stability of bone and surrounding tissues after treatment and operations. We have therefore investigated the possibility of intraoral generation of electricity and magnetism by occlusal force in an in vitro study. Biting bimorph piezoelectric elements with lead zirconate titanate (PZT) using dental models generated appropriate magnetism for bone formation, i. e. 0.5-0.6 gauss, and lower electric currents and higher voltages, i. e. 2.0-6.0 μA at 10-22 V (appropriate levels are 30 μA and 1.25 V), as observed by a universal testing machine. The electric currents and voltages could be changed using amplifier circuits. These results show that intraoral generation of electricity and magnetism is possible and could provide post-operative stabilization and activation of treated areas of bone and the surrounding tissues directly and/or indirectly by electrical, magnetic and ultrasound stimulation, which could accelerate healing.

  6. Anatomical variations of trabecular bone structure in intraoral radiographs using fractal and particles count analyses

    Energy Technology Data Exchange (ETDEWEB)

    Amer, Maha Eshak [Faculty of Dentistry, Minia University, El Menia (Egypt); Heo, Min Suk [School of Dentistry, Seoul National University, Seoul (Korea, Republic of); Brooks, Sharon L; Benavides, Erika [School of Dentistry, University of Michigan, Ann Arbor (United States)

    2012-03-15

    This study was performed to evaluate possible variations in maxillary and mandibular bone texture of normal population using the fractal analysis, particles count, and area fraction in intraoral radiographs. Periapical radiographs of patients who had full mouth intraoral radiographs were collected. Regions of interest (100X100 pixels) were located between the teeth of the maxillary anterior, premolar, and molar area, as well as the mandibular anterior, premolar, and molar areas. The fractal dimension (FD) was calculated by using the box counting method. The particle count (PC) and area fraction (AF) analyses were also performed. There was no significant difference in the FD values among the different groups of age, gender, upper, and lower jaws. The mean FD value was 1.49{+-}0.01. The mean PC ranged from 44 to 54, and the mean AF ranged from 10.92 to 11.85. The values of FD, PC, and AF were significantly correlated with each other except for the upper molar area. According to the results, patients with normal trabecular pattern showed a FD of approximately 1.5. Based on these results, further investigation would be recommended if the FD value of patient significantly different from this number, since the alteration of this value indicates microstructural modification of trabecular pattern of the jaws. Additionally, with periapical radiographs, simple and cost-effective, PC and AF could be used to assess the deviation from the normal.

  7. Kinematics of intraoral transport and swallowing in the herbivorous lizard uromastix acanthinurus

    Science.gov (United States)

    Herrel; Vree

    1999-05-01

    The kinematics of intraoral transport and swallowing in lizards of the species Uromastix acanthinurus (Chamaeleonidae, Leiolepidinae) were investigated using cineradiography (50 frames s-1). Additional recordings were also made using high-speed (500 frames s-1) and conventional video systems (25 frames s-1). Small metal markers were inserted into different parts of the upper and lower jaw and the tongue. Cineradiographic images were digitised, and displacements of the body, head, upper and lower jaw and the tongue were quantified. Twenty additional variables depicting displacements and the timing of events were calculated. Multivariate analyses of variance indicated significant differences between feeding stages. Remarkably, only very few food-type-dependent differences were observed during intraoral transport, and no such differences could be demonstrated during swallowing. Using previously published data for the closely related insectivorous lizard Plocederma stellio, the effect of dietary specialisation in U. acanthinurus on the kinematic variables while eating locusts was examined. Species differed in a number of gape- and tongue-related variables. These differences may be related to differences in tongue structure between the species. Clearly, U. acanthinurus possesses a specialised gut and dental structure that allows them efficiently to cut pieces from whole leaves. However, a decrease in modulatory capacity seems to be a consequence of dietary specialisation in Uromastix acanthinurus. PMID:10101110

  8. Radiation dosage reduction in general dental practice using digital intraoral radiographic systems.

    Science.gov (United States)

    Hayakawa, Y; Shibuya, H; Ota, Y; Kuroyanagi, K

    1997-02-01

    This report describes the radiation dosage reduction possible in the general dental practice with two CCD (charge-coupled device)-based intraoral radiographic systems: the RVG-S (Trophy Radiologie, Vincennes, France) and the Sens-A-Ray (Regam Medical Systems, Sundsvall, Sweden). Radiation dosages (air-kerma; Gy) necessary for obtaining clinically acceptable images were measured at the cone tip using an ionization chamber type 660-1 (Nuclear Associates, Victoreen, Inc., Carle Place, New York, USA). When the RVG-S was used with an Oramatic 70 (Trophy Radiologie) X-ray generator, dosages at the cone tip ranged from 322 to 612 microGy. These corresponded to 40-60% of the dosages necessary when using Ektaspeed dental X-ray film (Eastman Kodak, Rochester, New York, USA) with a Heliodent 70 (Siemens, Erlangen, Germany) X-ray generator. At 60 kVp, the Sens-A-Ray reduced the dosage in the order of 30% compared with Ektaspeed dental X-ray film. Reduction in radiation dosage is one of the benefits of digital intraoral radiographic systems in general dental clinics. The RVG-S provides greater dose savings than does the Sens-A-Ray.

  9. Stereologic, histopathologic, flow cytometric, and clinical parameters in the prognostic evaluation of 74 patients with intraoral squamous cell carcinomas

    DEFF Research Database (Denmark)

    Bundgaard, T; Sørensen, Flemming Brandt; Gaihede, M;

    1992-01-01

    BACKGROUND AND METHODS: A consecutive series of all 78 incident cases of intraoral squamous cell carcinoma occurring during a 2-year period in a population of 1.4 million inhabitants were evaluated by histologic score (the modified classification of Jacobsson et al.), flow cytometry, stereology, ...

  10. The Effect of Short-Term Auditory Deprivation on the Control of Intraoral Pressure in Pediatric Cochlear Implant Users.

    Science.gov (United States)

    Jones, David L.; Gao, Sujuan; Svirsky, Mario A.

    2003-01-01

    A study investigated whether two speech measures (peak intraoral air pressure (IOP) and IOP duration) obtained during production of intervocalic stops would be altered by the presence or absence of a cochlear implant in five children (ages 7-10). The auditory condition affected peak IOP more than IOP duration. (Contains references.) (Author/CR)

  11. Immunoexpression of cleaved caspase-3 shows lower apoptotic area indices in lip carcinomas than in intraoral cancer

    Science.gov (United States)

    LEITE, Ana Flávia Schueler de Assumpção; BERNARDO, Vagner Gonçalves; BUEXM, Luisa Aguirre; da FONSECA, Eliene Carvalho; da SILVA, Licínio Esmeraldo; BARROSO, Danielle Resende Camisasca; LOURENÇO, Simone de Queiroz Chaves

    2016-01-01

    ABSTRACT Objective This study aimed to evaluate apoptosis by assessing cleaved caspase-3 immunoexpression in hyperplastic, potentially malignant disorder (PMD), and malignant tumors in intraoral and lower lip sites. Material and Methods A retrospective study using paraffin blocks with tissues from patients with inflammatory fibrous hyperplasia (IFH), actinic cheilitis, oral leukoplakia, lower lip and intraoral squamous cell carcinoma (SCC) was performed. The tissues were evaluated by immunohistochemical analysis with anti-cleaved caspase-3 antibody. Apoptotic area index was then correlated with lesion type. Results From 120 lesions assessed, 55 (46%) were cleaved caspase-3-positive. The SCC samples (n=40) had the highest apoptotic area indices (n=35; 87.5%). Significant differences were detected between SCCs and PMDs (p=0.0003), as well as SCCs and IFHs (p=0.001), regarding caspase-3 immunopositivity. Carcinomas of the lower lip had lower apoptotic area indices than intraoral cancer (p=0.0015). Conclusions Cleaved caspase-3 immunoexpression showed differences in oral SCCs and PMDs and demonstrated a distinct role of apoptosis in carcinogenesis of intraoral and lower lip cancer. In future, the expression of cleaved caspase-3 with other target molecules in oral cancer may be helpful in delineating the prognosis and treatment of these tumors. PMID:27556207

  12. Analgesia postoperatoria tras artroplastia de rodilla mediante bloqueo femoral continuo con ropivacaína Postoperative analgesia after knee arthroplasty through continuous femoral blockage with ropivacaine

    Directory of Open Access Journals (Sweden)

    M. Reina

    2004-02-01

    Full Text Available Introducción: El objetivo del estudio es conocer el grado de dolor y satisfacción en el postoperatorio de los pacientes que han recibido analgesia mediante bloqueo femoral continuo en artroplastia total de rodilla. Material y método: Se incluyeron pacientes ASA I-III diagnosticados de gonartrosis e intervenidos de artroplastia total de rodilla bajo anestesia intradural. En la Sala de Despertar y bajo los efectos residuales de la anestesia intradural se colocó un catéter en la proximidad del nervio femoral, con neuroestimulación. Se administró un bolo inicial de ropivacaína 0,375% 30 ml, seguido de una perfusión continua de ropivacaína 0,125% 10 ml.h-1, que se mantuvo durante las primeras 48 horas del postoperatorio. Las variables registradas fueron las siguientes: dolor postoperatorio a las 24 y 48 horas mediante EVA, localización del dolor, existencia o no de bloqueo motor, parestesias-disestesias y efectos secundarios, así como fármacos utilizados en caso de analgesia insuficiente, dificultad de la técnica y grado de satisfacción a las 48 horas. Resultados: Se incluyeron 8 pacientes, con peso y altura media de 78 kg y 157 cm respectivamente. El análisis del dolor registrado a las 24 horas fue en un 62,5% de EVA 0, en un 25% EVA 5 y en un 12,5% EVA 6. A las 48 horas el 87,5% de los pacientes tenían un EVA 0 y un 12,5% EVA 4. Todos los pacientes con dolor lo localizaron en hueco poplíteo. En ningún caso hubo bloqueo motor. El 25% presentaron parestesias a las 24-48 horas y el 12,5% episodio de náuseas. En caso de analgesia insuficiente se complementó el tratamiento con AINE intravenosos y en un caso con bloqueo del nervio ciático por abordaje anterior. La técnica realizada resultó fácil en el 87,5% de los pacientes y muy difícil en el 12,5%. El grado de satisfacción fue superior a 7 en todos los pacientes. Conclusiones: El bloqueo 3 en 1 continuo en nuestra serie, proporcionó una analgesia eficaz en pacientes

  13. Intraoral removal of a large epidermoid cyst of the floor of the mouth. A case report and review of the literature.

    Directory of Open Access Journals (Sweden)

    Fotios TZERMPOS

    2014-12-01

    Full Text Available SUMMARY: The intraoral dermoid cysts constitute less than 0.01% of all oral cavity cysts and are most commonly located in the midline of the floor of the mouth. Histologically they are divided into epidermoid, dermoid and teratoid. The surgical excision can be performed either intraorally or extraorally and the choice of treatment can be determined by the localization and the size of the lesion. In this article, a case of a large epidermoid cyst of the floor of the mouth removed by intraoral excision under local anesthesia with i.v. sedation is presented.

  14. Intraoral framework pick-up technique to improve fit of a metal-resin implant prosthesis

    Directory of Open Access Journals (Sweden)

    Mirza Rustum Baig

    2012-01-01

    Full Text Available The achievement of passive fit is an important prerequisite for the prevention of complications in full-arch screw-retained implant prosthesis. With cemented prosthesis, the cementation compensates for the discrepancies in the cast framework, but the lack of retrievability seems undesirable. The aim of this paper is to propose a modified screw-retained prosthesis design for complete arch implant fixed rehabilitation. A technique for the fabrication of a full-arch metal-resin implant-supported screw-retained prosthesis is described. Cementation of the framework to the abutments intraorally improves the passivity of fit of the prosthesis on the implants. Maintenance of screw-access channels in the final prosthesis ensures retrievability. The metal-resin design allows for easy repair and maintenance. The prosthesis is cost-effective compared to conventional options and can be employed as a viable treatment alternative when considering metal-acrylic resin complete arch fixed prosthesis.

  15. Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

    International Nuclear Information System (INIS)

    The development of veterinary dentistry has substantially improved the ability to diagnose canine and feline dental abnormalities. Consequently, examinations previously performed only on humans are now available for small animals, thus improving the diagnostic quality. This has increased the need for technical qualification of veterinary professionals and increased technological investments. This study evaluated the use of cone beam computed tomography and intraoral radiography as complementary exams for diagnosing dental abnormalities in dogs and cats. Cone beam computed tomography was provided faster image acquisition with high image quality, was associated with low ionizing radiation levels, enabled image editing, and reduced the exam duration. Our results showed that radiography was an effective method for dental radiographic examination with low cost and fast execution times, and can be performed during surgical procedures

  16. Adjuvant chemotherapy in the treatment of intra-oral squamous cell carcinoma

    International Nuclear Information System (INIS)

    Forty five patients with intra-oral squamous cell carcinoma were treated with bleomycin (150 mg) and external irradiation (50 Gy/5 weeks). The response to treatment was observed in 82.2 per cent patients. Another group of 47 patients was irradiated with radical doses of radiotherapy (65 Gy/6 weeks). The response rate was 68.1 per cent. In the former group twenty six patients (57.8 per cent) survived, free from recurrence at five years. The survival rate in the control group was 40.4 per cent (19 out of 47). The toxicity was slightly more pronounced in the patients treated by the combination regime. However, most of them were able to complete the treatment uninterrupted. The literature has been reviewed to evaluate the efficacy of various dosage and fractionation schedules of the bleomycin and radiation, combination. (author). 4 tabs., 12 refs

  17. Diagnosis of dental caries from intra-oral roentgenograms; Rozpoznawanie prochnicy zebow na podstawie zdjec wewnatrzustnych

    Energy Technology Data Exchange (ETDEWEB)

    Struzak-Wysokinska, M.; Drop, B.; Drop, A. [Akademia Medyczna, Lublin (Poland)

    1991-12-31

    On 238 intra-oral roentgenograms there were assessed curious process, shape, size extent and depth of defects as well as the possibility of complications in teeth which were not treated. There were assessed 277 defects, out of which 194 in upper teeth and 83 in lower ones. In all the teeth of the maxilla and of the mandible there was found the greatest number of amorphous defects and semilunar contact surfaces. There were also observed a lot of defects in radiciform cementum, thus, often under the gingivae. These are sites difficult for access for clinical examination. That is why radiologic examination is often conclusive in localizing curious process and in accurate diagnosing in the case of pulpits going on. (author). 4 refs, 1 fig., 3 tabs.

  18. Self-Inflicted Intraoral Hematoma in a Cardiac Patient Receiving Oral Anticoagulant Therapy- A Case Report

    Directory of Open Access Journals (Sweden)

    Shantala Arunkumar

    2015-01-01

    Full Text Available Intraoral hematoma secondary to systemic anticoagulant therapy is rare, but it is a potentially fatal condition requiring immediate medical management. Case report: Here we report a case of self-inflicted hematoma in the anterior maxillary gingival region in a 65year old female cardiac patient who was on systemic anticoagulant therapy with a poor periodontal condition, manifesting as a periodontal swelling for a period of one week. Oral anticoagulant therapy is considerably imperative to prevent thromboembolic complications in various medical conditions, in such patients there are chances for spontaneous bleeding or hematoma by means of minor trauma due to sharp teeth or dental prosthesis in the mouth leading to life threatening complications such as partial or complete airway blockage. Therefore,directives about possible bleeding complications secondary to anticoagulant drugs in the oral cavity and the importance of maintaining oral health hygiene are necessary for the patient.

  19. Dose and risk evaluation to the thyroid gland in intra-oral dental radiology

    International Nuclear Information System (INIS)

    Intra-oral technique is one of the most frequently used procedures of dental radiology, allowing the detection of a variety of dental anomalies such as caries, dental trauma and periodontal lesions, while exposing patients to relatively low doses of radiation. However, although the adverse effects of doses generated by dental radiology are essentially stochastic, a number of epidemiological studies have provided evidence of an increased risk of thyroid tumors for dental radiography. Many studies have measured doses of radiation for dental radiography, but only a few have estimated thyroid dose. Furthermore, most of the studies on dose evaluation in dental radiology are based on standardized calculation phantoms, which neglect the variance of the patient size or even sex. The purpose of this study is to use the Monte Carlo code MCNPX and the FAX (Female Adult voXel) and MAX (Male Adult voXel) phantoms to investigate how absorbed doses to the thyroid gland in intraoral dental examinations vary in female and male patients. The lifetime cancer incidence attributable to dental examinations were estimated using the Biological Effects of Ionizing Radiations (BEIR) VII Committee Report. The phantoms study proved a useful trial for detecting the radiation dose to the thyroid gland and conclusively supported that the anatomy may be regarded as an influencing factor in radiation dose received during dental examination. Finally, the results have also confirmed that the association of the MCNPX code and the MAX and FAX phantoms is very useful in dosimetric studies on radiographic examinations of female and male patients. (author)

  20. The use of intraoral radiographs for identification of edentulous patients rehabilitated with implants.

    Science.gov (United States)

    Ahlqvist, J

    2016-01-01

    The aims of this study were; i) to determine the accuracy by which two intra-oral radiographic examinations performed on patients with edentulous mandibles treated with dental implants can be matched. ii) to determine whether prosthodontic supra-construction is important for matching. iii) to investigate whether there is a difference between oral and maxilla-facial radiologists (OMR) and dental practitioners, not specialized in oral and maxillofacial radiology (NOMR), regarding their ability to match. The specific features of the radiographs used by the operators to acquire a match were also investigated. Intra-oral radiographic examinations from 59 patients were utilized. Radiographic examinations from 47 patients carried out at placement of the supra-construction and at subsequent follow-up examinations were used as "ante-mortem" and "post-mortem" records respectively. Examinations from 12 patients were added to the "post-mortem" records without "ante-mortem" records being available. The study was divided into two parts. In Part One all "ante"- and "post-mortem" records had the supra-construction masked and in Part Two it was visible. Seven dentists (4 OMR, 3 NOMR) were instructed to specify on what basis each matching was made on the confidence of a three-graded scale OMR had 93.2 % and 98.5 % accuracy in Parts One and Two respectively. NOMR had 63.8 % and 87.9 %. Bone anatomy was the most commonly used feature by OMR to obtain a match. For NOMR it was the appearance of the fixtures. OMR reported higher confidence in their ability to match the examinations. This study indicates that OMR could be a valuable resource in cases of identification where dental implants are a feature of the post-mortem dental records. PMID:27350697

  1. Textural characterization of finished and polished composites over time of intraoral exposure.

    Science.gov (United States)

    Turssi, Cecilia Pedroso; Rodrigues, Antonio Luiz; Serra, Mônica Campos

    2006-02-01

    This in situ study sought to evaluate the surface roughness evolution of resin composites finished and polished by different methods. A total of 108 rectangular-shaped specimens of a microfilled and a hybrid composite were cured against a Mylar matrix strip and left unpolished or instrumented with diamond burs, Al2O3-coated disks, Al2O3-impregnated UDMA disk, or with diamond burs followed by either one of the disks. After specimens had been profiled for the average surface roughness (Ra, microm), 18 volunteers wore a removable palatal appliance, which accommodated one specimen of each one of the 12 groups investigated. Surface roughness for up to 28 days of intraoral exposure was then measured at 1- or 7-day intervals. A split-plot ANOVA (alpha = 0.05) revealed a significant interaction between group and time. Tukey's test and regression analyses ascertained that initially finishing with burs only provided the roughest surface to both composites. Unpolished surfaces and those specimens polished with Al2O3-coated disks, regardless of previous use of diamond burs, attained smoother surface. The Al2O3-impregnated UDMA disk was capable of smoothening the surface of the hybrid material previously finished with diamond burs. The roughness achieved after finishing and polishing composites may be either smoothened or roughened after intraoral exposure. On the basis of the roughness range, it is advisable to use Al2O3-coated disks, regardless of whether diamond burs were previously used. Al2O3-impregnated UDMA disks (with or without previous application of diamond burs) may be also suitable for instrumenting hybrid restoratives. PMID:16206257

  2. A primary study of appropriate intraoral scanning frequency of single 3D image

    Science.gov (United States)

    Li, Hong; Lyu, Peijun; Sun, Yuchun; Wang, Yong; Liang, Xiaoyue

    2015-07-01

    Objective To make a quantitative analysis between sampling frequencies and micro-movement distance of mark points on tooth surfaces, and to provide a reference for sampling frequency settings of intraoral scanning systems. Methods Mark points affixed to the incisors of five subjects. In total, 3600 groups of tracking point coordinates were obtained with frequencies of 60, 150 and 300 Hz using an optical 3D tracking system. The data was then re-sampled to obtain coordinates at lower frequencies (5, 10, 15 and 20 Hz) at equal intervals of groups of tracking point coordinates. Change in distance (Δd) was defined as the change in position of a single v from one sampling time point to another, and was valued by clinical accuracy requirement (20-100μm). The curve equation was fit quantitatively between Δd median (M) and the sampling frequency (f). The difference between upper and lower incisor mark points were analyzed by a non-parametric test; α=0.05. Result When the frequency (f) was 60 Hz, upper jaw Δd median (M) and interquartile (Q) were 14.4 μm and 9.2 μm, respectively, while the lower Δd(M) and (Q) were 6.4 μm and 10.2 μm, respectively. Every Δd value was less than 100 μm, while 74% of Δd vales were less than 20 μm. Δd(M) and f satisfy the power curve equation: Δd(M)=0.526×f-0.979(f∈[5,300]). Significant differences of incisor feature points were noted between upper and lower jaws of the same subject (P<0.01). Conclusion Clinical accuracy can be met when the sampling frequency of the intraoral scanning system is 60 Hz.

  3. Bloqueo dual del sistema renina-angiotensina frente a la monoterapia: revisión sistemática y metanálisis acumulativo de ensayos clínicos y estudios observacionales

    Directory of Open Access Journals (Sweden)

    Ferrán Catalá-López

    2014-01-01

    Full Text Available Fundamentos: Trabajos previos han sugerido que el bloqueo dual con inhibidores del sistema renina-angiotensina (SRA estaría asociado a un incremento de efectos adversos comparado con la monoterapia. Se reexamina la seguridad del doble bloqueo del SRA, especialmente en pacientes de riesgo y se explora la estabilidad de la evidencia acumulada a lo largo de los años. Método: Revisión sistemática con metaanálisis de efectos aleatorios. Se revisaron 15 metaanálisis publicados anteriormente como punto de partida. Se realizó una búsqueda en PubMed/Medline de estudios observacionales y de ensayos clínicos controlados recientes. Las variables dependientes estudiadas fueron: mortalidad (general y cardiovascular, hiperpotasemia, hipotensión, insuficiencia renal, accidente cerebrovascular y la retirada del tratamiento por efectos adversos. Se calcularon los riesgos relativos (RR y su intervalo de confianza (IC95%Resultados: El bloqueo dual del SRA no se asoció con una reducción del RR de la mortalidad general (RR:1,00; IC95%: 0,96-1,05; 21 estudios, ni de la mortalidad cardiovascular (RR:1,01; 0,94-1,09; 13 estudios ni del riesgo de accidente cerebrovascular (RR:1,02; 0,94-1,11; 11 estudios en comparación con la monoterapia. El bloqueo dual se asoció a un riesgo aumentado de hiperpotasemia (RR:1,58; 1,37-1,81; 34 estudios, hipotensión (RR:1,66; 1,41-1,95; 25 estudios, daño renal (1,52; 1,28-1,81; 29 estudios y retirada del tratamiento por efectos adversos (RR:1,26; 1,22-1,30; 37 estudios. Los resultados fueron consistentes en las cohortes de pacientes con diabetes mellitus, enfermedad renal o insuficiencia cardiaca. Conclusiones: El bloqueo dual del SRA vs monoterapia incrementa los riesgos de hiperpotasemia, hipotensión, insuficiencia renal e interrupción del tratamiento por efectos adversos. Además no ofrece beneficios adicionales por reducción de la mortalidad general, mortalidad cardiovascular o accidente cerebrovascular. Estos

  4. EVOLUCIÓN DE FENÓMENOS BÁSICOS DE APRENDIZAJE EN TAREAS DE MEMORIA ESPACIAL: BLOQUEO, ENSOMBRECIMIENTO E INHIBICIÓN LATENTE EN ANFIBIOS

    Directory of Open Access Journals (Sweden)

    MARÍA FLORENCIA DANERI

    2015-01-01

    Full Text Available En este artículo se describen desde una perspectiva comparativa los fenómenos de bloqueo, ensombrecimiento e inhibición latente, enfatizando su presencia en tareas de aprendizaje espacial. Estos fenómenos de aprendizaje, ampliamente observados en otras clases de vertebrados e invertebrados, han sido recientemente descriptos por primera vez en anfibios, un grupo de vertebrados con un cerebro filogenéticamente antiguo. Tomando como modelo al sapo terrestre Rhinella arenarum, se revisarán los tres fenómenos de aprendizaje asociativo mencionados en una situación de aprendizaje espacial: (1 bloqueo entre claves visuales asociadas a una meta, (2 ensombrecimiento de una clave visual lejana por la presencia de una clave cercana y (3 inhibición latente debida a la pre-exposición a una cla ve visual. Todos los entrenamientos se llevaron a cabo en una arena circular de color blanco, utilizando agua como recompensa. Dentro de la arena, se distribuyeron cuatro piletas de acrílico en forma de cruz contra las paredes laterales (sólo una tenía acceso a la recompensa. En las paredes interiores de la arena circular se colocaron varias señales visuales para guiar a los animales. Los resultados obtenidos en sapos indican que estos fenómenos, observados previamente en aves y mamíferos, también se encuentran en este grupo (uti lizando un paradigma de aprendizaje espacial con claves visuales cercanas y lejanas. Este primer registro en anfibios sugiere que los mecanismos biológicos de estos fenómenos de aprendizaje han surgido muy tempranamente en el curso de la evolución de los vertebrados totalmente terrestres y que los mismos han sido fuertemente conservados. El análisis comparado de estos hallazgos contribuirá a mejorar el entendimiento de los mecanismos biológicos que subyacen al aprendizaje espacial, en busca de patrones funcionales comunes con otras clases de vertebrados y potencialmente presentes en un ancestro común.

  5. Performance comparison between three intraoral image receptors of different technology at a variety of tube potential, tube current and exposure time settings using a stepwedge phantom

    OpenAIRE

    Elli Katsoni; Ioannis A. Tsalafoutas; Panagiotis Gritzalis; Evripidis Stefanou; Evangelos Georgiou; Emmanuel Yakoumakis

    2011-01-01

    Purpose: To comparatively evaluate the per-formance of three intraoral image receptors of different technology when exposed to different X-ray beam spectra, dose and dose rate levels using a stepwedge phantom. Materials and methods: The intraoral radiographic receptors evaluated were: the Kodak Insight F speed class film, the Kodak RVG 6000, and the Duerr Vis-tascan Combi PSP system. A dental quality control phantom made of Plexiglas, containing an aluminium stepwedge with 12 steps and 7 hole...

  6. Validity of Intraoral Scans Compared with Plaster Models: An In-Vivo Comparison of Dental Measurements and 3D Surface Analysis

    Science.gov (United States)

    2016-01-01

    Purpose Dental measurements have been commonly taken from plaster dental models obtained from alginate impressions can. Through the use of an intraoral scanner, digital impressions now acquire the information directly from the mouth. The purpose of this study was to determine the validity of the intraoral scans compared to plaster models. Materials and Methods Two types of dental models (intraoral scan and plaster model) of 20 subjects were included in this study. The subjects had impressions taken of their teeth and made as plaster model. In addition, their mouths were scanned with the intraoral scanner and the scans were converted into digital models. Eight transverse and 16 anteroposterior measurements, 24 tooth heights and widths were recorded on the plaster models with a digital caliper and on the intraoral scan with 3D reverse engineering software. For 3D surface analysis, the two models were superimposed by using best-fit algorithm. The average differences between the two models at all points on the surfaces were computed. Paired t-test and Bland-Altman plot were used to determine the validity of measurements from the intraoral scan compared to those from the plaster model. Results There were no significant differences between the plaster models and intraoral scans, except for one measurement of lower intermolar width. The Bland-Altman plots of all measurements showed that differences between the two models were within the limits of agreement. The average surface difference between the two models was within 0.10 mm. Conclusions The results of the present study indicate that the intraoral scans are clinically acceptable for diagnosis and treatment planning in dentistry and can be used in place of plaster models. PMID:27304976

  7. Bloqueo mediático, redes sociales y malestar ciudadano. Para entender el movimiento español del 15-M

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    Xosé Ramón Rodríguez-Polo

    2013-01-01

    Full Text Available El movimiento del 15-M ha sido la movilización más importante que ha vivido España en los últimos años. En este trabajo proponemos analizar este fenómeno mediante el estudio de cuatro elementos que consideramos que presentan las claves para entender algunas de sus causas y el enorme respaldo social que alcanzó. Empleando el análisis secundario de datos abordamos el estudio de la situación de bloqueo del debate público, la incidencia política que facilitan los medios sociales, los colectivos activistas y el descontento de la ciudadanía española. Del análisis de la opinión pública se colige que el problema económico de la crisis derivó, por causa de su gestión, en un problema social, para transformarse finalmente en un problema político, manifestado en un clima de enorme descontento con la situación política y con el gobierno. La irrupción del 15-M hizo aflorar todo el malestar acumulado, convirtiendo un acto organizado por colectivos minoritarios en toda una marea ciudadana de repulsa.

  8. Bloqueo aurículo-ventricular de primer grado en tirotoxicosis aguda First degree atrio-ventricular block in acute thyrotoxicosis

    Directory of Open Access Journals (Sweden)

    Antonio R. Vilches

    2004-02-01

    Full Text Available El cuadro clínico de la tirotoxicosis incluye síntomas cardiovasculares variados. La taquicardia sinusal es el trastorno electrocardiográfico más frecuente y los trastornos de conducción son extremadamente raros como modo de presentación. Comunicamos un caso de bloqueo aurículo-ventricular de primer grado en una paciente con hipertiroidismo recién diagnosticado y que comenzó días antes de la consulta con un cuadro general inespecífico. Su evaluación ulterior demostró que se trataba de una tirotoxicosis aguda autoinmune, y su tratamiento con metimazol corrigió el trastorno totalmente. Se discuten los mecanismos fisiopatológicos involucrados y las implicancias clínicas desde el punto de vista del internista.Thyrotoxicosis may present with a variety of cardiovascular symptoms. Sinus tachycardia is the most frequently encountered electrocardiographic abnormality and conduction disturbances are extremely uncommon. We present a case of first degree atrio-ventricular block in a patient with newly diagnosed hyperthyroidism and discuss the underlying pathophysiological mechanisms and the clinical implications from the internist’s standpoint.

  9. Comparative evaluation of the sensitometric properties of screen-film systems and conventional dental receptors for intraoral radiography

    Energy Technology Data Exchange (ETDEWEB)

    Kircos, L.T.; Staninec, M.; Chou, L.

    1989-12-01

    This investigation determined the sensitometric properties of 27 rare-earth screen-film combinations and compared them to E- and D-speed films and xeroradiography, the current standards for intraoral radiography. A series of exposures from base plus fog to film saturation were made to determine the Hurter and Driffield curve of each image receptor. The base plus fog, film saturation, speed, gamma, average gradient, and resolution were determined. When dental receptors and screen-film systems are compared on the basis of radiographic quality (contrast and resolution), many screen-film systems have similar resolution (greater than 10 line pairs/mm), significantly greater contrast (greater than 2.0), and a substantial speed advantage (greater than 10). Thus selected screen-film systems may be an alternative to conventional dental receptors for intraoral radiography.

  10. Signal loss in magnetic resonance imaging caused by intraoral anchored dental magnetic materials; Signalloeschung im MRT-Bild, verursacht durch intraoral verankerte dentale Magnetwerkstoffe

    Energy Technology Data Exchange (ETDEWEB)

    Blankenstein, F.H.; Naumann, M. [Zentrum fuer Zahnmedizin (CVK), Charite - Universitaetsmedizin Berlin (Germany); Truong, B. [Zahnarztpraxis, Berlin (Germany); Thomas, A.; Schroeder, R.J. [Klinik fuer Strahlenheilkunde, Charite - Universitaetsmedizin Berlin (Germany)

    2006-08-15

    Purpose: to measure the maximum extent of the signal loss areas in the center of the susceptibility artifacts generated by ferromagnetic dental magnet attachments using three different sequences in the 1.5 and 3.0 Tesla MRI. Materials and methods: five different pieces of standard dental magnet attachments with volumes of 6.5 to 31.4 mm{sup 3} were used: a NdFeB magnet with an open magnetic field, a NdFeB magnet with a closed magnetic field, a SmCo magnet with an open magnetic field, a stainless steel keeper (AUM-20) and a PdCo piece. The attachments were placed between two cylindrical phantoms and examined in 1.5 and 3.0 Tesla MRI using gradient echo and T1- and T2-weighted spin echoes. We measured the maximum extent of the generated signal loss areas parallel and perpendicular to the direction of B{sub O}. Results: in gradient echoes the artifacts were substantially larger and symmetrically adjusted around the object. The areas with total signal loss were mushroom-like with a maximum extent of 7.4 to 9.7 cm parallel to the direction of B{sub O} and 6.7 to 7.4 cm perpendicular to B{sub O}. In spin echoes the signal loss areas were obviously smaller, but not centered. The maximum values ranged between 4.9 and 7.2 cm (parallel B{sub O}) and 3.6 and 7.0 cm (perpendicular B{sub O}). The different ferromagnetic attachments had no clinically relevant influence on the signal loss neither in 1.5 T nor 3.0 T MRI. Conclusions: ferromagnetic materials used in dentistry are not intraorally standardized. To ensure, that the area of interest is not affected by the described artifacts, the maximum extent of the signal loss area should be assumed: a radius of up to 7 cm in 1.5 and 3.0 T MRI by T1 and T2 sequences, and a radius of up to 10 cm in T2* sequences. To decide whether magnet attachments have to be removed before MR imaging, physicians should consider both the intact retention of the keepers and the safety distance between the ferromagnetic objects and the area of

  11. Gray value differences to dentin of root posts radiographed with digital intraoral systems and conventional X-ray films.

    Science.gov (United States)

    Wicht, S; Pfeiffer, P; Rother, U; Nergiz, I; Schmage, P

    2011-01-01

    This study compared the gray value differences to dentin of titanium and FRC root posts in anterior and posterior teeth radiographed with digital intraoral systems and conventional x-ray film. Radiographic images (n=5) of titanium or fiber-reinforced composite (FRC) root posts placed in extracted teeth were taken with six digital intraoral radiographic devices and conventional x-ray film (control group). Gray value differences were evaluated between the root posts and root dentin. Statistical analyses of the results were performed with three-way and one-way ANOVA with Bonferroni-Dunn's multiple comparisons post-hoc analyses (α=0.05). Significantly higher gray value differences of titanium and FRC posts were found in anterior teeth but not in molars for XIOS, Sidexis and Visualix digital intraoral systems, but not for RVG, DenOptix and VistaScan (FRC posts). Except for DenOptix with incisors and molars and VistaScan with molars, conventional x-ray films showed significantly lower gray value differences of titanium posts in incisors and molars compared to the corresponding digital radiographs.

  12. Intra-oral orthosis vs amitriptyline in chronic tension-type headache: a clinical and laser evoked potentials study

    Directory of Open Access Journals (Sweden)

    Sardaro Michele

    2006-05-01

    Full Text Available Abstract Background In the present study, we examined clinical and laser-evoked potentials (LEP features in two groups of chronic tension-type headache (CTTH patients treated with two different approaches: intra-oral appliance of prosthesis, aiming to reduce muscular tenderness, and 10 mg daily amitriptyline. Methods Eighteen patients with diagnosed CTTH participated in this open label, controlled study. A baseline evaluation was performed for clinical features, Total Tenderness Score (TTS and a topographic analysis of LEPs obtained manually and the pericranial points stimulation in all patients vs. healthy subjects. Thereafter, patients were randomly assigned to a two-month treatment by either amitriptyline or intra-oral appliance. Results and discussion Both the intra-oral appliance and amitriptyline significantly reduced headache frequency. The TTS was significantly reduced in the group treated with the appliance. The amplitude of P2 response elicited by stimulation of pericranial zones showed a reduction after amitriptyline treatment. Both therapies were effective in reducing headache severity, the appliance with a prevalent action on the pericranial muscular tenderness, amitriptyline reducing the activity of the central cortical structures subtending pain elaboration Conclusion The results of this study may suggest that in CTTH both the interventions at the peripheral and central levels improve the outcome of headache.

  13. Evaluation of effective dose equivalent on student's practice on intra-oral dental radiography

    International Nuclear Information System (INIS)

    We tried to discuss the problems on radiological protection of students in the practice of technique of intra-oral radiography with use of classmates. This radiographic practice has been performed after the technical training use of 'DXTTR' as a preclinical training. The practice was performed as training to take peri-apical, bite-wing, occlusal and eccentric projections. The mean film numbers which were used to complete those technique were 56 films. In these practice, dosimetries were performed on six locations of the body surface of every student who was taken radiograms using thermoluminescent dosimeters (TLD). The measured locations were orbit, bilateral submandible, neck, chest and abdomen. The effective dose equivalent was estimated using weighting factors of International Comission on Radiological Protection (ICRP) pub. 26 and the values of tissue dose equivalent obtained by TLD measurements. The results showed that the mean value of dose equivalent of each part was 5.40 mSv at orbit, 5.06 mSv at submandible, 0.75 mSv at neck, 0.04 mSv at chest and 0.02 mSv at abdomen. The maximum value of effective equivalent dose was 17.03 mSv which was lower than the dose equivalent limit for workers (50 mSv/year) recommended by ICRP pub. 26. The mean value of effective dose equivalent was 2.36 mSv. ICRP recommended the radiation protection for students aged 18 years or over that the procedures for restricting exposure should be broadly similar to those for occupational exposure. So the results indicate that those training was considered to be controlled in some reasonable level. The mean value of risk was estimated to be 3.94 x 10-5. Because intra-oral radiographic training with use of classmates is performed under extreme non-uniform irradiation, the evaluation of effective dose equivalent was considered to be important to control this special educational exposure and useful for optimization of the educational programs of radiographic technical training. (author)

  14. Dispersión del QRS como índice de disincronía en el bloqueo de rama izquierda y de sincronía tras la terapia de resincronización cardíaca, una variable de respuesta exitosa / QRS dispersion as an index of dyssynchrony in left bundle branch block and of

    OpenAIRE

    Elibet Chávez González; Alain Alonso Herrera; Raimundo Carmona Puerta; Damián Pérez Cabrera; Ramiro R Ramos Ramírez; Walker Gómez Paima; Francisco L Moreno-Martínez

    2015-01-01

    Introducción: En pacientes con insuficiencia cardíaca, el bloqueo de rama izquierda del haz de His constituye un importante marcador de mal pronóstico, en ellos la tera-pia de resincronización puede mejorar la función del ventrículo izquierdo. Objetivo: Describir variables electrocardiográficas asociadas a una mejor respuesta de la resincronización cardíaca. Método: Se estudiaron 19 pacientes, 7 mujeres y 12 hombres con bloqueo de rama izquierda y fracción de eyección ≤ 35 %. Se realizó elect...

  15. Duración y calidad de la analgesia postoperatoria después del bloqueo del plexo braquial para cirugía del hombro: ropivacaína 0,5% frente a ropivacaína 0,5% con clonidina

    OpenAIRE

    Esteves, S; Sa, P.; Figueiredo, D.; Souto, A

    2002-01-01

    Resumen OBJETIVOS: Algunos estudios han demostrado que la duración de los bloqueos nerviosos realizados con anestésicos locales puede ser prolongada con clonidina. En este estudio evaluamos la duración y la calidad de la analgesia proporcionada por el bloqueo del plexo braquial por vía interescalénica para cirugía del hombro, comparando la ropivacaína 0,5% con la ropivacaína 0,5% asociada a clonidina. PACIENTES Y MÉTODOS: Treinta pacientes fueron distribuidos en ...

  16. Interaction between intra-oral cinnamaldehyde and nicotine assessed by psychophysical and physiological responses.

    Science.gov (United States)

    Jensen, Tanja K; Andersen, Michelle V; Nielsen, Kent A; Arendt-Nielsen, Lars; Boudreau, Shellie A

    2016-08-01

    Cinnamaldehyde and nicotine activate the transient receptor potential subtype A1 (TRPA1) channel, which may cause burning sensations. This study investigated whether cinnamaldehyde modulates nicotine-induced psychophysical and physiological responses in oral tissues. Healthy non-smokers (n = 22) received, in a randomized, double-blind, crossover design, three different gums containing 4 mg of nicotine, 20 mg of cinnamaldehyde, or a combination thereof. Assessments of orofacial temperature and blood flow, blood pressure, heart rate, taste experience, and intra-oral pain/irritation area and intensity were performed before, during, and after a 10-min chewing regime. Cinnamaldehyde increased the temperature of the tongue and blood flow of the lip, and was associated with pain/irritation, especially in the mouth. Nicotine increased the temperature of the tongue and blood flow of the cheek, and produced pain/irritation in the mouth and throat. The combination of cinnamaldehyde and nicotine did not overtly change the psychophysical or physiological responses. Interestingly, half of the subjects responded to cinnamaldehyde as an irritant, and these cinnamaldehyde responders reported greater nicotine-induced pain/irritation areas in the throat. Whether sensitivity to cinnamaldehyde can predict the response to nicotine-induced oral irritation remains to be determined. A better understanding of the sensory properties of nicotine in the oral mucosa has important therapeutic implications because pain and irritation represent compliance issues for nicotine replacement products.

  17. 35-mm film scanner as an intraoral dental radiograph digitizer. I: A quantitative evaluation.

    Science.gov (United States)

    Shrout, M K; Potter, B J; Yurgalavage, H M; Hildebolt, C F; Vannier, M W

    1993-10-01

    A 35-mm slide scanner digital imaging system was tested for its suitability in digitizing intraoral dental radiographic film for quantitative studies. The system (Nikon model LS-3510AF Nikon Electronic Imaging, Nikon, Inc., Melville, N.Y.) uses a charge-coupled device linear photodiode array. The data content in the original film images was evaluated, and the system performance assessed objectively with the use of specially designed test films. Radiometric and geometric performances for the digitizing system were extracted from measurements and observations, and these were compared with published data for two other film digitizing systems (video camera DAGE MTI, Michigan City, Ind. and Barneyscan 35-mm film digitizer Barneyscan, Berkeley, Calif.). The techniques used to evaluate this system are easy and suitable for evaluation of any digitizing system. This scanner system (Nikon) was superior to previously evaluated systems in transforming and recording radiographic film densities across the range (0.3 to 2.0 optical density units) of clinically relevant optical densities. The scanner offers substantial advantage over the other digitizing systems for gray scale information from clinically important optical densities. PMID:8233432

  18. Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism

    Directory of Open Access Journals (Sweden)

    Chun-Ming Chen

    2015-01-01

    Full Text Available Objective. To investigate the factors affecting intraoperative hemorrhage and postoperative sequelae after orthognathic surgery. Materials and Methods. Eighty patients with mandibular prognathism underwent surgical mandibular setback with intraoral vertical ramus osteotomy (IVRO. The correlation between the blood loss volume and postoperative VAS with the gender, age, and operating time was assessed using the t-test and Spearman rank correlation coefficient. The correlation between the magnitude of mandibular setback with the presence of TMJ clicking symptoms and lip sensation was also assessed. Results. The mean operating time and blood loss volume for men and women were 249.52 min and 229.39 min, and 104.03 mL and 86.12 mL, respectively. The mean VAS in men and women was 3.21 and 2.93, and 1.79 and 1.32 on the first and second postoperative days. There is no gender difference in the operating time, blood loss, VAS, TMJ symptoms, and lip numbness. The magnitude of mandibular setback was not correlated with immediate and long-term postoperative lip numbness. Conclusion. There are no gender differences in the intraoperative hemorrhage and postoperative sequelae (pain, lip numbness, and TMJ symptoms. In addition, neither symptom was significantly correlated with the amount of mandibular setback.

  19. An intraoral miniature x-ray tube based on carbon nanotubes for dental radiography

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyun Jin; Kim, Hyun Nam; Raza, Hamid Saeed; Park, Han Beom; Cho, Sung Oh [Dept. of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of)

    2016-06-15

    A miniature X-ray tube based on a carbon-nanotube electron emitter has been employed for the application to a dental radiography. The miniature X-ray tube has an outer diameter of 7 mm and a length of 47 mm. The miniature X-ray tube is operated in a negative high-voltage mode in which the X-ray target is electrically grounded. In addition, X-rays are generated only to the teeth directions using a collimator while X-rays generated to other directions are shielded. Hence, the X-ray tube can be safely inserted into a human mouth. Using the intra-oral X-ray tube, a dental radiography is demonstrated where the positions of an X-ray source and a sensor are reversed compared with a conventional dental radiography system. X-ray images of five neighboring teeth are obtained and, furthermore, both left and right molar images are achieved by a single X-ray shot of the miniature X-ray tube.

  20. Evaluation of X-Ray Protective Measurements in Intraoral Radiography Equipped Centers in Yazd

    Directory of Open Access Journals (Sweden)

    D.Goodarzi Pour

    2005-02-01

    Full Text Available Statement of Problem: A few decades have past from using radiographic technology as an accurate paraclinical method and always protective measurements is applicated against ionizing radiation. As dentalradiography is a routine procedure in dentistry the importance of protective strategies is clear.Propose: The aim of this descriptive study is to evaluate the protection principles in centers which haveintraoral radiographic devices in Yazd.Material and Methods: We have considered all three aspects of practitioner, environment and patientprotection using questionnaire and visiting those centers.Results: 33/7% of dental offices ,10 clinics ,3 institution and faculty of dentistry had intraoral radiographicequipments. Stablishment of protection principles for radiographer was favorable. 7.7% of centers had x-ray room with leaded walls, 23.1% had curtain , in 69/2% of centers radiographers stood in correct position anddistance while taking radiograph. Regarding to protection of environment, beams leakage control in 23.1% dental offices, 70% of clinics, all institution and faculty of dentistry have done.Conclusion: Non of the centers used rectangular localizator, thyroid shield, film holder and just some centers used leaded apron in specific circumstances. We have concluded that patient protection constitute less consideration. Generally lack of protective consideration is related to deficient knowledge of operators. Lackof information about protection equipments causes decrease of demanding of these tools and ultimately lack of these equipments in the market.

  1. Influence of physical parameters on radiation protection and image quality in intra-oral radiology

    Energy Technology Data Exchange (ETDEWEB)

    Belinato, W. [Instituto Federal de Ensino Basico, Tecnico e Tecnologico da Bahia, Av. Amazonas, 1350-45030-220, Zabele, Vitoria da Conquista, BA (Brazil); Departamento de Fisica, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, 49100-000 Rosa Elze, Sao Cristovao, SE (Brazil); Souza, D.N., E-mail: divanizi@ufs.br [Departamento de Fisica, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, 49100-000 Rosa Elze, Sao Cristovao, SE (Brazil)

    2011-10-01

    In the world of diagnostic imaging, radiography is an important supplementary method for dental diagnosis. In radiology, special attention must be paid to the radiological protection of patients and health professionals, and also to image quality for correct diagnosis. In Brazil, the national rules governing the operation of medical and dental radiology were specified in 1998 by the National Sanitary Surveillance Agency, complemented in 2005 by the guide 'Medical radiology: security and performance of equipment.' In this study, quality control tests were performed in public clinics with dental X-ray equipment in the State of Sergipe, Brazil, with consideration of the physical parameters that influence radiological protection and also the quality of images taken in intra-oral radiography. The accuracy of the exposure time was considered acceptable for equipment with digital timers. Exposure times and focal-spot size variations can lead to increased entrance dose. Increased dose has also been associated with visual processing of radiographic film, which often requires repeating the radiographic examination.

  2. A directly converting high-resolution intra-oral X-ray imaging sensor

    CERN Document Server

    Spartiotis, K; Schulman, T; Puhakka, K; Muukkonen, K

    2003-01-01

    A digital intra-oral X-ray imaging sensor with an active area of 3.6x2.9 cm sup 2 and consisting of six charge-integrating CMOS signal readout circuits bump bonded to one high-resistivity silicon pixel detector has been developed and tested. The pixel size is 35 mu m. The X-rays entering the sensor window are converted directly to electrical charge in the depleted detector material yielding minimum lateral signal spread and maximum image sharpness. The signal charge is collected on the gates of the input field effect transistors of the CMOS signal readout circuits. The analog signal readout is performed by multiplexing in the current mode independent of the signal charge collection enabling multiple readout cycles with negligible dead time and thus imaging with wide dynamic range. Since no intermediate conversion material of X-rays to visible light is needed, the sensor structure is very compact. The analog image signals are guided from the sensor output through a thin cable to signal processing, AD conversio...

  3. Intraoral Temperature Triggered Shape-Memory Effect and Sealing Capability of A Transpolyisoprene-Based Polymer

    Directory of Open Access Journals (Sweden)

    Gakuji Tsukada

    2015-11-01

    Full Text Available In dentistry, pure gutta-percha (trans-1,4-polyisoprene (TPI is widely used as a main component of root canal filling materials. TPI has an interesting shape memory formed through cross-linking, and this characteristic is expected to be very effective for development of novel dental treatments; in particular, modification of the shape recovery temperature to the intraoral temperature (37 °C will enhance the applicability of the shape-memory effect of TPI in root canal filling. In this study, trial test specimens consisting of varying proportions of TPI, cis-polyisoprene, zinc oxide, stearic acid, sulfur and dicumyl peroxide were prepared and the temperature dependence of their shape recovery, recovery stress and relaxation modulus were measured. Additionally, their sealing abilities were tested using glass tubing and a bovine incisor. As the ratio of cross-linking agent in the specimens increased, a decrease in recovery temperature and an increase in recovery stress and recovery speed were observed. In addition, the test specimen containing the highest concentration of cross-linking agent showed superior sealing ability under a thermal stimulus of 37 °C in both sealing ability tests.

  4. Hypofractionated electron irradiation using intraoral cones (ERT-IOC) in the treatment of oral cavity cancers

    International Nuclear Information System (INIS)

    Forty-nine patients with squamous cell carcinomas in the oral cavity underwent hypofractionated electron irradiation with intraoral cone (ERT-IOC). ERT-IOC was performed mostly once a week with a fractional dose of 10-30 Gy and total dose of ERT-IOC ranged from 10-60 Gy. In 31 patients, external X-ray radiotherapy (EXRT) was also delivered. Local control was obtained at 5 years in only 32.5% and 32.8% of T1 and T2 lesions, respectively. No clear-cut correlations between local control and dose, TDF and biologically effective dose (BED) of ERT-IOC and EXRT were demonstrated, although in T1 lesions BED necessary to control the primary lesions appeared to increase proportionally to the total treatment time. In more advanced primary lesions, there could not be such relationships, possibly due to the improper treatment technique. The incidence of radiation induced injuries was high. Our study revealed that hypofractionated ERT-IOC is a dangerous alternative to the conventional therapy with brachytherapy. (author)

  5. Intra-oral cone radiation therapy for selected carcinomas of the oral cavity

    International Nuclear Information System (INIS)

    A study of 101 patients with early carcinomas of the oral cavity, T1 and T2, treated by external cobalt 60 beam and/or intra-oral cone (IOC) radiation therapy between 1964 through 1980 was made. The two year disease-free survival rate, including surgical salvage, was 88% and the local control rate was 85%. The incidence of radiation complications, i.e., soft tissue ulceration and/or osteoradionecrosis, was 14% and varied with various tumor sites and radiation doses delivered. The present review shows that local control and radiation complications are closely related to radiation doses and varies with different tumor sites of the oral cavity. Radiation therapy dosages expressed in terms of TDF values for these lesions are herein recommended. With proper selections of lesions arising from the oral cavity, combined external beam and IOC radiation therapy has been found extremely efficacious in achieving good local tumor control and high survival rates with excellent cosmetic and functional results and minimum radiation sequalae

  6. Influence of physical parameters on radiation protection and image quality in intra-oral radiology

    Science.gov (United States)

    Belinato, W.; Souza, D. N.

    2011-10-01

    In the world of diagnostic imaging, radiography is an important supplementary method for dental diagnosis. In radiology, special attention must be paid to the radiological protection of patients and health professionals, and also to image quality for correct diagnosis. In Brazil, the national rules governing the operation of medical and dental radiology were specified in 1998 by the National Sanitary Surveillance Agency, complemented in 2005 by the guide "Medical radiology: security and performance of equipment." In this study, quality control tests were performed in public clinics with dental X-ray equipment in the State of Sergipe, Brazil, with consideration of the physical parameters that influence radiological protection and also the quality of images taken in intra-oral radiography. The accuracy of the exposure time was considered acceptable for equipment with digital timers. Exposure times and focal-spot size variations can lead to increased entrance dose. Increased dose has also been associated with visual processing of radiographic film, which often requires repeating the radiographic examination.

  7. Síndrome doloroso regional complejo tipo 1: Tratamiento mediante bloqueos simpáticos y más... Complex regional pain syndrome type I: Management with sympathetic blockade and other therapies…

    OpenAIRE

    B. Garrido; L. Fernández-Suárez; Bosch, F.; M. C. Rabí; M. Hernández-Arteaga

    2005-01-01

    Introducción: El síndrome doloroso regional complejo tipo 1 (SDRC-I) cursa con una fase aguda de inflamación neurogénica regional, que conduce a una fase crónica de desórdenes neuropáticos. La participación del sistema nervioso simpático en su génesis y mantenimiento es significativa, pero no exclusiva. De ahí la importancia de un tratamiento precoz y multifactorial, dirigido a los mecanismos fisiopatológicos. Objetivos: Estudiar el uso de los bloqueos simpáticos, asociados a otros procederes...

  8. Síndrome de Horner y bloqueo del plexo braquial ipsilateral en un caso de analgesia epidural para el trabajo del parto Horner´s sydrome and ipsilateral brachial plexus block during an epidural analgesia labour procedure

    OpenAIRE

    J. Avellanosa; Vera, J.; P. Morillas; E. Gredilla; F. Gilsanz

    2006-01-01

    El Síndrome de Horner es una complicación de la anestesia epidural que aparece más frecuentemente en pacientes obstétricas debido a los cambios fisiológicos y anatómicos propios del embarazo; sin embargo, su incidencia es baja, y sólo se han descrito dos casos previos asociando un bloqueo del plexo braquial. Presentamos el caso de una gestante de 23 años que precisó analgesia epidural para el trabajo de parto. Tras comprobar la correcta colocación del catéter se administró una dosis inicial e...

  9. Riscos cardiovasculares do bloqueio androgênico Riesgos cardiovasculares del bloqueo androgénico Cardiovascular risks of androgen deprivation therapy

    Directory of Open Access Journals (Sweden)

    Adriano Freitas Ribeiro

    2010-09-01

    Full Text Available O adenocarcinoma de próstata é o câncer mais comum no sexo masculino após o câncer de pele. Entre as várias formas de tratamento do câncer de próstata, a terapia de bloqueio androgênico é uma modalidade consagrada nos pacientes com doença metastática ou localmente avançada, que provavelmente resulta em aumento de sobrevida. No entanto, o bloqueio androgênico é causador de uma série de consequências adversas. Complicações como osteoporose, disfunção sexual, ginecomastia, anemia e alterações na composição corporal são bem conhecidas. Recentemente, uma série de complicações metabólicas foi descrita como aumento da circunferência abdominal, resistência à insulina, hiperglicemia, diabete, dislipidemia e síndrome metabólica com consequente aumento do risco de eventos coronarianos e mortalidade cardiovascular nessa população específica. Este artigo de atualização apresenta uma revisão bibliográfica realizada no MEDLINE de toda literatura publicada em inglês no período de 1966 até junho de 2009, com as seguintes palavras-chave: androgen deprivation therapy, androgen supression therapy, hormone treatment, prostate cancer, metabolic syndrome e cardiovascular disease, no intuito de analisar quais seriam os reais riscos cardiovasculares da terapia de deprivação androgênica, também chamada bloqueio androgênico, nos pacientes com câncer de próstata.El adenocarcinoma de próstata es el cáncer más común en el sexo masculino después del cáncer de piel. Entre las varias formas de tratamiento del cáncer de próstata, la terapia de bloqueo androgénico es una modalidad consagrada en los pacientes con enfermedad metastásica o localmente avanzada, que probablemente resulta en aumento de sobrevida. Mientras tanto, el bloqueo androgénico es causante de una serie de consecuencias adversas. Complicaciones como osteoporosis, disfunción sexual, ginecomastia, anemia y alteraciones en la composición corporal son

  10. Optimum image compression rate maintaining diagnostic image quality of digital intraoral radiographs

    Energy Technology Data Exchange (ETDEWEB)

    Song, Ju Seop; Koh, Kwang Joon [Dept. of Oral and Maxillofacial Radiology and Institute of Oral Bio Science, School of Dentistry, Chonbuk National University, Chonju (Korea, Republic of)

    2000-12-15

    The aims of the present study are to determine the optimum compression rate in terms of file size reduction and diagnostic quality of the images after compression and evaluate the transmission speed of original or each compressed images. The material consisted of 24 extracted human premolars and molars. The occlusal surfaces and proximal surfaces of the teeth had a clinical disease spectrum that ranged from sound to varying degrees of fissure discoloration and cavitation. The images from Digora system were exported in TIFF and the images from conventional intraoral film were scanned and digitalized in TIFF by Nikon SF-200 scanner(Nikon, Japan). And six compression factors were chosen and applied on the basis of the results from a pilot study. The total number of images to be assessed were 336. Three radiologists assessed the occlusal and proximal surfaces of the teeth with 5-rank scale. Finally diagnosed as either sound or carious lesion by one expert oral pathologist. And sensitivity and specificity and kappa value for diagnostic agreement was calculated. Also the area (Az) values under the ROC curve were calculated and paired t-test and oneway ANOVA test was performed. Thereafter, transmission time of the image files of the each compression level were compared with that of the original image files. No significant difference was found between original and the corresponding images up to 7% (1:14) compression ratio for both the occlusal and proximal caries (p<0.05). JPEG3 (1:14) image files are transmitted fast more than 10 times, maintained diagnostic information in image, compared with original image files. 1:14 compressed image file may be used instead of the original image and reduce storage needs and transmission time.

  11. Effect of laser pointer on students\\\\\\' levels of technical errors during intraoral radiographs

    Directory of Open Access Journals (Sweden)

    Farshid Shams

    2015-12-01

    Full Text Available Background and Aims: According to concerns of technical errors in intraoral radiographs and reports of positive effects of central ray laser pointer on the students, technical errors and shortcomings of earlier research, this study was conducted at Department of Oral and Maxillofacial Radiology of Tehran Azad University to determine the role and use of laser pointer in the technical error made by students. Materials and Methods: This clinical trials study was carried out at the Department of Radiology, Dental School of Azad Tehran University. A total of eighty students were divided into two groups of forty. In the first group the periapical technique was taught without laser guided indicator, while in the second group laser guided indicator was applied in training the students. All students took X-rays from the phantoms. Laser guided indicator is made of one low power red laser diodes.Totally 560 X-rays were taken and the technical errors and the quality of X-rays were evaluated. Data were analyzed statistically using Mann-Whitney and Chi Square tests (&alpha=0.05. Results: The X-rays taken by students showed significant differences in cone cutting (P<0.001, and overlapping (P<0.001 between the two study groups. In the subjective review of X-ray quality, the difference was also significant (P=0.03. Conclusion: The use of laser guided indicator as a training aid seems to be practical for easier learning of central ray adjustment and reduction of technical errors in taking X-rays by dental students.

  12. An estimation of the percentage of dose in intraoral radiology exams using Monte Carlo simulation

    International Nuclear Information System (INIS)

    In this work we used the EGS4 code in a simulated study of dose percentage in intraoral examination to 10 energy range to 140 keV. The simulation was carried out on a model consisting of different geometry (cheek, tooth and mouth cavity) under normal incidence X-ray beam over the surface of the various simulated materials. It was observed that for energy smaller than 30 keV most of the energy is deposited on the cheek. In 30 keV there is a point of maximum radiation absorption in the tooth (approximately 60% of the energy of the incident radiation is deposited on the tooth) in relation to other simulated materials. It means that in this energy there is a better contrast in the radiographic image of the tooth and a smaller dose on the cheek. In 40 keV the deposited energy in the tooth is roughly equal to the energy that is transmitted (to the radiographic film or buccal cavity) causing a degradation in the radiographic image and/or a higher dose in the oral cavity. For energies above 40 keV, the amount of energy transmitted (to the oral cavity and/or radiographic film) is higher than the energy deposited in other materials, i.e, it only contributes to increasing of dose in the regions close to the oral cavity and the radiographic image degradation. These results can provide important information for radiological procedures applied in dentistry where the image quality is a relevant factor to a dental evaluation needs as well as reducing dose in the oral cavity.

  13. Optimum image compression rate maintaining diagnostic image quality of digital intraoral radiographs

    International Nuclear Information System (INIS)

    The aims of the present study are to determine the optimum compression rate in terms of file size reduction and diagnostic quality of the images after compression and evaluate the transmission speed of original or each compressed images. The material consisted of 24 extracted human premolars and molars. The occlusal surfaces and proximal surfaces of the teeth had a clinical disease spectrum that ranged from sound to varying degrees of fissure discoloration and cavitation. The images from Digora system were exported in TIFF and the images from conventional intraoral film were scanned and digitalized in TIFF by Nikon SF-200 scanner(Nikon, Japan). And six compression factors were chosen and applied on the basis of the results from a pilot study. The total number of images to be assessed were 336. Three radiologists assessed the occlusal and proximal surfaces of the teeth with 5-rank scale. Finally diagnosed as either sound or carious lesion by one expert oral pathologist. And sensitivity and specificity and kappa value for diagnostic agreement was calculated. Also the area (Az) values under the ROC curve were calculated and paired t-test and oneway ANOVA test was performed. Thereafter, transmission time of the image files of the each compression level were compared with that of the original image files. No significant difference was found between original and the corresponding images up to 7% (1:14) compression ratio for both the occlusal and proximal caries (p<0.05). JPEG3 (1:14) image files are transmitted fast more than 10 times, maintained diagnostic information in image, compared with original image files. 1:14 compressed image file may be used instead of the original image and reduce storage needs and transmission time.

  14. Evaluation of dental expertise with intra-oral peri-apical view radiographs for forensic identification

    Directory of Open Access Journals (Sweden)

    Kanwalpreet Kaur Bhullar

    2014-01-01

    Full Text Available Background: Identification of a dead person is important in starting the investigation into the circumstances of death. In the absence of forensic odontologist, it is vital that general dentists are able to compare the ante mortem-post mortem (AM-PM records and with their ability, correctly interpret the individuality of the person. Aims: This study wascarried out to find out the accuracy with which undergraduate, graduate and post-graduate dentists can do this comparison, using the simulated AM-PM intra-oral peri-apical (IOPA view radiographs. Setting and Design: A total of 60 investigators of which 20 undergraduate students, 20 general dentists, 20 post-graduate dentists viewed 10 pairs of simulated AM and PM radiographs and recorded their findings. Materials and Methods: Ten pairs of simulated AM-PM IOPA view radiographs were given to 60 dentists to investigate their discriminatory potential for dental identification purposes. The results were statistically analyzed. Statistical Analysis: χ2 -test and Mann-Whitney U-test were carried out to compare the sensitivity, specificity and accuracy of the three types of examiners (UG, G, PG. Results: The results showed sensitivity of 59.8%, specificity of 62.6%, accuracy of 61% for undergraduate students, sensitivity of 86.6%, specificity of 87.5%, accuracy of 87% for graduate doctors, sensitivity of 89.3%, specificity of 92.3% and accuracy of 90.5% for post-graduate doctors respectively. Conclusion: Inexperienced investigators in forensic identification showed fairly acceptable results, therefore, introduction of forensic odontology in an undergraduate course may help general dentists to provide better service, if required, in the absence of a forensic odontologist.

  15. Intraoral laser welding: ultrastructural and mechanical analysis to compare laboratory laser and dental laser.

    Science.gov (United States)

    Fornaini, Carlo; Passaretti, Francesca; Villa, Elena; Rocca, Jean-Paul; Merigo, Elisabetta; Vescovi, Paolo; Meleti, Marco; Manfredi, Maddalena; Nammour, Samir

    2011-07-01

    The Nd:YAG laser has been used since 1970 in dental laboratories to weld metals on dental prostheses. Recently in several clinical cases, we have suggested that the Nd:YAG laser device commonly utilized in the dental office could be used to repair broken fixed, removable and orthodontic prostheses and to weld metals directly in the mouth. The aim of this work was to evaluate, using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and dynamic mechanical analysis (DMA), the quality of the weld and its mechanical strength, comparing a device normally used in dental laboratory and a device normally used in the dental office for oral surgery, the same as that described for intraoral welding. Metal plates of a Co-Cr-Mo dental alloy and steel orthodontic wires were subjected to four welding procedures: welding without filler metal using the laboratory laser, welding with filler metal using the laboratory laser, welding without filler metal using the office laser, and welding with filler metal using the office laser. The welded materials were then analysed by SEM, EDS and DMA. SEM analysis did not show significant differences between the samples although the plates welded using the office laser without filler metal showed a greater number of fissures than the other samples. EDS microanalysis of the welding zone showed a homogeneous composition of the metals. Mechanical tests showed similar elastic behaviours of the samples, with minimal differences between the samples welded with the two devices. No wire broke even under the maximum force applied by the analyser. This study seems to demonstrate that the welds produced using the office Nd:YAG laser device and the laboratory Nd:YAG laser device, as analysed by SEM, EDS and DMA, showed minimal and nonsignificant differences, although these findings need to be confirmed using a greater number of samples. PMID:20437262

  16. Radiografia intraoral e convencional da hemiarcada superior direita de gatos domésticos

    Directory of Open Access Journals (Sweden)

    A.C. Nepomuceno

    2013-02-01

    Full Text Available A proposta com este trabalho foi avaliar a hemiarcada superior direita de gatos domésticos por meio de técnicas radiográficas odontológicas do paralelismo, empregando-se filmes intraorais aos posicionadores de Han Shin. As imagens obtidas por essa metodologia foram correlacionadas com as técnicas radiográficas convencionais (extraorais, com o intuito de se estabelecerem vantagens ou desvantagens para detectar possíveis afecções dentais e periodontais. Foram utilizados 30 gatos, sem raça definida, 17 machos e 13 fêmeas, faixa etária entre um e três anos, confinados em gatis do Departamento de Zootecnia da Universidade Federal de Lavras/MG. Com os animais sob anestesia geral, foram realizadas radiografias da hemiarcada superior direita, incluindo três incisivos, um canino, três pré-molares e um molar em radiografias intraorais e extraorais. As imagens radiográficas foram analisadas e efetuaram-se comparações qualitativas entre pares intraorais e convencionais dos mesmos animais. Para se estabelecer a técnica radiográfica dental mais bem adaptada, foram realizadas análises estatísticas pelo teste de McNemar (qui-quadrado modificado. A técnica intraoral mostrou ser superior à extraoral (P<0,05, para achados referentes a espaço periodontal aumentado, canal radicular amplo e arredondamento de ápice, e também para a avaliação mais bem detalhada de dentes caninos, pré-molares e molares em gatos.

  17. Prognostic factors for oral tongue carcinoma treated with intra-oral cone electron beam irradiation

    International Nuclear Information System (INIS)

    Twenty-five patients with squamous cell carcinoma of the oral tongue were treated with intra-oral cone electron beam irradiation (IOC) during the period from 1985 to 1995. We analyzed the prognostic factors for local control and complications. IOC was applied for T1 (16 cases) and T2 (9 cases) tumors. Hypofractionation was used for IOC (20, 10, or 8 Gy/fr, 1f/ wk). The total dose delivered ranged from 40 Gy to 78 Gy. Radiation dose homogenization was done through calculation of the normalized total dose (NTD) for α/β=10 (tumor) and α/β=3 (late normal tissue). The two-year local control rates for T1 and T2 were 80.4% and 77.8%, respectively. The two-year local control rates for patients whose overall treatment time (OTT) was ≤ 28 days (n=16) was 100% vs. 41.7% for patients whose OTT was >28 days (n=9) (p=0.002). Multivariate analysis was applied to identify possible prognostic factors for local control, OTT (p=0.02) was the only variable that significantly influenced local control. The incidence of radiation ulcer was 33.3% (7/21). Significant indicators of ulceration were fraction size (>>10 Gy) and NTD (α/β=3) (>>130 Gy) (p<0.05). These results indicate that prolonged OTT was the major reason for the failure of IOC radiotherapy to control local disease and that the relatively high rate of ulceration was due to large fraction size and high NTD (α/β=3). (author)

  18. Results of electron beam therapy using intra-oral cone for carcinoma of the oral tongue

    International Nuclear Information System (INIS)

    Retrospective analyses were performed to evaluate the therapeutic efficacy of intra-oral cone (IOC) radiation therapy for carcinoma of the oral tongue, especially about its faculty of local control and complications. Thirty-nine patients with squamous cell carcinoma of the oral tongue were treated with IOC radiation therapy alone or in combination with external irradiation. IOC radiation therapy was given not only for T1 and T2, but also for T3 tumors. Hypofractionation was used for IOC radiation therapy. The 2 year local control rates, including surgical salvage, for T1, T2, T3 and T4 were 100%, 73.3%, 40% and 0%, respectively. The 5 year actuarial survival rates for Stage I, II, III and IV were 100%, 65.3%, 35.4% and 0%, respectively. The incidences of radiation complications, i.e. soft tissue ulceration and osteoradionecrosis, were 42.9% and 2.9%, respectively. It is suggested that relatively high rate of soft tissue ulceration was due to hypofractionation. We have found summated Gy dosage correlate better than summated TDF values for both local control and complication rates for IOC radiation therapy with hypofractionation method. If complete disappearance of primary tumor was not achieved after IOC radiation therapy of 30 Gy, it is not reasonable to add external irradiation. Surgical resection of the residual tumor is the treatment of choice in view of local control and complication. These results suggest that selection of the cases suitable for IOC is important and re-evaluation of the adequate fractionation scheme for IOC is necessary. (author)

  19. Nilai Radiometrik Direct Digital Intraoral Radiography (DDIDR Kualitas Tulang Rahang Mandibula

    Directory of Open Access Journals (Sweden)

    Hanna H. Bachtiar Iskandar

    2015-09-01

    Full Text Available Complete diagnosis in dentistry needs more detail and accurate quantitative as well as qualitative jawbone trabeculation evaluation. This requires modern diagnostic radiography that in Indonesia are still very limited. One form of the periodontitis that demands more attention and detailed information due to the great efforts to overcome, is Rapidly Progressive Periodontitis, and thus this disease has chosen as a model in this study. The objective of this study to get more detail and accurate radiometric of Direct Digital Intraoral value from grading Conventional value. This method expected to be a model of studies on jawbone quality in dentistry. The healting RPP patients as a subjects of this study. The methods trabeculation density from mandibular DDIR and conventional periapical radiographs of 116 healthy subjects and 41 RPP patients were evaluated and correlated to obtain transformation formula in the form of regression function. This study was performed Clinic of Dental Radiology and Periodontology, Faculty of Dentistry, University of Indonesia function were then used as a method to obtain quantitative data from conventional radiographs available. The results were indicated a significant independent variables were included in the regression function (p<0.05. Therefore even no DDIR equipment available, this transformation enable dentists all over Indonesia with only conventional radiographs available, to obtain more detail quantitative trabeculation density data. The conclusion is apart from getting a methode to transform conventional radiographic data into radiometric data equal to data obtained from DDR that more detail and accurate, this study also provides the normal radiographic trabeculation density value of peron 20 – 40 years as data base for further studies.

  20. The effect of rare-earth filtration on organ doses in intraoral radiography

    Energy Technology Data Exchange (ETDEWEB)

    Asako, Satoshi; Satoh, Kenji; Furumoto, Keiichi (Nippon Dental Univ., Tokyo (Japan))

    1994-08-01

    Filters of rare-earth elements such as lanthanum (La, Z=57), samarium (Sm, Z=62), gadolinium (Gd, Z=64) and erbium (Er, Z=68) are frequently used in radiography for the purpose of reducing the patient dose by eliminating low-energy and high-energy X-rays which are not involved in imaging. It is useful to evaluate the dose reduction achieved by these rare-earth filters in terms of organ dose, and the effective dose equivalent, which is used for evaluating carcinogenic risks and hereditary effects of X-ray irradiation, for the purpose of optimizing the radiographic technique and radiation protection. Therefore, we calculated the organ dose and effective dose equivalent during intraoral radiography of the maxillary incisor region by simulation using samarium or erbium, typical rare-earth elements, in filtration. We evaluated the effects of these metals in dose reduction. When samarium or erbium, 0.1 mm thick, was used in added filtration at tube voltage of 60, 70, 80 and 90 kV, the time required for radiography almost doubled, respectively. The organ dose at each tube voltage was the largest in the parathyroid and thyroid glands, followed by bone surfaces and the optic lenses, skin, red bone marrow and salivary glands, larynx, and brain, in that order. The organ dose at sites other than the larynx and brain decreased as the quality of the incident X-ray beam was hardened. When samarium or erbium was added at each voltage, the effective dose equivalent was reduced by about 20% to 45%. Erbium was more effective than samarium in reducing the effective dose equivalent, and either of the two elements decreased its effectiveness with an increase in tube voltage. (author) 43 refs.

  1. Surgical management of a large complex odontoma of the mandibular angle-ramus region through intra-oral buccal approach--A case report.

    Science.gov (United States)

    Ogunlewe, M O; Adeyemo, W L; Ladeinde, A L; Bamgbose, B O; Ajayi, O F

    2005-12-01

    Large complex odontomas of the jaws are rare. A report of a large complex odontoma of the mandibular angle-ramus region enucleated through intra-oral buccal approach is presented. A review of the literature on different modalities of treatment is also undertaken. A large expansile complex odontoma of the angle-ramus region of the mandible was excised through an intraoral buccal approach under general anaesthesia. Recovery and immediate post-operative period were uneventful. There was no altered sensation in the distribution of the inferior alveolar nerve and lingual nerve; and wound healing was satisfactory. Post-operative radiograph 2 years after the operation showed satisfactory bone regeneration. Intraoral buccal approach to large complex odontomas of the angle-ramus region of the mandible is a relatively safe procedure with minimal complication.

  2. Effects of short-term training on behavioral learning and skill acquisition during intraoral fine motor task

    DEFF Research Database (Denmark)

    Kumar, Abhishek; Grigoriadis, Joannis; Trulsson, Mats;

    2015-01-01

    movements. Thirty healthy volunteers were asked to intraorally manipulate and split a chocolate candy, into two equal halves. The participants performed three series (with ten 10 trials) of the task before and after a short-term (approximately 30min) training. The accuracy of the split and vertical jaw...... task induces behavior learning, skill acquisition and optimization of jaw movements in terms of better performance and reduction in the duration of jaw movements, during the task. The finding of the present study provides insights on into how humans learn oral motor behaviors or the kind of adaptation...

  3. Use of PID and Iterative Learning Controls on Improving Intra-Oral Hydraulic Loading System of Dental Implants

    Science.gov (United States)

    Huang, Yi-Cheng; Chan, Manuel; Hsin, Yi-Ping; Ko, Ching-Chang

    This study presents the control design and tests of an intra-oral hydraulic system for quantitatively loading of a dental implant. The computer-controlled system was developed and employed for better pressure error compensation by PID (proportional-integral-derivative) control and point-to-point iterative learning algorithm. In vitro experiments showed that implant loading is precisely controlled (error 3%) for 0.5Hz loading without air inclusion, and reasonably performed (errorvivo animal studies for better understanding of how bone responds to implant loading. Quantitative information derived from this biomechanical model will add to improved designs of dental implants.

  4. Intra-oral low level laser therapy in chronic maxillary sinusitis: A new and effective recommended technique

    Science.gov (United States)

    Mortazavi, Hamed; Khalighi, Hamidreza; Goljanian, Ali; Mojahedi, Saeed; Sabour, Siamak

    2015-01-01

    Background Chronic sinusitis is one of the most common chronic diseases involving different age groups. Because the nature and etiology of chronic sinusitis are not completely known, there is not any standard treatment for this disease. It has been suggested that low-level laser can be used in treating chronic sinusitis but there are limited studies about its usage. In this research, intra-oral radiation of low-level laser has been described and implemented for the first time. Suggested hypotheses about the efficacy of this type of radiation (intra-oral) in treating chronic maxillary sinusitis includes this fact that the depth of maxilla’s vestibule is also the floor of maxillary sinus and sinus discharges collect in this area because of gravity effect. Therefore, with considering suitable radiation angle, this area gets the most benefits of laser’s anti-inflammatory effects. Material and Methods In this study, 20 patients with chronic maxillary sinusitis were included. They were assessed before and after treatment. Treatment plan was performed in 8 sessions every other days using low-level diode laser with 810 nm. Snot-22 questionnaire and rhinomanometry were used for evaluating patients. Changes of signs and symptoms were recorded in questionnaire every session and 6 months after treatment. Friedman and Wilcoxon tests were used for data analyses. In this study, P value < 0.05 was considered statistically significant. Results All variables and all symptoms of patients were improved using intra-oral low-level laser and this improvement was statistically significant (P value<0.05). There was also significant decrease in nasal airway resistance and significant increase in air flow (P value<0.05). Six month after treatment completion, there was no significant difference between the results of completion and the results of 8th treatment session (P value< 0.05). Conclusions Using intra-oral low-level laser is a suitable way to treat patients with chronic maxillary

  5. Controle da dor pós-operatória da artroplastia total do joelho: é necessário associar o bloqueio do nervo isquiático ao bloqueio do nervo femoral? Control del dolor postoperatorio de la artroplastia total de la rodilla: ¿es necesario asociar el bloqueo del nervio isquiático al bloqueo del nervio femoral? Control of postoperative pain following total knee arthroplasty: is it necessary to associate sciatic nerve block to femoral nerve block?

    Directory of Open Access Journals (Sweden)

    Affonso H. Zugliani

    2007-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A artroplastia total do joelho (ATJ promove grande trauma tecidual, produzindo intensa dor no pós-operatório. A analgesia pós-operatória de boa qualidade é fundamental, devendo-se considerar que a mobilização articular precoce é um importante aspecto para obtenção de bons resultados. Há controvérsias na literatura sobre a eficácia do bloqueio isolado do nervo femoral. O objetivo deste estudo foi avaliar a analgesia pós-operatória com a associação do bloqueio dos nervos isquiático e femoral. MÉTODO: Foram estudados 17 pacientes submetidos à ATJ sob raquianestesia, divididos em dois grupos: A e B. No Grupo A (n = 9 foi realizado bloqueio do nervo femoral e no Grupo B (n = 8, bloqueio dos nervos femoral e isquiático. Os bloqueios foram realizados no pós-operatório imediato utilizando-se 20 mL de ropivacaína a 0,5% em cada um. A dor foi aferida nas primeiras 24 horas pela Escala Analógica Visual e escala verbal. Foi observado o tempo decorrido entre os bloqueios e a primeira queixa de dor (M1. RESULTADOS: A mediana do tempo de analgesia (M1 no Grupo A foi de 110 min. e no Grupo B de 1.285 min. (p = 0,0001. Não foram observadas complicações atribuíveis às técnicas utilizadas. CONCLUSÃO: O bloqueio do nervo isquiático, quando associado ao bloqueio do nervo femoral, nas condições deste estudo, melhorou de maneira significativa a qualidade da analgesia pós-operatória da ATJ.JUSTIFICATIVA Y OBJETIVOS: La artroplastia total de la rodilla (ATR promueve gran trauma del tejido produciendo un intenso dolor en el postoperatorio. La analgesia de postoperatorio de buena calidad es fundamental, debiendo considerar que la movilización articular precoz es un importante aspecto para la obtención de buenos resultados. Existen controversias en la literatura sobre la eficacia del bloqueo aislado del nervio femoral. El objetivo de este estudio fue evaluar la analgesia en postoperatorio con la asociaci

  6. Evaluation of the composition of filters additional of equipment radiological intraoral by energy dispersive x-ray fluorescence (EDXRF)

    Energy Technology Data Exchange (ETDEWEB)

    Franca, Alana Caroline; Torres, Catarina A.M.P.; Rocha, Ana S.S.; Deniak, Valeriy; Lara, Alessandro L.; Paschuk, Sergei A., E-mail: alanacarolinef@gmail.com, E-mail: sergei@utfpr.edu.br [Universidade Tecnologica Federal do Parana (CPGEI/UTFPR), Curitiba, PR (Brazil). Programa de Pos-Graduacao em Engenharia Eletrica e Informatica Industrial; Fernandes, Angela; Westphalen, Fernando Henrique, E-mail: angelafernandes@ufpr.br [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Setor de Ciencias da Saude

    2013-07-01

    The need for high quality standards for radiographic images in order to make a diagnosis assertive, and being the additional filtration required in the intraoral X-ray equipment show the need of evaluating these filters. This study aims to examine the influence of the elemental composition of the filters of X-ray of dental intraoral equipment in the radiographic images quality. The filters analysis were performed by using the energy dispersive X-ray fluorescence method (EDXRF). Ten conventional filters were analysed. In this study, 33 radiographic exposures were performed using films: twenty radiographs in the incisor region and ten in the molar region, three exposures were also made in the same regions with same conditions without using filter. After radiographs development, optical density was measure and all radiographs were submitted to subjective evaluation by dental radiologists. Data obtained were correlated to effects evaluation of the elemental composition of all filters in the quality of the radiographic images. The elements found were: aluminum, cobalt, copper, sulfur, iron, manganese, titanium, zinc, and zirconium. The images obtained were identified in groups: Molars to 0.3 s; Incisors to 0.2 s; Incisors to 0.3 s, and for the group without filters. From the results obtained it was concluded that both unclear radiographs and ideal radiographs were produced by using filters of elementary common. Therefore, conventional filters evaluated were an acceptable option to produce quality images in dental radiology, despite differences in the composition of the alloys. (author)

  7. Possible involvement of convergent nociceptive input to medullary dorsal horn neurons in intraoral hyperalgesia following peripheral nerve injury.

    Science.gov (United States)

    Terayama, Ryuji; Tsuchiya, Hiroki; Omura, Shinji; Maruhama, Kotaro; Mizutani, Masahide; Iida, Seiji; Sugimoto, Tomosada

    2015-04-01

    Previous studies demonstrated that the number of c-Fos protein-like immunoreactive (c-Fos-IR) neurons in the medullary dorsal horn (MDH) evoked by noxious stimulation was increased after peripheral nerve injury, and such increase has been proposed to reflect the development of neuropathic pain state. The aim of this study was to examine the MDH for convergent collateral primary afferent input to second order neurons deafferented by peripheral nerve injury, and to explore a possibility of its contribution to the c-Fos hyperinducibility. Double immunofluorescence labeling for c-Fos and phosphorylated extracellular signal-regulated kinase (p-ERK) was performed to detect convergent synaptic input. c-Fos expression and the phosphorylation of ERK were induced by the intraoral application of capsaicin and by electrical stimulation of the inferior alveolar nerve (IAN), respectively. The number of c-Fos-IR neurons in the MDH induced by the intraoral application of capsaicin was increased after IAN injury, whereas the number of p-ERK immunoreactive neurons remained unchanged. The number of double-labeled neurons, that presumably received convergent primary afferent input from the lingual nerve and the IAN, was significantly increased after IAN injury. These results indicated that convergent primary nociceptive input through neighboring intact nerves may contribute to the c-Fos hyperinducibility in the MDH and the pathogenesis of neuropathic pain following trigeminal nerve injury. PMID:25407627

  8. Evaluation of the composition of filters additional of equipment radiological intraoral by energy dispersive x-ray fluorescence (EDXRF)

    International Nuclear Information System (INIS)

    The need for high quality standards for radiographic images in order to make a diagnosis assertive, and being the additional filtration required in the intraoral X-ray equipment show the need of evaluating these filters. This study aims to examine the influence of the elemental composition of the filters of X-ray of dental intraoral equipment in the radiographic images quality. The filters analysis were performed by using the energy dispersive X-ray fluorescence method (EDXRF). Ten conventional filters were analysed. In this study, 33 radiographic exposures were performed using films: twenty radiographs in the incisor region and ten in the molar region, three exposures were also made in the same regions with same conditions without using filter. After radiographs development, optical density was measure and all radiographs were submitted to subjective evaluation by dental radiologists. Data obtained were correlated to effects evaluation of the elemental composition of all filters in the quality of the radiographic images. The elements found were: aluminum, cobalt, copper, sulfur, iron, manganese, titanium, zinc, and zirconium. The images obtained were identified in groups: Molars to 0.3 s; Incisors to 0.2 s; Incisors to 0.3 s, and for the group without filters. From the results obtained it was concluded that both unclear radiographs and ideal radiographs were produced by using filters of elementary common. Therefore, conventional filters evaluated were an acceptable option to produce quality images in dental radiology, despite differences in the composition of the alloys. (author)

  9. Comparison of antibacterial-coated and non-coated suture material in intraoral surgery by isolation of adherent bacteria

    Directory of Open Access Journals (Sweden)

    Klaus Pelz

    2015-09-01

    Full Text Available Objectives. In general surgery the incidence of postoperative wound infections is reported to be lower using triclosan-coated sutures. In intraoral surgery, sutures are faced with different bacterial species and the question arises whether the antibacterial-coated suture material has the same positive effects. Materials and Methods. Triclosan-coated and uncoated suture materials were applied in 17 patients undergoing wisdom tooth extraction. Postoperatively, sutures were removed and adherent bacteria were isolated, colony-forming units (cfu were counted, and species identified. Results. Oral bacteria were found in high numbers (cfu>10[sup]7[/sup] on both Vicryl and the triclosan-coated Vicryl Plus. The total number of bacteria isolated from Vicryl Plus was 37% higher than for Vicryl, mainly due to increased numbers of anaerobes. The number of bacterial strains identified was higher for Vicryl ( n=203 than for Vicryl Plus (n=198, but the number of pathogens was higher on Vicryl Plus (n=100 than on Vicryl (n=97. Fewer Gram-positive strains were found on Vicryl Plus (n=95 than on Vicryl (n=107 and, conversely, more Gram-negative strains on Vicryl Plus (103vs.96. Conclusions. In terms of the total number of oral bacteria, and especially oral pathogens, that adhered to suture material, no reduction was demonstrated for Vicryl Plus. The use of triclosan-coated suture material offers no advantage in intraoral surgery.

  10. Development and verification of a novel device for dental intra-oral 3D scanning using chromatic confocal technology

    Science.gov (United States)

    Zint, M.; Stock, K.; Graser, R.; Ertl, T.; Brauer, E.; Heyninck, J.; Vanbiervliet, J.; Dhondt, S.; De Ceuninck, P.; Hibst, R.

    2015-03-01

    The presented work describes the development and verification of a novel optical, powder-free intra-oral scanner based on chromatic confocal technology combined with a multifocal approach. The proof of concept for a chromatic confocal area scanner for intra-oral scanning is given. Several prototype scanners passed a verification process showing an average accuracy (distance deviation on flat surfaces) of less than 31μm +/- 21μm and a reproducibility of less than 4μm +/- 3μm. Compared to a tactile measurement on a full jaw model fitted with 4mm ceramic spheres the measured average distance deviation between the spheres was 49μm +/- 12μm for scans of up to 8 teeth (3- unit bridge, single Quadrant) and 104μm +/- 82μm for larger scans and full jaws. The average deviation of the measured sphere diameter compared to the tactile measurement was 27μm +/- 14μm. Compared to μCT scans of plaster models equipped with human teeth the average standard deviation on up to 3 units was less than 55μm +/- 49μm whereas the reproducibility of the scans was better than 22μm +/- 10μm.

  11. Use of intraoral miniplates to control postoperative occlusion after high condylectomy for the treatment of condylar hyperplasia.

    Science.gov (United States)

    Chepla, Kyle J; Cachecho, Cyrine; Hans, Mark G; Gosain, Arun K

    2012-03-01

    Mandibular condylar hyperplasia is a rare disorder, characterized by unilateral mandibular overgrowth with overeruption of the dentition on the affected side. Although the etiology is unclear, multiple surgical techniques have been described to correct the associated mandibular bone, occlusal, and soft tissue deformities. Often a condylectomy, to arrest mandibular growth, is combined with various orthognathic procedures to restore occlusion and facial harmony. Here we report our technique of isolated high condylectomy with simultaneous intraoral placement of maxillary and mandibular miniplates. Each plate has an intraoral extension that allows our orthodontists to develop vertical force vectors to intrude the maxillary and mandibular molar segments. Using this combined surgical and orthodontic technique, we were able to postoperatively control the occlusal cant, restore the dental midline, improve facial aesthetics, and resolve the patient's contralateral temporomandibular joint dysfunction without concomitant orthognathic surgery. As a result of our findings, we are currently using, and would recommend, this technique for patients requiring surgical-orthodontic intervention for other conditions. PMID:22421836

  12. The functional intraoral Glasgow scale in floor of mouth carcinoma: longitudinal assessment of 62 consecutive patients.

    Science.gov (United States)

    Ellabban, Mohamed A; Shoaib, Taimur; Devine, John; McMahon, Jeremy; Morley, Stephen; Adly, Osama A; Farrag, Sherif H; Moati, Taha A; Soutar, David

    2013-03-01

    The functional integrity of the floor of the mouth (FOM) is essential in maintaining tongue mobility, deglutition, and control and disposal of saliva. The present study focused on reporting oral function using functional intraoral Glasgow scale (FIGS) in patients who had surgical ablation and reconstruction of FOM carcinoma with or without chemo-radiotherapy. The study included patients who had surgical treatment of floor of mouth cancer in two regional head and neck units in Glasgow, UK between January 2006 and August 2007. Patients were assessed using FIGS before surgery, 2 months, 6 months and 1 year after surgery. It is a five-point scale self-questionnaire to allow patients to self-assess speech, chewing and swallowing. The maximum total score is 15 points. The influence of socio-demographic parameters, tumour characteristics and surgical parameters was addressed in the study. A total of 62 consecutive patients were included in the study; 41 (66.1 %) were males and 21 (33.9 %) were females. The patients' mean age at the time of diagnosis was 60.6 years. Fifty (80.6 %) patients had unilateral origin of FOM tumours and 10 (19.4 %) had bilateral origin. Peroral approach was the most common approach used in 35 (56.4 %) patients. The mean preoperative FIGS score was 14. Two months after surgery, it droped to 9.4 then started to increase gradually thereafter and recorded 10.1 at 6 months and 11 at 1 year. Unilateral FOM resection recorded better score than bilateral and lateral FOM tumours than anterior at 1 year postoperatively. Furthermore, direct closure showed better functional outcome than loco-regional and free flaps. The FIGS is a simple and comprehensive way of assessing a patient's functional impairment following surgery in the FOM. Tumour site and size, surgical access, surgical resection and method of reconstruction showed significant influence on oral function following surgical resection. A well-designed rehabilitation programme is required to improve

  13. Bloqueo caudal en dolor crónico lumbar: ¿Es necesario el apoyo radiológico para disminuir los fallos de la técnica?

    Directory of Open Access Journals (Sweden)

    M. Cortiñas Sáenz

    2012-08-01

    Full Text Available Introducción: las infiltraciones de esteroides epidurales no ofrecen beneficio a largo plazo en el tratamiento del dolor de espalda, pero pueden ser eficaces en los pacientes con dolor radicular lumbosacro agudo. Los bloqueos epidurales vía caudal de esteroides son eficaces en el alivio sintomático a corto plazo (evidencia de nivel II, así como a largo plazo (nivel de evidencia III. Objetivos: evaluar la eficacia del bloqueo caudal con y sin guía fluoroscópica. Material y métodos: estudio prospectivo, observacional y descriptivo para evaluar la tasa de fallos de la realización del bloqueo caudal mediante la técnica "a ciegas" respecto a la guiada por radiología. El análisis estadístico incluyó chi2 de Mantel y Haensel, t de Student y test ANOVA, considerándose una p Introduction: epidural steroid injections offer no long-term benefit for the treatment of low back pain but may be effective in the small subset of patients with acute lumbosacral radicular pain. Caudal epidural steroid injection was effective in producing short-term improvement (level II evidence as well as long-term relief (level III evidence. Objetives: to evaluate of the effectiveness of the caudal epidural block under fluoroscopic guidance. Material and methods: prospective, observational and descriptive study to assess the failure rates of caudal block using the technique "blind" with respect to radiological vision. Statistical comparisons were based on the chi2 test, the long-rank test, t test and ANOVA test, considering a statistically significant result p < 0.05. Results: we performed 129 caudal epidural blocks in 89 patients for chronic pain conditions. The overall success rate of caudal block with a blind technique was of 65.11%. Statistically significant differences in the rate of technical failure of the blind for the variables professional experience of the anesthesiologist and the presence of obesity. The most common malposition in our cohort is the

  14. WITHDRAWN: Clinical fitting of CAD/CAM zirconia single crowns generated from digital intraoral impressions based on active wavefront sampling.

    Science.gov (United States)

    Scotti, Roberto; Cardelli, Paolo; Baldissara, Paolo; Monaco, Carlo

    2011-10-17

    OBJECTIVES: The aim of this clinical trial was to test the accuracy of single all-ceramic zirconia crowns resulting from digital intraoral impressions with active wavefront sampling technology by measuring the marginal and internal fits of the crowns. MATERIALS AND METHODS: Thirty-seven teeth (24 anterior and 13 posterior) in fifteen patients were restored with single zirconia-ceramic crowns (Lava/Lava Ceram; 3M ESPE) generated from a digital intraoral scanner (Lava Chairside Oral Scanner; 3M ESPE). Before definitive insertion, silicone replicas were produced for all 37 crowns. The sample was cut in four sections; each section was evaluated in four points: marginal gap, mid-axial wall, axio-occlusal edge and centro-occlusal. A total of 592 measurements (148 for each evaluation point) was examined using stereomicroscopy with a magnification of 50×. The Mann-Whitney U test was used to evaluate whether there were differences between anterior and posterior values (alpha=0.05). RESULTS: The mean values for each point were: 48.65μm (SD 29.45μm) for the marginal gap, 112.25μm (SD 55.54μm) at the mid-axial wall, 137.81μm (SD 71.31μm) at the axio-occlusal edge of the abutments, and 157.25μm (SD 75.51μm) at the centro-occlusal location. No statistical differences were found between the anterior and posterior group for each point (p-values: P1=0.39; P2=0.38; P3=0.07; P4=0.30). CONCLUSIONS: The marginal and internal fitting values obtained were within literature agreed as clinically acceptable for both anterior and posterior teeth. CLINICAL RELEVANCE: Single crown restorations obtained using digital intraoral impressions based on active wavefront sampling technology presented enough accuracy to be used as an alternative to the conventional impression techniques. PMID:22027653

  15. Análisis de la eficacia y seguridad del bloqueo iliofascial continuo para analgesia postoperatoria de artroplastia total de rodilla Analysis of the efficiency and safety of the ileofascial block for postoperatory pain after total knee arthroplasty

    Directory of Open Access Journals (Sweden)

    J. López González

    2012-10-01

    Full Text Available Objetivo: la importancia del dolor agudo postoperatorio radica en su alta frecuencia, en su inadecuado tratamiento y en las repercusiones que tiene en la evolución y en la recuperación del paciente. El bloqueo iliofascial puede ser una técnica adecuada para analgesia postoperatoria en la artroplastia total de rodilla. El objetivo de este estudio es valorar la eficacia y seguridad del bloqueo iliofascial, en comparación con el bloqueo epidural, a efectos de analgesia postquirúrgica en pacientes sometidos a artroplastia total de rodilla bajo anestesia subaracnoidea. Se valoró además si la realización del bloqueo iliofascial es una técnica analgésica segura, las complicaciones derivadas de la misma, los efectos secundarios y el grado de satisfacción del paciente. Material y métodos: estudio multicéntrico, prospectivo, aleatorio, observacional, controlado, con evaluador ciego, en 54 pacientes, adultos, ASA I-III, de ambos sexos, sometidos a cirugía de artroplastia total de rodilla bajo anestesia intradural. Los pacientes incluidos en el estudio se dividieron en dos grupos, BIF y BE. En el grupo BIF (n = 27 se colocó un catéter iliofascial, mientras que en el otro grupo BE (n = 27 se colocó un catéter epidural lumbar (a nivel L3-L4, en ambos casos para la analgesia postoperatoria continua. Ambos grupos recibieron el mismo protocolo analgésico con paracetamol y metamizol pautados, y rescate con bolos de morfina intravenosa. Se utilizó t-Student para comparar las variables cuantitativas. Se consideró significativo (p Objective: the importance of acute postoperative pain lies in its high frequency, where inadequate treatment and the impact it has on the evolution and the patient's recovery. Iliofascial block may be a suitable technique for postoperative analgesia after total knee arthroplasty. The aim of this study is to assess the efficacy and safety of the blockade iliofascial compared with epidural analgesia in postoperative

  16. Virtual bite registration using intraoral digital scanning, CT and CBCT: In vitro evaluation of a new method and its implication for orthognathic surgery.

    Science.gov (United States)

    Nilsson, Johanna; Richards, Robert Geoff; Thor, Andreas; Kamer, Lukas

    2016-09-01

    Three-dimensional (3D) computer-assisted planning requires detailed visualisation of the craniomaxillofacial region and interocclusal relationship. The aim of this study was to establish and evaluate a method to create a 3D model of the craniomaxillofacial region and to adopt intraoral digital scanning to place the lower jaw into a centric relation (CR) without the need of additional plaster casts and model surgery. A standard plastic skull modified by metallic dental wires and brackets was subjected to computed tomography (CT), cone beam computed tomography (CBCT), and intraoral digital scanning. We evaluated two different virtual bite registrations, a digital scan of the buccal dental surfaces and scanning of the wax bites to position the lower jaw into a CR, and assessed the accuracy of the integration of intraoral scanning to the CT/CBCT scans. The mean registration error of corresponding mesh points for the CT and intraoral scanned images was 0.15 ± 0.12 mm, while this error was 0.18 ± 0.13 mm for the CBCT and intraoral scanned images. The mean accuracy of the two virtual bite registrations ranged from 0.41 to 0.49 mm (buccal scan technique) and from 0.65 to 1.3 mm (virtualised wax bite technique). A method for virtual bite registration was developed. It has the potential to eliminate plaster casts and model surgery and may facilitate 3D computer-assisted planning of orthognathic surgery cases. PMID:27423538

  17. Virtual bite registration using intraoral digital scanning, CT and CBCT: In vitro evaluation of a new method and its implication for orthognathic surgery.

    Science.gov (United States)

    Nilsson, Johanna; Richards, Robert Geoff; Thor, Andreas; Kamer, Lukas

    2016-09-01

    Three-dimensional (3D) computer-assisted planning requires detailed visualisation of the craniomaxillofacial region and interocclusal relationship. The aim of this study was to establish and evaluate a method to create a 3D model of the craniomaxillofacial region and to adopt intraoral digital scanning to place the lower jaw into a centric relation (CR) without the need of additional plaster casts and model surgery. A standard plastic skull modified by metallic dental wires and brackets was subjected to computed tomography (CT), cone beam computed tomography (CBCT), and intraoral digital scanning. We evaluated two different virtual bite registrations, a digital scan of the buccal dental surfaces and scanning of the wax bites to position the lower jaw into a CR, and assessed the accuracy of the integration of intraoral scanning to the CT/CBCT scans. The mean registration error of corresponding mesh points for the CT and intraoral scanned images was 0.15 ± 0.12 mm, while this error was 0.18 ± 0.13 mm for the CBCT and intraoral scanned images. The mean accuracy of the two virtual bite registrations ranged from 0.41 to 0.49 mm (buccal scan technique) and from 0.65 to 1.3 mm (virtualised wax bite technique). A method for virtual bite registration was developed. It has the potential to eliminate plaster casts and model surgery and may facilitate 3D computer-assisted planning of orthognathic surgery cases.

  18. Abordaje intraoral en el síndrome de Eagle: Presentación de un caso clínico Intraoral approach in Eagle syndrome: A case report

    Directory of Open Access Journals (Sweden)

    Javier Mareque Bueno

    2011-12-01

    Full Text Available El síndrome de Eagle es una patología infrecuente secundaria a la elongación de la apófisis estiloides y/o calcificación del ligamento estilo-hioideo. La mayoría de pacientes afectados no presentan sintomatología, aunque la presión ejercida por esta estructura morfológicamente alterada contra estructuras vecinas puede desencadenar una gran variedad de síntomas, incluyendo dolor cervicofacial, sensación de cuerpo extraño en la orofaringe, aumento en la secreción salival, cefalea y dificultad para la deglución, el habla o los movimientos de la lengua. Presentamos el caso de una paciente de 50 años de edad con el síndrome de Eagle. La tomografía computerizada en haz de cono confirmó la sospecha clínica. Como tratamiento se realizó la resección parcial de ambas apófisis estiloides mediante un abordaje intraoral. La presentación clínica, el diagnóstico diferencial y el tratamiento se describen en este artículo.Eagle syndrome is a rare condition resulting from either the elongation of the temporal styloid process or calcification of the stylohyoid ligament. Most patients are asymptomatic, but when this structure presses against other parts of the head and neck it can originate a wide range of symptoms, including cervico-facial pain, foreign body sensation in oropharynx, increased saliva secretion, headache and difficulty with swallowing, speaking and neck or tongue movements. The case of a 50-year-old woman with Eagle syndrome is reported. Cone-beam computed tomography (CBCT confirmed the clinical suspicion. The intraoral approach was used for the partial resection of both styloid processes. The clinical presentation, diagnosis, management and differential diagnosis are described.

  19. Treatment with a combination of intra-oral sensory stimulation and electropalatography in a child with severe developmental dyspraxia.

    Science.gov (United States)

    Lundeborg, Inger; McAllister, Anita

    2007-01-01

    This paper describes the use of a combination of intra-oral sensory stimulation and electropalatography (EPG) in the treatment of a case with severe developmental verbal dyspraxia. A multiple-baseline design was used. The treatment duration was 11 months and started when the subject was 5 years old. The efficacy of the treatment was assessed by calculations of percentage of correctly articulated words, percentage of consonants correct, percentage of phonemes correct and percentage of words correct. Intelligibility assessments were conducted by both naïve and expert listeners. The experts also assessed visual deviances in articulatory gestures from video recordings. Qualitative analysis of EPG data was made. The subject's speech was significantly improved by the treatment in all aspects. The results and their generalization to other cases of developmental verbal dyspraxia are discussed. PMID:17613788

  20. Medicine and ionizing rays: a help sheet in analysing risks in intra-oral dental radiology and applicable texts

    International Nuclear Information System (INIS)

    This document proposes a synthesis of useful knowledge for radioprotection in the case of intra-oral dental radiology. In the first part, several aspects are considered: the concerned personnel, the course of treatment procedures, the hazards, the identification of the risk associated with ionizing radiation, the risk assessment and the determination of exposure levels, the strategy to control the risks (reduction of risks, technical measures concerning the installation or the personnel, teaching and information, prevention and medical monitoring), and risk control assessment. A second part indicates the various applicable legal and regulatory texts (European directives, institutions in charge of radioprotection, general arrangements applicable to workers and patients, and regulatory texts concerning worker protection or patient protection against ionizing radiations)

  1. The efficacy of an intraoral fluoride-releasing system in irradiated head and neck cancer patients: a preliminary study.

    Science.gov (United States)

    Meyerowitz, C; Watson, G E

    1998-09-01

    This study compared the anticaries effectiveness of an intraoral fluoride-releasing system, or IFRS, with a standard regimen of daily application of a 1.1 percent neutral sodium fluoride gel in custom trays. Caries protection in subjects in the IFRS group was comparable to that in subjects in the 1.1 percent neutral sodium fluoride group. The subjects all had head or neck cancer and had received radiation therapy, but no more recently than three months before taking part in the study. Overall, IFRS devices were well-tolerated and patient satisfaction was high. The IFRS appears to offer several advantages over the daily application of fluoride gels in custom trays.

  2. Intraoral Vertical Ramus Osteotomy Improved the Stomatognathic Function in an Elderly Patient with Mandibular Protrusion:A Case Report

    Directory of Open Access Journals (Sweden)

    Ishihara,Yoshihito

    2010-10-01

    Full Text Available This article reports the successful surgical-orthodontic treatment of an elderly patient with dentofacial deformity and signs and symptoms of temporomandibular disorder (TMD. The patient was a 63-year-old woman with a concave profile due to mandibular protrusion. To correct skeletal deformities, the mandible was posteriorly repositioned by employing intraoral vertical ramus osteotomy (IVRO following presurgical orthodontic treatment. After active treatment for 31 months, the facial profile was significantly improved and satisfactory occlusion was achieved. In addition, TMD symptoms of clicking sounds on the left side and difficulty in mouth opening were resolved. Regarding the findings of magnetic resonance imaging, anterior disc displacement in the opening phase was improved in the temporomandibular joint on the left side. Furthermore, stomatognathic functions were also improved without any aggravation of age-related problems. In conclusion, surgical repositioning of the mandible using IVRO leads to both morphological and functional improvements even in elderly patients.

  3. The use of low-level laser therapy for controlling the gag reflex in children during intraoral radiography.

    Science.gov (United States)

    Elbay, Mesut; Tak, Önjen; Şermet Elbay, Ülkü; Kaya, Can; Eryılmaz, Kubilay

    2016-02-01

    The current literature suggests that low-level laser stimulation of the PC 6 acupuncture points may prevent gagging. This study aimed to determine if low-level laser therapy (LLLT) can reduce the gag reflex in children undergoing intraoral maxillary radiography. This randomized, controlled, double-blind clinical trial was conducted with 25 children with moderate-to-very severe gag reflexes who required bilateral periapical radiographic examination of the maxillary molar region. Children's anxiety levels were initially evaluated using Corah's Dental Anxiety Scale (DAS) to identify any possible relationship between gagging and anxiety. A control radiograph was taken of one randomly selected side in each patient after simulated laser application so that the patient was blinded to the experimental conditions (control group). Laser stimulation was then performed for the experimental side. A laser probe was placed on the Pericardium 6 (PC 6) acupuncture point on each wrist, and laser energy was delivered for 14 s (300 mW, energy density 4 J/cm(2)) at a distance of 1 cm from the target tissue. Following laser stimulation, the experimental radiograph was taken (experimental group). Gagging responses were measured using the Gagging Severity Criteria for each group. Data were analyzed using Spearman's rho correlations and Mann-Whitney U tests. Both mean and median gagging scores were higher in the control group than in the experimental group. Patients who were unable to tolerate the intraoral control radiography were able to tolerate the procedure after LLLT. Differences between gagging scores of the control and experimental groups were statistically significant (P = .000). There was no significant correlation between gagging severity and anxiety score (P > .05). A negative correlation was found between age and gagging score in the control group (P ˂ .05). Within the limitations of this study, LLLT of the PC 6 acupuncture points appears to be a useful technique

  4. Bloqueio do nervo frênico após realização de bloqueio do plexo braquial pela via interescalênica: relato de caso A bloqueo del nervio frénico después de la realización de bloqueo del plexo braquial por la vía interescalénica: relato de caso Phrenic nerve block after interscalene brachial plexus block: case report

    Directory of Open Access Journals (Sweden)

    Luis Henrique Cangiani

    2008-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Bloqueio do nervo frênico é um evento adverso do bloqueio do plexo braquial; entretanto, na sua maioria, sem repercussões clínicas importantes. O objetivo deste relato foi apresentar um caso em que ocorreu bloqueio do nervo frênico, com comprometimento ventilatório, em paciente com insuficiência renal crônica submetido a instalação de fístula arteriovenosa extensa, sob bloqueio do plexo braquial pela via perivascular interescalênica. RELATO DO CASO: Paciente do sexo masculino, 50 anos, tabagista, portador de insuficiência renal crônica em regime de hemodiálise, hipertensão arterial, hepatite C, diabetes mellitus, doença pulmonar obstrutiva crônica, a ser submetido à instalação de fístula arteriovenosa extensa no membro superior direito sob bloqueio de plexo braquial pela via interescalênica. O plexo braquial foi localizado com utilização do estimulador de nervo periférico. Foram injetados 35 mL de uma solução de anestésico local, constituída de uma mistura de lidocaína a 2% com epinefrina a 1:200.000 e ropivacaína a 0,75% em partes iguais. Ao final da injeção o paciente apresentava-se lúcido, porém com dispnéia e predomínio de incursão respiratória intercostal ipsilateral ao bloqueio. Não havia murmúrio vesicular na base do hemitórax direito. A SpO2 manteve-se em 95%, com cateter nasal de oxigênio. Não foi necessária instalação de métodos de auxílio ventilatório invasivo. Radiografia do tórax revelou que o hemidiafragma direito ocupava o 5° espaço intercostal. O quadro clínico foi revertido em três horas. CONCLUSÕES: O caso mostrou que houve paralisia total do nervo frênico com sintomas respiratórios. Apesar de não ter sido necessária terapêutica invasiva para o tratamento, fica o alerta para a restrição da indicação da técnica nesses casos.JUSTIFICATIVA Y OBJETIVOS: El bloqueo del nervio frénico es un evento adverso del bloqueo del plexo braquial, sin

  5. Bloqueo de ganglio de Gasser con Radiofrecuencia lesión VS glicerol intragasseriano para neuralgia trigeminal The gasser ganglion blockade with radiofrequency vs intragasserian glycerol in the management of trigeminal neuralgia

    Directory of Open Access Journals (Sweden)

    E. Hernández-Ruiz

    2008-04-01

    Full Text Available Introducción y Objetivo. En la neuralgia trigeminal hasta el momento no existe un tratamiento definitivo debido a la diferente respuesta a los diversos manejos por lo cuál ha sido para el médico un reto el cómo mejorar esta entidad. Se han diseñado diversas medidas de tratamiento dentro de las cuales en nuestro estudio evaluamos a 2 de estas. Técnicas quirúrgicas menores son métodos relativamente sencillos en manos hábiles del médico especialista experimentado en Algología Intervencionista. Comparamos el bloqueo de ganglio de Gasser con radiofrecuencia lesión vs bloqueo de ganglio de Gasser con glicerol intragasseriano. Material y métodos. En un estudio retrospectivo, observacional, comparativo, longitudinal. Se estudiaron un total de 58 pacientes con neuralgia trigeminal idiopática a los cuales se les realizó bloqueo de ganglio de Gasser, se dividieron en 2 grupos; los pacientes del Grupo I (23 pacientes, se les realizó bloqueo con Radiofrecuencia lesión, y al Grupo II (35 pacientes se les realizó bloqueo con glicerol intragasseriano, se evaluó intensidad del dolor mediante EVA, previo al procedimiento, inmediato, al mes, de 6 a 12 meses y de 12 a 24 meses. La frecuencia de recidiva y el intervalo de tiempo en la que se presentó, la incidencia de rebloqueo en tiempo y número de veces, la frecuencia de efectos secundarios. Resultados. No se observaron diferencias epidemiológicas entre ambos grupos. La rama trigeminal más afectada en el Grupo I fue V2- V3 52%, comparado con el Grupo II V2-V3 54.2%. La evolución del alivio al dolor se realizó mediante la Escala Visual Analógica (EVA realizando análisis estadístico mediante la prueba de U-Mann-Whitney la cuál fue significativa en la evaluación inmediata con una p: 0.01 Grupo I con EVA 0.82 y Grupo II un EVA 2.22, de 6-12 meses en el Grupo I con EVA 1.34 y Grupo II EVA 1.86 de 12-24 meses Grupo I EVA de 1.34 y Grupo II 1.55, no existiendo significancia estadística en

  6. Evaluation of a Removable Intraoral Soft Stabilization Splint for the Reduction of Headaches and Nightmares in Military PTSD Patients: A Large Case Series.

    Science.gov (United States)

    Moeller, Donald R

    2013-01-01

    This large case series reports the results of using a removable soft intraoral stabilization splint in the treatment of chronic headaches and chronic nightmares in 60 military post-traumatic stress disorder (PTSD) patients of the Vietnam, Desert Storm, Operation Iraqi Freedom, and Operation Enduring Freedom conflicts. Patient treatment criteria included meeting all of the following requirements: minimum of three headaches per week; minimum of three nightmares per week; minimum of three sleep interruptions per week; minimum of three intraoral or extraoral (craniofacial) trigger points; and previous PTSD diagnosis by the U.S. Army or Veterans Administration with duration of this disorder for a minimum of three years. Significant reduction (60%?90%) in headache and nightmare severity, intensity, and duration was obtained in 75% of the 44 patients who completed the three-month follow-up.

  7. Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning technique

    OpenAIRE

    Kim, Jae-Hong; Kim, Ki-Baek; Kim, Woong-Chul; Kim, Ji-Hwan; Kim, Hae-Young

    2014-01-01

    Objective This study aimed to evaluate the accuracy and precision of polyurethane (PUT) dental arch models fabricated using a three-dimensional (3D) subtractive rapid prototyping (RP) method with an intraoral scanning technique by comparing linear measurements obtained from PUT models and conventional plaster models. Methods Ten plaster models were duplicated using a selected standard master model and conventional impression, and 10 PUT models were duplicated using the 3D subtractive RP techn...

  8. A modified device for intraoral radiography to assess the distal osseous defects of mandibular second molar after impacted third molar surgery

    OpenAIRE

    Ana, Faria-Inocencio; Mercedes, Gallas-Torreira

    2011-01-01

    Purpose This article is to describe a modified device for intraoral radiography which was developed to obtain reproducible radiographic images for assessment of distal osseous defects of the mandibular second molar (2 Mm) after impacted third molar (3 Mm) surgery. Materials and Methods A commercial available alignment system for posterior region was modified by adding a reference gauge pin (millimetric) and threading a hollow acrylic cylinder at the ring of the radiographic positioner to atta...

  9. Completely digital approach to fabricating a crown under an existing partial removable dental prosthesis by using an intraoral digital scanner in a single appointment.

    Science.gov (United States)

    Lee, Ju-Hyoung

    2016-06-01

    Retrofitting a crown to an existing partial removable dental prosthesis (PRDP) is difficult, labor intensive, and time consuming. This article presents an alternative technique for fabricating a crown under an existing PRDP by using an intraoral digital scanner and computer-assisted design and computer-aided manufacturing (CAD/CAM) technology. This technique involves less human error and provides a well-fitting restoration. PMID:26809222

  10. Effects of amitriptyline and intra-oral device appliance on clinical and laser-evoked potentials features in chronic tension-type headache.

    Science.gov (United States)

    de Tommaso, M; Shevel, E; Libro, G; Guido, M; Di Venere, D; Genco, S; Monetti, C; Serpino, C; Barile, G; Lamberti, P; Livrea, P

    2005-05-01

    In the present study, we examined clinical and laser-evoked potentials (LEP) features in two groups of chronic tension-type headache (CTTH) patients treated with two different approaches: intra-oral appliance of prosthesis, aiming to reduce muscular tenderness, and 10 mg daily amitriptyline. Eighteen patients suffering from CTTH (IHS, 2004) participated in the study. We performed a basal evaluation of clinical features and LEPs in all patients (T0) vs. 12 age- and sex-matched controls; successively, patients were randomly assigned to a two-month treatment by amitriptyline or intra-oral device appliance. The later LEPs, especially the P2 component, were significantly increased in amplitude in the CTTH group. Both the intra-oral prosthesis and amitriptyline significantly reduced headache frequency. Total Tenderness Score was significantly reduced in the group treated by the prosthesis. The amplitude of P2 response elicited by stimulation of pericranial zones showed a reduction after amitriptyline treatment. The results of this study may confirm that pericranial tenderness is primarily a phenomenon initiating a self-perpetuating circuit, favoured by central sensitisation at the level of the cortical nociceptive areas devoted to the attentive and emotive compounds of pain. Both the interventions at the peripheral and central levels may interrupt this reverberating circuit, improving the outcome of headache.

  11. Exposure reduction in general dental practice using digital x-ray imaging system for intraoral radiography with additional x-ray beam filter

    International Nuclear Information System (INIS)

    To measure exposure reduction in general dental practice using digital x-ray imaging systems for intraoral radiography with additional x-ray beam filter. Two digital x-ray imaging systems, Pana Digital (Pana-Heraus Dental) and CDR (Schick Technologies), were applied for intraoral radiography in general dental practice. Due to the high sensitivity to x-rays, additional x-ray beam filters for output reduction were used for examination. An Orex W II (Osada Electric Industry) x-ray generator was operated at 60 kVp, 7 mA. X-ray output (air-kerma; Gy) necessary for obtaining clinically acceptable images was measured at 0 to 20 cm in 5 cm steps from the cone tip using an ionizing chamber type 660 (Nuclear Associates) and compared with those for Ektaspeed Plus film (Eastman Kodak). The Pana Digital system was used with the optional filter supplied by Pana-Heraus Dental which reduced the output to 38%. The exposure necessary to obtain clinically acceptable images was only 40% of that for the film. The CDR system was used with the Dental X-ray Beam Filter Kit (Eastman Kodak) which reduced the x-ray output to 30%. The exposure necessary to obtain clinically acceptable images was only 20% of that for the film. The two digital x-ray imaging systems, Pana Digital and CDR, provided large dose savings (60-80%) compared with Ektaspeed Plus film when applied for intraoral radiography in general dental practice. (author)

  12. Evaluation of effective dose equivalent on student's practice on intra-oral dental radiography

    Energy Technology Data Exchange (ETDEWEB)

    Wada, Shin-ichi; Hayama, Kazuhide; Toyama, Michio; Takase, Hiroshi (Nippon Dental Univ., Tokyo (Japan))

    1991-12-01

    We tried to discuss the problems on radiological protection of students in the practice of technique of intra-oral radiography with use of classmates. This radiographic practice has been performed after the technical training use of 'DXTTR' as a preclinical training. The practice was performed as training to take peri-apical, bite-wing, occlusal and eccentric projections. The mean film numbers which were used to complete those technique were 56 films. In these practice, dosimetries were performed on six locations of the body surface of every student who was taken radiograms using thermoluminescent dosimeters (TLD). The measured locations were orbit, bilateral submandible, neck, chest and abdomen. The effective dose equivalent was estimated using weighting factors of International Comission on Radiological Protection (ICRP) pub. 26 and the values of tissue dose equivalent obtained by TLD measurements. The results showed that the mean value of dose equivalent of each part was 5.40 mSv at orbit, 5.06 mSv at submandible, 0.75 mSv at neck, 0.04 mSv at chest and 0.02 mSv at abdomen. The maximum value of effective equivalent dose was 17.03 mSv which was lower than the dose equivalent limit for workers (50 mSv/year) recommended by ICRP pub. 26. The mean value of effective dose equivalent was 2.36 mSv. ICRP recommended the radiation protection for students aged 18 years or over that the procedures for restricting exposure should be broadly similar to those for occupational exposure. So the results indicate that those training was considered to be controlled in some reasonable level. The mean value of risk was estimated to be 3.94 x 10{sup -5}. Because intra-oral radiographic training with use of classmates is performed under extreme non-uniform irradiation, the evaluation of effective dose equivalent was considered to be important to control this special educational exposure and useful for optimization of the educational programs of radiographic technical training

  13. Anterior and posterior tibial anesthetic block in diabetic foot surgery. Bloqueo anestésico tibial anterior y posterior en la cirugía del pie diabético

    Directory of Open Access Journals (Sweden)

    Obdulio Rodríguez García

    2004-12-01

    Full Text Available Fundament: Diabetes Mellitus is a disease of high and increasing prevalence and its complications follow a parallel course. Its morbidity is derived from its own complications which are produced at a long or short term and peripheral vascular disease hihglights among them.Objective: to check the usefulness of the anterior and posterior blockade of the tibia for the surgery of the diabetic foot. Method: Prospective study carried out from January to December 2003 at the University Hospital ¨Dr. Gustavo Aldereguía Lima¨ to patients who are carriers of a diabetic foot and who were initially assisted at the service of Angiology and later at the service of Anesthesiology when the surgical procedures were decided. All the patients were applied an anterior and posterior blockade of the tibial nerve . The variables measured were: age, weight, height, surgical time, type of surgery, cardiac frequency medium arterial pressure, and classification of patients according to the American Association of Anesthesiology All the patients were applied a scale for assessing pain in three different moments.Result: There was a predominance of females . The blockade of the posterior tibial nerve with lidocaine 1 % in different points permitted the performance of the surgical techniques proposed. The anesthetic procedure was favorable, and economic since the patients did not requiere of the use of analgesic in the post operatory stage.

    Fundamento:La diabetes mellitus es una enfermedad de prevalencia alta y creciente, y sus complicaciones siguen un curso paralelo. Su morbilidad se deriva de las propias complicaciones que se producen a mediano y largo plazo, entre las que se destaca la enfermedad vascular periférica. Objetivo: Comprobar la utilidad del bloqueo tibial anterior y posterior para la cirugía del pie

  14. Calidad de vida de pacientes con cáncer de próstata en tratamiento con bloqueo androgénico continuo vs intermitente: estudio prospectivo mediante la aplicación del cuestionario CAVIPRES

    Directory of Open Access Journals (Sweden)

    C.R. Sierra Labarta

    2015-08-01

    Full Text Available Fundamento: El tratamiento con bloqueo androgénico intermitente (BAI pretende mejorar la calidad de vida de los pacientes con cáncer de próstata con los mismos resultados oncológicos que el bloqueo androgénico continuo (BAC. El presente trabajo compara la calidad de vida mediante la aplicación del cuestionario CAVIPRES entre dos grupos de pacientes, uno tratado con BAC y otro con BAI. Material y métodos: Se realizó un estudio longitudinal de 24 meses de duración que incluyó 114 pacientes. Tras 6 meses se aleatorizaron a ambos grupos de tratamiento (49 pacientes a BAC y 51 a BAI, controlándose posteriormente a los 6, 12 y 18 meses de aleatorizarlos. Se comparó la puntuación de los bloques de ítems y la puntuación global del cuestionario CAVIPRES entre ambos grupos de tratamiento y se estudió su variación a lo largo del tiempo. Resultados: Los pacientes con BAI presentaron mejor calidad de vida global que los pacientes con BAC (p=0,002. De los 5 bloques en los que se divide el cuestionario, el grupo BAI presentó mejor puntuación que el BAC en "Aspectos psicológicos" (p=0,009 y "Apoyo social y pareja" (p=0,008. El BAI mejoró la calidad de vida global de los pacientes a los 18 meses respecto al momento de la aleatorización (p=0,000, y la puntuación de "Vida Sexual" (p=0,000 y "Apoyo social y pareja" (p=0,002. El BAC no mejoró ni la calidad de vida global ni la puntuación de los diferentes bloques a largo del estudio (p>0,05. Conclusión: El BAI mejora la calidad de vida global de los pacientes a los 18 meses de la suspensión del tratamiento.

  15. Development of a contemporary animal model of Candida albicans-associated denture stomatitis using a novel intraoral denture system.

    Science.gov (United States)

    Johnson, Clorinda C; Yu, Alika; Lee, Heeje; Fidel, Paul L; Noverr, Mairi C

    2012-05-01

    Denture stomatitis (DS) is a fungal infection characterized by inflammation of the oral mucosa in direct contact with the denture and affects up to 50% of denture wearers. Despite the prevalence, very little is known about the role of fungal or host factors that contribute to pathogenesis. Recently, we developed a novel intraoral denture system for rodent research. This denture system consists of custom-fitted fixed and removable parts to allow repeated sampling and longitudinal studies. The purpose of this study was to use this denture system to develop a clinically relevant animal model of DS. To establish DS, rats were inoculated with pelleted Candida albicans, which resulted in sustained colonization of the denture and palate for 8 weeks postinoculation. Biofilm formation on the denture was observed by week 4 and on the palate by week 6 postinoculation. Rats were monitored for clinical signs of disease by assigning a clinical score after macroscopic examination of the palate tissue according to Newton's method. By week 4 postinoculation, the majority of inoculated rats with dentures exhibited a clinical score of 1 (pinpoint erythema). By week 6 and week 8 postinoculation, increasing percentages of rats exhibited a clinical score of 2 (diffuse erythema/edema). Histological analysis of palate tissue demonstrated progressively increasing inflammatory cell recruitment throughout the time course of the infection. Palatal biofilm formation was commensurate with development of palatal erythema, which suggests a role for biofilm in the inflammatory response.

  16. In vitro infrared thermography assessment of temperature peaks during the intra-oral welding of titanium abutments

    Science.gov (United States)

    Degidi, Marco; Nardi, Diego; Sighinolfi, Gianluca; Merla, Arcangelo; Piattelli, Adriano

    2012-07-01

    Control of heat dissipation and transmission to the peri-implant area during intra-oral welding is very important to limit potential damage to the surrounding tissue. The aim of this in vitro study was to assess, by means of thermal infrared imaging, the tissue temperature peaks associated with the thermal propagation pathway through the implants, the abutments and the walls of the slot of the scaffold, generated during the welding process, in three different implant systems. An in vitro polyurethane mandible model was prepared with a 7.0 mm v-shape slot. Effects on the maximum temperature by a single welding procedure were studied using different power supplies and abutments. A total of 36 welding procedures were tested on three different implant systems. The lowest peak temperature along the walls of the 7.0 mm v-shaped groove (31.6 ± 2 °C) was assessed in the specimens irrigated with sterile saline solution. The highest peak temperature (42.8 ± 2 °C) was assessed in the samples with a contemporaneous power overflow and premature pincers removal. The results of our study suggest that the procedures used until now appear to be effective to avoid thermal bone injuries. The peak tissue temperature of the in vitro model did not surpass the threshold limits above which tissue injury could occur.

  17. Nausea control by needling at acupuncture point Neiguan (PC6) during an intraoral impression-taking procedure.

    Science.gov (United States)

    Zotelli, Vera Lucia Rasera; Grillo, Cássia Maria; de Sousa, Maria da Luz Rosário

    2014-12-01

    The objective of this study was to evaluate the effectiveness of acupuncture point PC6 (Neiguan) in controlling nausea during intraoral impression taking. This study was conducted in Piracicaba, São Paulo, Brazil. The sample consisted of 33 adult volunteers with nausea, who were randomly divided into control and study groups, and treated with nonpenetrating sham acupuncture and real acupuncture, respectively, at acupoint PC6. The two groups had two maxillary impressions taken, one prior to acupuncture and the other after acupuncture. The nausea assessment was made using the visual analog scale, Gagging Severity Index (GSI), and Gagging Prevention Index. Volunteers' expectation that nausea would be reduced through acupuncture was also assessed. For statistical analysis, we used the t test and the Spearman correlation (p nausea was reduced in the real acupuncture group (p nausea were noted in both groups (p > 0.05). No correlation existed between the expected and the actual reductions in nausea. Our results indicate that acupoint PC6 was effective for controlling nausea during the maxillary impression-taking procedure. Patients' expectation did not influence the results.

  18. Hypofractionated electron irradiation using intraoral cones (ERT-IOC) in the treatment of the oral cavity cancers

    International Nuclear Information System (INIS)

    From 1974 through 1991, 93 patients with oral cavity malignancies underwent the hypofractionated electron irradiation using intraoral cones (ERT-IOC) weekly. In 30 of 93 patients, irradiated primary sites could be observed more than 600 days without operation and recurrence. The incidence of radiation injuries was analyzed in these 30 patients with 31 sites. The fractional dose of ERT-IOC ranged from 10 Gy to 30 Gy. In 18 patients external X-ray radiation (EXRT) with a conventional fractionation was additionally delivered. According to the criteria of Parsons, radiation injuries were classified into mild, moderately severe, and severe injury. Six injuries were mild, 7 moderately severe, and 3 severe. Clinically serious, moderately severe and severe injuries occurred only in the patients who were irradiated more than 30 Gy with ERT-IOC. No patients suffered from moderately severe and severe injuries when fractional dose of ERT-IOC was less than 15 Gy, while in greater fractional dose 10 out of 22 patients experienced moderately severe and severe injuries. The hypofractionated ERT-IOC developed radiation injuries in high incidence and is not suited to radical treatment of the oral cavity cancers. (author)

  19. Effects of short-term training on behavioral learning and skill acquisition during intraoral fine motor task.

    Science.gov (United States)

    Kumar, A; Grigoriadis, J; Trulsson, M; Svensson, P; Svensson, K G

    2015-10-15

    Sensory information from the orofacial mechanoreceptors are used by the nervous system to optimize the positioning of food, determine the force levels, and force vectors involved in biting of food morsels. Moreover, practice resulting from repetition could be a key to learning and acquiring a motor skill. Hence, the aim of the experiment was to test the hypothesis that repeated splitting of a food morsel during a short-term training with an oral fine motor task would result in increased performance and optimization of jaw movements, in terms of reduction in duration of various phases of the jaw movements. Thirty healthy volunteers were asked to intraorally manipulate and split a chocolate candy, into two equal halves. The participants performed three series (with 10 trials) of the task before and after a short-term (approximately 30 min) training. The accuracy of the split and vertical jaw movement during the task were recorded. The precision of task performance improved significantly after training (22% mean deviation from ideal split after vs. 31% before; Pfine motor task induces behavior learning, skill acquisition and optimization of jaw movements in terms of better performance and reduction in the duration of jaw movements, during the task. The finding of the present study provides insights into how humans learn oral motor behaviors or the kind of adaptation that takes place after a successful prosthetic rehabilitation. PMID:26162238

  20. Reversión del bloqueo neuromuscular residual por atracurio y vecuronio con dosis bajas de neostigmina Reversion of atracurium and vecuronium residual nondepolarising neuromuscular blockade with low doses of neostigmine

    Directory of Open Access Journals (Sweden)

    J.R. Ortiz-Gómez

    2006-08-01

    Full Text Available Objetivos. Comprobar la eficacia de dosis bajas de neostigmina en la reversión del bloqueo neuromuscular no despolarizante residual (BNM-R. Material y Métodos. Se realizó el trabajo con 119 pacientes adultos, ASA I-III, anestesiados con tiopental, fentanilo, O2-N2O-isoflurano y atracurio (n=62 o vecuronio (n=57. Se monitorizó el BNM-R mediante registro electromiográfico del adductor pollicis ante estímulo ulnar tipo tren de cuatro (TOF, considerando recuperación espontánea un TOF-Ratio 75%. En caso contrario se revertía el BNM-R en función del grado de bloqueo (0-1, 2, 3 ó 4 respuestas al TOF con neostigmina (0,035; 0,03; 0,025 ó 0,02 mg/kg y atropina (0,0175; 0,015; 0,0125 ó 0,01 mg/kg respectivamente. Se registró el tiempo de decurarización y los efectos secundarios. Resultados. Los grupos resultaron demográficamente homogéneos, con TOF-Ratio>75% el 25,8 (atracurio y 21,1% (vecuronio, mostrando el resto 0-1 respuestas al TOF (11,3 y 19,2%, 2 (6,5 y 11,5%, 3 (4,8 y 7,6% ó 4 respuestas (51,6 y 50% respectivamente, decurarizándose en 10,5±7 (atracurio y 10,3±6,4 min (vecuronio. Hubo predominio de efectos secundarios en el grupo del atracurio (p=0,027 a expensas de sialorrea, naúseas y vómitos. No se registró ningún caso de recurarización. Conclusiones. La reversión del BNM-R con dosis bajas de neostigmina y atropina ajustadas al grado de bloqueo es efectiva incluso en bloqueos profundos y reduce el riesgo de efectos secundarios de estos fármacos.Objectives. To assess the effectiveness of low doses of neostigmine in the reversion of residual nonpolarising neuromuscular blockade (RNMB. Material and methods. The work involved one hundred and nineteen adult patients, ASA I-III, anaesthetised with fentanyl, thiopental, O2-N2O-isoflurane and atracurium (n=62 or vecuronium (n=57. RNMB was monitored with continuous electromyography of adductor pollicis with TOF stimulation. When TOF-Ratio (TR < 75%, neostigmine 0.035, 0.03, 0

  1. Osteosíntesis intraoral asistida por endoscopia en las fracturas del proceso condilar de la mandíbula: revisión de 53 casos Endoscopically assisted intraoral osteosynthesis in mandibular condylar process fractures: a review of 53 cases

    OpenAIRE

    Carlos Cristobal Goizueta-Adame; Daniel Pastor-Zuazaga; Elena Agüero-de Dios; Cristina Sebastián-López

    2012-01-01

    Objetivos: La reducción anatómica con fijación rígida de la fractura extracapsular del cóndilo de la mandíbula es esencial para asegurar la correcta función articular. El abordaje intraoral ha demostrado ser una vía segura y de escasa morbilidad. Los autores revisan una serie de 53 pacientes con fracturas extracapsulares de cóndilo mandibular tratados mediante reducción abierta y fijación interna rígida a través de un acceso exclusivamente intraoral asistido por endoscopia. Material y métodos...

  2. The importance of team work of cytologist and surgeon in preoperative diagnosis of intraoral minor salivary gland tumours.

    Science.gov (United States)

    Ostović, Karmen Trutin; Luksić, Ivica; Virag, Miso; Macan, Darko; Müllers, Danko; Manojlović, Spomenka

    2012-11-01

    Tumours arising from oral minor salivary glands may exhibit an overlap of clinical and morphological features that may produce diagnostic and therapeutic dilemmas. The aim of this study is to asses the value of fine needle aspiration cytology (FNAC) in differentiation of benign and malignant tumours and to render a specific diagnosis. We evaluated the team work of surgeon and cytologist to improve diagnostic accuracy. Two steps are important for accuracy: sampling aspirate that should be done together by surgeon and cytologist and cytological microscopic analysis of the smears that should be performed by an experienced cytologist. The study included 132 patients with intraoral minor salivary gland tumours between 2002 and 2011. Adequate material was obtained from 121 (91.7%) patients. FNAC was usually performed by cytologist in a team with maxillofacial surgeon at cytology department that is more convenient for preparing the samples and especially for ROSE procedure (rapid-on site evaluation) of smears. In such a way the cytologist checked the adequacy of samples and decided whether some ancillary techniques should be used and therefore repeat FNAC. A total of 82 patients underwent surgery, 40 with malignant and 42 with benign tumours. Preoperative cytological diagnoses were compared with histopathological ones using histopathology as a gold standard. The most common benign tumour was pleomorphic adenoma and among malignant tumours adenoid cystic carcinoma. The most commonly affected site was the palate. The team work of surgeon and cytologist achieved specificity of 95.1%, sensitivity of 97.6% and diagnostic accuracy of 96.3%. We can conclude that although subclassification of some tumour types of salivary glands remains poor, FNAC is invaluable in patient triage and therefore should be considered in the first line investigations of these lesions by the cytologist and surgeon.

  3. Applying psychological theory to evidence-based clinical practice: identifying factors predictive of taking intra-oral radiographs.

    Science.gov (United States)

    Bonetti, Debbie; Pitts, Nigel B; Eccles, Martin; Grimshaw, Jeremy; Johnston, Marie; Steen, Nick; Glidewell, Liz; Thomas, Ruth; Maclennan, Graeme; Clarkson, Jan E; Walker, Anne

    2006-10-01

    This study applies psychological theory to the implementation of evidence-based clinical practice. The first objective was to see if variables from psychological frameworks (developed to understand, predict and influence behaviour) could predict an evidence-based clinical behaviour. The second objective was to develop a scientific rationale to design or choose an implementation intervention. Variables from the Theory of Planned Behaviour, Social Cognitive Theory, Self-Regulation Model, Operant Conditioning, Implementation Intentions and the Precaution Adoption Process were measured, with data collection by postal survey. The primary outcome was the number of intra-oral radiographs taken per course of treatment collected from a central fee claims database. Participants were 214 Scottish General Dental Practitioners. At the theory level, the Theory of Planned Behaviour explained 13% variance in the number of radiographs taken, Social Cognitive Theory explained 7%, Operant Conditioning explained 8%, Implementation Intentions explained 11%. Self-Regulation and Stage Theory did not predict significant variance in radiographs taken. Perceived behavioural control, action planning and risk perception explained 16% of the variance in number of radiographs taken. Knowledge did not predict the number of radiographs taken. The results suggest an intervention targeting predictive psychological variables could increase the implementation of this evidence-based practice, while influencing knowledge is unlikely to do so. Measures which predicted number of radiographs taken also predicted intention to take radiographs, and intention accounted for significant variance in behaviour (adjusted R(2)=5%: F(1,166)=10.28, pservice-level trial. Since psychological frameworks incorporate methodologies to measure and change component variables, taking a theory-based approach enabled the creation of a methodology that can be replicated for identifying factors predictive of clinical behaviour

  4. 口内入路髁突切除术的两种术式初探%Preliminary study of condylectomy via intraoral approach

    Institute of Scientific and Technical Information of China (English)

    王晓霞; 李自力; 伊彪; 梁成; 李阳; 王兴

    2012-01-01

    Objective Condylectomy was performed to treat condylar osteoma or hyperplasia.Introduced two methods of condylectomy via intraoral approach and evaluated their clinical results.Methods Thirty-five patients,aging from 22 to 57.21 years,were treated by condylectomy via intraoral approach,of which 21 were condyle osteoma,14 hemimandibular hyperplasia and condylar hyperplasia.Intraoral vertical ramus osteotomy (IVRO) were used in 32 patients and intraoral condylectomy via coronoid process resection was used in 3 patients.Results The treatment results including oral function and facial symmetry after the operation were good in all patients.The temporomandibular joint (TMJ) dysfunction syndrome alleviated or disappeared. The follow-up period was 6 months to 3 years,and no relapse of condylar osteoma or hyperplasia was found.The patients who had IVRO and TMJ reconstruction had some degree of transplanted bone resorption,and one patients had relapse of facial deformity. But the patients who had intraoral condylectomy via coronoid process resection only had mild condyle remodeling and no obvious bone resorption was noted. Conclusions The two methods of intraoral condylectomy introduced in this stugy can successfully correct the facial deformity and TMJ dysfunction caused by condylar osteoma or hyperplasia.But the surgeons need to have excellent surgical skills and careful selection of the indications.%目的 总结髁突切除术口内入路的两种术式及初步临床效果.方法 采用口内入路髁突切除术共治疗35例患者,年龄22~57岁,其中21例为髁突骨瘤,14例为半侧颌骨肥大畸形伴发的髁突良性肥大.32例经口内下颌升支垂直截骨入路,3例经口内喙突切除人路.结果 35例患者术后咬合关系及咬合功能、开口度、面部对称性恢复良好,颞下颌关节紊乱症状减轻或消失.术后随访6~36个月,32例口内下颌升支垂直截骨人路髁突切除术及关节重建的患者因游离移植的骨

  5. Analgesia pós-operatória para procedimentos cirúrgicos ortopédicos de quadril e fêmur: comparação entre bloqueio do compartimento do psoas e bloqueio perivascular inguinal Analgesia postoperatoria para procedimientos quirúrgicos ortopédicos de cadera y fémur: comparación entre bloqueo del compartimiento del psoas y bloqueo perivascular inguinal Postoperative analgesia for orthopedic surgeries of the hip and femur: a comparison between psoas compartment and inguinal paravascular blocks

    Directory of Open Access Journals (Sweden)

    Luiz Eduardo Imbelloni

    2006-12-01

    dos cinco nervos do plexo lombar.JUSTIFICATIVA Y OBJETIVOS: Este estudio evaluó la eficacia de la inyección única de bupivacaína a 0,25% en el compartimiento del psoas o perivascular inguinal a través del estimulador de nervios periféricos para analgesia postoperatoria en pacientes sometidos a intervenciones quirúrgicas ortopédicas. MÉTODO: Cien pacientes recibieron bloqueo del plexo lumbar a través del compartimiento del psoas y fueron comparados con 100 pacientes que recibieron bloqueo del plexo lumbar vía perivascular inguinal, identificados por el estimulador de nervios periféricos con la inyección de 40 mL bupivacaína a 0,25% sin epinefrina. La analgesia en los nervios ilioinguinal, genitofemoral, cutáneo femoral lateral, femoral y obturatorio fue evaluada a las 4, 8, 12, 16, 20 y 24 horas después del final de la intervención quirúrgica. La intensidad del dolor también fue medida en el mismo período. La cantidad de opioides administrada en el postoperatorio fue anotada. En cinco pacientes de cada grupo, un estudio radiográfico con contraste no iónico se realizó para medir la dispersión de la solución anestésica. RESULTADOS: Los nervios ilioinguinal, genitofemoral, cutáneo femoral lateral, femoral y obturatorio fueron bloqueados en 92% de los pacientes en el compartimiento del psoas versus 62% en el bloqueo perivascular inguinal. El bloqueo del plexo lumbar redujo la necesidad de opioides y 42% de los pacientes sometidos al bloqueo del compartimiento del psoas y 36% de los pacientes en el bloqueo inguinal no necesitaron analgésico adicional en el postoperatorio. La duración de la analgesia fue de aproximadamente 21 horas con el bloqueo del compartimiento del psoas y 15 horas en el bloqueo perivascular inguinal. CONCLUSIONES: El bloqueo del compartimiento del psoas y perivascular inguinal es una excelente técnica para la analgesia postoperatoria en intervenciones quirúrgicas ortopédicas reduciendo la necesidad de opioides. Ese

  6. Bloqueio extraconal para facectomia com implante de lente intra-ocular: influência do fentanil associado ao anestésico local na qualidade do bloqueio e na analgesia pós-operatória Bloqueo extraconal para facectomia con implantación de lente intra-ocular: influencia del fentanil asociado al anestésico local en la calidad del bloqueo y en la analgesia pos-operatoria Extraconal block for cataract extraction surgery with implantation of intraocular lens: contribution of fentanyl associated to local anesthetics for quality of block and postoperative analgesia

    Directory of Open Access Journals (Sweden)

    Daniel Espada Lahoz

    2003-09-01

    melhorou a qualidade do bloqueio quanto à motilidade do músculo reto medial e diminuiu a necessidade de analgésicos no pós-operatório.JUSTIFICATIVA Y OBJETIVOS: La anestesia locorregional para cirugías oftalmológicas ofrece ventajas, como: mínimas alteraciones fisiológicas, anestesia completa, bloqueo de los reflejos oculares, pequeña incidencia de náuseas y vómitos, menor tiempo de recuperación y analgesia pos-operatoria. La preocupación constante con la calidad del bloqueo, así como la abordaje de la analgesia pos-operatoria debe quedar bajo la responsabilidad del anestesiologista. El objetivo de este estudio fue evaluar si el fentanil contribuye en la calidad del bloqueo extraconal y en la analgesia pos-operatoria de facectomias con implantación de lente intra-ocular. MÉTODO: Se estudió la asociación del fentanil y bupivacaína a 0,75% en la calidad del bloqueo ocular y en la analgesia pos-operatoria en 164 pacientes sometidos a facectomia con implantación de lente intra-ocular (técnica extracapsular, de ambos sexos con homogeneidad de parámetros antropométricos, ojo operado, clasificación del estado físico (ASA e índice de riesgo cardíaco de Goldman. Los pacientes fueron distribuidos en dos grupos (82 pacientes en cada grupo por sorteo de forma aleatoria, con y sin fentanil. Se evaluó la calidad del bloqueo por: aparecimiento de dolor en el per-operatorio, manutención de movimentación de los párpados o del globo ocular, persistencia del reflejo de Bell, número de bloqueos realizados para la obtención de condiciones quirúrgicas y evaluación del bloqueo por el cirujano. La analgesia pos-operatoria fue evaluada por la necesidad de complementación analgésica por el paciente. RESULTADOS: Fentanil asociado a la solución anestésica en el bloqueo extraconal aumentó significativamente el bloqueo del músculo recto medial (con fentanil - 17,1%, sin fentanil - 32,9% y diminuyó el consumo de analgésicos en el período pos-operatorio (uso

  7. Evaluation of surface radiation dose to the thyroid gland and the gonads during routine full-mouth intraoral periapical and maxillary occlusal radiography

    Directory of Open Access Journals (Sweden)

    Soheyl Sheikh

    2010-01-01

    Full Text Available Aim: The quantitative aspects of radiation doses to critical organs can help the dental professionals to take the necessary radiation protective measures as deemed necessary and can help the general public to allay radiation exposure fear in dental radiography, if any. Our study determines the surface radiation dose to thyroid and gonads in full-mouth intraoral periapical (IOPA and maxillary occlusal radiography.Materials and Methods: A total number of 120 subjects participated in the study. The surface radiation dose was estimated to the thyroid gland and the gonads in full-mouth IOPA radiography using 10 IOPA (E speed films and in maxillary occlusal radiography. The measurements were calculated using a digital pocket dosimeter (PD-4507.Results: The average dose at the thyroid gland level during full-mouth intraoral and maxillary occlusal radiography was estimated to be 10.93 mRads (1.093 Χ 10 -2 mGy and 0.4 mRads (4.0 Χ 10 -2 mGy, respectively. The average surface radiation dose at the gonadal region during a full mouth intraoral and maxillary occlusal radiography was estimated to be 1.5 mRads (1.5 Χ 10 -2 mGy and 0.15 mRads (1.5 Χ 10 -3 mGy, respectively. Conclusion: Our results suggest that although the radiation exposure doses to critical organs namely thyroid and gonads is within the safe limits still precautionary measures for these organs are advocated.

  8. Duration of effect of the mouthwash CB12 for the treatment of intra-oral halitosis: a double-blind, randomised, controlled trial.

    Science.gov (United States)

    Seemann, Rainer; Filippi, Andreas; Michaelis, Sebastian; Lauterbach, Susanne; John, Hans-Dieter; Huismann, Jörg

    2016-01-01

    Halitosis occurs in approximately 30% of the adult population and has a negative social and psychological impact on affected individuals. Mouthwashes may be used to prevent unpleasant odour, with long-duration of effect being a desirable attribute. The aim of this study was to assess the long-term efficacy of CB12 (a mixture of 0.3% zinc acetate and 0.025% chlorhexidine) for the treatment of intra-oral halitosis. Thirty-four subjects with confirmed intra-oral halitosis were randomized into a double-blind, controlled, cross-over study to one of 2 groups; (i) CB12-water-water or (ii) water-CB12-CB12. Each group comprised 3 treatments, each given evening and morning (12 h apart) on consecutive study days, with a 5 d washout between treatments. Intra-oral halitosis was assessed objectively by measuring concentrations of hydrogen sulphide, methyl mercaptan, dimethyl sulphide and total volatile sulphur compound (VSC) concentrations and subjectively using organoleptic score (OLS). These were measured at baseline, 12 h after the evening rinse (i.e. 12 h overnight assessment) and 12 h after the daytime rinse (i.e. 12 h day time assessment). CB12 significantly reduced mean hydrogen sulphide, methyl mercaptan, dimethyl sulphide and VSC concentrations, with a duration of effect lasting 12 h, whether assessed overnight (all p  ⩽  0.0003 versus water) or during the day (all p  ⩽  0.0007 versus water). CB12's effect on OLS was also evident for 12 h overnight (p  =  0.0043). CB12 was well-tolerated. In conclusion, CB12 showed a clear and durable effect on intra-oral halitosis which lasted at least 12 h, both during the day and overnight, with consistent effect on both objective and subjective variables. PMID:27328808

  9. Exploring the useful exposure range limits of three intraoral image receptors for various tube potential, tube current and exposure time settings

    OpenAIRE

    Ioannis A. Tsalafoutas; Panagiotis Gritzalis; Evripides Stefanou; Evangelos Georgiou; Emmanouel Yakoumakis; Elli Katsoni

    2011-01-01

    Objectives: To determine the useful exposure range limits of three intraoral image receptors of different technology when exposed to different X-ray beam spectra, dose and dose rate levels. Study Design: A dental X-ray unit offering a wide range of tube potential, tube current and exposure time settings was used to expose a dental quality control phantom. The receptors that were used to capture the radiographic images of the phantom were: the Kodak Insight, the Kodak RVG-6000 and the Duerr Vi...

  10. Correlación automatizada de parámetros geométricos mediante contornos de bloqueo en engranajes cilíndricos con contacto exterior//Automatic correlation of geometric parameters by means of blocking contours in spur and helical external gear

    Directory of Open Access Journals (Sweden)

    Robert Hernández-Ortega

    2012-12-01

    Full Text Available Este trabajo tuvo como objetivo obtener un procedimiento, que al implementarse en un software para el diseño de transmisiones por engranajes cilíndricos con contacto exterior, correlacione automáticamente los parámetros geométricos mediante los contornos de bloqueo y así facilitar el trabajo del diseñador deengranajes. Para ello, se transformaron las expresiones matemáticas que definen las limitaciones geométricas para que puedan ser utilizadas en un programa que construya el contorno de bloqueo sin la intervención del diseñador. Se estableció además la secuencia en que estas deben ser calculadas. El procedimiento obtenido se implementó en un programa de computación obteniéndose una velocidad deejecución de 1 segundo aproximadamente. De esta forma se logró la correlación automática de los parámetros geométricos y un contorno de bloqueo que muestra el conjunto de valores de los coeficientes de corrección de las ruedas que pueden ser utilizados, construidos sin interacción con el diseñador.Palabras claves: contorno de bloqueo, engranajes, parámetros geométricos._______________________________________________________________________________AbstractThe aim of this work was to obtain a procedure, that when being implemented in the design software of spur and helical external gears, correlate the geometric parameters automatically by means of the blocking contours making easier the designer's work. The mathematical expressions that define the geometriclimitations were transformed so that they can be used in a program that it builds the blocking contour without the designer's intervention. Besides that it was settled down the sequence they should be calculated. The procedure was implemented in a calculation program obtaining an execution speed about 1 second. This way it was achieved the automatic correlation of the geometric parameters and a blockingcontour construction without the designer's intervention that it shows the

  11. Parche de lidocaína al 5% para el tratamiento del SDRC de extremidad superior por bloqueo transcutáneo del plexo braquial: Caso Clínico

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    M. A. Vidal

    2007-06-01

    Full Text Available El síndrome de dolor regional complejo (SDRC se manifiestan con una clínica variada que se caracteriza por dolor, impotencia funcional, trastornos vaso-sudomotores y alteraciones tróficas. Está causado por una lesión primaria o una disfunción del Sistema Nervioso Periférico, estableciéndose dos grupos: SDRC-I que sustituye al término DSR y el SDRCII en lugar del término causalgia. Caso clínico: Varón de 37 años de edad, que tras ser sometido a una artroscopia de hombro comenzó a presentar dolor en el hombro y limitación funcional importante, así como ciertos cambios vasomotores de la misma extremidad, por lo que se diagnosticó de SDRC. El paciente siguió varias pautas de tratamiento analgésico por vía oral, fue sometido a numerosas infiltraciones intraarticulares, se realizaron bloqueos del ganglio estrellado e inició tratamiento rehabilitador. Durante estos meses la evolución clínica del paciente fue tórpida, reapareciendo el dolor en todas las ocasiones y sin presentar mejoría de la movilidad. Se decidió iniciar tratamiento con parches de lidocaína al 5%, con lo que se consiguió controlar el dolor del paciente y finalizó la rehabilitación con recuperación completa. El parche de lidocaína al 5% es un analgésico tópico desarrollado para el tratamiento del dolor neuropático de origen periférico. Está aprobado en EEUU para el tratamiento de la neuralgia postherpética. Sin embargo, se está probando su utilización en otras formas de dolor neuropático, como la neuropatía diabética, el dolor crónico de espalda y el dolor miofascial. El SDRC está asociado con una actividad anormal del sistema nervioso simpático, por lo que el bloqueo simpático mediante anestésicos locales es ampliamente utilizado. En el caso concreto de los parches de lidocaína al 5% se ha publicado un caso de tratamiento de forma efectiva. Este caso es similar al que nosotros describimos, que también fue refractario al tratamiento

  12. Remifentanilo vs. bloqueo central epidural para control del dolor postoperatorio en cirugía vascular de urgencias Remifentanyl versus epidural central blockade for the management of postoperative pain in emergency vascular surgery

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    A. Quirante

    2004-12-01

    Full Text Available El correcto tratamiento del dolor postoperatorio constituye una prioridad dentro de los objetivos del anestesiólogo. En pacientes con patología vascular severa quirúrgica, el tratamiento analgésico efectivo se suele realizar mediante bloqueo continuo epidural. Sin embargo, la administración de analgésicos, tanto opiáceos como no opiáceos, por vía intravenosa, es una alternativa a la vía epidural cuando esta es desestimada. Caso clínico: Presentamos el caso de un paciente varón de 63 años portador de un bypass fémoro-poplíteo a primera porción en miembro inferior izquierdo, el cual es intervenido quirúrgicamente y con carácter urgente tras el diagnóstico de falso aneurisma séptico de arteria iliaca izquierda con rotura de anastomosis fémoro-poplítea. Se optó por una anestesia general basada en la analgesia con remifentanilo frente a bloqueo central epidural dado el carácter urgente de la cirugía y la ingesta habitual de antiagregantes plaquetarios. Se planificó como estrategia analgésica postoperatoria la administración de remifentanilo a dosis sedoanalgésicas (Introduction: The appropriate management of postoperative pain is a priority among the objectives of the anesthesiologist. In patients with severe surgical vascular pathology, an effective analgesic treatment is usually provided with epidural continuous blockade. However, the intravenous administration of analgesics, either opiates or non opiates, is an alternative to the epidural route when this has to be dismissed. Clinical case: We present the case of a 63-years old male patient carrying a femoro-popliteus bypass in the first portion of the left lower limb that underwent emergency surgery after being diagnosed of a false septic aneurysm in the left iliac artery with breakage of the femoro-popliteus anastomosis. General anesthesia based on remifentanyl was decided instead of epidural central blockade due to the urgent nature of the surgery and the regular

  13. Generación de inclusiones no metálicas y su efecto sobre el bloqueo de boquillas de colada continua en aceros ultra bajo carbono estabilizados con titanio

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    Vega-Becerra, O.

    2005-12-01

    Full Text Available This work presents a thermodynamic and experimental analysis of the phases that precipitate in the non metallic inclusions depending on the contents of aluminium (Al, titanium (Ti and oxygen (O in the steel, and their influence on the nozzle clogging. For the thermodynamic analysis, the program FACT WIN (Facility For The Analysis of Chemical Thermodynamics subroutine Equilib. was used. The experimental tests were carried out in an TAMMANN furnace, in an argon atmosphere. The control of the content of dissolved oxygen was carried out by means of sensors of solid electrolyte bases zirconia. The characterization of the inclusions was carried out with SEM, EDS and by means of the technique of fractional reduction with carbon. A good agreement was observed between the thermodynamic predictions and the experimental results.

    En este trabajo se presenta un análisis termodinámico y experimental de las fases que precipitan en inclusiones no metálicas en función de los contenidos de aluminio (Al, titanio (Ti y oxígeno (O en el acero y su influencia sobre el bloqueo de boquillas de colada continua. Para el análisis termodinámico se utilizó el programa FACT-WIN (Facility For The Analysis of Chemical Thermodynamics subrutina Equilib. Las pruebas experimentales se realizaron en un horno TAMMANN, en atmósfera de argón. El control del contenido de oxígeno disuelto se llevó a cabo mediante sensores de electrólito sólido base zirconia. La caracterización de las inclusiones se realizó por SEM, EDS y mediante la técnica de reducción fraccionada con carbono. Se observó una buena concordancia entre las predicciones termodinámicas y los resultados experimentales.

  14. Analgesia pós-operatória em correção cirúrgica de pé torto congênito: comparação entre bloqueio nervoso periférico e bloqueio peridural caudal Analgesia postoperatoria en corrección quirúrgica de pie jorobado congénito: comparación entre bloqueo nervioso periférico y bloqueo epidural caudal Postoperative analgesia for the surgical correction of congenital clubfoot: comparison between peripheral nerve block and caudal epidural block

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    Monica Rossi Rodrigues

    2009-12-01

    con dolor postoperatorio intenso. La técnica más utilizada en niños es la epidural caudal asociada a la anestesia general. Posee la limitante de una corta duración de la analgesia postoperatoria. Los bloqueos de nervios periféricos han sido indicados como procedimientos con una baja incidencia de complicaciones y un tiempo prolongado de analgesia. El objetivo del estudio actual, fue comparar el tiempo de analgesia de los bloqueos nerviosos periféricos y del bloqueo caudal y el consumo de morfina, en las primeras 24 horas después de la corrección de PJC en niños. MÉTODO: Estudio randómico doble ciego, en niños sometidos a la intervención quirúrgica para liberación posteromedial de PJC, ubicadas en cuatro grupos conforme a la técnica anestésica: caudal (ACa; bloqueos isquiático y femoral (IF; bloqueos isquiático y safeno (IS; bloqueo isquiático y anestesia local (IL, asociados a la anestesia general. En las primeras 24 horas, los pacientes recibieron dipirona y paracetamol vía oral y fueron evaluados por un anestesiólogo que no conocía la técnica usada. Conforme a las puntuaciones de la escala CHIPPS (Children's and infants postoperative pain scale, se administraba morfina vía oral (0,19 mg.kg-1 por día. RESULTADOS: Fueron estudiados 118 niños distribuidos en los grupos ACa (30, IF (32, IS (28 IL (28. El tiempo promedio entre el bloqueo y la primera dosis de morfina fue de 6,16 horas en el grupo ACa, 7,05 horas en el IF, 7,58 horas en el IS y 8,18 horas en el IL. El consumo de morfina fue de 0,3 mg.kg-1 por día en los cuatro grupos. No hubo diferencia significativa entre los grupos. CONCLUSIONES: Los bloqueos nerviosos periféricos no promovieron un tiempo más elevado de analgesia, ni tampoco una reducción en el consumo de morfina en las primeras 24 horas, en niños sometidos a la corrección de PJC cuando se les comparó con el bloqueo epidural caudal.BACKGROUND AND OBJECTIVES: Correction of congenital clubfoot (CCF is associated with

  15. Effect of cooled composite inserts in the sealing ability of resin composite restorations placed at intraoral temperatures: an in vitro study.

    Science.gov (United States)

    de la Torre-Moreno, Francisco José; Rosales-Leal, Juan Ignacio; Bravo, Manuel

    2003-01-01

    Polymerization shrinkage causes microleakage of resin composite restorations. New materials and operative techniques should be developed in order to reduce polymerization shrinkage. This research studied the effects of cooled composite inserts and room-temperature composite inserts in the sealing ability of resin composite restorations placed at intraoral temperatures. Forty-eight extracted human molars (providing a total of 155 sections) were kept at intraoral temperatures, and Class V cavities were restored with an ormocer-based resin composite (Admira, Voco). Three restorative techniques were used: conventional bulk insertion (Group I or control group) (n = 53 sections), room-temperature resin composite inserts (Group II) (n = 52) and cooled resin composite inserts (Group III) (n = 50). Microleakage and penetrating microleakage were studied under the microscope. Cooled composite inserts reduce microleakage at the gingival margins with respect to Groups I (p = 0.002) and II (p = 0.014). When small-size cooled composite inserts were used, the sealing ability at the gingival margins of Class V composite restorations was improved with respect to the bulk insertion technique and the room-temperature composite inserts technique.

  16. Comparison between intraoral indirect and conventional film-based imaging for the detection of dental root fractures: an ex vivo study.

    Science.gov (United States)

    Shintaku, Werner H; Venturin, Jaqueline S; Noujeim, Marcel; Dove, Stephen B

    2013-12-01

    Digital intraoral radiographic systems have been rapidly replacing conventional dental X-ray films for diagnosis of dental diseases. Current scientific literature supports the use of these digital systems for the detection of dental caries, periodontal bone loss, and periapical pathologies. However, relatively few studies have been published addressing the detection of dental root fractures. The purpose of this study was to compare the intraoral F-speed film (Insight) with two photostimulable phosphor (PSP) indirect digital systems (ScanX and Digora Optime) for the detection of simulated dental root fractures. Ten raters evaluated images acquired from 10 dry human cadaver mandibles under optimal viewing conditions. These data were analyzed by a 5-point receiver operating characteristic curve analysis for statistical differences. Sensitivity and specificity of these systems were also assessed. Since statistically significant difference between the systems was not observed, the results of this study agreeably support indirect digital PSP plates as an alternative to the evaluated conventional film for the detection of dental root fractures.

  17. Comparison between intraoral indirect and conventional film-based imaging for the detection of dental root fractures: an ex vivo study.

    Science.gov (United States)

    Shintaku, Werner H; Venturin, Jaqueline S; Noujeim, Marcel; Dove, Stephen B

    2013-12-01

    Digital intraoral radiographic systems have been rapidly replacing conventional dental X-ray films for diagnosis of dental diseases. Current scientific literature supports the use of these digital systems for the detection of dental caries, periodontal bone loss, and periapical pathologies. However, relatively few studies have been published addressing the detection of dental root fractures. The purpose of this study was to compare the intraoral F-speed film (Insight) with two photostimulable phosphor (PSP) indirect digital systems (ScanX and Digora Optime) for the detection of simulated dental root fractures. Ten raters evaluated images acquired from 10 dry human cadaver mandibles under optimal viewing conditions. These data were analyzed by a 5-point receiver operating characteristic curve analysis for statistical differences. Sensitivity and specificity of these systems were also assessed. Since statistically significant difference between the systems was not observed, the results of this study agreeably support indirect digital PSP plates as an alternative to the evaluated conventional film for the detection of dental root fractures. PMID:23566073

  18. Effects of early intraoral acesulfame-K stimulation to mice on the adult's sweet preference and the expression of α-gustducin in fungiform papilla.

    Science.gov (United States)

    Chen, Meng-Ling; Liu, Si-Si; Zhang, Gen-Hua; Quan, Ying; Zhan, Yue-Hua; Gu, Tian-Yuan; Qin, Yu-Mei; Deng, Shao-Ping

    2013-06-01

    Exposure to artificial sweetener acesulfame-K (AK) at early development stages may influence the adult sweet preference and the periphery gustatory system. We observed that the intraoral AK stimulation to mice from postnatal day 4 (P4) to weaning decreased the preference thresholds for AK and sucrose solutions in adulthood, with the preference pattern unchanged. The preference scores were increased in the exposure group significantly when compared with the control group at a range of concentrations for AK or sucrose solution. Meanwhile, more α-Gustducin-labeled fungiform taste buds and cells in a single taste bud were induced from week 7 by the early intraoral AK stimulation. However, the growth in the number of α-Gustducin-positive taste bud or positive cell number per taste bud occurred only in the anterior region, the rostral 1-mm part, but not in the intermediate region, the caudal 4-mm part, of the anterior two-third of the tongue containing fungiform papillae. This work extends our previous observations and provides new information about the developmental and regional expression pattern of α-Gustducin in mouse fungiform taste bud under early AK-stimulated conditions. PMID:23537561

  19. Bloqueio do plexo braquial por via supraclavicular: estudo clínico comparativo entre bupivacaína e levobupivacaína Bloqueo del plexo braquial por vía supraclavicular: estudio clínico comparativo entre bupivacaína y levobupivacaína Supraclavicular brachial plexus block: a comparative clinical study between bupivacaine and levobupivacaine

    Directory of Open Access Journals (Sweden)

    José Ricardo Pinotti Pedro

    2009-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo braquial é técnica anestésica utilizada para procedimentos em membros superiores. O plexo braquial é território potencial para absorção de anestésicos locais. Estudos dos estereoisômeros da bupivacaína vêm demonstrando menor potencial de toxicidade da fração levógira (levobupivacaína sobre o sistema cardiovascular. Porém, é discutida a eficácia anestésica (bloqueio sensitivo e motor da levobupivacaína em anestesia do neuroeixo. Este estudo visa demonstrar a eficácia anestésica da levobupivacaína, comparandoa com a bupivacaína racêmica em bloqueio de plexo braquial, via perivascular subclávia. MÉTODO: Cinquenta pacientes adultos de ambos os sexos, ASA I e II, foram submetidos à anestesia de plexo braquial via perivascular subclávia para procedimentos ortopédicos de membros superiores, com auxílio de neuroestimulador. Foram divididos de modo aleatório em dois grupos: G BUPI - bupivacaína racêmica e G LEVO - levobupivacaína, num volume de 30 mL a 0,5%. O bloqueio sensitivo foi avaliado pelo método de "picada de agulha" nos metâmeros de C5 a C8; e o bloqueio motor, nos intervalos em minutos 1, 2, 5, 10, 15, 20, 25, 30 ou até instalação do bloqueio em movimentos dos dedos, mão, antebraço e braço. RESULTADOS: Não houve diferença estatística entre os dois grupos quanto à latência, incidência de falhas e grau do bloqueio motor, bem como incidência de falhas do bloqueio sensitivo, mas verificou-se diferença estatística da latência do bloqueio sensitivo em todos os metâmeros analisados. Não houve efeitos adversos inerentes à aplicação do anestésico local. CONCLUSÕES: A levobupivacaína demonstrou eficácia anestésica em bloqueio de plexo braquial, equiparável à solução racêmica usualmente empregada.JUSTIFICATIVA Y OBJETIVOS: El bloqueo de plexo braquial es la técnica anestésica utilizada para procedimientos en miembros superiores. El plexo

  20. Bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5% Bloqueo del plexo braquial por la vía posterior con el uso de neuroestimulador y ropivacaína a 0,5% Posterior brachial plexus block with nerve stimulator and 0.5% ropivacaine

    Directory of Open Access Journals (Sweden)

    Lúcia Beato

    2005-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Existem várias maneiras de abordar o plexo braquial dependendo da experiência do anestesiologista e da região a ser operada. O bloqueio do plexo braquial pela via posterior pode representar uma alternativa para cirurgias de ombro, clavícula e úmero proximal. O objetivo deste estudo foi mostrar os resultados observados em pacientes submetidos a bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5%. MÉTODO: Vinte e dois pacientes com idade entre 17 e 76 anos, estado físico ASA I e II, submetidos a cirurgias ortopédicas envolvendo o ombro, clavícula e úmero proximal foram anestesiados com bloqueio de plexo braquial pela via posterior utilizando neuroestimulador a partir de 1 mA. Obtida a contração desejada, a corrente foi diminuída para 0,5 mA e, permanecendo a resposta contrátil, foram injetados 40 mL de ropivacaína a 0,5%. Foram avaliados os seguintes parâmetros: latência, analgesia, duração da cirurgia, duração da analgesia e do bloqueio motor, complicações e efeitos colaterais. RESULTADOS: O bloqueio foi efetivo em 20 dos 22 pacientes; a latência média foi de 15,52 min; a duração média da cirurgia foi de 1,61 hora. A média de duração da analgesia foi de 15,85 horas e do bloqueio motor 11,16 horas. Não foram observados sinais e sintomas clínicos de toxicidade do anestésico local e nenhum paciente apresentou efeitos adversos do bloqueio. CONCLUSÕES: Nas condições deste estudo o bloqueio de plexo braquial pela via posterior com o uso do neuroestimulador e ropivacaína a 0,5% demonstrou ser uma técnica efetiva, confortável para o paciente e de fácil realização.JUSTIFICATIVA Y OBJETIVOS: Existen varios modos de abordar el plexo braquial dependiendo de la experiencia del anestesiologista y de la región que será operada. El bloqueo del plexo braquial por la vía posterior puede representar una alternativa para cirugías de hombro, clav

  1. Bloqueio do nervo maxilar para redução de fraturas do osso zigomático e assoalho da órbita Bloqueo del nervio maxilar para reducción de fracturas del hueso zigomático y suelo de la órbita Maxillary nerve block for zygoma and orbital floor fractures reduction

    Directory of Open Access Journals (Sweden)

    Karl Otto Geier

    2003-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Poucos relatos existem sobre redução de fraturas da órbita zigomática e do arco zigomático sob anestesia regional. O objetivo deste estudo é verificar a qualidade do bloqueio do nervo maxilar por via extraoral, para redução de fraturas do osso zigomático e do assoalho da órbita. MÉTODO: Quinze pacientes foram submetidos à bloqueio do nervo maxilar pela técnica de Moore (abordagem infrazigomática para redução de fraturas isoladas do arco zigomático (oito pacientes e associadas ao assoalho da órbita (sete pacientes. Nenhum paciente recebeu medicação pré-anestésica. Após sedação e anestesia local com 2 ml de lidocaína a 1,5% com adrenalina a 1:300.000, o nervo maxilar foi abordado com 8 ml da mesma solução anestésica através de uma agulha 22G, 10 cm de comprimento de ponta romba. Foram avaliados: o tempo de bloqueio, a latência, o tempo de analgesia, a incidência de falhas, a necessidade de anestesia geral e as complicações. RESULTADOS: Os primeiros três bloqueios foram difíceis, resultando em dois bloqueios parciais e uma falha. Os restantes foram efetivos e os pacientes não referiram nenhum desconforto ou dor durante o bloqueio e a cirurgia. O tempo para a realização do bloqueio variou de 5 a 20 minutos, enquanto a latência anestésica ficou entre 3 e 10 minutos. Foram registradas 7 ocorrências de punção vascular, porém sem relatos de formação de hematomas. CONCLUSÕES: Redução de fraturas zigomáticas são factíveis sob bloqueio do nervo maxilar, quando realizadas na fossa ptérigo palatina, permitindo anestesia de seus dois ramos distais, nervo zigomático-temporal e nervo zigomático-frontal.JUSTIFICATIVA Y OBJETIVOS: Pocos relatos existen sobre reducción de fracturas de la órbita zigomática y del arco zigomático bajo anestesia regional. El objetivo de este estudio es confirmar la calidad del bloqueo del nervio maxilar por vía extraoral, para reducción de

  2. Clinical evaluation of the intraoral fluoride releasing system in radiation-induced xerostomic subjects. Part 2: Phase I study.

    Science.gov (United States)

    Chambers, Mark S; Mellberg, James R; Keene, Harris J; Bouwsma, Otis J; Garden, Adam S; Sipos, Tibor; Fleming, Terence J

    2006-10-01

    Radiation-induced xerostomia can result in the rapid onset and progression of dental caries in head and neck cancer patients. Topically applied fluorides have been successfully used to inhibit the formation of dental caries in this population. However, because intensive daily self-application is required, compliance is an issue. The intraoral fluoride-releasing system (IFRS) containing a sodium fluoride core is a newly developed, sustained-release, passive drug delivery system that does not require patient involvement except for periodic replacement, thus reducing the effect of patient compliance on its effectiveness in dental caries prevention. Twenty-two head and neck cancer patients from U. T. M. D. Anderson Cancer Center, with radiation-induced xerostomia, were entered into a pilot study to contrast the daily home use of a 0.4% stannous fluoride-gel-containing tray (control group) to IFRS (study group) with respect to tolerability and adherence, and to obtain information on relative caries preventive efficacy. Participants were stratified on the basis of radiation exposure and randomly assigned to treatment with either IFRS or stannous fluoride gel. Patients in both groups were fitted with two IFRS retainers and also were instructed to use a 1100-ppm fluoride conventional sodium fluoride dentifrice twice daily. The study was conducted as a single-blinded, parallel-cell trial. Pre-existing carious lesions were restored prior to the beginning of the study. The efficacy variable was determined by the mean number of new or recurrent decayed surfaces. Patients were examined for caries 4, 8, 12, 24, 36, and 48 weeks after initiation of treatment. Reports of adverse reactions were based on information volunteered by patients and that were elicited during interviews. At baseline, the resting and stimulated salivary flow rates (g/5min) were significantly greater in the control group than in the study group (pIFRS groups during the study period. The rate of new or

  3. The Effects on Absorbed Dose Distribution in Intraoral X-ray Imaging When Using Tube Voltages of 60 and 70 kV for Bitewing Imaging

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    Kristina Hellén-Halme

    2013-10-01

    Full Text Available Objectives: Efforts are made in radiographic examinations to obtain the best image quality with the lowest possible absorbed dose to the patient. In dental radiography, the absorbed dose to patients is very low, but exposures are relatively frequent. It has been suggested that frequent low-dose exposures can pose a risk for development of future cancer. It has previously been reported that there was no significant difference in the diagnostic accuracy of approximal carious lesions in radiographs obtained using tube voltages of 60 and 70 kV. The aim of this study was, therefore, to evaluate the patient dose resulting from exposures at these tube voltages to obtain intraoral bitewing radiographs.Material and Methods: The absorbed dose distributions resulting from two bitewing exposures were measured at tube voltages of 60 and 70 kV using Gafchromic® film and an anatomical head phantom. The dose was measured in the occlusal plane, and ± 50 mm cranially and caudally to evaluate the amount of scattered radiation. The same entrance dose to the phantom was used. The absorbed dose was expressed as the ratio of the maximal doses, the mean doses and the integral doses at tube voltages of 70 and 60 kV.Results: The patient receives approximately 40 - 50% higher (mean and integral absorbed dose when a tube voltage of 70 kV is used.Conclusions: The results of this study clearly indicate that 60 kV should be used for dental intraoral radiographic examinations for approximal caries detection.

  4. Syringe micro vibrator (SMV a new device being introduced in dentistry to alleviate pain and anxiety of intraoral injections, and a comparative study with a similar device

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    Shahidi Bonjar Amir Hashem

    2011-01-01

    Full Text Available Abstract Background Neurologically, it is proven that stimulation of larger diameter fibers - e.g. using appropriate coldness, warmth, rubbing, pressure or vibration- can close the neural "gate" so that the central perception of itch and pain is reduced. This fact is based upon "Gate-control" theory of Melzack and Wall. Presentation of the hypothesis Syringe Micro Vibrator is a new design being introduced for the first time in the field of Dentistry. This device is a promising breakthrough in pain and anxiety management and may deliver solution for clinicians plagued with patient pain phobia. It has an off-set rotating micro vibration creator with ultra high frequency and ultra low altitude that can be easily placed on any standard dental syringe and some disposable syringes. This device was registered as an invention in dentistry and received Iran National Patent number of 63765. Testing the hypothesis By creating micro vibration, this device would be effective in reducing the pain and anxiety confronted with most types of intraoral injections as palatal, mandibular block, intraligamental and local infiltration. From the aspect of the patient pain management, this device contributes both physiologically (based on Gate Control Theory of pain and psychologically (based on the device function as will be explained by dentist to the patient as a modern pain reducing technology. From the aspect of clinician, SMV motor provides vibrations with ultra high frequency to alleviate pain, but since it has ultra low vibration altitude, it has no adverse effect on the clinician dexterity and accuracy during injection and it does not interfere with pin point localization of injection site. Implications of the hypothesis Upon mounting on a conventional dental anesthesia injection syringe, SMV is switched on and the clinician then uses normal injection technique to administer the anesthetic. This device is not only a useful accessory device for ordinary patients

  5. Analgesia postoperatoria en la cirugía del pie y tobillo mediante bloqueo ciático poplíteo lateral con ropivacaína Postoperative analgesia in foot and ankle surgery through lateral popliteal sciatic blockade with ropivacaine

    Directory of Open Access Journals (Sweden)

    G. Valladares

    2004-03-01

    Full Text Available Introducción: El bloqueo del nervio ciático en la fosa poplítea proporciona una adecuada y prolongada analgesia postoperatoria en la cirugía del pie y tobillo. La principal ventaja del abordaje lateral es que no es preciso modificar la posición de decúbito supino del paciente para la realización de la técnica, mientras que en el abordaje posterior el paciente ha de colocarse en decúbito prono, lo cual puede resultar difícil e incluso desaconsejable en determinadas situaciones: estados avanzados de gestación, inestabilidad hemodinámica y ventilación mecánica. Material y método: Se incluyeron pacientes valorados con riesgo anestésico ASA I-II, programados para cirugía ortopédica-traumatológica del pie o tobillo. Se realizó un bloqueo del nervio ciático en la fosa poplítea mediante abordaje lateral según la técnica descrita por Vloka J.D y Hadzic A, empleándose una aguja para neuroestimulación, biselada de calibre 22G x 80 mm. Se consideró como respuesta motora adecuada cualquier movimiento del pie o dedos a intensidad inferior a 0,4 mA y superior a 0,1 mA. La observación de una respuesta motora a intensidad de estimulación de 0,1 mA se consideró como localización intraneural de la aguja. Se inyectaron 40 mL de ropivacaína 0,5%. Las principales variables que se registraron a las 8, 16 y 24 horas tras la realización del bloqueo fueron el dolor en reposo y en movimiento según la escala visual analógica (EVA de 0-10 y el grado de satisfacción. Resultados: Se incluyeron 21 pacientes ASA I-II. El dolor medio en reposo fue valorado como de intensidad 1 en las primeras 8 horas y de intensidad 3 a las 16 h y 24 h tras la realización del bloqueo. El dolor medio con el movimiento articular fue valorado como de intensidad 2 a las 8 h y de intensidad 4 a las 16 h y 24 h tras el bloqueo. El grado de satisfacción medio referido por los pacientes fue de 9. Discusión: El abordaje lateral, como en la serie que presentamos, nos

  6. Bloqueio inadvertido do neuroeixo durante artroplastia vertebral: relato de caso Bloqueo no percibido del neuroeje durante la artroplastia vertebral: relato de caso Accidental spinal block during vertebral artroplasty: case report

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    Michelle Nacur Lorentz

    2006-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A cirurgia de artroplastia vertebral com uso do cimento ósseo tem suas particularidades e complicações. Na maioria das vezes o procedimento é realizado sob anestesia local com sedação, mas algumas vezes é realizado bloqueio subaracnóideo ou peridural com morfina com o intuito de fornecer analgesia pós-operatória. O objetivo deste relato foi discutir as possíveis complicações em cirurgias de artroplastia vertebral. RELATO DO CASO: Paciente do sexo masculino, 76 anos, apresentando fratura patológica em T12, foi admitido para cirurgia de artroplastia vertebral e biopsia óssea. Foi realizada sedação com midazolam e fentanil, o paciente foi colocado em decúbito ventral e o cirurgião infiltrou anestésico local desde a pele até o corpo vertebral de T12 a seguir biopsiou a vértebra e injetou 6 mL de cimento ósseo em T12. Ao final do procedimento o paciente apresentava paralisia dos membros inferiores. CONCLUSÕES: A intervenção cirúrgica na coluna vertebral não é procedimento isento de complicações. Quando se associa bloqueio espinal pode-se retardar o diagnóstico de complicação cirúrgica; além disto corre-se o risco de se imputar à anestesia um problema proveniente do procedimento cirúrgico.JUSTIFICATIVA Y OBJETIVOS: A cirugía de artroplastia vertebral con uso del cimiento óseo tiene sus particularidades y complicaciones. En la mayoría de las veces el procedimiento se realiza bajo anestesia local con sedación, pero en algunos casos se realiza el bloqueo subaracnoideo o peridural con morfina con el interés de suministrar analgesia postoperatoria. El objetivo de este relato fue el de discutir las posibles complicaciones en cirugías de artroplastia vertebral. RELATO DEL CASO: Paciente del sexo masculino, 76 años, presentando fractura patológica en T12, fue admitido para cirugía de artroplastia vertebral y biopsia ósea. Se realizó sedación con midazolam y fentanil, el paciente fue

  7. Síndrome doloroso regional complejo tipo 1: Tratamiento mediante bloqueos simpáticos y más... Complex regional pain syndrome type I: Management with sympathetic blockade and other therapies…

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    B. Garrido

    2005-10-01

    Full Text Available Introducción: El síndrome doloroso regional complejo tipo 1 (SDRC-I cursa con una fase aguda de inflamación neurogénica regional, que conduce a una fase crónica de desórdenes neuropáticos. La participación del sistema nervioso simpático en su génesis y mantenimiento es significativa, pero no exclusiva. De ahí la importancia de un tratamiento precoz y multifactorial, dirigido a los mecanismos fisiopatológicos. Objetivos: Estudiar el uso de los bloqueos simpáticos, asociados a otros procederes y fármacos en su tratamiento. Material y métodos: Se estudiaron 68 pacientes portadores de SDRC-I que acudieron a la Clínica del Dolor, a los que se realizó bloqueo de la cadena simpática ganglionar cervical y lumbar según la localización de la entidad. Todos los pacientes asociaron el hidromasaje en el hogar. Se administraron fármacos coadyuvantes para el control del dolor neuropático, paroxístico y persistente quemante. En los casos con trastornos de la consolidación ósea, se aplicó laserterapia local y TENS en los que presentaban mayor limitación funcional; así como técnicas de fisiatría. Se aplicó la escala análoga visual (EAV para evaluar la intensidad de la analgesia y se realizó examen físico para la valoración de los trastornos autonómicos. La función articular se consideró mediante la escala de Enneking y cols. para pacientes amputados, modificada por nosotros. Resultados: El dolor se controló en 33 pacientes y 28 descendieron su EAV a niveles álgicos tolerables, para un 89,70% de efectividad terapéutica. La función articular se recuperó en 30 pacientes y 20 quedaron con limitación leve, estos dos grupos con mejor respuesta correspondieron al 73,52% del total de los pacientes, 11 quedaron con limitación moderada y sólo 7, el 10,29% de ellos con limitación severa. Los trastornos vasomotores remitieron en la totalidad de los que presentaron respuesta favorable. Conclusiones: La intensidad de la analgesia

  8. Técnica quirúrgica para abordaje intraoral de quiste dermoide cervical de gran tamaño: a propósito de un caso clínico Surgical technique for intraoral approach to a large cervical dermoid cyst: case report

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    Víctor Gómez-Carrillo

    2011-09-01

    Full Text Available Lesiones benignas de extensión submilohioidea pueden abordarse por vía intraoral, eludiendo una cicatriz cutánea y garantizando la preservación de las ramas del nervio facial. Se aborda el suelo de boca, consiguiendo una buena exposición del campo quirúrgico extirpando la glándula sublingual. Se diseca el conducto submaxilar para evitar su morbilidad. Se diseca la lesión en todos sus polos. Una vez que se encuentra completamente despegada, se vacía parcialmente de contenido para que pueda caber por la incisión que se ha realizado.Submilohyoid benign lesions can be approached intraorally, thus avoiding skin scars and ensuring the preservation of facial nerve branches. The floor of the mouth is opened and better exposure of the surgical field is achieved by removing the sublingual gland. The submandibular duct is identified and probed to prevent damage. The lesion is totally dissected and its contents removed so it could fit through the incision made.

  9. Manejo de las radiaciones ionizantes en instalaciones dentales españolas: intraorales y panorámicos Use of ionizing radiations in spanish dental equipments: intraoral and panoramic

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    S Jodar

    2005-02-01

    Full Text Available El objetivo de este estudio fue determinar las características de la radiología dental en la Comunidad Autónoma de Murcia, con el propósito de poder evaluar el grado de cumplimiento de las recomendaciones Oficiales de la Unión Europea. Para ello se estudian 1822 informes oficiales de control de calidad en radiodiagnóstico dental intraoral y 157 pertenecientes a exámenes panorámicos durante cinco años consecutivos. Los resultados obtenidos ponen de manifiesto que un tercio de los equipos dentales intraorales revisados presentan averías en su funcionamiento y un 6´24% en el caso de los panorámicos. Solamente un 63.54% de las instalaciones intraorales cumplirían con las recomendaciones oficiales al emplear equipos modernos que funcionan a 70 kVp, 8 mA, 20 cm. de distancia foco piel y 1.5 mm de Al. Se ha producido un descenso del 11.53% en las dosis medias administradas a lo largo del estudio, aumentando la empleada con aparatos panorámicos. La entrada en vigor de esta nueva legislación ha supuesto un descenso en las dosis medias de radiación administradas a los pacientes tras los cinco años de evolución analizados aunque se sigue incumpliendo las recomendaciones oficiales europeas sobre Protección Radiológica.The aim of the study was to determinate Dental Radiology behaviour in Murcia Community to control the European Union Recommendations. 1822 official reports on quality assurance in intraoral radiology and 155 official reports on panoramic radiology have been studied. The results indicate that one and a half of intraoral radiographic equipments studied and 6´24% in panoramic had alterations. Only the 63´54% of the surgeries achived the European Community Recommendations of intraoral radiology working to 70 kVp, 8 mA and 1.5 mm of Al. There have been a decrease of the intraoral radiation dose exposured. The recent legislation have meant a decrease in the intraoral radiation dose administrated despite of the unachivement of

  10. Bloqueio atrioventricular de 2° grau do tipo I Mobitz após aplicação de penicilina benzatina: relato de caso Bloqueo atrioventricular de 2º grado tipo Mobitz I después de la aplicación de penicilina benzatina: relato de caso Second degree atrioventricular block Mobitz type I after administration of benzathine penicillin: case report

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    Lúcia de Sousa Belém

    2009-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio atrioventricular de 2° grau do tipo I de Mobitz é observado como alteração transitória na presença de infarto de parede inferior ou de intoxicação medicamentosa. O objetivo desse relato foi apresentar caso de bloqueio atrioventricular de 2° grau tipo I de Mobitz após aplicação de penicilina benzatina. RELATO DO CASO: Paciente apresentou síncope e sudorese após aplicação de penicilina benzatina. Ao exame físico apresentava-se sudoreico, bradicárdico e com ritmo irregular. Foi realizado eletrocardiograma (ECG que mostrava bloqueio atrioventricular de 2° grau do tipo I de Mobitz. Administrou-se atropina 0,5 mg por via venosa. Após uma hora foi repetido o ECG que apresentava traçado normal. Paciente permaneceu seis horas assintomático e então recebeu alta. CONCLUSÕES: O bloqueio atrioventricular de 2° grau do tipo I de Mobitz surgiu após aplicação de penicilina benzatina.JUSTIFICATIVA Y OBJETIVOS: El bloqueo atrioventricular de 2° grado del tipo I de Mobitz es observado como una alteración transitoria en la presencia de infarto de la pared inferior o de intoxicación medicamentosa. El objetivo de este relato fue presentar un caso de bloqueo atrioventricular de 2° grado tipo I de Mobitz después de la aplicación de penicilina benzatina. RELATO DEL CASO: Paciente que presentó síncope y sudoración después de la aplicación de penicilina benzatina. En el examen físico sudaba, estaba bradicárdico y con ritmo irregular. Fue realizado el electrocardiograma (ECG que mostraba un bloqueo atrioventricular de 2° del tipo I de Mobitz. Se le administró atropina 0,5 mg por vía venosa. Después de una hora, fue repetido el ECG que presentaba un trazado normal. El paciente permaneció seis horas asintomático y entonces recibió el alta. CONCLUSIONES: El bloqueo atrioventricular de 2° grado del tipo I de Mobitz surgió después de la aplicación de la penicilina benzatina.BACKGROUND AND

  11. Bloqueio do plexo braquial por via interescalênica: efeitos sobre a função pulmonar Bloqueo del plexo braquial por vía interescalénica: efectos sobre la función pulmonar Interscalene brachial plexus block: effects on pulmonary function

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    Alexandre Hortense

    2010-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A via interescalênica é um dos acessos mais comumente utilizados no bloqueio do plexo braquial. Todavia, tem-se demonstrado associação dessa técnica com o bloqueio do nervo frênico ipsilateral. A disfunção diafragmática daí resultante provoca alterações na mecânica pulmonar, potencialmente deletérias em pacientes com limitação da reserva ventilatória. O objetivo do estudo foi avaliar a repercussão do bloqueio interescalênico sobre a função pulmonar por meio da medida da capacidade vital forçada (CVF. MÉTODO: Estudo duplamente encoberto com 30 pacientes, estado físico I ou II (ASA, distribuídos aleatoriamente em dois grupos de15. Foi administrada solução a 0,5% de ropivacaína (Grupo Ropi ou bupivacaína a 0,5% com epinefrina (Grupo Bupi. O bloqueio foi realizado utilizando estimulador de nervo periférico e sendo injetados 30 mL de anestésico local. Quatro espirometrias foram realizadas em cada paciente: antes do bloqueio, 30 minutos, 4 e 6 horas após. Os pacientes não receberam sedação. RESULTADOS: Um paciente do Grupo Ropi e três pacientes do Grupo Bupi foram excluídos do estudo por falha de bloqueio. A redução da CVF no Grupo Ropi foi máxima aos 30 minutos (25,1% e a partir de então houve tendência progressiva à recuperação. Já com bupivacaína, a redução da CVF pareceu ser menos acentuada nos diversos momentos estudados; observou-se redução adicional entre 30 minutos (15,8% e 4 horas (17,3%, sendo esta sem diferença estatística. A partir de 4 horas, notou-se tendência à recuperação. Em ambos os grupos, após 6 horas de bloqueio a CVF encontra-se ainda abaixo dos valores prévios. CONCLUSÕES: O bloqueio interescalênico reduz a CVF na maioria dos casos; as alterações foram mais acentuadas no Grupo Ropivacaína.JUSTIFICATIVA Y OBJETIVOS: La vía interescalénica es uno de los accesos más a menudo utilizados en el bloqueo del plexo braquial. Sin embargo, se ha

  12. Estudo comparativo dos bloqueios intercostal e interpleural para analgesia pós-operatória em colecistectomias abertas Estudio comparativo de los bloqueos intercostal e interpleural para analgesia pós-operatoria en colecistectomias abiertas Comparative study of intercostal and interpleural block for post-cholecystectomy analgesia

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    Antonio Mauro Vieira

    2003-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A analgesia no pós-operatório é desejada pelos pacientes e tem sido praticada pela maioria dos anestesiologistas. Além dos opióides, os anestésicos locais têm sido utilizados nos bloqueios periféricos e centrais para se obter a analgesia pós-operatória. O objetivo deste estudo foi comparar duas técnicas de bloqueio dos nervos intercostais para analgesia pós-operatória em colecistectomias abertas. MÉTODO: Sessenta pacientes foram submetidos a colecistectomias abertas com incisão subcostal e receberam bloqueio intercostal (Grupo IC, n=30 ou bloqueio interpleural (Grupo IP, n=30, ambos com 100 mg de bupivacaína a 0,5% com adrenalina, para analgesia pós-operatória. Foram avaliados os tempos de analgesia e as queixas relatadas pelos pacientes. RESULTADOS: A qualidade da analgesia foi considerada boa para ambas as técnicas. A duração média de analgesia foi de 505 minutos no grupo IP e 620 minutos no grupo IC, não havendo diferença estatística entre eles. Náuseas, vômitos e dor abdominal leve foram as queixas pós-operatórias mais freqüentes. Não se constatou qualquer complicação pós-operatória associada exclusivamente aos bloqueios, assim como não foi evidenciado nenhum caso de pneumotórax. CONCLUSÕES: Concluiu-se que as técnicas promoveram analgesia satisfatória após colecistectomia, sendo que o bloqueio interpleural apresentou maior facilidade de execução.JUSTIFICATIVA Y OBJETIVOS: La analgesia en el pós-operatorio es deseada por los pacientes y ha sido practicada por la mayoría de los anestesiologistas. Además de los opioides, los anestésicos locales han sido utilizados en los bloqueos periféricos y centrales para obtenerse la analgesia pós-operatoria. El objetivo de este estudio fue comparar dos técnicas de bloqueo de los nervios intercostales para analgesia pós-operatoria en colecistectomias abiertas. MÉTODO: Sesenta pacientes fueron sometidos a colecistectomias

  13. Rol de la mitocondria y el estrés oxidativo en el bloqueo del desarrollo de embriones bovinos producidos in vitro Mitochondrial rol and oxidative stress in the developmental blockade of in vitro produced bovine embryos

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    AM Tarazona

    2010-01-01

    Full Text Available Uno de los mayores obstáculos en la producción de embriones in vitro con fines de investigación básica, comerciales, o de conservación, es el detenimiento temprano del clivaje que ocurre de forma específica en una etapa del desarrollo. Para explicar este fenómeno se han postulado diferentes factores causales como: desórdenes en la cromatina, rearreglos del citoesqueleto, estrés oxidativo y daños mitocondriales. Esta última propuesta ha recibido gran atención, debido a que la mitocondria es fuente de especies reactivas de oxígeno (EROs y el estrés oxidativo es un mediador crítico de procesos fisiológicos y estados patológicos. Durante los últimos años se ha demostrado que el peróxido de hidrógeno (H2O2 es una molécula pivotante capaz de desencadenar muerte celular por diferentes mecanismos que pueden involucrar o no a los factores de transcripción: NFκB - p53, y es ejecutado por caspasas efectoras. Se cree que la mitocondria podría estar jugando un papel importante como productora o como blanco del H2O2, y como mediadora en la muerte por apoptosis de los embriones. El objetivo de esta revisión es mostrar el estado del arte en cuanto a la apoptosis desencadenada por estrés oxidativo y mediada por la mitocondria en los embriones bovinos producidos in vitro, como parte de la explicación del bloqueo del clivaje y la baja eficiencia que aún se tiene en este proceso.One of the biggest obstacles in the in vitro embryo production for basic research, commercial purposes, or conservation, is the blockade of the early cleavage, which occurs on a species-specific manner in a particular stage of development. To explain this phenomenon some causative factors have been postulated such as: disturbances in chromatin, cytoskeleton rearrangement, oxidative stress and mitochondrial damage. The latter has received considerable attention because mitochondrion is a source of reactive oxygen species (ROS, and oxidative stress is a critical

  14. Pain Sensitivity to Intraoral Anesthetic Injections among Children.%儿童口内麻醉注射不同部位对疼痛的敏感性

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    叶宁; 钱虹; 黄群

    2011-01-01

    目的:调查儿童口内麻醉注射不同部位对疼痛的敏感性.方法:160名5~6岁儿童作为调查对象,调查他们对口内上下颌浸润和阻滞麻醉注射的疼痛反应,并将这些反应用声音、眼睛和身体运动(SEM)几方面来定量.结果:疼痛反应无性别差异;鼻腭神经阻滞引起最大疼痛(SEM评分为10分),上牙槽后神经上牙槽后神经上牙槽后神经阻滞和下牙槽神经阻滞产生疼痛最少(SEM分别为3和4);上颌局部麻醉比下颌注射更痛(约7:5).结论:注射的解剖位置是儿童疼痛反应最重要的决定因素之一,优先考虑疼痛反应有助于在年幼儿童的牙科治疗过程中获得最理想的儿童配合.%Objective: To investigate the pain sensitivity to intraoral anesthetic injections among children. Methods: A total of 160 children aged 5-6 years were investigated for their pain reactions to intraoral maxillary and mandibular anesthetic injections, and the responses were quantified using the sound, eye and motor (SEM) scale. Results:There was no significant gender- specific difference in pain reactions. Administration of nasopalatine nerve block produced maximum pain (SEM score: 10) while that of posterior superior alveolar nerve block and inferior alveolar nerve block produced minimum pain (3 and 4, respectively). Administration of local anesthesia in maxilla was more painful than injections into the mandible (approximately 7: 5). Conclusion: Anatomical location of an injection is one of the most important determinants of pediatric pain reaction, and prior consideration for pain reaction may help to achieve optimal behavioral control during dental treatment in young children.

  15. Quality control in dental diagnostic radiology : anomalous in the use of radiological equipment; Control de Calidad en radiologia dental intraoral: anomalias en el funcionamiento de los equipos radiologicos

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    Alcaraz, M.; Martinez-Beneyto, Y.; Jodar, S.; Velasco, E.; Garcia-Vera, M. C.

    2004-07-01

    7,176 official quality control reports on dental diagnostic radiology were studied, relating to dental clinics located in 37 Spanish provinces covering 16 different autonomous Regions. The reports were issued as a result of the entry into force of Royal Decree 2071/1995 on quality control in General Diagnostic Radiology facilities, this Royal Decree was replaced by R. D. 1976/1999. The reports were writen by the UTPR (Technical Unit of Radiological Protection) Agsigma S. A. L., a company approved by the Nuclear Safety Council, and they correspond with the official reports issued during 1996-2001. This meants that a 5-year period has been monitored in order to observe the impacts of the establlishment of this legislation on quality control in intraoral dental diagnostic radiology facilities. The results show that 72.79% of the reports checked in 2001 would comply with the European Union's official recommendation (70 kVp, 8 mA> 1.5 mm of Al and 20 cm collimator length). Significant alterations have detected in a third (30.59%) of the radiological equipment. (Author) 36 refs.

  16. Raquianestesia total após bloqueio do plexo lombar por via posterior: relato de caso Raquianestesia total después del bloqueo del plexo lumbar por vía posterior: relato de caso Total spinal block after posterior lumbar plexus blockade: case report

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    Leonardo Teixeira Domingues Duarte

    2006-10-01

    anestesiologista conhecimento minucioso da anatomia, treinamento na técnica e vigilância constante.JUSTIFICATIVA Y OBJETIVOS: El bloqueo del plexo lumbar puede ser bastante útil en procedimientos quirúrgicos de la cadera, del muslo y de la rodilla, pero exige práctica del anestesiólogo teniendo en cuenta sus potenciales complicaciones. El presente relato tiene como objetivos presentar un caso de raquianestesia total después del bloqueo del plexo lumbar por la vía posterior y discutir el probable mecanismo fisiopatológico. RELATO DEL CASO: Paciente del sexo masculino, 34 años, 97 kg, estado físico ASA I, programado para artroplastia total de la cadera. Fue realizada anestesia general seguida de bloqueo del plexo lumbar derecho por la vía posterior con auxilio de estimulador de nervio periférico. La aguja fue introducida hasta una profundidad de 8 cm, perpendicular a la piel, y a una distancia de 4 cm de la línea media sobre una línea perpendicular al proceso espinoso de L4. Después de la identificación de respuesta motora en el cuadriceps, la intensidad de la corriente de estimulación se redujo hasta 0,35 mA, siendo entonces administrada ropivacaína a 0,5% (39 mL. Durante la inyección, fueron verificadas contracciones intermitentes del cuadriceps. Después del bloqueo, el paciente evolucionó con apnea, hipotensión arterial y midriasis bilateral. Al final de la cirugía, presentaba bloqueo motor en los dos miembros inferiores que solo mejoró nueve horas después de la realización del bloqueo. En el postoperatorio, el paciente se quejó de dolor intenso, recibiendo alta hospitalaria 12 días después de la cirugía sin anormalidades motora o sensitiva. CONCLUSIONES: La identificación del compartimento del psoas, donde está el plexo lumbar, exige la utilización de intensidad de corriente entre 0,5 e 1 mA. La incidencia de respuesta motora con bajas corrientes puede indicar posicionamiento de la aguja dentro del recubrimiento que envuelve la raíz nerviosa y

  17. Bloqueio pleural bilateral: analgesia e funções pulmonares em pós-operatório de laparotomias medianas Bloqueo pleural bilateral: analgesia y funciones pulmonares en pós-operatorio de laparotomias medianas Bilateral pleural block: analgesia and pulmonary functions in postoperative of median laparotomies

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    Karl Otto Geier

    2004-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Não obstante o bloqueio pleural ter sido convertido quase numa panacéia analgésica, resultados contraditórios foram publicados. O objetivo deste estudo foi observar o desempenho analgésico e espirométrico das funções pulmonares no pós-operatório imediato de 21 pacientes com o bloqueio pleural bilateral em laparotomias medianas de urgência. MÉTODO: Bloqueio pleural bilateral foi realizado em decúbito dorsal horizontal em 21 pacientes com 20 ml de bupivacaína a 0,375% com adrenalina a 1:400.000 administrados por cateter em cada hemitórax durante o pós-operatório imediato. Soluções aleatórias de bupivacaína e de solução fisiológica foram administradas por residentes ou enfermeiras que desconheciam o conteúdo das seringas, e seus desfechos analgésicos avaliados de acordo com a escala de dor Prince Henry ao comparar os valores pré e pós-bloqueio pleural bilateral. Em função da dor pós-operatória, testes espirométricos das funções pulmonares também foram determinados mediante espirômetro portátil. RESULTADOS: Analgesia pós-operatória, com duração média de 247,75 ± 75 minutos foi constatada em todos os pacientes com a bupivacaína, embora tenha persistido dor residual de menor intensidade na região suprapúbica em cinco pacientes (8% e em dois pacientes na apófise xifóide (3,2%. Nenhum efeito analgésico foi obtido com solução fisiológica. Face à dor pós-operatória, as funções pulmonares, avaliadas antes e após os bloqueios, registraram melhora com a bupivacaína na CVF (p JUSTIFICATIVA Y OBJETIVOS: No obstante el bloqueo pleural haber sido convertido casi en una panacea analgésica, fueron publicados resultados contradictorios. El objetivo de este estudio fue observar el desempeño analgésico y espirométrico de las funciones pulmonares en el pós-operatorio inmediato de 21 pacientes con el bloqueo pleural bilateral en laparotomias medianas de urgencia. M

  18. Síndrome de Tako-Tsubo em decorrência de bloqueio neuromuscular residual: relato de caso Síndrome de Tako-Tsubo como consecuencia de bloqueo neuromuscular residual: relato de caso Tako-Tsubo syndrome secondary to residual neuromuscular blockade: case report

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    Marcos Guilherme Cunha Cruvinel

    2008-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A síndrome de Tako-Tsubo é uma complicação pós-operatória rara, com mortalidade em torno de 5%. O objetivo deste relato é apresentar o bloqueio neuromuscular residual como fator desencadeante da referida síndrome, discutir sobre a mesma e alertar sobre o bloqueio neuromuscular residual. RELATO DO CASO: Paciente do sexo feminino, 61 anos, estado físico ASA I, submetida à anestesia geral associada a bloqueio paravertebral cervical para reparo artroscópico de lesão de manguito rotator. Após extubação foi evidenciado bloqueio neuromuscular residual por meio do exame clínico. Na sala de recuperação pós-anestésica evoluiu com sonolência, taquicardia, hipertensão arterial e acidose respiratória grave. Após a reintubação, evoluiu com parada cardíaca em atividade elétrica sem pulso, revertida com adrenalina e massagem cardíaca externa. Apresentou no pós-operatório elevação de segmento ST, aumento de troponina e acinesia de segmento médio-apical de ventrículo esquerdo com fração de ejeção estimada em 30%. A cineangiocoronariografia mostrou coronárias isentas de ateromatose significativa e grave comprometimento da função sistólica com acinesia inferior e ântero-septo-apical com hipercontratilidade compensatória de suas porções basais. Com o tratamento instituído houve recuperação funcional completa. CONCLUSÕES: O bloqueio neuromuscular residual associado à paralisia diafragmática e possível atelectasia pulmonar levando a insuficiência respiratória, hipercapnia e descarga adrenérgica foram os fatores desencadeantes da síndrome de Tako-Tsubo com sua grave repercussão clínica.JUSTIFICATIVA Y OBJETIVOS: El Síndrome de Tako-Tsubo es una complicación postoperatoria rara con una mortalidad en torno de un 5%. El objetivo de este relato es presentar el bloqueo neuromuscular residual como factor desencadenante del referido síndrome, discutir sobre él y alertar sobre el bloqueo

  19. Anestesia peridural lombar ou bloqueio do plexo lombar combinados à anestesia geral: eficácia e efeitos hemodinâmicos na artroplastia total do quadril Anestesia epidural lumbar o bloqueo del plexo lumbar combinados con la anestesia general: eficacia y efectos hemodinámicos en la artroplastia total de la cadera Epidural lumbar block or lumbar plexus block combined with general anesthesia: efficacy and hemodynamic effects on total hip arthroplasty

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    Leonardo Teixeira Domingues Duarte

    2009-12-01

    avanzada y de las enfermedades asociadas a los pacientes. El objetivo del estudio, fue evaluar si el bloqueo del plexo lumbar combinado con la anestesia general, equivale a la anestesia epidural lumbar en cuanto a la eficacia del bloqueo nociceptivo, efectos hemodinámicos secundarios, dificultad en su ejecución e influencia en el sangramiento operatorio en pacientes sometidos a la ATC. MÉTODO: Pacientes estado físico ASA I a III que fueron ubicados aleatoriamente en los grupos Epidural y Lumbar. En el grupo Epidural, se realizó la anestesia epidural lumbar continua con la ropivacaína a 0,5% 10 a 15 mL. En el grupo Lumbar, fue realizado el bloqueo del plexo lumbar por la vía posterior con ropivacaína a 0,5% 0,4 mL.kg-1. Todos los pacientes fueron sometidos a la anestesia general. Se estudiaron: la dificultad en la ejecución de los bloqueos, su eficacia y los efectos hemodinámicos secundarios. RESULTADOS: Cuarenta y un pacientes fueron incluidos en el estudio. El tiempo para la ejecución del bloqueo epidural fue menor, pero el número de intentos en colocar la aguja fue similar en los dos grupos. El bloqueo epidural fue más eficaz. En el grupo Lumbar, se registró un aumento de la presión arterial diastólica y media (PAM y en el doble producto. Después de la incisión, el consumo anestésico durante la operación fue mayor. Posteriormente al bloqueo, la PAM fue menor en los 50, 60 y 70 minutos después de la realización del bloqueo epidural. El sangramiento fue parecido en los dos grupos. CONCLUSIONES: La técnica epidural promovió un bloqueo nociceptivo más eficaz sin asociarse a la inestabilidad hemodinámica, cuando se le combinó con la anestesia general. El bloqueo del plexo lumbar fue una técnica útil en combinación con la anestesia general cuando la anestesia epidural estuvo contraindicada.BACKGROUND AND OBJECTIVES: Anesthesia for total hip arthroplasty (THA is a challenge due to the advanced age and associated diseases of patients. The objective

  20. Dispersión del QRS como índice de disincronía en el bloqueo de rama izquierda y de sincronía tras la terapia de resincronización cardíaca, una variable de respuesta exitosa / QRS dispersion as an index of dyssynchrony in left bundle branch block and of

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    Elibet Chávez González

    2015-08-01

    Full Text Available Introducción: En pacientes con insuficiencia cardíaca, el bloqueo de rama izquierda del haz de His constituye un importante marcador de mal pronóstico, en ellos la tera-pia de resincronización puede mejorar la función del ventrículo izquierdo. Objetivo: Describir variables electrocardiográficas asociadas a una mejor respuesta de la resincronización cardíaca. Método: Se estudiaron 19 pacientes, 7 mujeres y 12 hombres con bloqueo de rama izquierda y fracción de eyección ≤ 35 %. Se realizó electrocardiograma antes y des-pués de la terapia de resincronización, medición del QRS en las doce derivaciones y cálculo de su dispersión, se midieron voltajes máximos del QRS, y se realizaron eco-cardiografías antes y después del procedimiento. Resultados: La fracción de eyección se incrementó desde 29,8±4,7 hasta 41,2±10,7 % (p=0.000. La correlación lineal entre fracción de eyección y dispersión del QRS a los seis meses de seguimiento fue significativa (r=0.34 y p=0.02; las mujeres presentaron mayor dispersión del QRS (48,0±24,0 vs. 37,14±13,8 ms; p=0.04. Los voltajes del QRS fueron predominantemente negativos en aVR (-0,52±0,58 vs. 0,28±0,42 mvolt; p=0.032 y positivos en V5 (0,71±1,12 vs. -0,15±1,20 mvolt; p=0.023 para los responde-dores en relación con los no respondedores. Conclusiones: La dispersión del QRS incrementada en el electrocardiograma con blo-queo de rama izquierda y la disminución de la dispersión del QRS posresincronización demostraron correlaciones significativas con la fracción de eyección; además, el es-trechamiento del QRS tras la resincronización fue significativo para los respondedo-res. Los voltajes predominantemente positivos en aVR y negativos en V5, pudieran predecir cuáles pacientes no responderán adecuadamente a la terapia de resincroni-zación cardíaca.

  1. Bloqueo neurolítico del tercer ganglio simpático dorsal en pacientes con síndrome de Raynaud: Una serie de casos Neurolytic blocking third dorsal simpathetic ganglion in patients with Raynaud´s syndrome: A number of cases

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    J. A. Flores Cantisani

    2013-04-01

    Full Text Available Introducción: El fenómeno de Raynaud es un trastorno vascular, frecuente en la población general, que consiste en la aparición paroxística de espasmo vascular distal, en pequeñas arterias y arteriolas cutáneas de las extremidades, con escasa repercusión sistémica. Existen bases anatómicas y fisiológicas para producir un bloqueo simpático selectivo utilizando agentes neurolíticos en los ganglios torácicos T2 y T3, considerados estaciones sinápticas que se distribuyen en el miembro superior. Objetivo: Determinar la eficacia del bloqueo neurolítico del tercer ganglio dorsal en el síndrome de Raynaud de una serie de casos. Material y métodos: Se realizó la revisión de expedientes de una serie de ocho casos con fenómeno de Raynaud de causa multifactorial, en la Clínica del Dolor de la Unidad Médica de Alta Especialidad Monterrey; Nuevo León, México. Casos: Ocho casos de 41 a 72 años de edad con fenómeno de Raynaud, tratados médicamente, a los cuales se les realizaron simpaticolisis del tercer ganglio dorsal. Conclusiones: El fenómeno de Raynaud tiene una prevalencia que va del 1 al 25%, en este hay una actividad simpática aumentada por lo que al realizar una simpaticolisis selectiva se logra mejorar el dolor isquémico, el cual está determinado por la insuficiencia total o parcial en el aporte de oxígeno a los tejidos, además de que tenemos bases anatómicas y fisiológicas para limitar el bloqueo a los ganglios T2 y T3, considerados como las estaciones sinápticas que interrumpen los impulsos que se distribuyen en el miembro superior, siendo por tanto más selectivos y con menores efectos adversos para el paciente.Background: Raynaud's phenomenon, a vascular disorder that is common in the general population, consists of paroxysmal onset distal vasospasm in small cutaneous arteries and arterioles of extremities, usually with little systemic impact. There are anatomical and physiological bases to produce a selective

  2. 口内入路磨削法下颌缩小成形术%Intraoral approach for abrasive mandibular reduction osteoplasty

    Institute of Scientific and Technical Information of China (English)

    张元龙; 王新灿; 程宁新

    2009-01-01

    目的 探讨口内入路磨削法下颌缩小成形术的临床效果及操作要点.方法 对598例采用口内入路磨削法下颌缩小成形术,磨削范围包括咬合线以下的升支后缘及下齿槽管外侧的下颌骨外板、下颌角、部分升支下部及颏孔后部分的下颌缘全层骨质.术前、术后摄取头颅定位正、侧位X线片和照片.结果 磨削后下颌骨升支下部和体部缩窄,下颌角缩小并提升,外形改善明显,下颌角角度、下颌平面角、前颅底平面角、面下宽度均较术前明显改变(P<0.01).术后随访168例,优良率为95.24%.结论 口内入路磨削法下颌缩小成形术,可以在矫正下颌角肥大的同时去除部分下颌骨外侧皮质层,基本可以达到下颌角截骨术和骨外板劈除术的效果,且操作准确、简便易行.%Objective To verify the clinical reliability of a simple abrasive method for reduction mandibular osteoplasty.Methods A total of 598 cases of reduction mandibular osteoplasty were performed by using the abrasive method since 2002.Through intraoral incisions,the low part of mandibular ramus,angle region,buucal cortice and inferior border of mandible were exposed and abrasive osteoplasty was taken with special designed retractors,rasp and grinding burs with protecting sheath.The inferior alveolar nerve could be preserved.Results There was no nerve injury and only one hemorrhage case during operation without unfavorable result.In 6 to 1~2 months follow-up for 168 cases,the satisfactory rate for contour results was 95.24%.Conclusion Through the intraoral approach,the abrasive mandibular reduction osteoplasty is a simple,safe and effective method for mandibular osteoplasty.It is not to correct the prominent mandibular angle but to reduce the thickness of the mandibular ramus and body.This method could contribute the same results of angle ostectomy and split cortical bone ostectomy and result a good contour of the jaw region.

  3. Ropivacaína em bloqueio peridural torácico para cirurgia plástica Ropivacaína en bloqueo peridural torácico para cirugía plástica Thoracic epidural anesthesia with ropivacaine for plastic surgery

    Directory of Open Access Journals (Sweden)

    José Roberto Nociti

    2002-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio peridural torácico constitui técnica de anestesia hipotensiva, capaz de reduzir o sangramento no campo operatório. O presente estudo não-comparativo tem por finalidade observar os resultados do bloqueio peridural torácico com ropivacaína a 0,5% associado a sedação com infusão contínua de propofol em cirurgia plástica. MÉTODO: Participaram do estudo sessenta pacientes do sexo feminino com idades entre 18 e 62 anos, estado físico ASA I ou II, submetidas a cirurgias plásticas combinadas envolvendo mama, abdômen, glúteos, lipoaspiração. Após punção peridural em T9-T10 ou T10-T11, receberam 40 ml de solução de ropivacaína a 0,5% e sufentanil 15 µg. Doses subseqüentes do anestesia local foram administradas através de cateter quando necessárias. Sedação foi obtida com infusão venosa contínua de propofol 40 a 50 µg.kg-1.min-1. Foram avaliadas as características de instalação e regressão do bloqueio, a evolução dos parâmetros hemodinâmicos e respiratórios, a incidência de eventos adversos. RESULTADOS: O nível superior de bloqueio sensorial foi T2 em 52 pacientes (86,6%, C4 em 4 (6,6% e T3 em 4 (6,6%. A média para o tempo de latência foi 9,1 ± 8,2 minutos. Obteve-se bloqueio motor grau 2 em 61,7% das pacientes e grau 1 em 38,3%. A média para o tempo de regressão completa do bloqueio motor foi 377,9 ± 68,5 minutos. A média para o tempo da primeira queixa espontânea de dor foi 965,1 ± 371,3 minutos. Os valores médios de PAS, PAD, PAM e FC decresceram significativamente em relação ao controle a partir dos 15 min após a injeção do anestésico local, caracterizando anestesia hipotensiva. Treze pacientes (21,7% que apresen- taram PAS JUSTIFICATIVA Y OBJETIVOS: El bloqueo peridural torácico constituye técnica de anestesia hipotensiva, capaz de reducir el sangramiento en el campo operatorio. El presente estudio no-comparativo tiene por finalidad observar los

  4. Bloqueio dos nervos femoral e isquiático guiados por ultrassom em paciente anticoagulado: case reports Bloqueo de los nervios femoral e isquiático guiados por ultrasonido en paciente anticoagulado Ultrasound-guided femoral and sciatic nerve blocks in an anticoagulated patient: relato de casos

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    Leonardo Henrique Cunha Ferraro

    2010-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O uso de ultrassom para guiar a punção em bloqueios de nervos periféricos tem-se tornado cada vez mais frequente. Com a menor probabilidade de promover lesões vasculares, o ultrassom torna-se uma ferramenta interessante na realização de bloqueios periféricos, especialmente nos pacientes em uso de anticoagulantes ou com distúrbios da coagulação. O objetivo foi relatar dois casos em que se realizaram os bloqueios isquiático e femoral guiados por ultrassom em pacientes anticoagulados. RELATO DOS CASOS: No primeiro caso, a cirurgia realizada consistiu na amputação de antepé esquerdo devido a necrose e sinais de infecção e, no segundo caso, em limpeza cirúrgica de joelho esquerdo. Os pacientes apr esentavam distúrbios de coagulação com atividade de protrombina e tempo de tromboplastina ativado acima dos valores da normalidade. Ambos os pacientes foram submetidos a bloqueio femoral e isquiático guiados por ultrassom, evoluindo sem alteração motora ou sensitiva nos territórios desses nervos e sem hematoma no local da punção. CONCLUSÕES: A anticoagulação impõe certas restrições à aplicação das técnicas anestésicas regionais clássicas. Com o avanço dos equipamentos e métodos de ultrassom, hoje é possível identificar com alta precisão estruturas vasculares e neurais. Isso possibilita que a punção guiada por ultrassom seja mais precisa, tanto para atingir a área de interesse como para minimizar os riscos de lesão vascular acidental. Até o presente, não se recomenda a realização de bloqueio periférico em pacientes anticoagulados ou portadores de coagulopatias. Entretanto, considerando que há poucos relatos sobre bloqueios regionais com ultrassom em situações de coagulopatias, a segurança de tal técnica nessas condições ainda não foi estabelecida.JUSTIFICATIVA Y OBJETIVOS: El uso del ultrasonido para guiar la punción en bloqueos de nervios periféricos se ha convertido

  5. Bloqueo de los nervios iliohipogástrico e ilioinguinal para analgesia posquirúrgica en cesárea tipo Pfannenstiel realizada bajo anestesia general: ¿qué concentración del anestésico local usar? Iliohypogastric and ilioinguinal block for postsurgical analgesia after pfannenstiel cesarean section performed under general anaesthesia

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    Héctor Iván García García

    1998-03-01

    Full Text Available El bloqueo bilateral de los nervios Iliohipogástrico e Ilioinguinal con bupivacaína al 0.5% puede proveer analgesia luego de cesárea con incisión de Pfannenstiel aunque la cantidad de droga usada está cerca de la dosis máxima segura. Diseñamos este estudio para comparar el efecto analgésico de la bupivacaína al 0.5% y diluida al 0.25%. Se incluyeron treinta pacientes aleatoriamente asignadas a un grupo de estudio (bupivacaína 0.25%, n= 15 y uno de control (bupivacaína 0.5%, n=15. Se evaluaron las pacientes con una Escala Visual Análoga (EVA a las O, 4, 8, 12 y 24 horas posoperatorias por médicos que no sabían a qué grupo pertenecían y sólo en caso de necesidad se prescribió analgesia IM con Diclofenaco. Los puntajes de analgesia y los requerimientos de anal. gesia complementaria fueron notoriamente simila. res en ambos grupos y no hubo diferencias estadísticamente significativas. Concluimos que el bloqueo de estos nervios es una técnica analgésica efectiva (el dolor siempre estuvo en promedio por debajo de 4 en la EVA, que no es afectada por la dilución del anestésico y que además es segura pues no se presentaron complicaciones. The Iliohypogastric and Ilioinguinal bilate. ral block with 0.5% bupivacaine can provide analgesia after Pfannenstiel cesarean section although the required amount of the drug is near the maximum secure dose. We designed this study in order to compare the analgesic effect of 0.5% bupivacaine and diluted 0.25% bupivacaine. Thirty patients were included in the study and asigned in aleatory form to either a study (0.25% bupivacaine n=15 or a control group (0.5% bupivacaine n=15. They were evaluated with the Visual Analogue Scale (VAS at 0,4,8,12,24 postoperative hours by physicians who did not know the group of the patient and prescribed intramuscular analgesia with Dicofenac only if required. The analgesia scores and the complementery analgesia requirements were similar in both groups and there were

  6. Bloqueo ciático continuo con catéter estimulador guiado mediante ecografía para tratamiento del miembro fantasma doloroso Ultrasound-guided continuous sciatic nerve block with stimulating catheter for the treatment of phantom limb pain

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    A. Martínez Navas

    2009-02-01

    Full Text Available Los bloqueos nerviosos periféricos pueden ser una alternativa a la analgesia intravenosa y epidural en el tratamiento del miembro fantasma doloroso. La dificultad en la localización del nervio ciático mediante neuroestimulación en pacientes con arteriopatía periférica y neuropatía puede verse aumentada por el hecho de presentar una amputación del miembro inferior, que imposibilita la observación de una respuesta motora en el pie coincidiendo con la localización del nervio. En estos casos, la ecografía puede convertirse en una técnica de localización nerviosa determinante del éxito de la analgesia ya que permite la identificación del nervio, así como la visualización en tiempo real de la posición relativa de la aguja y catéter respecto al nervio y la difusión del anestésico local administrado. Se presenta el caso de un paciente con miembro fantasma doloroso resistente al tratamiento convencional que se controló con un bloqueo ciático continuo con catéter estimulador guiado con ecografía.Peripheral nerve blocks can be an alternative to intravenous and epidural analgesia in the treatment of phantom limb pain. The difficulty of localizing the sciatic nerve through neurostimulation in patients with peripheral arteriopathy and neuropathy can be increased by lower limb amputation, making it impossible to observe a motor response in the foot coinciding with localization of the nerve. In these cases, ultrasonography can become a technique for nerve localization and determine the success of analgesic strategy, since it allows nerve identification, as well as visualization in real time of the relative position of the needle and catheter with respect to the nerve and the diffusion of the local anesthetic administered. We report the case of a patient with phantom limb pain refractory to conventional treatment, in whom pain control was achieved by ultrasound-guided continuous sciatic block with stimulating catheter.

  7. Estudo radiológico da dispersão de diferentes volumes de anestésico local no bloqueio de plexo braquial pela via posterior Estudio radiológico de la dispersión de diferentes volúmenes de anestésico local en el bloqueo de plexo braquial por vía posterior Radiological evaluation of the spread of different local anesthetic volumes during posterior brachial plexus block

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    Marcos Guilherme Cunha Cruvinel

    2005-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A dispersão do anestésico local no bloqueio interescalênico foi bem estudada, porém no bloqueio pela via posterior são poucos os estudos. O objetivo deste estudo foi determinar a dispersão de diferentes volumes de anestésico local nesta técnica através de exame radiológico contrastado. MÉTODO: Dezesseis pacientes submetidos a bloqueio do plexo braquial pela via posterior, 15 foram divididos aleatoriamente em três grupos de cinco: Grupo 1: volume de 20 mL; Grupo 2: volume de 30 mL; Grupo 3: volume de 40 mL. Em um paciente, submetido a bloqueio contínuo do plexo braquial pela via posterior, a administração de um volume de 10 mL foi estudada. Em todos, o anestésico usado foi a ropivacaína a 0,375% associada a solução radiopaca. Foram feitas radiografias da região cervical imediatamente após o bloqueio que foi avaliado através da pesquisa de sensibilidade térmica utilizando-se algodão embebido em álcool, 30 minutos após a sua realização e na sala de recuperação pós-anestésica. RESULTADOS: O comportamento radiológico e clínico do bloqueio de plexo braquial pela via posterior é muito semelhante aquele descrito com a técnica de Winnie (interescalênico. Invariavelmente há envolvimento do plexo cervical e das raízes mais altas (C5-C7 do plexo braquial. CONCLUSÕES: Este estudo mostra que a dispersão do anestésico local no bloqueio do plexo braquial pela via posterior se dá primariamente nas raízes responsáveis pela inervação do ombro.JUSTIFICATIVA Y OBJETIVOS: La dispersión del anestésico local en el bloqueo interescalénico fue bien estudiada; en el bloqueo por la vía posterior son pocos los estudios. El objetivo de este estudio, fue determinar la dispersión de diferentes volúmenes de anestésico local en esta técnica a través de examen radiológico contrastado. MÉTODO: Dieciséis pacientes sometidos a bloqueo del plexo braquial por vía posterior, 15 fueron divididos

  8. Bloqueio extraconal para facectomia com implante de lente intra-ocular: influência da via de acesso (superior ou inferior na qualidade da anestesia Bloqueo extraconal para facectomia con implantación de lente intra-ocular: influencia de la vía de acceso (superior o inferior en la calidad de la anestesia Extraconal block for cataract extraction surgery with implantation of intraocular lens: influence of access way (upper or lower in anesthetic outcome

    Directory of Open Access Journals (Sweden)

    Daniel Espada Lahoz

    2003-08-01

    implante de lente intra-ocular.JUSTIFICATIVA Y OBJETIVOS: En las intervenciones quirúrgicas para oftalmología no se encontró técnica de anestesia totalmente segura, la introducción de la anestesia extraconal hizo que aumentasen las indicaciones de cirugías oculares con bloqueo, ya que la incidencia de complicaciones graves es menor, un hecho ya descrito por Hay, en 1991. Los bloqueos extraconales pueden ser realizados por varias vías de acceso, entre ellas, la superior y la inferior. El objetivo de este estudio fue evaluar cual vía de acceso (superior o inferior promueve bloqueo anestésico de mejor calidad. MÉTODO: Fueron incluidos en este estudio 164 pacientes, de ambos sexos, con edades entre 23 y 92 años, estado físico ASA I a IV, índice cardíaco 1 y 2 de Goldman, con indicación de facectomia con implantación de lente intra-ocular. Los pacientes fueron distribuidos aleatoriamente en dos grupos de 82 de acuerdo con la vía de acceso primaria del bloqueo extraconal: grupo ES (extraconal superior y EI (extraconal inferior. La calidad del bloqueo fue evaluada por el aparecimiento de dolor en el per-operatorio, manutención de movimentación de las pálpebras o del globo ocular, persistencia del reflejo de Bell, número de bloqueos realizados para la obtención de condiciones quirúrgicas y evaluación del bloqueo por el cirujano. RESULTADOS: La vía de acceso superior presentó mayor incidencia de acinesis de pálpebras (Vía superior - 56,1%; vía inferior - 36,6% del músculo recto superior (vía superior 93,9%; vía inferior 65,9%, así como menor necesidad de bloqueos complementares (vía superior 29,3%; vía inferior 42,7%. La vía de acceso inferior presentó mayor acinesis del músculo recto inferior (vía superior 72%; vía inferior - 84,1% sin diferencia estadística. CONCLUSIONES: En las condiciones de este estudio, la vía extraconal superior demostró que es superior en relación a la vía extraconal inferior, como vía de acceso primaria para

  9. Intraoral radiology in general dental practices. A comparison of digital and film-based X-ray systems with regard to radiation protection and dose reduction

    International Nuclear Information System (INIS)

    Purpose: The purpose of this study was to gain insight into the distribution and application of digital intraoral radiographic techniques within general dental practices and to compare these with film-based systems in terms of patient dose reduction. Materials and Methods: 1100 questionnaires were handed out to general dental practitioners. Data was analyzed with respect to the type of system by using descriptive statistics and nonparametric tests, i.e. Kruskal-Wallis, Mann-Whitney and chi-square test (SPSS 20). Results: 64% of the questioned dentists still use film-based radiology, 23% utilize storage phosphor plate (SPP) systems and 13% use a charge-coupled device (CCD). A strong correlation between the number of dentists working in a practice and the use of digital dental imaging was observed. Almost 3/4 of the film users work with E- or F-speed film. 45% of them refuse to change to a digital system. The use of lead aprons was popular, while only a minority preferred thyroid shields and rectangular collimators. A fourfold reduction of exposure time from D-speed film to CCD systems was observed. Due to detector size and positioning errors, users of CCD systems take significantly more single-tooth radiographs in total. Considering the number of radiographs per patient, there is only a slight tendency towards more X-rays with CCD systems. Up to image generation, digital systems seem to be as or even more difficult to handle than film-based systems, while their handling was favored after radiographic exposure. Conclusion: Despite a slight increase of radiographs taken with CCD systems, there is a significant dosage reduction. Corresponding to the decrease in exposure time, the patient dose for SPP systems is reduced to one half compared to film. The main issues in CCD technology are positioning errors and the size of the X-ray detectors which are difficult to eliminate. The usage of radiation protection measures still needs to be improved. (orig.)

  10. Intraoral radiology in general dental practices. A comparison of digital and film-based X-ray systems with regard to radiation protection and dose reduction

    Energy Technology Data Exchange (ETDEWEB)

    Anissi, H.D. [Ulm Univ. (Germany). Dentistry; Geibel, M.A. [Ulm Univ. (Germany). Dept. of Dentomaxillofacial Surgery

    2014-08-15

    Purpose: The purpose of this study was to gain insight into the distribution and application of digital intraoral radiographic techniques within general dental practices and to compare these with film-based systems in terms of patient dose reduction. Materials and Methods: 1100 questionnaires were handed out to general dental practitioners. Data was analyzed with respect to the type of system by using descriptive statistics and nonparametric tests, i.e. Kruskal-Wallis, Mann-Whitney and chi-square test (SPSS 20). Results: 64% of the questioned dentists still use film-based radiology, 23% utilize storage phosphor plate (SPP) systems and 13% use a charge-coupled device (CCD). A strong correlation between the number of dentists working in a practice and the use of digital dental imaging was observed. Almost 3/4 of the film users work with E- or F-speed film. 45% of them refuse to change to a digital system. The use of lead aprons was popular, while only a minority preferred thyroid shields and rectangular collimators. A fourfold reduction of exposure time from D-speed film to CCD systems was observed. Due to detector size and positioning errors, users of CCD systems take significantly more single-tooth radiographs in total. Considering the number of radiographs per patient, there is only a slight tendency towards more X-rays with CCD systems. Up to image generation, digital systems seem to be as or even more difficult to handle than film-based systems, while their handling was favored after radiographic exposure. Conclusion: Despite a slight increase of radiographs taken with CCD systems, there is a significant dosage reduction. Corresponding to the decrease in exposure time, the patient dose for SPP systems is reduced to one half compared to film. The main issues in CCD technology are positioning errors and the size of the X-ray detectors which are difficult to eliminate. The usage of radiation protection measures still needs to be improved. (orig.)

  11. Bloqueio bilateral do nervo pudendo para hemorroidectomia em paciente acondroplásico: relato de caso Bloqueo bilateral del nervio pudendo para hemorroidectomía en paciente acondroplásico: relato de caso Bilateral blockade of the pudend nerve to hemorrhoidectomy in achondroplasic patient: case report

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    Bruno Salomé de Morais

    2006-04-01

    ética espontánea. La anestesia de esos pacientes presenta varias particularidades. El objetivo del presente relato fue el de describir un caso de paciente acondroplásico, con previo historial de intervención quirúrgica de la columna para descompresión medular, sometido a Hemorroidectomía a través de bloqueo bilateral de los nervios pudendos. RELATO DEL CASO: Paciente del sexo masculino, 47 años, acondroplásico, que fue ingresado para la realización de hemorroidectomía.Al hacérsele el examen físico presentaba el cuello acortado con extensión limitada de la cabeza, Mallampati clase IV, distancia tireomentoniana de 6 cm y abertura de la boca de 3,5 cm. La columna vertebral presentaba cifosis torácica y lordosis lumbar acentuada, además de cicatriz quirúrgica en la región lumbar. Fue realizado el bloqueo bilateral de los nervios pudendos con ropivacaina a 1%, por vía transperineal, con una aguja aislada de 0,8 mm x 100 mm 21G (Stimuplex A100 BBraun, Melsungen, Germany conectada al estimulador de nervios periféricos (Stimuplex-DIG, BBraun.El paciente fue colocado en decúbito ventral y la cirugía iniciada después de 15 minutos da administración del anestésico. Durante todo el procedimiento, el paciente permaneció consciente y no relató ningún dolor o incomodidad. Hasta el momento del alta hospitalaria (22h después de la realización del bloqueo, el paciente no refirió dolor, incomodidad, náusea, vómito, bloqueo motor, retención o incontinencia urinaria. Después del alta, evolucionó bien presentando evacuación después de 31 horas de efectuada la cirugía. CONCLUSIONES: El caso mostró el uso del bloqueo bilateral de los nervios pudendos, con el auxilio del neuroestimulador como técnica anestésica aislada para la hemorroidectomía.BACKGROUND AND OBJECTIVES: The achondroplasic dwarfism or achondroplasia is the most common form of dwarfism and occurs, in most of the cases, as a result of spontaneous genetic alteration. The anesthesia in these

  12. Anestesia do tronco encefálico após bloqueio retrobulbar extraconal: é possível evitar? Relato de caso Anestesia del tronco encefálico después de bloqueo retrobulbar extraconal: ¿se puede evitar? Relato de caso Brainstem anesthesia after extraconal retrobulbar block: can it be avoided? Case report

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    Haroldo Maciel Carneiro

    2007-08-01

    bloqueios anestésicos realizados em oftalmologia. Ressalta-se a importância do conhecimento desta e de outras complicações pela equipe cirúrgica, com necessidade de preparo e de monitorização adequada para que se diagnostique a possível complicação e se instale prontamente o tratamento, objetivando riscos mínimos para o paciente.JUSTIFICATIVA Y OBJETIVOS: El CEROF-HC es una institución pública especializada en oftalmología. La realización de bloqueos anestésicos para intervenciones quirúrgicas oftálmicas es una práctica común y eficiente. Como técnica no está exenta de riesgos, existe la posibilidad de perforación de meninges y la inyección de anestésico local (AL en la región del sistema nervioso central (SNC. El objetivo de este relato fue mostrar un caso de anestesia del tronco encefálico como complicación del bloqueo oftálmico y destacar la profilaxis del accidente y el tratamiento de las complicaciones. RELATO DE CASO: Paciente del sexo femenino, 60 años, ASA II, con diagnóstico de catarata grado II, indicada para facectomía con implante de lente intraocular en el ojo derecho. Hoja clínica de hipertensión arterial y antecedente de vitrectomía. Exámenes físicos, laboratoriales y cardiológicos normales. Fue realizado bloqueo retrobulbar extraconal con anestésico local (lidocaína y bupivacaína e hialuronidasis (volumen total de 5 mL. Inmediatamente después, la paciente presentó apnea y pérdida de la conciencia. Fue tratada con intubación traqueal (IOT y ventilación mecánica, manteniéndose estable. Se realizó la operación. Empezó a moverse 30 minutos después del IOT, recuperándose totalmente sin presentar ninguna secuela. CONCLUSIONES: El bloqueo oftálmico, a pesar de seguro, no está exento de riesgos. El principal factor de riesgo es la inadecuada realización de la técnica anestésica. El anestésico local (AL, en el bloqueo oftálmico, puede alcanzar el SNC por punción inadvertida de la arteria oftálmica o por

  13. 牵张成骨术在严重牙颌面缺损畸形联合治疗中的应用%Application of Intraoral Distraction Osteogenesis in Treatment of Serious Teeth-maxillofacial Deformity

    Institute of Scientific and Technical Information of China (English)

    陈宇轩; 韩小宪; 牛学刚; 陈书军; 林雪梅; 魏小总

    2014-01-01

    Objective To explore the effect of intraoral distraction osteogenesis in treatment of severe teeth-max-illofacial deformity. Methods A total of 6 patients with severe teeth-maxillofacial deformity during December 2006 and March 2010 underwent the first operation with intraoral distraction osteogenesis techniques. At the second stage, modifi-cation treatments of orthognathic surgery and fibula flap transplantation combined with restorative procedures were per-formed. Results All the patients underwent operations successfully. The new bone formation was good in all patients af-ter distraction osteogenesis without severe complications, and the minimum distance of distraction was 7 mm, the maxi-mum was 30 mm. The occluding relation and deformity were corrected satisfactorily after the second stage treatment. Conclusion The segmental defect or abnormalities of jaw bones can be reconstructed with intraoral distraction osteogene-sis techniques, and has good effect in sequence treatment of severe teeth-maxillofacial deformity, which can provide basis for occluding relation reconstruction and functionality repair.%目的:探讨以牵张成骨术治疗严重牙颌面缺损畸形的效果。方法对2006年12月-2010年3月收治的多类牙颌面缺损畸形患者6例,一期使用内置式牵引器进行牵张成骨术延长,二期采用正颌外科、腓骨瓣移植等方法矫治,配合正畸、牙种植体等修复方法治疗。结果6例均顺利完成治疗,所有患者牵张成骨术后新骨生成良好,最小牵引成骨距离7 mm,最长30 mm,均达到预期牵张目的,无严重并发症发生。经二期常规外科手术及修复治疗后咬合关系和面形均得到恢复。结论牵张成骨术可以有效地修复多种颌面骨缺损或畸形,在严重牙颌面缺损和畸形序列治疗中具有良好的效果,为重建咬合关系和实现功能性修复提供基础。

  14. 64排CT与全景牙片在埋伏牙诊断中的应用%Diagnositic Value of 64-Slice CT and Intraoral Digital Dental Radiography Technique in Embedded Teeth

    Institute of Scientific and Technical Information of China (English)

    陈殿森; 陈望; 滑炎卿

    2011-01-01

    目的:评价64排螺旋CT与口腔全景X线牙片对上颌前部埋伏牙诊断及定位的应用价值.方法:对42例全景X线牙片疑上颌埋伏牙患者行64排螺旋CT扫描,并应用64排螺旋CT图像后处理功能,做三维重建和多层面重建,获取相应牙体的任意平面、任意方位图像.结果:42例患者,38例为上颌前部埋伏牙,25例埋伏牙位于腭侧,9例埋伏牙位于唇侧,4例埋伏牙牙根位于腭侧,而牙冠位于唇侧,经手术证实,符合率100%.结论:多排螺旋CT对儿童上颌埋伏牙能做出精确定位,对上颌埋伏牙诊断及定位的价值优于全景数字X线牙片,可作为上颌埋伏牙临床外科治疗及正畸治疗前的重要检查方法.%Objective: To compare the clinic application of multirow spiral CT (MSCT) and intraoral digital dental radiography technique in location with embedded teeth of children. Methods: Forty-two children suspected for embedded teeth were examined by MSCT and intraoral digital dental radiography technique with multiplanar reformation (MPR) and three dimensional (3D) reconstruction of MSCT. Results: A total of 38 cases of embedded teeth were diagnosed, including 25 embedded teeth located in palate sides, 9 in lip sides, and 4 cases of which the teeth root located in palate sides, and the teeth crown located in lip sides. According to the resluts of surgery, the accurate rate was 100%. Conclusion; Multirow spiral CT can accurately locate embedded teeth of children, and have an obvious advantage over the intraoral digital dental radiography technique in diagnosis and locating of embedded teeth. It is an important method to be applied in examing embedded teeth in upper jaw.

  15. Erratum to "Clinical evaluation of the intraoral fluoride releasing system in radiation-induced xerostomic subjects. Part 2: Phase I study".

    Science.gov (United States)

    Chambers, Mark S; Fleming, Terence J; Toth, Béla B; Lemon, James C; Craven, Timothy E; Bouwsma, Otis J; Garden, Adam S; Espeland, Mark A; Keene, Harris J; Martin, Jack W; Sipos, Tibor

    2007-01-01

    Radiation-induced xerostomia can result in the rapid onset and progression of dental caries in head and neck cancer patients. Topically applied fluorides have been successfully used to inhibit the formation of dental caries in this population. However, because intensive daily self-application is required, compliance is an issue. The intraoral fluoride-releasing system (IFRS) containing a sodium fluoride core is a newly developed, sustained-release, passive drug delivery system that does not require patient involvement except for periodic replacement, thus reducing the effect of patient compliance on its effectiveness in dental caries prevention. Twenty-two head and neck cancer patients from U. T. M. D. Anderson Cancer Center, with radiation-induced xerostomia, were entered into a pilot study to contrast the daily home use of a 0.4% stannous fluoride-gel-containing tray (control group) to IFRS (study group) with respect to tolerability and adherence, and to obtain information on relative caries preventive efficacy. Participants were stratified on the basis of radiation exposure and randomly assigned to treatment with either IFRS or stannous fluoride gel. Patients in both groups were fitted with two IFRS retainers and also were instructed to use a 1100-ppm fluoride conventional sodium fluoride dentifrice twice daily. The study was conducted as a single-blinded, parallel-cell trial. Pre-existing carious lesions were restored prior to the beginning of the study. The efficacy variable was determined by the mean number of new or recurrent decayed surfaces. Patients were examined for caries 4, 8, 12, 24, 36, and 48 weeks after initiation of treatment. Reports of adverse reactions were based on information volunteered by patients and that were elicited during interviews. At baseline, the resting and stimulated salivary flow rates (g/5min) were significantly greater in the control group than in the study group (pIFRS groups during the study period. The rate of new or

  16. Estudo comparativo entre ultrassom e neuroestimulação no bloqueio do plexo braquial pela via axilar Estudio comparativo entre ultrasonido y neuroestimulación en el bloqueo del plexo braquial por la vía axilar A comparative study between ultrasound and neurostimulation guided axillary brachial plexus block

    Directory of Open Access Journals (Sweden)

    Diogo Brüggemann da Conceição

    2009-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O uso do ultrassom em Anestesia Regional vem crescendo. Existem poucos estudos comparando o uso do ultrassom com a neuroestimulação. O objetivo deste estudo foi comparar a execução do bloqueio do plexo braquial pela via axilar guiado por neuroestimulação com dupla injeção e guiado por ultrassonografia em procedimentos cirúrgicos na mão. Para isto, foram comparados o tempo de realização, a taxa de sucesso e complicações. MÉTODO: Após a aprovação do Comitê de Ética em Pesquisa do Hospital Governador Celso Ramos foram selecionados 40 pacientes escalados para operações eletivas na mão com bloqueio de plexo braquial via axilar. Os pacientes foram distribuídos aleatoriamente eletronicamente em dois grupos de 20 pacientes: Grupo Neuroestimulação (NE e Grupo Ultrassonografia (US. Foram comparados tempo de realização, taxa de sucesso e taxa de complicações. RESULTADOS: As taxas de bloqueio completo, falha parcial e falha total não apresentaram diferença estatística significativa entre os grupos US e NE. O tempo médio para realização do procedimento no grupo US (354 segundos não apresentou diferença estatística significativa quando comparado ao grupo NE (381 segundos. Pacientes do grupo NE apresentaram maior taxa de punção vascular (40% quando comparados ao grupo US (10%, p JUSTIFICATIVA Y OBJETIVOS: El uso del ultrasonido en Anestesia Regional ha venido creciendo. Existen pocos estudios comparando el uso del ultrasonido con la neuroestimulación. El objetivo de este estudio, fue comparar la ejecución del bloqueo del plexo braquial por la vía axilar, guiado por neuroestimulación con doble inyección y guiado por ultrasonido en procedimientos quirúrgicos en la mano. Para eso, se compararon el tiempo de realización, la tasa de éxito y las complicaciones. MÉTODO: Después de la aprobación por parte del Comité de Ética en Investigación del Hospital Governador Celso Ramos, se

  17. 应用BEATIFIT口内修补全瓷牙崩瓷效果分析%Analysis of the effect of BEATIFIT applicated in intraoral repair porcelain of all ceramic dental

    Institute of Scientific and Technical Information of China (English)

    刘慧丽

    2015-01-01

    目的:探讨应用BEATIFIT口内修补全瓷牙崩瓷的应用效果。方法:收治需进行牙修复患者64例,随机分为试验组和对照组,各32例,试验组给予BEATIFIT口内修补全瓷牙崩瓷法治疗,对照组给予常规治疗。结果:试验组治疗效果显著优于对照组(P<0.05)。结论:应用BEATIFIT口内修补全瓷牙崩瓷,不仅恢复了患者原有牙的外形,同时也恢复了原有牙的色泽,临床效果显著。%Objective:To explore the effect of BEATIFIT applicated in intraoral repair porcelain of all ceramic dental.Methods:64 patients who needed dental restoration were selected.They were randomly divided into the experimental group and the control group with 32 cases in each.Patients in the experimental group were given BEATIFIT repair in all ceramic dental porcelain therapy,while patients in the control group were given routine treatment.Results:The treatment effect of the experimental group was significantly better than that of the control group(P<0.05).Conclusion:Application of BEATIFIT in intraoral repair porcelain of all ceramic dental not only can restore the original appearance of dental,but also restore the original color of the teeth,so it has a significant clinical effect.

  18. Rinoplastia do nariz negróide por via intra-oral sem ressecções externas: avaliação da eficácia da técnica

    Directory of Open Access Journals (Sweden)

    Castilho Helton Traber de

    2002-01-01

    Full Text Available OBJETIVO: Avaliar a eficácia da técnica de redução da largura da base nasal do nariz negróide, modificando a inclinação dos eixos das narinas pela mobilização de tecidos internos, por abordagem intra-oral, evitando cicatrizes externas. MÉTODOS: Foram operadas 11 pacientes adulta do sexo feminino, com idade variando entre 19 a 45 anos, distribuindo-se em 2 da raça caucasóide e 9 da raça negróide, sendo desta 5 de cor parda e 4 de cor negra. O método de fotografia foi padronizado, e as imagens em papel foram digitalizadas. Por meio de software foram mensurados nas fotografias pré-operatórias e com 3 meses após a rinoplastia, 8 índices relativos à base nasal baseados em pontos antropométricos. Os valores obtidos foram submetidos à análise estatística descritiva e inferencial. RESULTADOS: Não houve diferença estatisticamente significante em 7 índices relativos a redução da largura da base nasal e à inclinação dos eixos das narinas. Apenas houve alteração significante no aumento do Ângulo Nasolabial (p=0,001. CONCLUSÃO: A técnica de rinoplastia de nariz negróide por via intra-oral sem ressecções externas, apenas com mobilização dos tecidos internos, não é eficaz para a reduzir a largura da base nasal.

  19. Bloqueio isquiático-femoral guiado por ultra-som para revisão de coto de amputação: relato de caso Bloqueo isquiático-femoral guiado por ultrasonido para revisión de muñón de amputación: relato de caso Ultrasound-guided sciatic-femoral block for revision of the amputation stump: case report

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2008-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O emprego da ultra-sonografia na anestesia regional vem se tornando cada vez mais difundido pelo seu papel facilitador e pela sua eficácia. A visualização direta por meio da ultra-sonografia permite que se identifiquem os nervos periféricos, independentemente da capacidade de se obter estimulação sensitiva ou motora. RELATO DO CASO: Paciente submetido à revisão de coto de amputação no nível do joelho sob bloqueio isquiático-femoral guiado por ultra-som com 40 mL de ropivacaína a 0,5%, promovendo bloqueio sensitivo completo e anestesia cirúrgica de excelente qualidade. CONCLUSÕES: A assistência ultra-sonográfica é capaz de ampliar o espectro de utilização dos bloqueios periféricos nas intervenções cirúrgicas sobre membros amputados em situações em que a neuroestimulação não pode ser utilizada.JUSTIFICATIVA Y OBJETIVOS: El uso del ultrasonido en la anestesia regional se ha venido convirtiendo cada vez más en algo muy difundido por su rol de facilitador y por su eficacia. La visualización directa a través del ultrasonido permite que se identifiquen los nervios periféricos, independientemente de la capacidad de poder obtenerse una estimulación sensitiva o motora. RELATO DEL CASO: Paciente sometido a revisión de muñón de amputación al nivel de la rodilla bajo bloqueo isquiático-femoral guiado por ultrasonido con 40 mL de ropivacaína a 0,5%, promoviendo bloqueo sensitivo completo y anestesia quirúrgica de excelente calidad. CONCLUSIONES: La asistencia ultra sonográfica es capaz de ampliar el espectro de utilización de los bloqueos periféricos en las intervenciones quirúrgicas sobre miembros amputados en situaciones en que la neuro estimulación no puede ser utilizada.BACKGROUND AND OBJECTIVES: The use of ultrasound in regional blocks has become increasingly used because its role as a facilitator and its efficacy. Direct ultrasound visualization allows the identification of

  20. Efeitos da clonidina por via muscular e perineural no bloqueio do nervo isquiático com ropivacaína a 0,5% Efectos de la clonidina por vía muscular y perineural en el bloqueo del nervio isquiático con ropivacaína a 0,5% Effects of intramuscular and perineural clonidine on sciatic nerve block with 0.5% ropivacaine

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2005-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Foram estudados os efeitos da clonidina sobre a latência, a qualidade da anestesia e a duração da analgesia do bloqueio do nervo isquiático com ropivacaína a 0,5%. MÉTODO: Quarenta pacientes adultos foram submetidos a cirurgias sobre o pé e/ou a face lateral do tornozelo sob bloqueios combinados de nervos femoral e isquiático, por via anterior, em que foram alocados, segundo números aleatórios em grupo 1: 25 mL de ropivacaína a 0,5% e placebo perineural; grupo 2: 2 µg.kg-1 de clonidina por via muscular e 25 mL de ropivacaína a 0,5% perineural; e grupo 3: 2 µg.kg-1 de clonidina e 25 mL de ropivacaína a 0,5% perineural, injetados após obtidas respostas motoras com correntes de 0,2 e 0,5 mA. A sensibilidade e a motricidade foram avaliadas por 30 minutos após o bloqueio. Um escore de efetividade total do bloqueio foi atribuído. A qualidade da anestesia cirúrgica foi classificada com sucesso ou falha, segundo a necessidade de suplementação sistêmica. A duração foi o tempo desde a realização do bloqueio até a primeira solicitação de analgésico. RESULTADOS: As latências medianas foram 5, 12,5 e 17,5 minutos nos grupos 1 a 3, respectivamente (p = 0,11. As taxas de sucesso foram de 100%, 93% e 75%, respectivamente (p = 0,12. A duração da analgesia pós-operatória foi de 14,5, 13,5, e 13,75 horas, respectivamente (p = 0,15. CONCLUSÕES: A clonidina por via muscular ou perineural não influenciou a latência, a qualidade de anestesia ou a duração da analgesia do bloqueio do nervo isquiático com ropivacaína a 0,5%.JUSTIFICATIVA Y OBJETIVOS: Se estudiaron los efectos de la clonidina sobre la latencia, la calidad de la anestesia y la duración de la analgesia de lo bloqueo del nervio isquiático con ropivacaína a 0,5%. MÉTODO: Cuarenta pacientes adultos fueron sometidos a cirugías sobre el pie y/o la faz lateral del tobillo bajo bloqueos combinados de nervios femoral e isquiático, por v

  1. Avaliação do bloqueio neuromuscular residual e da recurarização tardia na sala de recuperação pós-anestésica Evaluación del bloqueo neuromuscular residual y de la recurarización tardia en la sala de recuperación pós-anestésica Evaluation of residual neuromuscular block and late recurarization in the post-anesthetic care unit

    Directory of Open Access Journals (Sweden)

    Maria Cristina Simões de Almeida

    2004-08-01

    fase de recuperação, quando foi usada a neostigmina não se seguiu de "recurarização", sugerindo que esse fenômeno não tenha significado clínico quando o paciente não apresenta sinais de falência de órgãos ou comorbidades que alteram a transmissão neuromuscular.JUSTIFICATIVA Y OBJETIVOS: El bloqueo neuromuscular residual altera la patencia de las vías aéreas aumentando el riesgo de graves complicaciones en el pós-operatorio. En los pacientes que reciben el anticolinesterásico, la transmisión neuromuscular es incrementada por el acumulo de acetilcolina en la placa motora, más que, una vez concluido el efecto de la neostigmina, teoricamente es posible una "recurarización", visto que el agente antagonista no desloca el bloqueador neuromuscular de su local de acción. Fue objetivo de este trabajo cuantificar el grado de parálisis residual en la Sala de Recuperación Pós-Anestésica (SRPA y averiguar si los pacientes que recibieron neostigmina presentan fenómeno de "recurarización" tardia. MÉTODO: Fueron estudiados en la SRPA 119 pacientes adultos que recibieron bloqueadores neuromusculares para diferentes tipos de procedimientos. Al llegar a la SRPA, la transmisión neuromuscular fue cuantificada a través de un monitor por método acelerográfico. Los electrodos estimuladores fueron instalados en el trayecto del nervio ulnar en el puño, y se utilizó la secuencia de 4 estímulos, con corrientes de 30 mA, en la periodicidad de 15 hasta 120 minutos. En esta pesquisa se consideró como residuo de bloqueo neuromuscular una relación T4/T1 abajo de 0,9. En el tiempo de permanencia de la SRPA fueron igualmente registrados los síntomas clínicos sugestivos de bloqueo neuromuscular residual y aferidos los señales vitales. Para análisis estadística fueron utilizadas medidas descriptivas tales como media y frecuencia absoluta. RESULTADOS: Los pacientes que recibieron pancuronio presentaron mayor incidencia de residuo de bloqueo neuromuscular

  2. Prevalência de paralisia diafragmática após bloqueio de plexo braquial pela via posterior com ropivacaína a 0,2% Prevalencia de parálisis diafragmática después del bloqueo del plexo braquial por la vía posterior con ropivacaína a 0,2% Prevalence of diaphragmatic paralysis after brachial plexus blockade by the posterior approach with 0.2% ropivacaine

    Directory of Open Access Journals (Sweden)

    Marcos Guilherme Cunha Cruvinel

    2006-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo braquial pela via interescalênica descrita por Winnie é uma das técnicas mais eficazes para promover analgesia pós-operatória de intervenções cirúrgicas no ombro. Uma de suas conseqüências é a paralisia diafragmática. Esta paralisia pode levar, em pacientes com algum grau de disfunção pulmonar prévia, à insuficiência respiratória. A abordagem do plexo braquial por via posterior tem conquistado espaço. O objetivo deste estudo foi determinar a prevalência de paralisia diafragmática, após o bloqueio de plexo braquial interescalênico pela via posterior com o uso de ropivacaína a 0,2%. MÉTODO: Vinte e dois pacientes submetidos ao bloqueio do plexo braquial interescalênico pela via posterior com ropivacaína a 0,2%, foram avaliados no pós-operatório com o objetivo de identificar sinais radiológicos de elevação da cúpula diafragmática sugestivos de paralisia hemidiafragmática. Em 20 pacientes utilizou-se 40 mL de ropivacaína a 0,2%, nestes foi realizada radiografia de tórax em inspiração. Em dois foram utilizados 20 mL de ropivacaína a 0,2%, com subseqüente avaliação fluoroscópica. RESULTADOS: Não houve complicações relacionadas à realização do bloqueio. Em todos os pacientes, o bloqueio foi efetivo e proporcionou boa analgesia pós-operatória. Foi observada elevação da cúpula diafragmática compatível com paralisia hemidiafragmática em todos os casos estudados. CONCLUSÕES: Nas condições deste estudo observou-se que o bloqueio do plexo braquial pela via posterior é uma técnica que está associada à alta prevalência de paralisia diafragmática, mesmo utilizando-se baixas concentrações de anestésico local.JUSTIFICATIVA Y OBJETIVOS: El bloqueo de plexo braquial por vía interescalénica descrita por Winnie es una de las técnicas más eficaces para promover la analgesia postoperatoria de intervenciones quirúrgicas en el hombro. Una de sus

  3. Determinación de la eficacia analgésica de los bloqueos del ganglio estrellado en el síndrome doloroso regional complejo con dolor mediado por el sistema nervioso simpático: estudio preliminar Study of the analgesic efficacy of stellate ganglion blockade in the management of the complex regional pain syndrome in patients with pain mediated by sympathetic nervous system: preliminary study

    Directory of Open Access Journals (Sweden)

    R. F. Rodríguez

    2006-05-01

    Full Text Available Objetivo: Este estudio fue realizado con el propósito de determinar la eficacia analgésica de los bloqueos del ganglio estrellado, en el alivio del dolor mediado por el sistema nervioso simpático, en pacientes con síndrome doloroso regional complejo. Pacientes y métodos: Se realizó un ensayo clínico controlado con asignación aleatoria y enmascaramiento simple. Treinta y nueve pacientes fueron tratados con una serie de bloqueos de ganglio estrellado, terapia física y tratamiento farmacológico, mientras que treinta y dos pacientes fueron tratados con fisioterapia y el mismo esquema farmacológico. Para determinar la asociación entre las variables se utilizó el riesgo relativo con sus respectivos intervalos de confianza. Resultados: En la evaluación clínica realizada un mes postratamiento se encontró alivio del dolor en 84,6% de los pacientes del grupo de intervención y en 78,1% de los controles (RR= 1,08; I.C. 95%=0,8-1,4; p=0.48, sin encontrarse diferencias estadísticamente significativas. No se encontró asociación entre la eficacia analgésica y tabaquismo, dominancia, género, tipo de SDRC, causa desencadenante y nivel educativo.Objective: The purpose of this study was to determine the analgesic efficacy of stellate ganglion blockade in pain mediated by the sympathetic nervous system in patients with Complex Regional Pain Syndrome (CRPS. Patients and methods: A randomized, simple-blinded controlled clinical trial was conducted. Thirty nine patients were randomly assigned to an intervention group which was treated with a series of stellate ganglion blockades, physical therapy and pharmacological treatment, and thirty two to a control group which was treated with physical therapy and the same pharmacological treatment. Risk ratio was used to evaluate outcome and determine association with predictor variables. Results: At the end of the first month post treatment, it was found that 84.6% of patients in the intervention group had

  4. 计算机导航辅助下口内入路髁突切除术的临床应用%Clinical application of condylectomy via intraoral approach under computer assisted surgical navigation

    Institute of Scientific and Technical Information of China (English)

    王晓霞; 李自力; 伊彪; 梁成; 田凯月; 王兴

    2013-01-01

    Objective To assess the application of computer assisted surgical navigation in condylectomy via intraoral approach and its clinical results.Methods Eight patients aged from 16 to 56 were treated by condylectomy via intraoral approach under computer assisted surgical navigation.There were 6 famale and 2 male.The lesions were condyle osteoma in 3 patients,hemimandibular hyperplasia and condylar hyperplasia in 5 patients.Most patients had concomitant LeFort Ⅰ osteotomy(6 cases),bilateral sagittal split ramus osteotomy (BSSRO) (5 cases),contralateral sagittal split ramus osteotomy (SSRO) (1 cases),genioplasty (4 cases) and mandible contouring (6 cases) to recover the facial symmetry.Results All patients had good occlusion,oral function and facial symmetry after the operation.The arerage mouth opening was 38 mm before operation,and 41 mm one month after operation.The temporomandibular joint (TMJ) dysfunction syndrome alleviated or disappeared.The follow-up period was 3-12 months,and results were stable.Conclusions Computer assisted surgical navigation can precisely accomplish the condylectomy via intraoral approach.It causes less trauma to the patient than traditional condylectomy,and can better preserve the TMJ structure and function.%目的 探讨计算机导航技术在口内喙突切除入路髁突切除术中的应用.方法 在计算机导航技术辅助下,采用口内喙突切除入路共完成8例患者的髁突病变切除手术治疗,患者年龄16 ~56岁,男性2例,女性6例,其中3例为髁突骨瘤,5例为半侧颌骨肥大畸形伴发的髁突良性肥大.6例同期进行上颌LeFoa Ⅰ型截骨术、5例双侧下颌升支矢状劈开截骨术、1例健侧下颌升支矢状劈开截骨术、4例颏成形术及6例下颌骨体或下颌角修整术,以恢复面部的对称性.结果 经术后CT验证,所有患者均按术前设计方案成功完成了髁突病变切除术,术后咬合关系、面部对称性恢复良好,颞下颌关节疼痛及弹响

  5. Bloqueo del receptor del factor de crecimiento semejante a la Insulina Tipo I utilizando oligodeoxinucleótidos antisentido en cáncer de mama experimental Type I insulin-like growth factor receptor antisense strategies in experimental breast cancer

    Directory of Open Access Journals (Sweden)

    Mariana Salatino

    2004-04-01

    Full Text Available Evaluamos el efecto del bloqueo de la expresión del receptor del factor de crecimiento semejante a la insulina tipo I (IGF-IR sobre el crecimiento in vivo de cáncer de mama empleando una estrategia "antisentido". Utilizamos el adenocarcinoma mamario murino progestágeno-dependiente C4HD. La administración intratumoral o sistémica de oligodeoxinucleótidos antisentido fosfotiolados al ARNm del IGF-IR (AS[S]ODN inhibió el crecimiento tumoral. El efecto antitumoral fue específico debido a su dosis-dependencia y a la falta de efecto en ratones tratados con el S[S]ODN "sentido". Los tumores obtenidos de ratones tratados con AS[S]ODN mostraron: disminución en la expresión de IGF-IR y en la fosforilación del sustrato del receptor de insulina-1, inhibición de la activación de PI-3K/Akt, p42/p44MAPK y ErbB-2, mientras que la expresión y activación del receptor de progesterona no se afectó. Es la primera demostración que el crecimiento de cáncer de mama puede ser inhibido por la administración in vivo de AS[S]ODN al IGF-IR.We addressed the effect of targeting type I insulin-like growth factor receptor (IGF-IR, with antisense strategies in in vivo growth of breast cancer cells. We used C4HD tumors from an experimental model of hormonal carcinogenesis in which medroxyprogesterone acetate induced mammary adenocarcinomas in Balb/c mice. Intratumor or systemic administration of phosphorothiolated antisense oligodeoxynucleotides (AS[S]ODN to IGF-IR mRNA resulted in a significant inhibition of C4HD tumor growth. The antitumor effect was specific since inhibition of tumor growth was dose-dependent and no effect was observed in mice treated with sense S[S]ODN. Tumors from AS[S]ODN-treated mice showed a decrease in IGF-IR expression and in insulin receptor substrate-1 tyrosine phosphorylation. Activation of PI-3K/Akt, p42/p44 MAPK and ErbB-2 was abolished in tumors treated with AS[S]ODN. Progesterone receptor expression or activity remained

  6. Estudo comparativo da eficácia analgésica pós-operatória de 20, 30 ou 40 mL de ropivacaína no bloqueio de plexo braquial pela via posterior Estudio comparativo de la eficacia analgésica postoperatoria de 20, 30 o 40 mL de ropivacaína en el bloqueo de plexo braquial por la vía posterior A comparative study on the postoperative analgesic efficacy of 20, 30, or 40 mL of ropivacaine in posterior brachial plexus block

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    Marcos Guilherme Cunha Cruvinel

    2007-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As intervenções cirúrgicas por via artroscópica no ombro estão relacionadas com a dor pós-operatória de grande intensidade. Dentre as técnicas de analgesia, o bloqueio do plexo braquial é a que oferece os melhores resultados. O objetivo deste estudo foi determinar qual volume de anestésico local no bloqueio de plexo braquial pela via posterior propicia analgesia pós-operatória para essas operações de maneira mais eficiente. MÉTODO: Noventa pacientes submetidos a bloqueio do plexo braquial pela via posterior foram divididos aleatoriamente em três grupos de 30. Grupo 1 - volume de 20 mL; Grupo 2 - volume de 30 mL; e Grupo 3 - volume de 40 mL. Em todos os grupos, o anestésico usado foi a ropivacaína a 0,375%. O bloqueio foi avaliado por meio da pesquisa de sensibilidade térmica utilizando-se algodão embebido em álcool e a dor pós-operatória foi avaliada seguindo-se uma escala numérica verbal (ENV nas primeiras 24 horas. RESULTADOS: Nos três grupos a analgesia pós-operatória foi similar segundo os parâmetros avaliados; ENV de dor média, tempo até a primeira queixa de dor e consumo de opióides no pós-operatório. No grupo de 20 mL houve um maior consumo de analgésicos não-opióides após a 12ª hora de pós-operatório. Nos grupos de 30 e 40 mL a extensão do bloqueio foi muito maior. CONCLUSÕES: Este estudo mostrou que o bloqueio do plexo braquial pela via posterior é uma técnica que promove analgesia eficaz para intervenções cirúrgicas no ombro. Os três diferentes volumes estudados promoveram analgesia similar. A maior extensão do bloqueio com volumes maiores não se traduziu em melhor analgesia.JUSTIFICATIVA Y OBJETIVOS: Las intervenciones quirúrgicas por vía artroscópica en hombro están relacionadas al dolor postoperatorio de gran intensidad. Entre las técnicas de analgesia, el bloqueo del plexo braquial es el que ofrece los mejores resultados. El objetivo de este estudio

  7. Analgesia pós-operatória em cirurgia ortopédica: estudo comparativo entre o bloqueio do plexo lombar por via perivascular inguinal (3 em 1 com ropivacaína e a analgesia subaracnóidea com morfina Analgesia pós-operatoria en cirugía ortopédica: estudio comparativo entre el bloqueo del plexo lombar por vía perivascular inguinal (3 en 1 con ropivacaína y la analgesia subaracnóidea con morfina Postoperative analgesia following orthopedic surgery: a study comparing perivascular lumbar plexus inguinal block with ropivacaine (3 in 1 and spinal anesthesia with morphine

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    Neuber Martins Fonseca

    2003-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio do plexo lombar pelo acesso perivascular inguinal, chamado de bloqueio 3 em 1, tem sido utilizado para analgesia pós-operatória. O objetivo deste estudo foi comparar a analgesia pós-operatória do bloqueio 3 em 1 a da morfina subaracnóidea em pacientes submetidos a cirurgias ortopédicas em membro inferior (MI. MÉTODO: Foram estudados 40 pacientes escalados para cirurgia ortopédica de MI, de ambos os sexos, estado físico ASA I e II, com idades entre 15 e 75 anos, distribuídos em 2 grupos (M e BPL. Foi realizada anestesia subaracnóidea em todos os pacientes, em L3-L4 ou L4-L5, com 20 mg de bupivacaína isobárica a 0,5%. No grupo M (n = 20 foi associado 50 µg de morfina ao anestésico local. No grupo BPL (n = 20 foi realizado o bloqueio 3 em 1 ao término da cirurgia, utilizando 200 mg de ropivacaína a 0,5%. Avaliou-se a analgesia e a intensidade da dor às 4, 8, 12, 14, 16, 20 e 24 horas após o término da cirurgia, o nível do bloqueio subaracnóideo, o tempo cirúrgico e as complicações. RESULTADOS: A duração da analgesia no grupo BPL foi de 13,1 ± 2,47, enquanto no grupo M todos os pacientes referiam dor e ausência de bloqueio motor no primeiro instante avaliado (4 horas. Houve falha do bloqueio de um dos 3 nervos em 3 pacientes. A incidência de náusea e prurido foi significativamente maior no grupo M. Quanto à retenção urinária, não houve diferença significante entre os grupos. Não houve depressão respiratória, hipotensão arterial ou bradicardia. A analgesia pós-operatória foi mais efetiva no grupo BPL, comparada ao grupo M às 4, 8, 12,14 e 16 horas. Às 20 e 24 horas não houve diferença significante entre os grupos. CONCLUSÕES: A analgesia pós-operatória proporcionada pelo bloqueio 3 em 1 apresentou efeitos colaterais inferiores à morfina subaracnóidea com tempo de analgesia semelhante.JUSTIFICATIVA Y OBJETIVOS: El bloqueo del plexo lumbar por el acceso

  8. Dual renin-angiotensin system blockade plus oral methylprednisone for the treatment of proteinuria in IgA nephropathy Doble bloqueo del sistema renina-angiotensina más metilprednisona oral para el tratamiento de la proteinuria en la nefropatía por IgA

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    Hernán Trimarchi

    2007-10-01

    Full Text Available Renin-angiotensin system inhibition is a widely accepted approach to initially deal with proteinuria in IgA nephropathy, while the role of immunosuppressants remains controversial in many instances. A prospective, uncontrolled, open-label trial was undertaken in patients with biopsy-proven IgA nephropathy with proteinuria > 0.5 g/day and normal renal function to assess the efficacy of a combination treatment of angiotensin converting enzyme inhibitors plus angiotensin receptor blockers enalapril valsartan coupled with methylprednisone to decrease proteinuria to levels below 0.5 g/day. Twenty patients were included: Age 37.45 ± 13.26 years (50% male; 7 patients (35% were hypertensive; proteinuria 2.2 ± 1.86 g/day; serum creatinine 1.07 ± 0.29 mg/dl; mean follow-up 60.10 ± 31.47 months. IgA nephropathy was subclassified according to Haas criteria. Twelve patients (60% were class II; seven (35% were class III and one (5% class V. All patients received dual reninangiotensin system blockade as tolerated. Oral methylprednisone was started at 0.5 mg/kg/day for the initial 8 weeks and subsequently tapered bi-weekly until the maintenance dose of 4 mg was reached. Oral steroids were discontinued after 24 weeks (6 months of therapy but renin-angiotensin inhibition remained unchanged. At 10 weeks of therapy proteinuria decreased to 0.15 ± 0.07 g/day (P El doble bloqueo del sistema renina-angiotensina con inhibidores de la enzima convertidora de angiotensina junto a bloqueadores del receptor tipo I de angiotensina II es aceptado como tratamiento en la proteinuria de la nefropatía por IgA, ya que el rol de los inmunosupresores continúa siendo controvertido. Estudio prospectivo, no controlado, abierto para pacientes con nefropatía por IgA con proteinurias >0.5 g/día y creatininas séricas <1.4 mg/dl, para evaluar la eficacia de tratamiento de enalapril más valsartán asociado a metilprednisona vía oral para disminuir las proteinurias a <0.5 g

  9. Influência do sevoflurano e do isoflurano na recuperação do bloqueio neuromuscular produzido pelo cisatracúrio Influencia del sevoflurano y del isoflurano en la recuperación del bloqueo neuromuscular producido por el cisatracúrio The influence of sevoflurane and isoflurane on the recovery from cisatracurium-induced neuromuscular block

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    Angélica de Fátima de Assunção Braga

    2002-09-01

    recuperação houve diferença significante entre o grupo I e os demais grupos. CONCLUSÕES: A recuperação do bloqueio neuromuscular produzido pelo cisatracúrio foi mais lenta durante a anestesia com os agentes voláteis do que com o propofol, sendo o efeito mais pronunciado com o sevoflurano.JUSTIFICATIVA Y OBJETIVOS: Los efectos de los agentes bloqueadores neuromusculares sobre la juntura neuromuscular son aumentados por los anestésicos volátiles. El objetivo de este estudio fue evaluar la influencia del sevoflurano y del isoflurano en la recuperación del bloqueo neuromuscular producido por el cisatracúrio. MÉTODO: Fueron estudiados 90 pacientes, estado físico ASA I y II, sometidos a cirugías electivas bajo anestesia general, distribuidos en tres grupos: Grupo I (sevoflurano, Grupo II (isoflurano y Grupo III (propofol. Todos los pacientes recibieron como medicación pré-anestésica, midazolan (0,1 mg.kg-1 por vía muscular, 30 minutos antes de la cirugía. La inducción anestésica fue obtenida con alfentanil (50 µg.kg-1, propofol (2,5 mg.kg-1 y cisatracúrio (0,15 mg.kg-1. Los pacientes fueron ventilados con oxígeno a 100% bajo máscara hasta la desaparición de las cuatro respuestas a SQE, cuando fueron realizadas las maniobras de laringoscopia e intubación traqueal. Los agente volátiles para la manutención de la anestesia fueron introducidos luego después de la intubación traqueal y empleados en las concentraciones de 2% y 1%, respectivamente para el sevoflurano e isoflurano, y el propofol en infusión continuada (7 a 10 mg.kg-1.h-1. En todos los pacientes se empleó la mezcla de oxígeno y óxido nitroso a 50%. La función neuromuscular fue monitorizada por aceleromiografia del músculo aductor del pulgar, empleándose la SQE a cada 15 segundos. Fueron evaluados: la duración clínica del bloqueo neuromuscular (T1(25% y el índice de recuperación (IR= T1(25-75%. RESULTADOS: Los tiempos medios y desvíos patrón para la duración clínica (T1(25% e

  10. Parche de lidocaína al 5% para el tratamiento del SDRC de extremidad superior por bloqueo transcutáneo del plexo braquial: Caso Clínico Licodocaíne patch for the treatment of CRPS in the arm by transcutaneous block of the brachial plexus: Clinical case

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    M. A. Vidal

    2007-06-01

    Full Text Available El síndrome de dolor regional complejo (SDRC se manifiestan con una clínica variada que se caracteriza por dolor, impotencia funcional, trastornos vaso-sudomotores y alteraciones tróficas. Está causado por una lesión primaria o una disfunción del Sistema Nervioso Periférico, estableciéndose dos grupos: SDRC-I que sustituye al término DSR y el SDRCII en lugar del término causalgia. Caso clínico: Varón de 37 años de edad, que tras ser sometido a una artroscopia de hombro comenzó a presentar dolor en el hombro y limitación funcional importante, así como ciertos cambios vasomotores de la misma extremidad, por lo que se diagnosticó de SDRC. El paciente siguió varias pautas de tratamiento analgésico por vía oral, fue sometido a numerosas infiltraciones intraarticulares, se realizaron bloqueos del ganglio estrellado e inició tratamiento rehabilitador. Durante estos meses la evolución clínica del paciente fue tórpida, reapareciendo el dolor en todas las ocasiones y sin presentar mejoría de la movilidad. Se decidió iniciar tratamiento con parches de lidocaína al 5%, con lo que se consiguió controlar el dolor del paciente y finalizó la rehabilitación con recuperación completa. El parche de lidocaína al 5% es un analgésico tópico desarrollado para el tratamiento del dolor neuropático de origen periférico. Está aprobado en EEUU para el tratamiento de la neuralgia postherpética. Sin embargo, se está probando su utilización en otras formas de dolor neuropático, como la neuropatía diabética, el dolor crónico de espalda y el dolor miofascial. El SDRC está asociado con una actividad anormal del sistema nervioso simpático, por lo que el bloqueo simpático mediante anestésicos locales es ampliamente utilizado. En el caso concreto de los parches de lidocaína al 5% se ha publicado un caso de tratamiento de forma efectiva. Este caso es similar al que nosotros describimos, que también fue refractario al tratamiento

  11. Comparação entre raquianestesia, bloqueio combinado raqui-peridural e raquianestesia contínua para cirurgias de quadril em pacientes idosos: estudo retrospectivo Comparación entre raquianestesia, bloqueo combinado raqui-peridural y raquianestesia continua para cirugías de cuadril en pacientes ancianos: estudio retrospectivo Comparison between spinal, combined spinal-epidural and continuous spinal anesthesias for hip surgeries in elderly patients: a retrospective study

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    Luiz Eduardo Imbelloni

    2002-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Diversas questões envolvem os estudos, as análises e o tamanho da amostra para que sejam demonstrados os benefícios da anestesia regional. Análise de dados geralmente custa menos e requer menos tempo quando comparado com amplo estudo aleatório controlado. Esta análise retrospectiva compara a raquianestesia contínua, o bloqueio combinado raqui-peridural e a raquianestesia simples para cirurgias de quadril em pacientes idosos durante quatro anos, para determinar as possíveis vantagens e desvantagens das três técnicas. MÉTODO: Foram avaliados 300 prontuários sendo que: 100 pacientes receberam raquianestesia simples (Grupo 1, 100 receberam bloqueio combinado raqui-peridural (Grupo 2 e 100 receberam raquianestesia contínua (Grupo 3 nos últimos quatro anos. Todos os bloqueios foram realizados em decúbito lateral esquerdo. Foram avaliados: sucesso de punção, nível da analgesia, bloqueio motor de membros inferiores, qualidade da anestesia, necessidade de complementação, incidência de falhas, parestesias, cefaléia pós-punção, alterações cardiovasculares, confusão mental e delírio, transfusão sangüínea e mortalidade. RESULTADOS: Não existiu diferença significativa entre os grupos em relação a idade, peso e sexo. Os pacientes do grupo 2 foram menores do que os do grupo 1 e 3. As doses utilizadas foram de 15,30 mg de bupivacaína no grupo 1; 23,68 mg no grupo 2 e 10,10 mg no grupo 3. Não foi encontrada diferença significativa (p JUSTIFICATIVA Y OBJETIVOS: Diversas cuestiones envuelven los estudios, las análisis y el tamaño de la muestra para que sean demostrados los beneficios de la anestesia regional. Las análisis de datos generalmente cuestan menos y requieren menos tiempo, cuando comparado con un amplio estudio aleatorio controlado. Esta análisis retrospectiva compara la raquianestesia continua, el bloqueo combinado raqui-peridural y la raquianestesia simple para cirugías de cuadril en

  12. A dexmedetomidina para sedação, por via venosa, não interfere com a duração dos bloqueios sensitivo e motor da raquianestesia La dexmedetomidina para sedación, por vía venosa, no interfiere con la duración del bloqueo sensitivo y motor de la raquianestesia Intravenous dexmedetomidine for sedation does not interfere with sensory and motor block duration during spinal anesthesia

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    Edno Magalhães

    2006-02-01

    ansiedad, necesitando en ese caso sedación. Los benzodiazepínicos, opioides y propofol son ampliamente utilizados para este propósito. Los agonistas alfa 2-adrenérgicos tienen propiedades hipnóticas y sedativas y son una alternativa terapéutica por la estabilidad hemodinámica y mínima depresión respiratoria. El objetivo de este estudio es evaluar la seguridad e interacciones de dexmedetomidina y midazolam por vía intravenosa en la duración del bloqueo sensitivo y motor de la raquianestesia. MÉTODO: Fueron estudiadas 35 pacientes adultas, estado físico ASA I y II, que recibieron raquianestesia con bupivacaína a 0,5% hiperbárica (15 mg, para cirugía ginecológica electiva, distribuidas de modo aleatorio en 2 grupos: grupo M (n = 17 - sedación con midazolam en infusión continua a 0,25 µg.kg-1.min-1 y grupo D (n = 18 - sedación con dexmedetomidina en infusión continua a 0,5 µg.kg-1.min-1. La velocidad de infusión fue ajustada para mantener el valor del BIS entre 60 y 80. Fueron analizados los valores de PAS, PAD, FC, SpO2, BIS, extensión y duración del bloqueo sensitivo motor (escala de Bromage. RESULTADOS: No hubo diferencia estadística entre los grupos en edad, peso, nivel de bloqueo sensitivo y duración bloqueo sensitivo motor, como de la frecuencia cardíaca y presión arterial. CONCLUSIONES: La dexmedetomidina utilizada en sedación, por vía venosa, no alteró los parámetros hemodinámicos, duración o extensión de los bloqueos sensitivo y motor de la raquianestesia, representando una buena opción para sedación durante anestesia regional.BACKGROUND AND OBJECTIVES: The association among local and regional anesthesia is a very useful and common practice. However, some patients may become anxious and require sedation. Benzodiazepines, opioids and propofol are widely used for this aim. Alpha2-adrenergic agonists have hypnotic and sedative properties and represent an alternative to promote hemodynamic stability and minor respiratory depression

  13. Estudo comparativo entre clonidina associada à bupivacaína e bupivacaína isolada em bloqueio de plexo cervical para endarterectomia de carótida Estudio comparativo entre la clonidina asociada a la bupivacaína y la bupivacaína aislada en bloqueo de plexo cervical para endarterectomía de carótida A comparative study between bupivacaine and clonidine associated with bupivacaine in cervical plexus block for carotid endarterectomy

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    Walter Pinto Neto

    2009-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo cervical permite avaliação neurológica durante a endarterctomia, além de manter analgesia pós-operatória. A clonidina é agonista alfa2 com efeito analgésico em diferentes bloqueios. O objetivo deste estudo foi comparar o efeito analgésico da clonidina com bupivacaína em relação à bupivacaína isolada em bloqueio de plexo cervical. MÉTODO: Foram avaliados 30 pacientes de forma aleatória e duplamente-encoberta divididos em dois grupos: G1 recebeu 1,5 mg.kg-1 de bupivacaína a 0,375% associados a 150 ¼g de clonidina (2 mL e G2, 1,5 mg.kg-1 de bupivacaína a 0,375% associados à solução fisiológica (2 mL. Foram avaliados: frequência cardíaca e pressão arterial nos momentos 0 (bloqueio, 30, 60, 90 e 120 minutos; necessidade de complementação anestésica; momento para primeira complementação analgésica; quantidade de analgésico usada e intensidade da dor nos momentos 0 (término da operação, 30, 60, 120, 240 e 360 minutos. RESULTADOS: A complementação anestésica com lidocaína foi de 3,8 mL no G1 e 3,6 mL no G2 sem diferença estatística significativa. O momento para a primeira complementação foi de 302,6 ± 152,6 minutos no G1, e de 236,6 ± 132,9 minutos no G2, sem diferença significativa. Não houve diferença na dose de dipirona e tramadol usada. Não houve diferença na intensidade da dor entre os grupos. CONCLUSÃO: A associação de 150 ¼g de clonidina à bupivacaína em bloqueio de plexo cervical para endarterectomia de carótida não promoveu melhora significativa do efeito analgésico avaliado por intensidade da dor, primeira complementação analgésica e quantidade de analgésico complementar.JUSTIFICATIVA Y OBJETIVOS: El bloqueo de plexo cervical permite la evaluación neurológica durante la endarterectomía, además de mantener la analgesia postoperatoria. La clonidina es agonista alfa-2 con un efecto analgésico en diferentes bloqueos. El objetivo de

  14. Efeito da administração do atracúrio sobre a recuperação do bloqueio neuromuscular induzido pelo pancurônio Efecto de la administración del atracúrio sobre la recuperación del bloqueo neuromuscular inducido por el pancuronio Effect of atracurium on pancuronium-induced neuromuscular block recovery

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    Luís Fernando Rodrigues Maria

    2004-06-01

    diminuição de 20% no tempo de recuperação total.JUSTIFICATIVA Y OBJETIVOS: Frecuentemente en cirugías abdominales, en la fase de cerramiento de la pared, hay necesidad de dosis adicionales de bloqueador neuromuscular. El objetivo de este estudio fue analizar, en la vigencia de recuperación parcial del bloqueo neuromuscular inducido por el pancuronio, el efecto de la administración de dosis complementares de atracúrio sobre la recuperación espontanea del bloqueo neuromuscular. MÉTODO: Fueron estudiados 30 pacientes, divididos en dos grupos, 14 pacientes formaron el grupo pancuronio y 16 pacientes, el grupo atracúrio. La función neuromuscular fue monitorizada de forma continua por acelerometria del músculo aductor del pulgar, utilizando la secuencia de cuatro estímulos (SQE, a través de la estimulación supramáxima del nervio ulnar. La inducción de la anestesia fue hecha con propofol, fentanil, pancuronio 0,08 mg.kg-1 y la manutención con N2O 60% en oxígeno e isoflurano en la concentración expirada de 0,5%. Cuando la primera contracción de la secuencia de cuatro estímulos (T1 recuperó 25%, el grupo pancuronio recibió pancuronio 0,025 mg.kg-1 y el grupo atracúrio, 0,20 mg.kg-1 de atracúrio. Después de la dosis complementar fueron anotados los tiempos para recuperación espontanea de T1 igual a 10%, 25%, 75%, del índice de recuperación (IR25-75% y de la relación T4/T1 igual a 0,8. RESULTADOS: Los tiempos de recuperación espontanea después de la dosis complementar de pancuronio o atracúrio no divergieron cuando evaluados por la recuperación de T1 en 10% (45,00 ± 15,50 vs 49,69 ± 9,41, 25% (61,64 ± 18,58 vs 64,25 ± 12,51 y 75% (94,00 ± 28,52 vs 84,69 ± 16,50. El IR25-75% (32,36 ± 13,76 vs 20,44 ± 9,24 y el tiempo de recuperación de la relación T4/T1 = 0,8 (176,86 ± 29,57 vs 141,50 ± 29,57 fueron mayores en el grupo en que la complementación fue realizada con pancuronio. CONCLUSIONES: En las condiciones de este estudio, la

  15. Comparação das técnicas transarterial e de estimulação de múltiplos nervos para bloqueio do plexo braquial por via axilar usando lidocaína com epinefrina Comparación de las técnicas transarterial y de estimulación de múltiples nervios para bloqueo del plexo braquial por vía axilar usando lidocaína con epinefrina Comparison of transarterial and multiple nerve stimulation techniques for axillary block using lidocaine with epinephrine

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    Luiz Eduardo Imbelloni

    2005-02-01

    resulta en alta efectividad para el bloqueo axilar del plexo braquial. La técnica de utilizar múltiples estímulos exige más tiempo y mayor experiencia. Este estudio prospectivo compara la latencia y el índice de éxito del bloqueo del plexo braquial usando dos técnicas de localización: transarterial o múltipla estimulación de los nervios. MÉTODO: La lidocaína con epinefrina, 800 mg, fue usada inicialmente para el bloqueo axilar. En el grupo transarterial, 30 mL de lidocaína a 1,6% con epinefrina fueron inyectados profundamente y 20 mL superficialmente a la arteria axilar. En el grupo de múltipla estimulación, tres nervios fueron localizados eléctricamente y bloqueados con volúmenes 20 mL, 20 mL y 10 mL de la solución. El bloqueo fue considerado efectivo cuando la analgesia estaba presente en todos los nervios en la área distal al codo. RESULTADOS: El tiempo de latencia (8,8 ± 2,3 min versus 10,2 ± 2,4 min; p-valor = 0,010 fue significativamente menor en el grupo transarterial. Bloqueos sensitivos completos en los cuatro nervios (mediano, ulnar, radial y musculocutáneo fueron logrados en un 92,5% versus 83,3% en el grupo de múltipla estimulación y acceso transarterial, respectivamente sin diferencia significativa (p-valor = 0,68. El nervio musculocutáneo fue significativamente más fácil de bloquear con el estimulador de nervio periférico (p = 0,034. CONCLUSIONES: La técnica de múltipla estimulación para el bloqueo axilar usando estimulador de nervios (3 inyecciones y la técnica transarterial (2 inyecciones producen resultados semejantes en la calidad del bloqueo. El nervio musculocutáneo es más facilmente bloqueado con el uso del estimulador del nervio periférico. La técnica de múltipla estimulación necesitó menor suplementación del bloqueo y aumentó el tiempo para el inicio de la cirugía.BACKGROUND AND OBJECTIVES: High-dose transarterial technique results in highly effective axillary block. The multiple nerve stimulation technique

  16. Bloqueio do plexo lombar pela via posterior para analgesia pós-operatória em artroplastia total do quadril: estudo comparativo entre Bupivacaína a 0,5% com Epinefrina e Ropivacaína a 0,5% Bloqueo del plexo lumbar por la vía posterior para analgesia postoperatoria en artroplastia total de la cadera: estudio comparativo entre Bupivacaína a 0,5% con Epinefrina y Ropivacaína a 0,5% Posterior lumbar plexus block in postoperative analgesia for total hip arthroplasty: a comparative study between 0.5% Bupivacaine with Epinephrine and 0.5% Ropivacaine

    Directory of Open Access Journals (Sweden)

    Leonardo Teixeira Domingues Duarte

    2009-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio do plexo lombar pela via posterior promove analgesia pós-operatória efetiva na artroplastia total do quadril. Ropivacaína e bupivacaína não apresentaram qualquer diferença na eficácia analgésica em diferentes bloqueios de nervos periféricos. O objetivo deste estudo foi comparar a eficácia da analgesia pós-operatória resultante da administração em dose única da bupivacaína a 0,5% ou da ropivacaína a 0,5% no bloqueio do plexo lombar pela via posterior na artroplastia total do quadril. MÉTODO: Trinta e sete pacientes foram alocados aleatoriamente em dois grupos, segundo o anestésico local utilizado no bloqueio: Grupo B - bupivacaína a 0,5% com epinefrina 1:200.000 ou Grupo R - ropivacaína a 0,5%. Durante o período pós-operatório, os escores de dor e o consumo de morfina na analgesia controlada pelo paciente foram comparados entre os grupos. O sangramento durante a operação e a incidência de efeitos adversos e de complicações também foram comparados. RESULTADOS: Apesar dos escores de dor terem sido menores no Grupo R 8, 12 e 24 horas após o bloqueio, essas diferenças não foram clinicamente significativas. Regressão linear múltipla não identificou o anestésico local como variável independente. Não houve diferença no consumo de morfina, no sangramento intraoperatório e na incidência de complicações e efeitos adversos entre os dois grupos. CONCLUSÕES: A bupivacaína a 0,5% e a ropivacaína a 0,5% produziram alívio eficaz e prolongado da dor pós-operatória após artroplastia total do quadril, sem diferença clínica, quando doses equivalentes foram administradas no bloqueio do plexo lombar pela via posterior.JUSTIFICATIVA Y OBJETIVOS: El bloqueo del plexo lumbar por la vía posterior, genera una analgesia postoperatoria efectiva en la artroplastia total de la cadera. La ropivacaína y la bupivacaína no arrojaron ninguna diferencia en la eficacia analgésica en

  17. Bases anatômicas para o bloqueio anestésico do plexo braquial por via infraclavicular Bases anatómicas para el bloqueo anestésico del plexo braquial por vía infraclavicular Anatomical basis for infraclavicular brachial plexus block

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    Luiz Carlos Buarque de Gusmão

    2002-06-01

    bloqueo anestésico del plexo braquial por via infraclavicular. Con la idea de solucionar el punto donde los fascículos del plexo braquial pueden ser localizados en el interior de la fosa, propusimos medidas a partir de la face anterior de la clavícula y del ángulo formado por el encuentro del músculo deltóide con la clavícula (ángulo deltoclavicular. La primera medida permite localizar en profundidad el local donde pasa el plexo braquial. Ya la segunda, determina la proyección de los fascículos dentro de la fosa, lo que corresponde al punto de entrada de la aguja en la superficie cutánea. MÉTODO: Fueron efectuadas medidas entre la face anterior de la clavícula y los fascículos del plexo braquial, y del ángulo deltoclavicular hasta la proyección superficial de los fascículos. Con base en los encuentros anatómicos fue propuesta una técnica de abordaje del plexo braquial por via infraclavicular. RESULTADOS: Fueron analizadas 100 regiones infraclaviculares de cadáveres fijados. La fosa infraclavicular fue detectada en 96 casos. En ésas, los fascículos del plexo braquial se localizan totalmente o parcialmente en 97,9%. La medida comparada entre la face anterior de la clavícula y los fascículos del plexo, fue de 2,49 cm y del ángulo deltoclavicular hasta la proyección superficial de los fascículos estaba en 2,21 cm. CONCLUSIONES: Los datos obtenidos permiten la determinación exacta del punto de introducción de la aguja, la cual, dirigida perpendicular a la piel, alcanza el plexo braquial sin peligro de provocar pneumotórax o lesión vascular, posibilitando una mayor seguridad a los anestesiologistas, y permitiendo la vuelta de la práctica del bloqueo del plexo abajo de la clavícula.BACKGROUND AND OBJECTIVES: This study shows the constant infraclavicular fossa presence, aiming at using it as a pathway for infraclavicular brachial plexus block. Determining the point where brachial plexus fascicles may be located within the fossa, the authors have

  18. A 2-years follow up study on intraoral resin repair of veneering porcelain chipping of zirconia restorations%氧化锆修复体崩瓷后复合树脂口内修补的2年随访研究

    Institute of Scientific and Technical Information of China (English)

    张丽萍; 王辰

    2015-01-01

    Objective To evaluate the clinical effect of intraoral resin repair of veneering porcelain chipping of zirconia restorations. Methods Fifty-three patients(53 zirconia restorations)with veneering porcelain chipping were received bonding surface priming with 10-MDP containing primer Clearfil Ceramic Primer,followed by intraoral composite resin repair.A 6-24 months followed up study was adopted. Results During the follow up,49 cases acquired the satisfactory clinical results without composite resin loose,loss or discoloration.The success rate was 92.4%. Conclusion On the premise of choosing appropriate indications,the intraoral composite resin repair of chipped zirconia restorations after 10-MDP containing primer treatment is an ideal method and it is worthy to be popularized.%目的:探讨氧化锆修复体崩瓷后复合树脂修补的临床效果.方法:对53例崩瓷氧化锆修复体利用含有功能性粘结单体10-MDP的陶瓷偶联剂Clearfil Ceramic Primer联合复合树脂对崩瓷修复体进行口内直接修补,随访观察6~24个月.结果:49例崩瓷修复体复合树脂修补后2年内未发生树脂松动脱落或变色,成功率为92.4%.结论:在严格选择适应证的前提下,利用含10-MDP的偶联剂处理崩瓷界面后,复合树脂修补崩瓷氧化锆修复体可取得良好的临床效果并值得推广.

  19. Simulação de bloqueios periféricos guiados por ultra-som: curva de aprendizado dos residentes de anestesiologia do CET-SMA/HSL Simulacro de bloqueos periféricos guiados por ultrasonido: curva de aprendizaje de los residentes de anestesiología del CET-SMA/HSL Simulation of ultrasound-guided peripheral nerve block: learning curve of CET-SMA/HSL anesthesiology residents

    Directory of Open Access Journals (Sweden)

    Marilia Bonifácio Baranauskas

    2008-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A técnica de ultra-som tem sido cada vez mais utilizada para a realização de bloqueios de nervos periféricos. Existem poucos relatos na literatura que analisam a curva de aprendizado da técnica de ultra-som. O objetivo do estudo foi avaliar a curva de aprendizado dos residentes de Anestesiologia do CET-SMA/HSL em bloqueios periféricos guiados por ultra-som por meio de modelo experimental de gelatina. MÉTODO: Foi desenvolvido modelo experimental com cuba preenchida de gelatina e azeitona submersa. Nove residentes foram distribuídos aleatoriamente em três grupos (G1, G2 e G3 compostos, cada um, de um R1, um R2 e um R3. Os três grupos receberam explanação teórica. O G1 recebeu duas horas de treinamento prático, o G2 uma hora e o G3 não treinou. Na seqüência, os participantes foram solicitados a posicionar a agulha no ponto médio da parede da azeitona, próximo ao transdutor e reposicionar a agulha entre a azeitona e o fundo da cuba, simulando a injeção perineural do anestésico. Foram avaliadas a velocidade e eficácia das tarefas, além das falhas técnicas. RESULTADOS: O G1 apresentou média de tempo para realização das tarefas de 37,63 segundos, sem falhas técnicas; no G2 observou-se média de 64,40 segundos, ocorrendo duas falhas técnicas e o G3 apresentou média de 93,83 segundos, com 12 falhas técnicas. CONCLUSÕES: O estudo permite concluir que o maior tempo de treinamento em modelo experimental de bloqueios periféricos guiados por ultra-som melhorou a curva de aprendizado na simulação da técnica.JUSTIFICATIVA Y OBJETIVOS: La técnica de ultrasonido ha sido cada vez más utilizada para la realización de bloqueos de nervios periféricos. Existen pocos relatos en la literatura que analizan la curva de aprendizaje de la técnica de ultrasonido. El objetivo del estudio fue evaluar la curva de aprendizaje de los residentes de Anestesiología del CET-SMA/HSL en bloqueos periféricos guiados

  20. Influência da procainamida sobre o bloqueio neuromuscular produzido pelo rocurônio e investigação sobre o mecanismo de ação da procainamida na junção neuromuscular Influencia de la procainamida sobre el bloqueo neuromuscular producido por el rocuronio e investigación sobre el mecanismo de acción de la procainamida en la junción neuromuscular Influence of procainamide on the neuromuscular blockade caused by rocuronium and investigation on the mechanism of action of procainamide on the neuromuscular junction

    Directory of Open Access Journals (Sweden)

    Thalita Duque Martins

    2007-02-01

    el bloqueo neuromuscular producido por la d-tubocurarina ya está comprobada, pero sin embargo el mecanismo es controvertido. El objetivo del estudio fue el de evaluar la influencia de la procainamida en el bloqueo neuromuscular producido por el rocuronio e investigar los mecanismos de esa interacción. MÉTODO: Se utilizaron 15 ratones (250 a 300 g en preparación descrita por Bülbring. Se formaron los siguientes grupos (n = 5 cada: procainamida - 20 µg.mL-1 (Grupo I; rocuronio - 4 µg.mL-1 (Grupo II y rocuronio - 4µg.mL-1 y procainamida - 20µg.mL-1 (Grupo III. Se evaluó: 1 la amplitud de las contracciones musculares bajo la estimulación indirecta en cada grupo, antes y después de la adición de los fármacos; 2 los potenciales de placa terminal en miniatura (PPTM; 3 la eficacia de la 4-aminopiridina en la reversión del bloqueo neuromuscular. El mecanismo de la interacción se estudió en Biventer cervicis (n = 5 y diafragma de ratón desnervado (n = 5, observándose la influencia de la procainamida en la respuesta a la acetilcolina antes y después de la adición de la procainamida. RESULTADOS: De forma aislada, la procainamida no alteró las respuestas neuromusculares. El bloqueo producido con el Grupo III fue de 68,6% ± 7,1%, con una diferencia significativa (p = 0,0067 con relación al Grupo II (10,4% ± 4,5%, revertido por la 4-aminopiridina. La procainamida ocasionó un aumento en la frecuencia de los PPTM, seguido de bloqueo revertido por la 4-aminopiridina. En Biventer cervicis, la procainamida aumentó la respuesta a la acción de contracción de la acetilcolina, resultado no observado con el diafragma desnervado. CONCLUSIONES: La procainamida potenció el bloqueo producido por el rocuronio. Las alteraciones observadas con PPTM y Biventer cervicis identificaron una acción presináptica. El antagonismo de la 4-aminopiridina sobre el bloqueo de los PPTMs sugirió la desensibilización de los receptores por la procainamida.BACKGROUND AND OBJECTIVES

  1. Estudo comparativo da eficácia analgésica pós-operatória de 20 mL de ropivacaína a 0,5, 0,75 ou 1% no bloqueio de plexo braquial pela via posterior Estudio comparativo de la eficacia analgésica postoperatoria de 20 mL de ropivacaina a 0,5, 0,75 ó 1% en el bloqueo de plexo braquial por la vía posterior Comparative study for the postoperative analgesic efficacy of 20 mL at 0.5, 0.75, and 1% ropivacaine in posterior brachial plexus block

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    Marcos Guilherme Cunha Cruvinel

    2008-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As intervenções cirúrgicas por via artroscópica no ombro estão relacionadas com a dor pós-operatória de grande intensidade. Dentre as técnicas de analgesia, o bloqueio do plexo braquial é a que oferece os melhores resultados. O objetivo deste estudo foi determinar qual concentração de anestésico local no bloqueio de plexo braquial pela via posterior propicia analgesia pós-operatória mais prolongada para essas operações. MÉTODO: Noventa pacientes submetidos ao bloqueio do plexo braquial pela via posterior foram divididos aleatoriamente em três grupos de 30. Grupo 1: 20 mL de ropivacaína a 0,5%; Grupo 2: 20 mL de ropivacaína a 0,75%; Grupo 3: 20 mL de ropivacaína a 1%. O bloqueio foi avaliado por meio da pesquisa de sensibilidade térmica utilizando-se algodão embebido em álcool e a dor pós-operatória foi avaliada seguindo-se uma escala numérica verbal (ENV nas primeiras 48 horas. RESULTADOS: Nos três grupos a analgesia pós-operatória foi similar segundo os parâmetros avaliados; ENV de dor média, tempo até a primeira queixa de dor e consumo de opióides no pós-operatório. CONCLUSÕES: Este estudo mostrou que o bloqueio do plexo braquial pela via posterior é uma técnica que promove analgesia eficaz para intervenções cirúrgicas no ombro. Utilizando-se 20mL de ropivacaína, as três diferentes concentrações estudadas promovem analgesia similar.JUSTIFICATIVA Y OBJETIVOS: Las intervenciones quirúrgicas por vía artroscópica en el hombro se relacionan con el dolor postoperatorio de gran intensidad. Entre las técnicas de analgesia, el bloqueo del plexo braquial es la que ofrece los mejores resultados. El objetivo de este estudio fue determinar cuál concentración de anestésico local en el bloqueo de plexo braquial por la vía posterior, propicia analgesia postoperatoria más prolongada para esas operaciones. MÉTODO: Noventa pacientes sometidos al bloqueo del plexo braquial por la v

  2. Uso do bloqueio combinado raqui-peridural durante cirurgia de cólon em paciente de alto risco: relato de caso Uso del bloqueo combinado raquiepidural durante cirugía de colon en paciente de alto riesgo: relato de caso Combined spinal epidural anesthesia during colon surgery in a high-risk patient: case report

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    Luiz Eduardo Imbelloni

    2009-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio combinado raqui-peridural (BCRP oferece vantagens sobre a anestesia peridural ou subaracnóidea com injeção única. O objetivo deste relato foi apresentar um caso onde a anestesia subaracnóidea segmentar pode ser técnica efetiva para intervenção cirúrgica gastrintestinal com respiração espontânea. RELATO DO CASO: Paciente estado físico ASA III, diabetes mellitus tipo II, com hipertensão arterial sistêmica e doença pulmonar obstrutiva crônica, foi escalada para ressecção de tumor de cólon direito. O BCRP foi realizado no interespaço T5 - T6 e foram injetados 8 mg de bupivacaína a 0,5% isobárica acrescida de 50 µg de morfina no espaço subaracnóideo. O cateter peridural (20G foi introduzido quatro centímetros em direção cefálica. Foi obtida sedação com doses fracionadas de 1 mg de midazolam (total de 6 mg. Bupivacaína a 0,5% foi administrada em bolus de 25 mg através do cateter duas horas após a anestesia subaracnóidea. Não houve necessidade de vasopressor nem atropina. CONCLUSÕES: Este caso proporciona evidências de que a raquianestesia segmentar pode ser uma técnica anestésica para operação gastrintestinal com respiração espontânea.JUSTIFICATIVA Y OBJETIVOS: El bloqueo combinado raquiepidural (BCRE, tiene ventajas sobre la anestesia epidural o subaracnoidea con inyección única. El objetivo de este relato, fue presentar un caso donde la anestesia subaracnoidea segmentaria, puede ser una técnica efectiva para la intervención quirúrgica gastrointestinal con respiración espontánea. RELATO DEL CASO: Paciente estado físico ASA III, diabetes mellitus tipo II, con hipertensión arterial sistémica y enfermedad pulmonar obstructiva crónica, que fue indicada para la resección del tumor de colon derecho. El BCRE se realizó en el interespacio T5 - T6, y se inyectaron 8 mg de bupivacaína a 0,5% isobárica con 50 µg más de morfina en el espacio subaracnoideo. El cat

  3. Influência do propofol e do etomidato no bloqueio neuromuscular produzido pelo rocurônio: avaliação pela aceleromiografia Influencia del propofol y del etomidato en el bloqueo neuromuscular producido por el rocuronio: evaluación por la aceleromiografia Influence of propofol and etomidate on rocuronium-induced euromuscular block: evaluation with acceleromyography

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    Derli Conceição Munhoz

    2002-11-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Alguns hipnóticos podem interagir com os bloqueadores neuromusculares (BNM potencializando seus efeitos. O objetivo deste estudo foi avaliar a influência do propofol e do etomidato sobre o bloqueio neuromuscular produzido pelo rocurônio. MÉTODO: Foram incluídos no estudo 60 pacientes, estado físico ASA I e II, submetidos a cirurgias eletivas sob anestesia geral, distribuídos aleatoriamente em dois grupos de acordo com o hipnótico empregado: Grupo I (propofol e Grupo II (etomidato. Todos os pacientes receberam midazolam (0,1 mg.kg-1 por via muscular como medicação pré-anestésica, 30 minutos antes da cirurgia. A indução anestésica foi obtida com propofol (2,5 mg.kg-1 ou etomidato (0,3 mg.kg-1 precedido de alfentanil (50 µg.kg-1 e seguido de rocurônio (0,6 mg.kg-1. Os pacientes foram ventilados sob máscara com oxigênio a 100% até a obtenção de redução de 75% ou mais na amplitude da resposta do músculo adutor do polegar, quando foram realizadas as manobras de laringoscopia e intubação traqueal. A função neuromuscular foi monitorizada com aceleromiografia. Foram avaliados: tempo de início de ação do rocurônio (T1 JUSTIFICATIVA Y OBJETIVOS: Algunos hipnóticos pueden interactuar con los bloqueadores neuromusculares (BNM potencializando sus efectos. El objetivo de este estudio fue evaluar la influencia del propofol y del etomidato sobre el bloqueo neuromuscular producido por el rocuronio. MÉTODO: Fueron incluidos en el estudio 60 pacientes, estado físico ASA I y II, sometidos a cirugías electivas bajo anestesia general, distribuidos aleatoriamente en dos grupos de acuerdo con el hipnótico empleado: Grupo I (propofol y Grupo II (etomidato. Todos los pacientes recibieron midazolam (0,1 mg.kg-1 por vía muscular como medicación pré-anestésica, 30 minutos antes de la cirugía. La inducción anestésica fue obtenida con propofol (2,5 mg.kg-1 o etomidato (0,3 mg.kg-1 precedido de alfentanil

  4. [Indications for and frequency of intraoral radiographs].

    Science.gov (United States)

    Poorterman, J H G

    2015-05-01

    Radiographs are essential in dental practice today. Due to the exposure of patients to X-rays every radiograph has to be justified. The advantages and disadvantages of risks and diagnostic rewards have to be weighed against one another whenever X-ray imaging is considered. An important factor in this respect is the usefulness (in terms of sensitivity and specificity) of a radiograph and along with that, the monitoring of the quality of the entire process, from positioning the photo up to and including the development or scanning of it. Both for children and adults the indication for taking radiographs must be made on an individual basis. The most important considerations are: caries experience, oral hygiene and nutritional habits and exposure to fluorides. Based on these factors an individual risk assessment can be made and the possible benefit of bitewing radiographs for the dental treatment can be determined. European guidelines give advice on the indications and frequency of radiographs in, among other fields, periodontology, endodontology and implantology. PMID:26210219

  5. Influência da freqüência de estímulos na instalação do bloqueio neuromuscular produzido pelo rocurônio e pancurônio: avaliação pelo método acelerográfico Influencia de la frecuencia de estímulos en la instalación del bloqueo neuromuscular producido por el rocuronio y pancuronio: evaluación por el método acelerográfico Influence of stimulation frequency on rocuronium and pancuronium-induced neuromuscular block onset: acceleromyography evaluation

    Directory of Open Access Journals (Sweden)

    Derli da Conceição Munhóz

    2004-02-01

    entre os grupos. As condições de intubação traqueal foram satisfatórias em 117 pacientes (97,5% e insatisfatórias em 3 (2,5%. CONCLUSÕES: O início de ação e o tempo para obtenção do bloqueio neuromuscular total no músculo adutor do polegar, produzidos pelo rocurônio e pelo pancurônio, são mais curtos quando há emprego de maiores freqüências de estímulos.JUSTIFICATIVA Y OBJETIVOS: Factores relacionados al paciente y al bloqueador neuromuscular (BNM, así como otros inherentes a la monitorización de la función neuromuscular pueden influenciar en la instalación del bloqueo neuromuscular. El objetivo de este estudio fue evaluar la influencia de dos frecuencias diferentes de estímulos sobre el tiempo de instalación del bloqueo producido por el pancuronio y por el rocuronio. MÉTODO: Fueron incluidos en el estudio 120 pacientes, estado físico ASA I y II, sometidos a cirugías electivas bajo anestesia general, distribuidos aleatoriamente en dos grupos, de acuerdo con la frecuencia de estímulo empleada, para la monitorización del bloqueo neuromuscular: Grupo I - 0,1 Hz (n = 60 y Grupo II - 1 Hz (n = 60. En cada grupo se formaron dos subgrupos (n = 30 de acuerdo con el bloqueador neuromuscular empleado: Subgrupo P (pancuronio y Subgrupo R (rocuronio. La medicación pre-anestésica consistió de midazolam (0,1 mg.kg-1 por vía muscular, 30 minutos antes de la cirugía. La inducción anestésica fue obtenida con propofol (2,5 mg.kg-1 precedido de alfentanil (50 µg.kg-1 y seguido de pancuronio o rocuronio. Los pacientes fueron ventilados bajo máscara con oxígeno a 100% hasta la obtención de reducción de 75% o más en la amplitud de la respuesta del músculo aductor del pulgar, cuando fueron realizadas las maniobras de laringoscopia e intubación traqueal. La función neuromuscular fue monitorizada con aceleromiografia. Fueron evaluados: tiempo de inicio de acción del pancuronio y del rocuronio; tiempo para instalación del bloqueo total y

  6. Detection accuracy of proximal caries by cone-beam CT and digital intraoral radiography%数字口内X线片和口腔颌面锥形束CT对邻面龋诊断准确性的研究

    Institute of Scientific and Technical Information of China (English)

    程俊歌; 张智玲; 王晓燕; 李刚; 张祖燕; 马绪臣

    2011-01-01

    Objective To compare the accuracy of cone-beam computed tomography (CBCT) and digital intraoral radiography in the detection of proximal caries.Methods Forty-five non-restored human premolars or molars were selected for the study.The teeth,4 or 5 as a group,were mounted in 11 plaster blocks.The CBCT images of the tooth blocks were acquired with the ProMax 3D and the DCT Pro imaging systems,while the digital intraoral radiographs were obtained by a digital imaging system Digora Optime.Five postgraduates evaluated all the images for carious lesion in the 90 proximal surfaces using a five-level scale.With the histological examination serving as the reference standard,observers' performances were evaluated by receiver operating characteristic (ROC) curves.Results Fifty-eight proximal surfaces were sound,18 had enamel caries and 14 had dentine caries.No significant differences was found among the three modalities for the proximal caries detection ( P =0.186 ).When only the dentine caries was analyzed,significant difference was found between CBCT and digital intraoral radiography (P =0.004).No significant difference was noted when only enamel caries was analyzed (P =0.885 ).Conclusions Although CBCT was better than digital intraoral radiography in the detection accuracy of proximal caries,however,considering the relatively higher radiation dose,CBCT should not be used routinely to diagnose proximal caries in clinic.%目的 比较锥形束CT( cone beam computed tomography,CBCT)与数字口内X线片对邻面龋诊断的准确性,为临床提供适宜的检查手段.方法 5名观察者对45颗离体牙CBCT图像和数字口内片影像进行评估后得出受试者工作特征(receiver operating characteristic,ROC)曲线.结果 邻面龋(牙釉质+牙本质)诊断中CBCT与数字口内片比较,差异无统计学意义(P =0.186);单纯分析牙本质龋:CBCT与数字口内片比较差异有统计学意义(P =0.004);单纯分析牙釉质龋:CBCT与数字口内片比

  7. Analgesia pós-operatória com bloqueio bilateral do nervo pudendo com bupivacaína S75:R25 a 0,25%: estudo piloto em hemorroidectomia sob regime ambulatorial Analgesia pos-operatoria con bloqueo bilateral del nervio pudendo con bupivacaína S75:R25 a 0,25%: estudio piloto en hemorroidectomia bajo régimen ambulatorial Bilateral pudendal nerves block for postoperative analgesia with 0.25% S75:R25 bupivacaine: pilot study on outpatient hemorrhoidectomy

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    Luiz Eduardo Imbelloni

    2005-12-01

    permitirão demonstrar se esta técnica deve ser a primeira opção para analgesia em hemorroidectomias. A permanência de anestesia perineal por 20,21 horas deverá induzir novos trabalhos com o bloqueio dos nervos pudendos orientado por estimulador para o ato cirúrgico.JUSTIFICATIVA Y OBJETIVOS: La hemorroidectomia puede ser realizada bajo varias técnicas anestésicas y en régimen ambulatorial. El dolor pos-operatorio es intenso y puede atrasar el retorno para el hogar. El objetivo de este estudio fue evaluar las ventajas y la realización del bloqueo bilateral de los nervios pudendos para analgesia pos-operatoria en hemorroidectomias. MÉTODO: El bloqueo bilateral de los nervios pudendos con bupivacaína S75:R25 a 0,25% fue realizado con estimulador de nervios en 35 pacientes sometidos a la hemorroidectomia bajo raquianestesia. Fueron evaluadas intensidad del dolor, duración de la analgesia, analgesia de demanda y eventuales complicaciones relacionadas a la técnica. Los datos fueron evaluados a las 6, 12, 18, 24 y 30 horas después del término de la intervención quirúrgica. RESULTADOS: En todos los pacientes, fue logrado éxito con la estimulación de ambos los nervios pudendos. En ningún momento de la evaluación ocurrió dolor intenso. Hasta 12 horas después del bloqueo, todos los pacientes presentaron anestesia en la región perineal; con 18 horas, 17 pacientes y 24 horas, 10 pacientes A analgesia pos-operatoria fue óptima en 18 pacientes; satisfactoria, en cinco pacientes; e insatisfactoria, en siete pacientes. La duración media de la analgesia fue de 23,77 horas. No ocurrieron alteraciones de la presión arterial, de la frecuencia cardiaca, ni fueron observados náuseas o vómitos. Todos los pacientes tuvieron micción espontánea. Ninguna complicación local o sistémica fue relacionada al anestésico local. Veintisiete pacientes clasificaron de excelente la técnica de analgesia y apenas tres pacientes del sexo masculino quedaron satisfechos

  8. Precision of digital impressions with TRIOS under simulated intraoral impression taking conditions%模拟口腔取模环境下 TRIOS 数字印模的精密度

    Institute of Scientific and Technical Information of China (English)

    杨鑫; 孙一飞; 田雷; 司文捷; 冯海兰; 刘亦洪

    2015-01-01

    目的:研究模拟口腔取模环境下TRIOS数字印模的精密度,并与口外模型扫描的精密度比较。方法:制作6个#14~#17树脂牙列,其中#16为离体牙的全瓷冠预备体。对树脂牙列分别进行:(1)硅橡胶取印模,灌注石膏模型,3Shape D700模型扫描仪重复扫描10次;(2)固定于仿头模内,3Shape TRIOS口内扫描仪重复扫描10次。Geomagic Qualify12.0对重复扫描数据两两进行最佳拟合对齐和3D比较,分别输出配准数据间的平均偏差( aver-aged errors ,AE)和差异分布彩图。秩和检验定量分析数字印模组与模型组AE的差异,根据差异分布彩图定性描述偏差分布特征。结果:数字印模组AE均数为7.058281μm,高于模型组4.092363μm,差异具有统计学意义(P<0.05),但是数字印模组AE的均数和中位数均小于10μm,表明扫描数据间一致性良好。模型组偏差分布均匀,数字印模组偏差较大区域主要分布于肩台及邻面区域。结论:TRIOS数字印模精密度良好,可达到临床应用要求,预备体肩台及邻面区域为扫描的难点。%Objective:To evaluate the precision of digital impressions taken under simulated clinical impression taking conditions with TRIOS and to compare with the precision of extraoral digitalizations . Methods:Six #14 -#17 epoxy resin dentitions with extracted #16 tooth preparations embedded were made.For each artificial dentition , ( 1 ) a silicone rubber impression was taken with individual tray , poured with type IV plaster ,and digitalized with 3Shape D700 model scanner for 10 times;(2) fastened to a dental simulator , 10 digital impressions for each were taken with 3Shape TRIOS intraoral scanner .To assess the precision , best-fit algorithm and 3 D comparison were conducted between repeated scan models pairwise by Geomagic Qualify 12.0, exported as averaged errors (AE) and color-coded diagrams

  9. 舌骨下肌皮瓣修复口腔肿瘤术后缺损27例临床分析%Analysis of 27 cases of defect restoration using infrahyoid myocutaneous flap after intraoral cancer surgery

    Institute of Scientific and Technical Information of China (English)

    李彬; 李春华; 郭华; 陈锦; 王少新

    2008-01-01

    Objective To compare different surgical techniques and clinical effectiveness using infrahyoid myooutaneous flap to restore effects after intraoral cancer surgery.Methods It is a retrospective study in Sichuan cancer hospital, from May 1994 to March 2007, 27 cases were treated surgically with unilateral infrahyoid myocutaneous falp, 19 males and 8 famales.Seven cases of squamous cell tongue carcinoma, 4 eases of tongue root carcinoma, 16 cases of mouth floor carcinoma- The biggest flap was 4 cm × 8 cm.In 8 cases, the flap was formed since the remote end reverse vascular traveling and carried with inferior 1/3 muscular tissue of the stemocleidomastoid muscle on the same side (retrograde flap forming), in 19 cases, vascular pedicla was anatomied with microscopic blood vessel-operating skills along vascular traveling before the flap forming( anterograde flap forming).Eleven cases of the reservation vascularized and infrahyoid muscles in the hyoid attachment (combination pedicle), in 16 cases, the arteria and vena thyroidea superior reserved as the pedicel accompanied with the vena jugularis anterior ( the axial vessle pedicle) ; in 21 cases, the distal end of the vena jugulafis interna was tied up at the place where the vena facialis communis joins to the vena jugularis interna, and the vena jugularis anterior was reserved within the flap ( interference return).Results The survival rate of total 27 cases are 77.8%.The flap necrosis in two cases of total group, 1/3 - 1/2 skin necrosis of the flap was found in 4 cases, in the six cases, flap was formed with retrograde flap forming carry with the ipsilateral sternocleidomastoid, the reason of necrosis was venous flow obstruction.Twenty-one flaps of interference return are all survived, the flap in 19 cases with anterograde flap forming all survived, and 16 cases of the axial infrahyoid flap all survived.Follow-up nine months to 13 years with a median follow-up time for four years.Lost four cases, 23 followed up cases

  10. 模拟口腔取模环境下 TRIOS 数字印模的精密度%Precision of digital impressions with TRIOS under simulated intraoral impression taking conditions

    Institute of Scientific and Technical Information of China (English)

    杨鑫; 孙一飞; 田雷; 司文捷; 冯海兰; 刘亦洪

    2015-01-01

    目的:研究模拟口腔取模环境下TRIOS数字印模的精密度,并与口外模型扫描的精密度比较。方法:制作6个#14~#17树脂牙列,其中#16为离体牙的全瓷冠预备体。对树脂牙列分别进行:(1)硅橡胶取印模,灌注石膏模型,3Shape D700模型扫描仪重复扫描10次;(2)固定于仿头模内,3Shape TRIOS口内扫描仪重复扫描10次。Geomagic Qualify12.0对重复扫描数据两两进行最佳拟合对齐和3D比较,分别输出配准数据间的平均偏差( aver-aged errors ,AE)和差异分布彩图。秩和检验定量分析数字印模组与模型组AE的差异,根据差异分布彩图定性描述偏差分布特征。结果:数字印模组AE均数为7.058281μm,高于模型组4.092363μm,差异具有统计学意义(P<0.05),但是数字印模组AE的均数和中位数均小于10μm,表明扫描数据间一致性良好。模型组偏差分布均匀,数字印模组偏差较大区域主要分布于肩台及邻面区域。结论:TRIOS数字印模精密度良好,可达到临床应用要求,预备体肩台及邻面区域为扫描的难点。%Objective:To evaluate the precision of digital impressions taken under simulated clinical impression taking conditions with TRIOS and to compare with the precision of extraoral digitalizations . Methods:Six #14 -#17 epoxy resin dentitions with extracted #16 tooth preparations embedded were made.For each artificial dentition , ( 1 ) a silicone rubber impression was taken with individual tray , poured with type IV plaster ,and digitalized with 3Shape D700 model scanner for 10 times;(2) fastened to a dental simulator , 10 digital impressions for each were taken with 3Shape TRIOS intraoral scanner .To assess the precision , best-fit algorithm and 3 D comparison were conducted between repeated scan models pairwise by Geomagic Qualify 12.0, exported as averaged errors (AE) and color-coded diagrams

  11. Influência do lítio no bloqueio neuromuscular produzido pelo atracúrio e pelo cisatracúrio: estudo em preparações nervo frênico-diafragma de rato Influencia del litio en el bloqueo neuromuscular producido por el atracurio y por el cisatracurio: estudio en preparo nervio frénico-diafragma del ratón Influence of lithium on the neuromuscular blockade produced by atracurium and cisatracurium: study on rat phrenic nerve-diaphragm preparations

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    Samanta Cristina Antoniassi Fernandes

    2007-06-01

    ção pré-sináptica.JUSTIFICATIVA Y OBJETIVOS: El litio, fármaco ampliamente utilizado en los disturbios bipolares, puede interactuar con los bloqueadores neuromusculares. Los mecanismos para explicar sus efectos en la transmisión neuromuscular y en la interacción con bloqueadores neuromusculares son controvertidos. El objetivo de este trabajo fue evaluar, en diafragma de ratón, los efectos del litio sobre la respuesta muscular al estímulo indirecto y la posible interacción con los bloqueadores neuromusculares. MÉTODO: Se utilizaron ratones con peso entre 250 y 300 g, sacrificados bajo anestesia con uretana. La preparación nervio frénico-diafragma se montó de acuerdo con la técnica de Bulbring. El diafragma se mantuvo bajo tensión, ligado a un transductor isométrico y sometido a la estimulación indirecta de 0,1 Hz de frecuencia. Las contracciones del diafragma fueron registradas en un fisiógrafo. Del análisis de la amplitud de las respuestas musculares se evaluaron los efectos de los fármacos: litio (1,5 mg.mL-1; atracurio (20 µg.mL-1 y cisatracurio (3 µg.mL-1 empleados aisladamente; de la asociación litio-bloqueadores neuromusculares; y del litio en el bloqueo neuromuscular producido por el atracurio (35 µg.mL-1 y cisatracurio (5 µg.mL-1. Los efectos se evaluaron antes y 45 minutos después de la adición de los fármacos. También se estudiaron los efectos del litio en los potenciales de membrana (PM y potenciales de placa terminal en miniatura (PPTM. RESULTADOS: El litio aisladamente no alteró la amplitud de las respuestas musculares, pero sí que redujo significativamente el bloqueo neuromuscular producido por el atracurio y el cisatracurio. No alteró el PM y ocasionó un aumento inicial de la frecuencia de los PPTM. CONCLUSIONES: El litio empleado aisladamente no comprometió la transmisión neuromuscular y aumentó la resistencia al efecto del atracurio y del cisatracurio. No mostró acción sobre la fibra muscular, siendo que las

  12. Extenso nevo azul intraoral: relato de caso Extensive intraoral blue nevus: case report

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    Thiago de Santana Santos

    2011-08-01

    Full Text Available O nevo é uma má-formação congênita pigmentada, raramente encontrado na mucosa bucal. Cerca de 1/3 dos casos localizados nesta região anatômica são do tipo azul, uma variante histológica com considerável tendência à malignização. Este artigo relata o caso de um paciente do sexo masculino, tabagista crônico, portador de um nevo azul de 5 cm de diâmetro no palato duro. A excisão da lesão sem biópsia prévia foi a conduta terapêutica de eleição para o caso, uma vez que ainda existe controvérsia na literatura a respeito da realização de biópsia incisional em lesões pigmentadas malignas ou com potencial de malignização. O paciente foi acompanhado por um período de 2 anos, sem sinais de recorrência ou transformação malignaNevus is a congenital pigmented malformation rarely found in the oral mucosa. Around one third of cases located in this anatomical region are of the blue type, a histological variant with considerable tendency to malignancy. This study reports the case of a male patient, chronic smoker, with a blue nevus measuring 5cm in diameter on the hard palate. Since controversy exists in the literature regarding the incisional biopsy of pigmented lesions with malignant or malignant potential, excision without previous biopsy of the lesion was the therapy of choice for this case. The patient was followed-up for two years with no sign of recurrence or malignant transformation

  13. O exercício físico atenua o déficit autonômico cardíaco induzido pelo bloqueio da síntese do óxido nítrico El ejercicio físico atenúa el déficit autonómico cardiaco inducido por el bloqueo de la síntesis de óxido nítrico Physical exercise attenuates the cardiac autonomic deficit induced by nitric oxide synthesis blockade

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    Bruno Rafael Orsini Rossi

    2009-01-01

    Full Text Available FUNDAMENTO: O bloqueio da síntese do óxido nítrico (NO é caracterizado pelo aumento da atividade simpática cardíaca, e o treinamento físico promove a redução da atividade simpática. OBJETIVO: Investigamos o efeito do bloqueio da síntese do NO sobre o controle autonômico cardiovascular em ratos submetidos ao exercício aeróbio durante dez semanas. MÉTODOS: Ratos wistar foram divididos em quatro grupos: controle tratados com ração e água ad libitum durante dez semanas (RC; controle tratados com N G-nitro-L-arginine methyl ester (L-NAME na última semana (RCL; treinados durante dez semanas em esteira motorizada (RT; treinados por dez semanas e tratados com L-NAME na última semana (RTL. O controle autonômico cardiovascular foi investigado em todos os grupos com a utilização de duplo bloqueio com metilatropina e propranolol, e análise da variabilidade. RESULTADOS: Os grupos RCL e RTL apresentaram hipertensão. O grupo RCL apresentou taquicardia e predomínio do tônus simpático na determinação da FC após o bloqueio autonômico farmacológico. O grupo RT apresentou bradicardia e menor freqüência cardíaca (FC intrínseca em relação aos demais. A avaliação da variabilidade da FC mostrou menores valores absolutos e normalizados na banda de baixa freqüência (BF no grupo RCL. Por sua vez, o grupo RTL apresentou elevação na banda de BF em valores absolutos. A análise da variabilidade da PAS mostrou que os grupos RCL e RTL apresentaram maiores valores na banda de BF. CONCLUSÃO: O exercício físico prévio impediu o déficit no controle autonômico cardíaco induzido pelo tratamento com L-NAME, no entanto não impediu o aumento na variabilidade da PAS.FUNDAMENTO: El bloqueo de la síntesis de óxido nítrico (NO se caracteriza por el incremento de la actividad simpática cardiaca, y el entrenamiento físico promueve la reducción de la actividad simpática. OBJETIVO: Investigamos el efecto del bloqueo de la s

  14. Bloqueio peribulbar com a associação da mistura enantiomérica de bupivacaína (S75-R25 a 0,5% e lidocaína a 2%: efeitos da adição de hialuronidase Bloqueo peribulbar con la asociación de la mezcla enantiomérica de bupivacaína (S75-R25 a 0,5% y lidocaína a 2%: efectos de la adición de hialuronidasa Peribulbar block with the association of 0.5% enantiomeric mixture of bupivacaine (S75-R25 and 2% lidocaine: effects of hyaluronidase addition

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    Luiz Fernando Soares

    2002-07-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Os benefícios da adição de hialuronidase ao anestésico local em bloqueio peribulbar permanecem controversos. Este estudo comparou os efeitos da hialuronidase sobre a acinesia dos músculos retos, elevador da pálpebra e orbicular do olho após a realização de bloqueio peribulbar com a associação da mistura enantiomérica de bupivacaína (S75-R25 a 0,5% e lidocaína a 2%. MÉTODO: Foram estudados 35 pacientes divididos em grupo 1, que recebeu uma combinação de iguais volumes de mistura enantiomérica de bupivacaína (S75-R25 a 0,5% e lidocaína a 2% com adrenalina 5 µg.ml-1 e grupo 2, que recebeu a mesma solução anestésica adicionada de hialuronidase 50 UI.ml-1. A motilidade dos músculos retos, orbicular do olho e elevador da pálpebra foi avaliada 1, 5, 10 e 15 minutos após o bloqueio. RESULTADOS: Os escores de motilidade dos músculos extra-oculares diminuíram significativamente durante o período de observação, sem diferenças entre os grupos. Os percentuais de pacientes que apresentaram acinesia do globo ocular em cada momento do estudo não diferiram significativamente entre os grupos. Os escores de dor à injeção do anestésico local não diferiram entre os grupos. A anestesia cirúrgica foi satisfatória em todos os pacientes. CONCLUSÕES: Este estudo não demonstrou nenhum efeito da adição de hialuronidase na concentração de 50 UI.ml-1 sobre a acinesia dos músculos retos, elevador da pálpebra e orbicular do olho durante a instalação de bloqueio peribulbar realizado com a associação da mistura enantiomérica de bupivacaína (S75-R25 a 0,5% e lidocaína a 2% com adrenalina 5 µg.ml-1.JUSTIFICATIVA Y OBJETIVOS: Los beneficios de la adición de hialuronidasa al anestésico local en bloqueo peribulbar permanecen en controversia. Este estudio comparó los efectos de la hialuronidasa sobre la acinesia de los músculos rectos, elevador de la pálpebra y orbicular del ojo después de la

  15. Bloqueio 3-em-1 prolongado versus analgesia sistêmica no tratamento da dor pós-operatória após a reconstrução do ligamento cruzado anterior do joelho Bloqueo 3 en 1 prolongado versus analgesia sistemica en el tratamiento del dolor postoperatorio después de la reconstrucción del ligamento cruzado anterior de la rodilla Extended three-in-one block versus intravenous analgesia for postoperative pain management after reconstruction of anterior cruciate ligament of the knee

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    Víctor A. Contreras-Domínguez

    2007-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio femoral contínuo (3-em-1 é usado para a analgesia pós-operatória de artroplastia de quadril e joelho com bons resultados, apresentando vantagens sobre outras técnicas de analgesia locorregional ou sistêmica e com baixa incidência de complicações. O objetivo deste estudo foi avaliar clinicamente a utilidade do bloqueio femoral contínuo em comparação com a analgesia por via venosa na reconstrução do ligamento cruzado anterior. MÉTODO: Foi realizado um estudo prospectivo, controlado, com 60 pacientes com estado físico ASA I. Os paciente foram divididos em dois grupos: Grupo 1 (n = 30: bloqueio femoral contínuo com infusão de bupivacaína e clonidina; Grupo 2 (n = 30: infusão por via venosa de cetoprofeno. A intervenção cirúrgica foi realizada sob raquianestesia e sedação. O tratamento da dor pós-operatória foi feito com analgesia controlada pelo paciente (PCA usando morfina. A dor pós-operatória foi registrada 2, 4, 6, 24 e 36 horas após a intervenção cirúrgica usando a Escala Visual Analógica (VAS. O consumo de morfina, a satisfação dos pacientes e as complicações também foram registradas. RESULTADOS: No Grupo 1, o VAS pós-operatório entre 4 e 48 horas após a intervenção cirúrgica foi de 21 mm ± 2 e no Grupo 2 foi de 45 mm ± 4 (p JUSTIFICATIVA Y OBJETIVOS: El bloqueo femoral continuo (tres-en-uno se usa para la analgesia postoperatoria de artroplastia de cadera y rodilla con buenos resultados, presentando ventajas sobre otras técnicas de analgesia loco regional o sistemica y con baja incidencia de complicaciones. El objetivo de este estudio fue el de evaluar clínicamente la utilidad del bloqueo femoral continuo en comparación con la analgesia intravenosa en la reconstrucción del ligamento cruzado anterior. MÉTODOS: Se realizó un estudio prospectivo controlado con 60 pacientes de estado físico ASA I. Los pacientes fueron divididos en dos grupos: Grupo 1 (n

  16. Anestesia venosa total em infusão alvo-controlada associada a bloqueio do nervo femoral para meniscectomia do joelho por acesso artroscópico Anestesia venosa total en infusión objeto-controlada asociada al bloqueo del nervio femoral para meniscectomía de la rodilla por acceso artroscópico Target-controlled total intravenous anesthesia associated with femoral nerve block for arthroscopic knee meniscectomy

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    Fernando Squeff Nora

    2009-04-01

    procedimientos que anteriormente se asociaban a un extenso período de ingreso. Este trabajo presenta una técnica de anestesia general venosa total con propofol y remifentanil combinada con el bloqueo del nervio femoral por acceso perivascular inguinal. MÉTODO: Se incluyeron 90 pacientes sometidos a artroscopia de la rodilla para meniscectomías. La inducción anestésica se hizo con propofol en infusión objeto controlada (IAC (objetivo = 4 µg.mL-1 y con remifentanil en IAC (objeto = 3 ng.mL-1. Las alteraciones de las concentraciones de propofol y remifentanil eran realizadas de acuerdo con la electroencefalografía bispectral (BIS y la presión arterial promedio (PAM. La ventilación era mecánica y controlada a volumen; la vía aérea se mantenía con máscara laríngea. Los valores de las concentraciones en el local efector de propofol y remifentanil se obtenían a través de los modelos farmacocinéticos de los fármacos, insertados en las bombas de IAC y correspondieron a las concentraciones predictibles. El local efector se refiere al local de acción de los fármacos. El tiempo de alta comprendió el espacio de tiempo entre la llegada del paciente a la sala de recuperación hasta el momento del alta. RESULTADOS: Las concentraciones promedios en el local efector (ng.mL-1, máximas y mínimas de remifentanil fueron de 3,5 y 2,4 respectivamente. Las concentraciones promedios en el local efector (µg.mL-1, máximas y mínimas de propofol, fueron respectivamente de 3,1 y 2,6. El caudal promedio de infusión de propofol y de remifentanil fue de 8,54 mg.kg-1.h-1 y de 0,12 µg.kg-1.min-1, respectivamente. Los tiempos de alta fueron como promedio de 180 min. CONCLUSIONES: Todos los pacientes se mantuvieron dentro de los parámetros establecidos.BACKGROUND AND OBJECTIVES: The increased popularity of minimally invasive surgical techniques reduced recovery time of procedures that were usually associated with prolonged hospitalization. This study reports the technique of total

  17. Influência de anestésicos locais sobre o bloqueio neuromuscular produzido pelo rocurônio: ação da lidocaína e da mistura enantiomérica em excesso de 50% de bupivacaína na junção neuromuscular Influencia de anestésicos locales sobre el bloqueo neuromuscular producido por el rocuronio: acción de la lidocaína y de la mezcla enantiomérica en exceso de 50% de bupivacaína en la junción neuromuscular Influence of local anesthetics on the neuromuscular blockade produced by rocuronium: effects of lidocaine and 50% enantiomeric excess bupivacaine on the neuromuscular junction

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    Angélica de Fátima de Assunção Braga

    2009-12-01

    OBJETIVOS: Los efectos de los anestésicos locales (AL, en la transmisión neuromuscular y su influencia en el bloqueo neuromuscular producido por bloqueadores neuromusculares competitivos, todavía no se ha investigado lo suficiente. El objetivo del estudio, fue evaluar in vitro los efectos de la lidocaína y de la mezcla enantiomérica en exceso de 50% de bupivacaína (S75-R25 en el bloqueo neuromuscular producido por el rocuronio. MÉTODOS: Algunos ratones se distribuyeron en cinco grupos (n = 5 de acuerdo con el fármaco estudiado: lidocaína, bupivacaína (S75-R25, rocuronio, aisladamente (Grupos I, II, III; rocuronio en preparaciones previamente expuestas a los AL (Grupos IV, V. Las concentraciones utilizadas fueron: 20 µg.mL-1, 5 µg.mL-1 y 4 µg.mL-1, para lidocaína, bupivacaína (S75-R25, y rocuronio, respectivamente. Se evaluó: 1 la fuerza de contracción muscular del diafragma a la estimulación eléctrica indirecta, antes y 60 minutos después de la adición de los AL y rocuronio aisladamente, y la asociación AL - rocuronio; 2 efectos de los AL sobre el potencial de la membrana (PM y potenciales de placa terminal en miniatura (PPTM. En una preparación biventer cérvicis de pollito, se evaluó el efecto de los AL en la respuesta de contracción a la acetilcolina. RESULTADOS: La lidocaína y la bupivacaína (S75-R25 aisladamente, no alteraron las respuestas musculares y los valores del PM. En las preparaciones expuestas a los AL, el bloqueo por el rocuronio fue significativamente mayor con relación al producido por el rocuronio aisladamente. En una preparación biventer cervicis de pollito, la lidocaína y la bupivacaína (S75-R25, redujeron la respuesta de contracción a la acetilcolina. La lidocaína aumentó la frecuencia de los PPTM, seguido de bloqueo; la bupivacaína (S75-R25 generó una disminución seguida de bloqueo. CONCLUSIONES: Los anestésicos locales potenciaron el bloqueo neuromuscular causado por el rocuronio. Los resultados mostraron una

  18. 疼痛性冷刺激和非痛温热刺激口腔时对大脑皮层反应强度的影响%Effects of noxious coldness and non-noxious warmth on the magnitude of cerebral cortex activation during intraoral stimulation with water

    Institute of Scientific and Technical Information of China (English)

    杨秀文; 刘洪臣; 李科; 金真; 刘刚

    2014-01-01

    Objective We used functional magnetic resonance imaging (fMRI) to explore the effects of noxious coldness and non-noxious warmth on the magnitude of cerebral cortex activation during intraoral stimulation with water. Methods Six male and female subjects were subjected to whole-brain fMRI during the phasic delivery of non-noxious hot (23 ℃) and noxious cold (4 ℃) water intraoral stimulation. A block-design blood oxygenation level-dependent fMRI scan covering the entire brain was also carried out. Results The activated cortical areas were as follows: left pre-/post-central gyrus, insula/ operculum, anterior cingulate cortex (ACC), orbital frontal cortex (OFC), midbrain red nucleus, and thalamus. The activated cortical areas under cold condition were as follows: left occipital lobe, premotor cortex/Brodmann area (BA) 6, right motor language area BA44, lingual gyrus, parietal lobule (BA7, 40), and primary somatosensory cortex SⅠ. Comparisons of the regional cerebral blood flow response magnitude were made among stereotactically concordant brain regions that showed significant responses under the two conditions of this study. Compared with non-noxious warmth, more regions were activated in noxious coldness, and the magnitude of activation in areas produced after non-noxious warm stimulation significantly increased. However, ACC only significantly increased the magnitude of activation under noxious coldness stimulation. Conclusion Results suggested that a similar network of regions was activated common to the perception of pain and nopain produced by either non-noxious warmth or noxious coldness stimulation. Non-noxious warmth also activated more brain regions and significantly increased the response magnitude of cerebral-cortex activation compared with noxious coldness. Noxious coldness stimulation further significantly increased the magnitude of activation in ACC areas compared with noxious warmth.%目的:探索疼痛性冷刺激和非痛温热刺激口腔时

  19. Consideraciones clínicas en la obtención de injertos óseos intraorales: Técnica quirúrgica y evaluación de las complicaciones Considerations for intraoral osseous graft remove: Technique and complications management

    Directory of Open Access Journals (Sweden)

    F. Rocha

    2010-08-01

    Full Text Available Las técnicas de remoción de injertos intraorales están bien descritas en la literatura internacional; sin embargo, siempre es importante recordar las condiciones que pueden influir en la presencia de complicaciones transquirúrgicas y postquirúrgicas. Por otra parte, las técnicas de reconstrucción ósea son realizadas por muchos cirujanos dentistas, con diferentes grados de formación, lo que puede permitir el desconocimiento de algunos puntos importantes cuando se realice el procedimiento quirúrgico. Los autores realizan una revisión de la literatura con énfasis en las condiciones de la técnica quirúrgica, tipos de complicaciones y su manejo. Finalmente, podemos señalar que después de protocolizar las técnicas quirúrgicas, el siguiente paso es el manejo de las complicaciones, que pueden disminuir con una correcta conducta quirúrgica.A technique for intraoral graft remove are well described in the international literature, but always is important to remember the conditions that can influenced for complications in surgical and post surgical time. Considering this, the osseous graft technique are be executed for many dental practitioner, with different type of formation, that can lead to ignorance of some the moment of to realize the surgical procedure. The author´s realize a literature review with emphasis in the conditions of the surgical technique, type of complications and your management. Finally, can be say that after of construed a surgical protocol, the protocol for complications management can be the next way. The complications could be diminished with a properly surgical procedure.

  20. Volumes efetivos de anestésicos locais para o bloqueio do compartimento da fáscia ilíaca: estudo comparativo duplamente encoberto entre ropivacaína a 0,5% e bupivacaína a 0,5% Volúmenes efectivos de anestésicos locales para el bloqueo del compartimiento de la fascia ilíaca: estudio comparativo doblemente encubierto entre ropivacaína a 0,5% y bupivacaína a 0,5% Effective volume of local anesthetics for fascia iliac compartment block: a double-blind, comparative study between 0.5% ropivacaine and 0.5% bupivacaine

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2006-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio do compartimento da fáscia ilíaca é amplamente empregado como parte das técnicas anestésicas para intervenções cirúrgicas de quadril, coxa e joelho. A maioria dos estudos tem utilizado volumes fixos de ropivacaína ou de bupivacaína. Este estudo teve como objetivo calcular os volumes de ropivacaína a 0,5% e de bupivacaína a 0,5% efetivos em 50% (VE50, 95% (VE95 e 99% (VE99 dos casos para realização de bloqueios do compartimento da fáscia ilíaca. MÉTODO: Cinqüenta e um adultos agendados para intervenções cirúrgicas eletivas do quadril, diáfise femoral e joelho foram submetidos ao bloqueio do compartimento da fáscia ilíaca. Os pacientes foram aleatoriamente distribuídos e receberam ropivacaína a 0,5% (n = 25 ou bupivacaína a 0,5% (n = 26. O sucesso do bloqueio foi definido como bloqueio sensitivo completo das regiões anterior, medial e lateral da coxa. O volume anestésico foi determinado pelo método up-and-down de Massey e Dixon e os volumes efetivos foram calculados pelas fórmulas de Massey e Dixon (VE50 e por regressão de probits (VE50, VE95 e VE99. RESULTADOS: Os volumes anestésicos capazes de produzir bloqueio nervoso efetivo em 50% dos casos, calculados pela formula de Massey e Dixon, foram 28,79 mL (IC 95%: 26,31 - 31,5 mL para ropivacaína e 29,56 mL (IC 95%: 25,22 - 34,64 mL para bupivacaína (p = 0,62. Os volumes efetivos de ropivacaína capazes de bloquear 50%, 95% e 99% dos casos foram estimados pela regressão de probits como 28,8 mL (27,2 - 30,4, 34,3 mL (32,5 - 37,3 e 36,6 mL (34,3 - 40,5, respectivamente. Os volumes correspondentes de bupivacaína foram 29,5 mL (28,1 - 31,1, 36,1 mL (33,5 - 38,1, e 37,3 mL (35,1 - 41,3 (p JUSTIFICATIVA Y OBJETIVOS: El bloqueo del compartimento de la fascia ilíaca es ampliamente empleado como parte de las técnicas anestésicas para intervenciones quirúrgicas de la cadera, muslo y rodilla. La mayoría de los estudios han

  1. Bupivacaína racêmica a 0,5% e mistura com excesso enantiomérico de 50% (S75-R25 a 0,5% no bloqueio do plexo braquial para cirurgia ortopédica. Estudo comparativo Bupivacaína racémica a 0,5% y mezcla con exceso enantiomérico del 50% (S75-R25 a 0,5% en el bloqueo del plexo braquial para cirugía ortopédica. Estudio comparativo Comparative study of 0.5% racemic bupivacaine versus enantiomeric mixture (S75-R25 of 0.5% bupivacaine in brachial plexus block for orthopedic surgery

    Directory of Open Access Journals (Sweden)

    Roberto Tsuneo Cervato Sato

    2005-04-01

    cirurgia ortopédica de membro superior.JUSTIFICATIVA Y OBJETIVOS: Con la finalidad de encontrar una droga más segura que la bupivacaína racémica, varios estudios fueron realizados con sus isómeros. Este estudio tiene como objetivo evaluar la eficacia de la mezcla con exceso enantiomérico del 50% (MEE50% de bupivacaína (S75-R25 a 0,5% comparada la de la bupivacaína racémica a 0,5% en el bloqueo del plexo braquial en pacientes sometidos a cirugía ortopédica de miembros superiores. MÉTODO: Participaron de este estudio, aleatorio y doblemente encubierto, 40 pacientes, con edade entre 18 y 90 años, estado físico ASA I y II, sometidos a cirugía ortopédica de miembros superiores, distribuidos en dos grupos: Grupo R, que recibió la solución de bupivacaína racémica a 0,5%, y Grupo L, que recibió la solución de la mezcla con exceso enantiomérico del 50% de bupivacaína (S75-R25 a 0,5%, ambas con epinefrina 1:200.000 y en un volumen de 0,6 mL.kg-1 (3 mg.kg-1, limitados a 40 mL. Fueron investigadas las características motoras y sensoriales de cada nervio envolvido (nervios musculocutáneo, radial, mediano, ulnar y cutáneo medial del antebrazo, bien como la incidencia de efectos colaterales. RESULTADOS: No hubo diferencia estadística significativa con relación a los aspectos demográficos. Los parámetros hemodinámicos fueron semejantes entre los grupos, solo que la presión arterial sistólica fue mayor en el Grupo R. No hubo diferencia significativa con relación al tiempo necesario para alcanzar la mayor intensidad de los bloqueos motor y sensitivo. Con una excepción, la latencia del bloqueo motor del grupo muscular inervado por el n. ulnar fue mayor en el Grupo L (10,75 versus 14,25 minutos. CONCLUSIONES: En ambos grupos fueron observados bloqueos motor y sensitivo adecuados para la realización de la cirugía, con pocos efectos colaterales, sugiriendo que la mezcla con exceso enantiomérico del 50% de bupivacaína (S75-R25 a 0,5% con epinefrina es

  2. Heridas atípicas de entrada y salida por proyectil de alta velocidad con posición intrabucal: Procedimientos sugeridos en Patología Oral Forense Atypical entrance and exit wounds due to high velocity bullet with intraoral position: Suggested procedures in Forensic Oral Pathology

    Directory of Open Access Journals (Sweden)

    Gabriel M. Fonseca

    2009-07-01

    Full Text Available Se presenta un caso de muerte por abocamiento de Fusil Automático Liviano -FAL, calibre 7.62 x 51 mm NATO, proyectil de alta velocidad (810 m/s, con una configuración atípica en sus heridas de entrada y salida, la primera con grandes contusiones y desgarros orales y periorales tanto en tejidos blandos como duros (fracturas dentarias y óseas y la segunda con una pequeña lesión perforante a nivel cervical, ambas morfologías originadas por transmisión de la energía cinética y de escaso reporte en la literatura. Dadas estas condiciones atípicas, se expone el procedimiento realizado de cuña lingual para corroborar la presencia de productos de la deflagración de la pólvora y con ello el abocamiento del arma, y se presenta a la denominación de Patología Oral Forense como la especialidad odontológica dedicada a la "identificación, documentación, recolección y preservación de todos los indicios en tejidos duros y blandos bucales, susceptibles de transformarse en evidencia jurídica", netamente más compleja que el reconocido pero injustamente circunscrito procedimiento de identificación por vías odontológicas.We present an intraoral shooting fatality case by Fusil Automatique Leger - FAL, high velocity infantry rifle 7.62 x 51 mm NATO, 810 m/s, with the atypical morphology of the entrance and exit wounds. Entrance showed great contused wound on mouth and periorifitial in both soft and hard tissues (fractures of teeth and bones and exit wound showed a small perforation in cervix. The effective kinetic energy was the most significant factor determining those exiguously reported patterns. Because of the atypical conditions, we present the performing of the tongue sample extraction to demonstrate the presence of powder particles and confirm the oral wound as the entry wound. We suggest the term Forensic Oral Pathology to define the speciality of dentistry studying the "identification, documentation, recovering and saving of all sings

  3. 小切口结合口内切口治疗颧骨骨折14列临床研究%Analysis on clinical diagnosis of 14 cases on Facial beauty in small incision with Intraoral incision in the treatment of Fracture of malar bone

    Institute of Scientific and Technical Information of China (English)

    田宏伟

    2014-01-01

    Cheekbones is one of the most important part in the face. Located lateralin the face. And it is vulnerable to external fracture. Fracture of zygomatic bonewill lead to the collapse of the facial lateral side,and the displacement of bone fragment. Thus,coronoid process will be oppressed,leading to disorder of open mouth and the eyes. Zygomatic complex fracture is in the third place of the face of jaw fracture,after the he nasal bone fracture. According to the 14 cases zygomatic fracture patients that treated by our hospital,adopting the method of intraoral incision with prettified incision infacial beauty is a good way to cure fracture of zygomatic arch. In that way,reduction will be open openly. And the zygoma, Junction of the exognathion and theouter orbital are well exposed. Postoperative,operation scar is petty with good recovery and no facial nerve damage. Zygoma shape and the patient’s open and close of the mouth are also recover well.%颧骨是面部最突出的部位之一,位于面侧方,易受外力发生骨折。颧弓骨折,会导致面侧方塌陷畸形或增宽,骨折片向下移位,压迫冠突导致张口受限和眼部功能障碍。颧骨复合体骨折,在颌面部骨折折构成比仅次于鼻骨骨折及眶骨骨折占第3位。总结我科自2011年1月~2012年12月收治手术的14例颧骨骨折病人,采用口内切口结合面部美容小切口,可以在直视下开放复位,较好的暴露颧骨,上颌骨连接处及眶外、眶下区骨折,内固定后恢复良好,手术瘢痕小,面神经无损伤,患者外形及张闭口恢复较好。

  4. Analysis on clinical diagnosis of 14 cases on Facial beauty in small incision with Intraoral incision in the treatment of Fracture of malar bone%小切口结合口内切口治疗颧骨骨折14列临床研究

    Institute of Scientific and Technical Information of China (English)

    田宏伟

    2014-01-01

    颧骨是面部最突出的部位之一,位于面侧方,易受外力发生骨折。颧弓骨折,会导致面侧方塌陷畸形或增宽,骨折片向下移位,压迫冠突导致张口受限和眼部功能障碍。颧骨复合体骨折,在颌面部骨折折构成比仅次于鼻骨骨折及眶骨骨折占第3位。总结我科自2011年1月~2012年12月收治手术的14例颧骨骨折病人,采用口内切口结合面部美容小切口,可以在直视下开放复位,较好的暴露颧骨,上颌骨连接处及眶外、眶下区骨折,内固定后恢复良好,手术瘢痕小,面神经无损伤,患者外形及张闭口恢复较好。%Cheekbones is one of the most important part in the face. Located lateralin the face. And it is vulnerable to external fracture. Fracture of zygomatic bonewill lead to the collapse of the facial lateral side,and the displacement of bone fragment. Thus,coronoid process will be oppressed,leading to disorder of open mouth and the eyes. Zygomatic complex fracture is in the third place of the face of jaw fracture,after the he nasal bone fracture. According to the 14 cases zygomatic fracture patients that treated by our hospital,adopting the method of intraoral incision with prettified incision infacial beauty is a good way to cure fracture of zygomatic arch. In that way,reduction will be open openly. And the zygoma, Junction of the exognathion and theouter orbital are well exposed. Postoperative,operation scar is petty with good recovery and no facial nerve damage. Zygoma shape and the patient’s open and close of the mouth are also recover well.

  5. Comunicación y bloqueo institucional.- El caso de Canal 13 [de Costa Rica

    Directory of Open Access Journals (Sweden)

    Lic. William Ortiz A.

    1999-01-01

    Full Text Available institución especializada en la comunicación social puede ser estudiada de muchas maneras. El abordaje que procuramos asume una perspectiva crítica y considera la institución desde el punto de vista de la relación entre un mensaje y un sujeto receptor, es decir, se trata de la relación que vincula un conjunto de programas emitidos con un público, el cual los consume en su calidad de espectador. Pero como esta relación no se materializa si no es al interior de una sociedad, interesa situar constantemente a la institución dentro de la colectividad humana de la que forma parte y, más concretamente, dentro del estado y no dentro de la sociedad civil.

  6. Bloqueo epidural lumbar continuo para espasmos vesicales incoercibles Continuous lumbar epidural uncontrollable bladder spasms

    OpenAIRE

    C. López Carballo; S. Vázquez del Valle; M. Garrido García; J. Pico Veloso; R. Valle Yáñez; M. J. Bermúdez López; F. J. Pardo-Sobrino López

    2013-01-01

    Presentamos un caso clínico de espasmos vesicales por hiperactividad del detrusor de la vejiga, desencadenados por lavado vesical continuo aplicado en un paciente con hematuria, en el contexto de hipertrofia benigna de próstata. Los espasmos llegaron a ser refractarios a tratamiento sistémico con antimuscarínicos, espasmolíticos y opioides. Se optó por la colocación de un catéter epidural lumbar para infusión continua de anestésicos locales y opioides como terapia analgésica alternativa, que ...

  7. Intraoral fiber-optic-based diagnostic for periodontal disease

    Science.gov (United States)

    Colston, Bill W., Jr.; Gutierrez, Dora M.; Everett, Matthew J.; Brown, Steve B.; Langry, Kevin C.; Cox, Weldon R.; Johnson, Paul W.; Roe, Jeffrey N.

    2000-05-01

    The purpose of this initial study was to begin development of a new, objective diagnostic instrument that will allow simultaneous quantitation of multiple proteases within a single periodontal pocket using a chemical fiber optic senor. This approach could potentially be adapted to use specific antibodies and chemiluminescence to detect and quantitate virtually any compound and compare concentrations of different compounds within the same periodontal pocket. The device could also be used to assay secretions in salivary ducts or from a variety of wounds. The applicability is, therefore, not solely limited to dentistry and the device would be important both for clinical diagnostics and as a research too.

  8. Initial Experience With a New Intraoral Midface Distraction Device

    Science.gov (United States)

    Burstein, Fernando; Soldanska, Magdalena; Granger, Michael; Berhane, ChiChi; Schoemann, Mark

    2015-01-01

    Abstract Maxillary hypoplasia that necessitates surgical advancement affects approximately 25% of patients born with cleft lip and palate. Syndromic conditions such as Crouzon may also be accompanied by significant maxillary hypoplasia. Severe maxillary hypoplasia can result in airway obstruction, malocclusion, proptosis, and facial disfigurement. For optimal stability, severe hypoplasia is best addressed with maxillary distraction osteogenesis. Twenty-two patients (15 boys, 7 girls, ages 6–16 years, mean age 10 years) with severe midface hypoplasia underwent midface distraction with new internal maxillary distraction (IMD) device at our institution. Total distraction distances ranged from 15 to 30 mm. There were no major complications, and all of them had improvement in functional and aesthetic parameters. There were 2 minor complications and 2 patients failed to distract the full distance because of converging vectors. Early maxillary distraction in patients with severe midface hypoplasia is a useful technique to provide interval correction of severe maxillary hypoplasia before skeletal maturity and definitive orthognathic surgery is contemplated, and it is a good tool to improve occlusion, aesthetics, and self-perception in younger patients. PMID:26080162

  9. Characterization of fibroblast phenotypes in intra-oral wound healing

    NARCIS (Netherlands)

    Beurden, H.E. van

    2006-01-01

    Wound contraction and subsequent scar tissue formation is thought to be a main cause of the maxillary and dento-alveolar growth inhibition observed after cleft palate surgery. A reduction in wound contraction and scar tissue formation might prevent these iatrogenic effects. To achieve this, differen

  10. Accidental intraoral formalin injection: a rare case report

    Directory of Open Access Journals (Sweden)

    Ramakant Dandriyal

    2014-12-01

    Full Text Available Formalin is a hazardous chemical that needs cautious handling and special storage. Owing to its disinfectant and fixative (i.e. for preserving pathologic tissue specimens in histopathology properties, it is widely used in dentistry. Although, the terms formaldehyde and formalin are often confused as being identical, these are different as to the concentrations of the primary component i.e. formaldehyde. In fact, the common fixative available as 10% neutral buffered formalin is actually a 4% solution of formaldehyde (i.e., a 10% solution made from a 37-40% commercially pure formaldehyde solution. This case report describes an unfortunate case of accidental injection instead of local anesthetic, of formalin into the pterygomandibular space in a 35-year old woman during inferior alveolar nerve block for surgical removal of impacted lower right third molar and its successful management by cautious debridement (under both local and general anesthesia and empirical drug therapy (utilizing analgesics and antibiotics.

  11. Intraoral fiber optic-based diagnostic for periodontal disease

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, P W; Gutierrez, D M; Everett, M J; Brown, S B; Langry, K C; Colston, B W; Roe, J N

    2000-01-21

    The purpose of this initial study was to begin development of a new, objective diagnostic instrument that will allow simultaneous quantitation of multiple proteases within a single periodontal pocket using a chemical fiber optic sensor. This approach could potentially be adapted to use specific antibodies and chemiluminescence to detect and quantitate virtually any compound and compare concentrations of different compounds within the same periodontal pocket. The device could also be used to assay secretions in salivary ducts or from a variety of wounds. The applicability is, therefore, not solely limited to dentistry and the device would be important both for clinical diagnostics and as a research tool.

  12. Quality criteria for intraoral X-ray films

    International Nuclear Information System (INIS)

    The apical and marginal parodontium are the main targets in dental roentgenology. The most important structural details are of 0.1 to 1.0 mm size. Their imaging is determined by - among other parameters - the X-ray film technique. This article presents quality criteria for a number of standard projections, that appear suitable for assessing the image quality. Other factors determining the characteristics of an X-ray film have been neglected, the only exception being a short treatise on the importance of contrast. (orig.)

  13. Nevus of Ota”- A Rare Pigmentation Disorder with Intraoral Findings

    Science.gov (United States)

    Gupta, Sarika; Sharma, Nisha; Singh, Meenakshi; Bhateja, Sumit

    2014-01-01

    Nevus of Ota is a dermal melanocytosis seen along the distribution of ophthalmic and maxillary divisions of the trigeminal nerve. Only 12 cases so far have been reported in English literature and it is rare in Indian subcontinent. Most of the cases reported are in females and oral cavity is infrequently involved. Here, we report a rare case of unilateral Nevus of Ota in a 56-year-old male with oral manifestations. PMID:25302286

  14. Oral functional outcome after intraoral reconstruction with nasolabial flaps

    NARCIS (Netherlands)

    Hofstra, EI; Hofer, SOP; Nauta, JM; Roodenburg, JLN; Lichtendahl, DHE

    2004-01-01

    In this study, the functional and aesthetic outcome of patients with nasolabial flaps in the floor of the mouth was examined. Sixteen patients underwent reconstruction of the floor of the mouth with 19 nasolabial flaps after resection of a squamous cell carcinoma. Eight patients received postoperati

  15. Family Of Calibrated Stereometric Cameras For Direct Intraoral Use

    Science.gov (United States)

    Curry, Sean; Moffitt, Francis; Symes, Douglas; Baumrind, Sheldon

    1983-07-01

    In order to study empirically the relative efficiencies of different types of orthodontic appliances in repositioning teeth in vivo, we have designed and constructed a pair of fixed-focus, normal case, fully-calibrated stereometric cameras. One is used to obtain stereo photography of single teeth, at a scale of approximately 2:1, and the other is designed for stereo imaging of the entire dentition, study casts, facial structures, and other related objects at a scale of approximately 1:8. Twin lenses simultaneously expose adjacent frames on a single roll of 70 mm film. Physical flatness of the film is ensured by the use of a spring-loaded metal pressure plate. The film is forced against a 3/16" optical glass plate upon which is etched an array of 16 fiducial marks which divide the film format into 9 rectangular regions. Using this approach, it has been possible to produce photographs which are undistorted for qualitative viewing and from which quantitative data can be acquired by direct digitization of conventional photographic enlargements. We are in the process of designing additional members of this family of cameras. All calibration and data acquisition and analysis techniques previously developed will be directly applicable to these new cameras.

  16. Volumes anestésicos efetivos no bloqueio do nervo isquiático: comparação entre as abordagens parassacral e infraglútea-arabiceptal com bupivacaína a 0,5% com adrenalina e ropivacaína a 0,5% Volúmenes anestésicos efectivos en el bloqueo del nervio isquiático: comparación entre los abordajes parasacral e infraglúteo-parabicipital con bupivacaína a 0,5% con adrenalina y ropivacaína a 0,5% Effective anesthetic volumes in sciatic nerve block: comparison between the parasacral and infragluteal-parabiceps approaches with 0.5% bupivacaine with adrenaline and 0.5% ropivacaine

    Directory of Open Access Journals (Sweden)

    Pablo Escovedo Helayel

    2009-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O volume e a massa das soluções de anestésico local (AL influenciam a taxa de sucesso dos bloqueios periféricos. Desta forma, o objetivo principal do estudo foi determinar os volumes de anestésico local para o bloqueio do nervo isquiático (BNI nas abordagens parassacral e infraglútea-parabiceptal. MÉTODO: Cento e um pacientes foram alocados aleatoriamente em 4 grupos e submetidos ao BNI nas abordagens infraglútea-parabiceptal ou parassacral, utilizando ropivacaína a 0,5% ou bupivacaína a 0,5% com adrenalina 5 µg.mL-1. Sucesso foi definido como bloqueio sensitivo e motor completo do nervo isquiático 30 minutos após a injeção do AL. Os volumes foram calculados pelo método up-and-down. RESULTADOS: Na abordagem parassacral o volume efetivo médio da ropivacaína foi 17,6 mL (IC 95%: 14,9 - 20,8 e da bupivacaína 16,4 mL (IC 95%: 12,3 - 21,9. Na abordagem infraglútea-parabiceptal o volume efetivo médio da ropivacaína foi 21,8 mL (IC 95%: 18,7 - 25,5 e bupivacaína 20,4 mL (IC 95%: 18,6 - 22,5. Volumes foram significativamente menores (p JUSTIFICATIVA Y OBJETIVOS: El volumen y la masa de las soluciones de anestésico local (AL, influyen en la tasa de éxito de los bloqueos periféricos. Así, el objetivo principal del estudio fue determinar los volúmenes de anestésico local para el bloqueo del nervio isquiático (BNI en los abordajes parasacral e infraglúteoparabicipital. MÉTODO: Ciento y un pacientes se ubicaron aleatoriamente en 4 grupos y fueron sometidos al BNI para los abordajes infraglúteoparabicipital o parasacral, utilizando ropivacaína a 0,5% o bupivacaína a 0,5% con adrenalina 5 µg.mL-1. El éxito se definió como bloqueo sensitivo y motor completo del nervio isquiático 30 minutos después de la inyección del AL. Los volúmenes se calcularon a través del método up-and-down. RESULTADOS: En el abordaje parasacral, el volumen efectivo promedio de la ropivacaína fue de 17,6 mL (IC 95

  17. 数字化口腔修复(6)--应用口内扫描仪精确设计冠边缘位置(附病例报告)%Digital restorative dentistry and prosthodontics (6)---Designing crown margin location accurately by using intraoral scanner (case report)

    Institute of Scientific and Technical Information of China (English)

    骆碧珠; 姚江武

    2016-01-01

    Objective:The purpose of this article was to explore the method of designing crown margin location accu-rately by using CEREC® chair-side computer aided design (CAD). Method:One case restored the anterior teeth defects using CAD/CAM IPS e.max ceramic block was reported and the clinical therapeutic effects were evaluated according to modified United States Public Health Service (USPHS)standard. The changes of free gingival margin of teeth repaired be-fore and after gingival retraction in different times was measured by using CEREC® intraoral scanning. Result:The change of free gingival margin(FGM)became stable after gingival retraction cords were extracted in 30 min and FGM of 11 and 21 shrinked apically in 0.2 mm. The callback results showed that there were no fractures,cleavages and secondary caries oc-curred in the involved teeth,which indicated that clinical index were reached to A class in USPHS. Conclusion:The ideal aesthetic effects can be obtained on the upper anterior teeth defect restored by lithium disilicate glass ceramic using chair-side CAD/CAM,but the long-term follow-up result still had to be further observed. The method of determining crown margin location accurately by using CEREC® chair-side CAD can be applied in the clinics.%目的:探讨CEREC®椅旁计算机辅助设计(computer aided design,CAD)精确地确定冠边缘位置的方法。方法:报告1例采用CAD/CAM IPS e.max瓷块修复前牙(11、21)牙体缺损的病例,按照改良的美国公共卫生署(United States Public Health Service,USPHS)标准评价临床疗效。牙体预备后,通过CEREC®口内扫描仪测量排龈前后游离龈缘(FGM)的变化。结果:取出排龈线30min后,FGM的变化趋于稳定,11和21的FGM分别根向退缩了0.2 mm。各阶段复查结果表明:患牙无折断、劈裂及继发龋等不良现象。临床指标均达到A级标准。结论:二矽酸锂玻璃陶瓷用于前牙牙体缺损的修复可以

  18. Sistemas de liberação controlada com bupivacaína racêmica (S50-R50 e mistura enantiomérica de bupivacaína (S75-R25: efeitos da complexação com ciclodextrinas no bloqueio do nervo ciático em camundongos Sistemas de liberación controlada con bupivacaína racémica (S50-R50 y mescla enantiomérica de bupivacaína (S75-R25: efectos de la complexación con ciclodextrinas en el bloqueo del nervio ciático en ratones Drug-delivery systems for racemic bupivacaine (S50-R50 and bupivacaine enantiomeric mixture (S75-R25: cyclodextrins complexation effects on sciatic nerve blockade in mice

    Directory of Open Access Journals (Sweden)

    Daniele Ribeiro de Araújo

    2005-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Os efeitos adversos associados ao uso de bupivacaína levaram à procura por novos anestésicos locais (AL com perfil de bloqueio semelhante e menos tóxicos, surgindo novas preparações como a mistura enantiomérica de bupivacaína (S75-R25. Os sistemas de liberação controlada, contendo AL em carreadores como ciclodextrinas (CD, têm como objetivo melhorar a eficácia anestésica e o índice terapêutico dessas drogas. Este estudo visou a preparação, a caracterização e a avaliação da eficácia anestésica dos complexos de inclusão da mistura enantiomérica da bupivacaína (S75-R25 e da bupivacaína racêmica (S50-R50 com hidroxipropilb-ciclodextrina (HPb-CD comparando-os com as preparações atualmente utilizadas na clínica. MÉTODO: Os complexos de inclusão foram preparados misturando-se quantidades apropriadas de HPb-CD e S50-R50 ou S75-R25 nas razões molares (1:1 e 1:2 e caracterizados por estudos de solubilidade de fases. Determinaram-se as constantes de afinidade (K de cada AL pela HPb-CD. Os bloqueios motor e sensorial induzidos pelas drogas livres e complexadas foram avaliados, em camundongos, através do bloqueio do nervo ciático. Para a realização dos experimentos, utilizaram-se três concentrações de AL: 0,125%; 0,25% e 0,5%. RESULTADOS: Os estudos de solubilidade indicaram a formação de complexos de inclusão de S50-R50 e S75-R25 com HPb-CD, com valores de constante de afinidade (K similares para os dois anestésicos: 14,7 M-1 (S50-R50:HP-bCD e 14,3 M-1 (S75-R25:HP-bCD. Os testes em animais mostraram que a complexação potencializou o bloqueio nervoso diferencial induzido pelos AL: i a duração do bloqueio motor induzido por S75-R25 foi similar à do S50-R50, mas menos intenso (p JUSTIFICATIVA Y OBJETIVOS: Los efectos adversos asociados al uso de bupivacaína llevaron a la búsqueda por nuevos anestésicos locales (AL con perfil de bloqueo semejante y menos tóxicos, surgiendo nuevas

  19. Analgesia controlada pelo paciente reduz consumo de bupivacaína no bloqueio femoral no tratamento da dor pós-operatória após reconstrução do ligamento cruzado anterior do joelho Analgesia controlada por el paciente reduce consumo de bupivacaína en bloqueo femoral para manejo de dolor postoperatorio en reconstrucción de ligamento cruzado anterior de rodilla Patient controlled analgesia reduces the consumption of bupivacaine in femoral nerve block for the treatment of postoperative pain after reconstruction of anterior cruciate ligament of the knee

    Directory of Open Access Journals (Sweden)

    Victor A. Contreras-Domínguez

    2007-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio femoral contínuo (BFC é utilizado na analgesia pós-operatória das substituições articulares de quadril e joelho com bom resultado. O objetivo deste estudo foi avaliar a utilidade do BFC, comparando três esquemas de administração de bupivacaína após reconstrução do ligamento cruzado anterior (LCA do joelho por artroscopia. MÉTODO: Estudo prospectivo controlado de 90 pacientes estado físico ASA I e II. Os pacientes foram divididos em três grupos: Grupo 1 (n = 30: 10 mL.h-1 em infusão contínua (IC de bupivacaína 0,125% + clonidina 1µg.mL-1 (B + C; Grupo 2 (n = 30: 5 mL.h-1 em IC + 2,5 mL de B + C em PCA a cada 30 min; Grupo 3 (n = 30: 5 mL.h-1 de B + C em PCA cada 30 min. A anestesia foi por via subaracnóidea. A dor pós-operatório foi registrada às 2, 4, 6, 24 e 48 horas após a operação avaliada pela Escala Analógica Visual (VAS. Anotou-se também consumo de bupivacaína e morfina. RESULTADOS: Não foram registradas diferenças nas variáveis demográficas entre ambos os grupos. O VAS pós-operatório entre 2 e 48 horas não mostrou diferenças. O consumo de morfina entre 4 e 48 horas foi similar nos três grupos (p = 0,07. No grupo em que só foi utilizado o modo PCA, o consumo de bupivacaína foi significativamente menor (p JUSTIFICATIVA Y OBJETIVOS: El bloqueo femoral continuo (BFC se utiliza en la analgesia postoperatoria de los reemplazos articulares de cadera y rodilla con buen resultado. El objetivo es evaluar la utilidad del BFC, comparando 3 esquemas de administración de bupivacaína en reconstrucción de ligamento cruzado anterior (LCA de rodilla asistida por artroscopía. MÉTODO: Estudio prospectivo controlado de 90 pacientes estado físico ASA I y II estables. Los pacientes fueron divididos en tres grupos. El Grupo 1 (n = 30: 10 mL.h-1 en infusión continua (IC de bupivacaína 0,125% + clonidina 1µg.mL-1 (B + C; Grupo 2 (n = 30: 5 mL.h-1 en IC + 2,5 mL de B + C en PCA

  20. Tratamiento del rinofima con láser de CO2: Presentación de un caso Treatment of rhinophyma with CO2 laser: A case report

    Directory of Open Access Journals (Sweden)

    J.L. Cebrián Carretero

    2006-04-01

    Full Text Available Introducción. El rinofima es una alteración cutánea de la región nasal que produce problemas estéticos importantes. Describimos nuestra experiencia en un caso de rinofima avanzado y su resolución por medio de una técnica sencilla. Material y métodos. Previa desinfección cutánea se realizó anestesia infiltrativa y bloqueo troncular de nervios infraorbitarios y etmoidales. A continuación se realizó la resección de casi todo el espesor cutáneo con un láser de CO2 Lumenis Sharplan conservando la dermis profunda para permitir la curación por segunda intención. Posteriormente se aplicó vaselina y se realizaron curas y lavados diarios. El paciente fue dado de alta al día siguiente de la intervención. Resultados. Los resultados estéticos fueron muy buenos. El dolor postoperatorio fue controlado con analgesia habitual. En la primera semana se objetivaba un buen grado de cicatrización. A los 2 meses la reepitelización fue completa y ya no se observaban costras ni eritema. Conclusión. La utilización del láser de CO2 en el tratamiento del rinofima avanzado logra unos excelentes resultados estéticos con una morbilidad y riesgo operatorio mínimos.Introduction. Rhinophyma is a skin alteration of the nasal region that causes considerable aesthetic problems. We describe our experience with a case of advanced rhinophyma and its resolution by means of a simple technique. Materials and methods. The skin area was disinfected beforehand, anaesthesia infiltration and the infraorbital and ethmoidal nerve trunks were blocked. Then, using a Lumenis Sharplan CO2 laser almost the complete skin thickness was resected while preserving the deep dermis layer so as to allow second intention healing. Later, Vaseline was applied and the area was treated daily. The patient was discharged the day after the intervention. Results. The aesthetic results were very good. Postoperative pain was controlled with standard analgesics. Adequate healing was

  1. Bloqueios nervosos guiados por ultra-som Bloqueos nerviosos guiados por ultrasonido Ultrasound-guided nerve blocks

    OpenAIRE

    Pablo Escovedo Helayel; Diogo Brüggemann da Conceição; Getúlio Rodrigues de Oliveira Filho

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: As técnicas de bloqueios nervosos guiados por ultra-som são baseadas na visualização direta das estruturas nervosas, da agulha de bloqueio e das estruturas anatômicas adjacentes. Desta maneira, é possível depositar a solução de anestésico local precisamente em torno dos nervos e acompanhar a sua dispersão em tempo real, obtendo-se, assim, um bloqueio mais eficaz, de menor latência, menor dependência de referências anatômicas, menor volume de solução anestésica e mai...

  2. Efectos de la estimulación sensorial sobre la marcha y bloqueos de paciente con Parkinson

    OpenAIRE

    Hernández Noriega, Blanca

    2015-01-01

    Los motivos que conducen a la elección del tema son: primero, el desarrollo de mi profesión como fisioterapeuta en una residencia de mayores. En segundo lugar, el observar algunas dificultades que supone la presencia de la enfermedad de Parkinson entre la población anciana, ya que es una enfermedad degenerativa crónica progresiva con alta prevalencia, y merma la calidad de vida. Hoy en día, debido al envejecimiento de la población, se están investigando cada día más las enfe...

  3. Volume anestésico mínimo para bloqueio retrobulbar extraconal: comparação entre soluções a 0,5% de bupivacaína racêmica, de levobupivacaína e da mistura enantiomérica S75/R25 de bupivacaína Volumen anestésico mínimo para bloqueo retrobulbar extraconal: comparación entre soluciones a 0,5% de bupivacaína racémica, de levobupivacaína y de la mezcla enantiomérica S75/R25 de bupivacaína Minimum anesthetic volumes for extraconal retrobulbar block: comparison between 0.5% racemic bupivacaine, levobupivacaine and enantiomeric mixture S75/R25 bupivacaine

    Directory of Open Access Journals (Sweden)

    Luiz Fernando Soares

    2005-06-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O volume anestésico mínimo (VAM de um anestésico local é o volume efetivo para anestesia regional em 50% dos pacientes. O objetivo deste estudo foi calcular os volumes anestésicos mínimos das soluções a 0,5% de bupivacaína racêmica, de levobupivacaína e da mistura enantiomérica S75/R25 de bupivacaína para anestesia retrobulbar extraconal. MÉTODO: Foram estudadas duas séries de pacientes submetidos à extração de catarata. Na série 1, os pacientes receberam bupivacaína a 0,5% (n = 9 ou levobupivacaína a 0,5% (n = 11. Na série 2, os pacientes receberam bupivacaína racêmica a 0,5% (n = 11 ou a mistura enantiomérica S75/R25 de bupivacaína a 0,5% (n = 10. Os bloqueios foram realizados por injeção única ínfero-lateral. A mobilidade de cada músculo reto foi avaliada após 10 minutos como: 0 (ausente, 1 (diminuída ou 2 (normal. A soma dos escores constituiu o escore total de mobilidade (ETM do globo ocular. O volume inicial foi de 7,4 mL. Os volumes utilizados em pacientes subseqüentes corresponderam 0,1 unidade logarítmica maior (ETM > 2 ou menor (ETM JUSTIFICATIVA Y OBJETIVOS: El volumen anestésico mínimo (VAM de un anestésico local es el volumen efectivo para anestesia regional en un 50% de los pacientes. El objetivo de éste fue calcular los volúmenes anestésicos mínimos de las soluciones a 0,5% de bupivacaína racémica, de levobupivacaína y de la mezcla enantiomérica S75/R25 de bupivacaína para anestesia retrobulbar extraconal. MÉTODO: Fueron estudiadas dos series de pacientes sometidos a extracción de catarata. En la serie 1, los pacientes recibieron bupivacaína a 0,5% (n = 9 ó levobupivacaína a 0,5% (n = 11. En la serie 2, los pacientes recibieron bupivacaína racémica a 0,5% (n = 11 ó la mezcla enantiomérica S75/R25 de bupivacaína a 0,5% (n = 10. Los bloqueos fueron realizados por una inyección única ínfero-lateral. La movilidad de cada músculo recto fue evaluada

  4. Formulation and optimization of fast dissolving intraoral drug delivery system for clobazam using response surface methodology.

    Science.gov (United States)

    Bala, Rajni; Khanna, Sushil; Pawar, Pravin K

    2013-07-01

    Clobazam is a newer 1,5-benzodiazepine used for the treatment of epilepsy. It is better tolerated and less sedating than other benzodiazepines. Absorption of the drug can be impacted by oral fast dissolving dosage form; this may have implications for epilepsy in pediatrics and those having difficulty in swallowing tablets/capsules resulting in improved patient compliance. The purpose of the present investigation was to formulate and optimize clobazam oro-dissolving tablets by direct compression method using response surface methodology (RSM). Oro-dispersible tablets of clobazam were prepared by direct compression method using crospovidone (2-6%) as a superdisintegrant, microcrystalline cellulose (MCC) (20-40%) was used as diluents along with directly compressible mannitol to enhance mouth feel. A 3(2) full factorial design was applied to investigate the combined effect of two formulation variables: amount of crospovidone and MCC over the independent variables disintegration time, wetting time and percent drug release. Disintegration time showed by all formulations was found to be in the range of 24.3-193 s based on evaluation parameters the formulation containing 6% of crospovidone and 30% of MCC showed promising performance against all other formulations. The results demonstrated that the RSM could efficiently be applied for the formulation of clobazam oro-dispersible tablets; therefore, constitute an advance in the management of epileptic attacks. PMID:24083203

  5. Formulation and optimization of fast dissolving intraoral drug delivery system for clobazam using response surface methodology

    Directory of Open Access Journals (Sweden)

    Rajni Bala

    2013-01-01

    Full Text Available Clobazam is a newer 1,5-benzodiazepine used for the treatment of epilepsy. It is better tolerated and less sedating than other benzodiazepines. Absorption of the drug can be impacted by oral fast dissolving dosage form; this may have implications for epilepsy in pediatrics and those having difficulty in swallowing tablets/capsules resulting in improved patient compliance. The purpose of the present investigation was to formulate and optimize clobazam oro-dissolving tablets by direct compression method using response surface methodology (RSM. Oro-dispersible tablets of clobazam were prepared by direct compression method using crospovidone (2-6% as a superdisintegrant, microcrystalline cellulose (MCC (20-40% was used as diluents along with directly compressible mannitol to enhance mouth feel. A 3 2 full factorial design was applied to investigate the combined effect of two formulation variables: amount of crospovidone and MCC over the independent variables disintegration time, wetting time and percent drug release. Disintegration time showed by all formulations was found to be in the range of 24.3-193 s based on evaluation parameters the formulation containing 6% of crospovidone and 30% of MCC showed promising performance against all other formulations. The results demonstrated that the RSM could efficiently be applied for the formulation of clobazam oro-dispersible tablets; therefore, constitute an advance in the management of epileptic attacks.

  6. Formulation and optimization of fast dissolving intraoral drug delivery system for clobazam using response surface methodology

    OpenAIRE

    Rajni Bala; Sushil Khanna; Pawar, Pravin K

    2013-01-01

    Clobazam is a newer 1,5-benzodiazepine used for the treatment of epilepsy. It is better tolerated and less sedating than other benzodiazepines. Absorption of the drug can be impacted by oral fast dissolving dosage form; this may have implications for epilepsy in pediatrics and those having difficulty in swallowing tablets/capsules resulting in improved patient compliance. The purpose of the present investigation was to formulate and optimize clobazam oro-dissolving tablets by direct compressi...

  7. The effect of low-power lasers on intraoral wound healing.

    Science.gov (United States)

    Neiburger, E J

    1995-03-01

    Two types of helium-neon lasers were examined for their effectiveness in increasing the rate of wound healing by biostimulation. The diode helium-neon laser (670 nm) was as effective as the gas helium-neon laser (632 nm) in significantly speeding the rate of healing in rats. Thermal properties of low-power lasers and a controlled clinical case of helium-neon laser treatment of human aphthous stomatitis lesions were reported.

  8. Novel Air Stimulation MR-Device for Intraoral Quantitative Sensory Cold Testing

    Science.gov (United States)

    Brönnimann, Ben; Meier, Michael L.; Hou, Mei-Yin; Parkinson, Charles; Ettlin, Dominik A.

    2016-01-01

    The advent of neuroimaging in dental research provides exciting opportunities for relating excitation of trigeminal neurons to human somatosensory perceptions. Cold air sensitivity is one of the most frequent causes of dental discomfort or pain. Up to date, devices capable of delivering controlled cold air in an MR-environment are unavailable for quantitative sensory testing. This study therefore aimed at constructing and evaluating a novel MR-compatible, computer-controlled cold air stimulation apparatus (CASA) that produces graded air puffs. CASA consisted of a multi-injector air jet delivery system (AJS), a cold exchanger, a cooling agent, and a stimulus application construction. Its feasibility was tested by performing an fMRI stimulation experiment on a single subject experiencing dentine cold sensitivity. The novel device delivered repetitive, stable air stimuli ranging from room temperature (24.5°C ± 2°C) to −35°C, at flow rates between 5 and 17 liters per minute (l/min). These cold air puffs evoked perceptions similar to natural stimuli. Single-subject fMRI-analysis yielded brain activations typically associated with acute pain processing including thalamus, insular and cingulate cortices, somatosensory, cerebellar, and frontal brain regions. Thus, the novel CASA allowed for controlled, repetitive quantitative sensory testing by using air stimuli at graded temperatures (room temperature down to −35°C) while simultaneously recording brain responses. No MR-compatible stimulation device currently exists that is capable of providing non-contact natural-like stimuli at a wide temperature range to tissues in spatially restricted areas such as the mouth. The physical characteristics of this novel device thus holds promise for advancing the field of trigeminal and spinal somatosensory research, namely with respect to comparing therapeutic interventions for dentine hypersensitivity.

  9. Managing Intraoral Lesions in Oral Cancer Patients in a General Dental Practice: An Overview.

    Science.gov (United States)

    Kim, Reuben Han-Kyu; Yang, Paul; Sung, Eric C

    2016-02-01

    As medical technology advances in the area of cancer therapeutics, dental practitioners will encounter patients with active cancer or a history of cancer. Typically, these patients may have had or are undergoing therapies such as surgery, radiation, chemotherapy or a combination of therapies. These patients may present with multiple side effects that dental practitioners can manage or prevent. We discuss some of these concerns and provide management strategies.

  10. PHACES syndrome: Diode laser photocoagulation of intraoral hemangiomas in six young patients

    Directory of Open Access Journals (Sweden)

    Gianfranco Favia

    2015-01-01

    Conclusions: DLP techniques are an effective and minimally invasive procedure for IH in patients with PHACES, in consideration of the multiple lesions to treat, of the necessity of multiple interventions and the higher compliance of the patients.

  11. Plaque-left-behind after brushing : intra-oral reservoir for antibacterial toothpaste ingredients

    NARCIS (Netherlands)

    Otten, Marieke P. T.; Busscher, Henk J.; Abbas, Frank; van der Mei, Henny C.; van Hoogmoed, Chris G.

    2012-01-01

    Plaque is never fully removed by brushing and may act as a reservoir for antibacterial ingredients, contributing to their substantive action. This study investigates the contribution of plaque-left-behind and saliva towards substantivity of three antibacterial toothpastes versus a control paste with

  12. Spatial and Temporal Effects of Capsaicin and Menthol on Intraoral Somatosensory Sensitivity

    DEFF Research Database (Denmark)

    Lu, Shengyi; Baad-Hansen, Lene; Zhang, Zhenting;

    2015-01-01

    AIMS: To assess the spatial and temporal sensory effects of the topical application of capsaicin and menthol on the gingiva of healthy volunteers. METHODS: Capsaicin, menthol, and saline (control) were applied topically on the gingiva in the maxillary premolar area of healthy volunteers for 15...... minutes. Pain intensity was rated on a 0 to 10 visual analog scale (VAS). Before, immediately after, and 30 minutes after application, three mechanical stimuli were applied at 15 gingival sites: fixed-intensity stimuli were applied by 32 mN and 512 mN von Frey filaments, and stimuli of increasing...

  13. Buccinator-based myomucosal flaps in intraoral reconstruction: A review and new classification

    OpenAIRE

    Rahpeyma, Amin; Khajehahmadi, Saeedeh

    2013-01-01

    The buccinator-based myomucosal flaps are axial pattern flaps that are suitable in reconstruction of medium sized oral soft tissue defects; they are rich in blood supply, have appropriate thickness and considerable mucosal paddle, and they can secrete saliva. The present study describes surgical anatomy and blood supply of these flaps and demonstrates all possible modifications of these flaps (9 modifications). Many terms (> 10) have been used to refer to buccinator-based myomucosal flaps in ...

  14. Comment on controlling dental post-operative pain and the intraoral local delivery of drugs.

    Science.gov (United States)

    Hersh, Elliot V; Moore, Paul A

    2015-12-01

    The results of numerous double-blind, placebo-controlled clinical trials consistently demonstrate that nonsteroidal antiinflammatory drugs should be the first line agents in treating postsurgical dental pain. Additive and potential opioid-sparing effects have also been reported in oral surgery pain by combining an optimal dose of an NSAID with acetaminophen 500 mg. While opioid combination drugs are indicated in some dental postsurgical patients, clinicians can no longer ignore the scourge of prescription opioid abuse in the United States. Other potential opioid sparing strategies include the use of locally delivered antimicrobial/antiinflammatory agents such as Bexident Post or extended duration local anesthetic agents such as liposomal bupivacaine placed directly in or in the vicinity of the extraction socket. PMID:26471741

  15. Assessment of the amount of tooth wear on dental casts and intra-oral photographs.

    Science.gov (United States)

    Wetselaar, P; Wetselaar-Glas, M J M; Koutris, M; Visscher, C M; Lobbezoo, F

    2016-08-01

    Tooth wear is a multifactorial condition, leading to the loss of dental hard tissues. Many grading scales are available to assess the amount of tooth wear, one of which is the tooth wear evaluation system (TWES). A grading scale can be used chairside, on casts and on photographs. The aim was to test whether the grading scales of the TWES, used on casts and on photographs, resulted in comparable scores. In addition, it was tested whether these scales can be used to assess tooth wear reliably on photographs. Of 75 tooth wear patients, sets of casts and series of photographs were obtained and graded. Comparison of the grading on casts and on photographs revealed equal median values and percentiles for both occlusal/incisal grading and non-occlusal/non-incisal grading. The grading on casts and on photographs showed a high correlation for the occlusal/incisal grading and a low correlation for the non-occlusal/non-incisal grading (Spearman's rho = 0·74 and rho = 0·47; P ICC = 0·41 to ICC = 0·55) while the intra-examiner reliability was fair-to-good to excellent (ICC = 0·68 to ICC = 0·86) for the occlusal/incisal grading. For the non-occlusal/non-incisal grading, the interexaminer reliability was poor to fair-to-good (ICC = 0·22 to ICC = 0·59), while the intra-examiner reliability was fair-to-good to excellent (ICC = 0·64 to ICC = 0·82). It was concluded that the scores obtained with the grading scales of the TWES on casts and on photographs are comparable. The grading scales can be used in a reliable way on photographs, which is especially the case for occlusal/incisal grading.

  16. Dose distribution and mapping with 3D imaging presentation in intraoral and panoramic examinations

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Hsiu-Ling [Department of Dental Medicine, Mackay Memorial Hospital, Taipei, Taiwan (China); Huang, Yung-Hui [Department of Medical Imaging and Radiological Science, I-Shou University, Kaohsiung, Taiwan (China); Wu, Tung-Hsin, E-mail: tung@ym.edu.tw [Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 112 Taiwan (China); Wang, Shih-Yuan [Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 112 Taiwan (China); Lee, Jason J.S., E-mail: jslee@ym.edu.tw [Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei 112 Taiwan (China)

    2011-10-01

    In current medical imaging applications, high quality images not only provide more diagnostic value for anatomic delineation but also offer functional information for treatment direction. However, this approach would potentially subscribe higher radiation dose in dental radiographies, which has been putatively associated with low-birth-weight during pregnancy, which affects the hypothalamus-pituitary-thyroid axis or thereby directly affects the reproductive organs. The aim of this study was to apply the high resolution 3-D image mapping technique to evaluate radiation doses from the following aspects: (1) verifying operating parameters of dental X-ray units, (2) measuring the leakage radiations and (3) mapping dose with 3-D radiographic imaging to evaluate dose distribution in head and neck regions. From the study results, we found that (1) leakage radiation from X-ray units was about 21.31{+-}15.24 mR/h (<100 mR/h), (2) error of actual tube voltage for 60 kVp setting was from 0.2% to 6.5%, with an average of 2.5% (<7%) and (3) the error of exposure time for a 0.5-1.5 s setting was within 0.7-8.5%, with an average of 7.3% (<10%) error as well. Our 3-D dose mapping demonstrated that dose values were relatively lower in soft tissues and higher in bone surfaces compared with other investigations. Multiple causes could contribute to these variations, including irradiation geometry, image equipment and type of technique applied, etc. From the results, we also observed that larger accumulated doses were presented in certain critical organs, such as salivary gland, thyroid gland and bone marrow. Potential biological affects associated with these findings warrant further investigation.

  17. A Novel Method for Intraoral Access to the Superior Head of the Human Lateral Pterygoid Muscle

    OpenAIRE

    Aleli Tôrres Oliveira; Anderson Aparecido Camilo; Paulo Roberto Valle Bahia; Antonio Carlos Pires Carvalho; Marcos Fabio DosSantos; Jorge Vicente Lopes da Silva; André Antonio Monteiro

    2014-01-01

    Background. The uncoordinated activity of the superior and inferior parts of the lateral pterygoid muscle (LPM) has been suggested to be one of the causes of temporomandibular joint (TMJ) disc displacement. A therapy for this muscle disorder is the injection of botulinum toxin (BTX), of the LPM. However, there is a potential risk of side effects with the injection guide methods currently available. In addition, they do not permit appropriate differentiation between the two bellies of the musc...

  18. Quality assurance protocol for digital intra-oral X ray systems

    International Nuclear Information System (INIS)

    In December 2008, a new Belgian legislation was published that concretizes the necessary tests to be performed to assure the physico-technical quality of dental systems. Tests had been copied from a recently released Belgian protocol for yearly tests on dental systems, as compiled in a working group of the Belgian Hospital Physicists Association (BHPA). The Belgian legislator has copied the basic aims of the BHPA text to ensure appropriate doses and assure image quality of routine dental exposures. In practice, the exposure for the maxillary molar tooth is defined as the 'clinical exposure' and is studied in detail. In the legislation, classical tests of tube output, voltage, filtration and exposure time are imposed. Every test of a digital intra oral x-ray system starts with the measurement of the detector dose for a standard molar setting. The load of tooth and cheek are simulated by a slab of 6mm aluminium. The dose limit is a 200μGy. When the dose exceeds this limit, the medical physics expert (MPE) has to investigate whether the procedures (exposure time, film type, ...) can be adjusted so that the dentist can work within the acceptability criteria. In this report we will focus on 3 less common image quality tests that are also described in the legislation: 1. Dynamic range: A stepwedge, made of 5 aluminium steps with different thickness ranging from 2.5mm to 9mm has to be imaged with the clinical exposure. On the image, the 5 steps should be clearly visible. 2. Homogeneity: An image of a homogeneous test slab is visually inspected. There should not be clinically disturbing artefacts. 3. Resolution: The resolution of clinical exposures is tested with a test object with line pairs on top of 2 cm PMMA. The resolution should not be lower than 5 lp/mm Material and methods: The protocol was successfully tested on 64 systems. This included 13 film systems, 33 systems with phosphorplates and 18 systems with a CCD detector. The systems are from the following vendors: Trophy (19), Kodak (4), Sirona (10), Soredex (8), Gendex (4), Planmeca (9), Philips (3), Satelec (2), Belmont (1), Villa (1), MyRay (1), Morita (1) and Owandy (1)

  19. In vitro comparison of intraoral films and four image plate systems in radiographic caries diagnosis

    OpenAIRE

    Erçalık Yalçınkaya, Şebnem; Künzel, Andreas; Becker, Jürgen

    2012-01-01

    Objectives: Detecting early caries lesion on a radiograph may be a difficult task. The aim of this study was to compare four image plate and two film-based systems by evaluating the accuracy of caries detection under standard conditions. Methods: Two hundred teeth were attached in groups of five onto plastic Lego®blocks. Radiographs were taken from each block under standard bitewing conditions with an X-ray device. Phosphor plates (Dentsply DenOptics®, Dürr Vistascan II®, Soredex Digora FMX®,...

  20. Evaluation of X-Ray Protective Measurements in Intraoral Radiography Equipped Centers in Yazd

    OpenAIRE

    D. Goodarzi Pour; S.Ebrahimi Moghaddam

    2005-01-01

    Statement of Problem: A few decades have past from using radiographic technology as an accurate paraclinical method and always protective measurements is applicated against ionizing radiation. As dentalradiography is a routine procedure in dentistry the importance of protective strategies is clear.Propose: The aim of this descriptive study is to evaluate the protection principles in centers which haveintraoral radiographic devices in Yazd.Material and Methods: We have considered all three asp...

  1. A method for the geometric and densitometric standardization of intraoral radiographs

    Energy Technology Data Exchange (ETDEWEB)

    Duckworth, J.E.; Judy, P.F.; Goodson, J.M.; Socransky, S.S.

    1983-07-01

    The interpretation of dental radiographs for the diagnosis of periodontal disease conditions poses several difficulties. These include the inability to adequately reproduce the projection geometry and optical density of the exposures. In order to improve the ability to extract accurate quantitative information from a radiographic survey of periodontal status, a method was developed which provided for consistent reproduction of both geometric and densitometric exposure parameters. This technique employed vertical bitewing projections in holders customized to individual segments of the dentition. A copper stepwedge was designed to provide densitometric standardization, and wire markers were included to permit measurement of angular variation. In a series of 53 paired radiographs, measurement of alveolar crest heights was found to be reproducible within approximately 0.1 mm. This method provided a full mouth radiographic survey using seven films, each complete with internal standards suitable for computer-based image processing.

  2. Tumour thickness in oral cancer using an intra-oral ultrasound probe

    NARCIS (Netherlands)

    W.L. Lodder; H.J. Teertstra; I.B. Tan; F.A. Pameijer; L.E. Smeele; M.L.F. van Velthuysen; M.W.M. van den Brekel

    2011-01-01

    To investigate tumour-thickness measurement with an intra-operative ultrasound (US) probe. A retrospective data analysis was undertaken for a total of 65 patients with a T1-2 oral cavity cancer, who were seen at a tertiary referral centre between 2004 and 2010. The correspondence between tumour thic

  3. QUALITY OF RADIOGRAPHIC IMAGES: LABORATORY EVALUATION OF INTRAORAL FILMS, FILTERS, COLLIMATORS, AND RADIATION EXPOSURE

    Directory of Open Access Journals (Sweden)

    TAMBURUS José Roberto

    1997-01-01

    Full Text Available In order to evaluate density, radiographic contrast and dose of radiation exposure, the author analyzed 80 radiographs containing 640 optical density data of the images of a penetrometer, exposed to the radiation beam with combinations between D and E periapical films, aluminum and copper/aluminum filters, and circular or rectangular collimators. The data obtained were analyzed by ANOVA and allowed the following conclusions: 1 aluminum filtration resulted in improved image contrast; 2 the use of group D film and an aluminum filter produced improved image contrast quality; 3 the rectangular collimator contributed to the production of improved contrast and to the reduction of radiation exposure, but did not affect density; 4 the combination of copper/aluminum filter, E group film and rectangular collimation significantly reduced radiation exposure.

  4. A Modified Intraoral Resin Mouthguard to Prevent Self-Mutilations in Lesch-Nyhan Patients

    Directory of Open Access Journals (Sweden)

    Giulia Ragazzini

    2014-01-01

    Full Text Available Lesch-Nyhan syndrome, described in 1964 by Lesch and Nyhan, is a X-linked recessive disorder, occurring in 1 : 100000 to 1 : 380000 live births. LNS is characterized by a decrease in activity of hypoxanthine guanine phosphoribosyl transferase, an enzyme involved in purine metabolism, resulting in overproduction of uric acid. Hyperuricemia and neurological features including choreoathetoid spasticity, self-mutilation, and mental retardation clinically characterize this syndrome. In LNS patients the typical feature is loss of tissue from biting themselves with partial or complete amputation of fingers, lips, and tongue. The self-mutilation compares with the eruption of the deciduous teeth. Several drugs trials have been administered to improve self-destructive behavior and invasive treatment approaches, such as extractions of teeth and orthognathic surgery, have been suggested with variable effectiveness. Nowadays prevention is, therefore, the standard of care. The role of dentistry is essential in the management of the self-mutilating behavior, because the teeth represent the main self-injury instrument. This report presents a revision of various therapeutic approaches to manage self-destruction, highlighting the effectiveness of a preventive treatment. It describes a new technique: a resin mouthguard, realized at Gaslini Hospital, to obtain immediate healing of the oral lesions, confirmed in the follow-up period.

  5. MK Versatile spring: A Novel approach for intraoral maxillary molar distalization

    Directory of Open Access Journals (Sweden)

    Manish Kumar Gupta

    2015-01-01

    Full Text Available Molar distalisation is method of choice for gaining space in mild crowding cases as well as non-extraction treatment of patients having Class II Div 1 malocclusion. Through this paper we present a clinical innovation "MK" versatile spring for efficient tooth distalisation and mesialiation by inter-changing the positon of the helices. "MK" spring is made by 0.017΍ × 0.025΍ TMA wire in "M" configuration. It consists of 2 helices, one at the central arm and the other at the arm close to the tooth being mesialized or distalized. The helices are 2 mm in diameter and the length of the arm is 6 mm. The article presents 2 case reports where the effictiveness and efficiency of "MK" spring have been highlighted.

  6. Plaque-left-behind after brushing: intra-oral reservoir for antibacterial toothpaste ingredients

    OpenAIRE

    Otten, Marieke P. T.; Busscher, Henk J.; Abbas, Frank; van der Mei, Henny C.; van Hoogmoed, Chris G.

    2012-01-01

    Objectives Plaque is never fully removed by brushing and may act as a reservoir for antibacterial ingredients, contributing to their substantive action. This study investigates the contribution of plaque-left-behind and saliva towards substantivity of three antibacterial toothpastes versus a control paste without antibacterial claims. Materials and methods First, volunteers brushed 2 weeks with a control or antibacterial toothpaste. Next, plaque and saliva samples were collected 6 and 12 h af...

  7. Evaluation of alternative intra-oral repair techniques for fractured ceramic-fused-to-metal restorations

    NARCIS (Netherlands)

    Ozcan, M

    2003-01-01

    Ceramic fractures are serious and costly problems in dentistry. Moreover, they pose an aesthetic and functional dilemma both for the patient and the dentist. This problem has created demand for the development of practical repair options which do not necessitate the removal and remake of the entire

  8. Progressive systemic sclerosis with intraoral manifestations: A case report and review

    Science.gov (United States)

    Srivastava, Rahul; Jyoti, Bhuvan; Bihari, Manorama; Pradhan, Shobhit

    2016-01-01

    The word scleroderma comes from two Greek words, “sclero” meaning hard and “derma” meaning skin. Scleroderma or progressive systemic sclerosis (PSS), a rare condition, was first characterized as a single condition in 1752 by Curzio of Naples. It generally affects woman between 30 and 50 years of age and has a low prevalence. Scleroderma is a disease of the immune system, blood vessels, and connective tissue. Dermal manifestations include stiff, tight, and shiny skin usually of the hands and feet due to swelling and thickening of the connective tissue as they become fibrotic or scarred. Other symptoms include difficulty in swallowing, bloating, abdominal pain, tiredness, lack of energy, weight loss, aching muscles, joints, and bones. The vital organs that may get involved are lungs, heart, and kidneys. We present a case report of PSS in a 45-year-old female patient with characteristic systemic and oral manifestations. PMID:27433054

  9. Detection method of proximal caries using line profile in digital intra-oral radiography

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Yong Suk; Kim, Gyu Tae; Hwang, Eui Hwan; Lee, Min Ja; Choi, Sam Jin; Park, Hun Kuk [Department of Oral and Maxillofacial Radiology, School of Dentistry and Institute of Oral Biology, Kyung Hee University, Seoul (Korea, Republic of); Park, Jeong Hoon [Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul (Korea, Republic of)

    2009-12-15

    The purpose of this study was to investigate how to detect proximal caries using line profile and validate linear measurements of proximal caries lesions by basic digital manipulation of radiographic images. The X-ray images of control group (15) and caries teeth (15) from patients were used. For each image, the line profile at the proximal caries-susceptible zone was calculated. To evaluate the contrast as a function of line profile to detect proximal caries, a difference coefficient (D) that indicates the relative difference between caries and sound dentin or intact enamel was measured. Mean values of D were 0.0354 {+-} 0.0155 in non-caries and 0.2632 {+-} 0.0982 in caries (p<0.001). The mean values of caries group were higher than non-caries group and there was correlation between proximal dental caries and D. It is demonstrated that the mean value of D from caries group was higher than that of control group. From the result, values of D possess great potentiality as a new detection parameter for proximal dental caries.

  10. Estudio comparativo de la eficacia del bloqueo supraclavicular en la artroscopia de hombro Comparative study of the efficacy of the supraclavicular block for arthroscopic shoulder surgery

    Directory of Open Access Journals (Sweden)

    C. Morales Muñoz

    2010-12-01

    Full Text Available Introducción: Nuestro objetivo es valorar la eficacia de dos técnicas anestésicas en el tratamiento del dolor postoperatorio, así como su influencia en la estancia hospitalaria, tras la cirugía artroscópica de hombro. Material y métodos: Estudio retrospectivo basado en la recogida de datos de las historias de anestesiología y de nuestra unidad de dolor agudo (UDA, durante un período de 6 meses, seleccionando los casos de artroscopias de hombro realizadas y distribuyendo los pacientes en 2 grupos en función de la técnica anestésica empleada. En el grupo I se incluyó a pacientes con anestesia locorregional (bloque interescalénico e interesternocleidomastoideo combinado con anestesia general. En el grupo II se incluyeron los casos de anestesia general con analgesia por vía intravenosa con bolos de fentanilo. Las variables registradas fueron: dolor posoperatorio, tanto en reposo como en movimiento, en las primeras 24h, utilizando una escala verbal simple (EVS, la presencia de efectos secundarios, la necesidad de rescate analgésico y el tiempo quirúrgico empleado. En los casos en que los pacientes fueron dados de alta en las primeras 24h, se realizó una consulta telefónica para valoración de dichas variables. El análisis estadístico se realizó mediante prueba de la t de Student (para variables numéricas y prueba de la χ² (para analizar las relaciones entre variables cualitativas, considerando el estudio estadísticamente significativo si se obtuvo una p0,05. En el grupo de la anestesia combinada el tiempo medio de estancia fue de 36h, frente a las 60h de media en el grupo de anestesia general (pObjectives: Our aim is to evaluate the efficacy of two anesthetic techniques for the treatment of the postoperative pain, as well as their influence on hospital stay, after surgery arthroscopic of shoulder. Materials and methods: Retrospective study based on the collection of data from anesthesia histories and from of our postoperative acute pain unit, during a 6-months period. Cases of shoulder arthroscopies carried out during this period were selected and the patients were distributed in 2 groups depending on the anesthetic technique used: group I consisted of patients treated with locoregional anesthesia (interscalene and inter-sternocleidomastoid block combined with general anesthesia. Group II was general anesthesia cases with intravenous analgesia. The recorded variables were the following: postoperative pain, both at rest and during exercise in the first 24h, using a simple verbal scale (SVS; the presence of side effects, need of analgesic rescue and duration of hospital stay. In the cases where the patients were discharged from hospital in the first 24h, a telephone consultation was carried out for the evaluation of the abovementioned variables. Statistical analysis: Student-t and Chi-square tests. A P.05. In the group of combined anesthesia the average duration of hospital stay was 36h, compared to the 60h average duration in the group of General Anesthesia. (P<.05. Discussion: The blockade of the brachial plexus over the clavicle combined with general anesthesia has shown greater efficacy in the control of perioperative pain, both at rest and during exercise than the general anesthesia with intravenous analgesia. In addition, the incidence of undesirable effects, the need of rescue and the duration of hospital stay were lower in the group of patients with the combined technique, without significant effects on the duration of operating room occupation.

  11. [Infraorbital schwannoma. Case report].

    Science.gov (United States)

    Mora-Ríos, Laura Evelyn; Ríos Y Valles-Valles, Dolores; Flores-Estrada, José Javier; Rodríguez-Reyes, Abelardo Antonio

    2014-01-01

    Antecedentes: el schwannoma infraorbitario es un tumor benigno de la vaina nerviosa periférica compuesto por células de Schwann. Suele aparecer entre los 20 y 70 años de edad, asintomático y producir proptosis progresiva e indolora durante su crecimiento. Caso clínico: paciente masculino de 32 años de edad que ingresó al hospital debido a un tumor no doloroso de crecimiento lentamente progresivo sobre el saco lagrimal izquierdo. A la exploración oftalmológica el tumor era de consistencia ahulada y estaba firmemente adherido a las estructuras vecinas. La transiluminación resultó negativa. El ultrasonido modo B mostró un ojo fáquico y un tumor infraorbitario homogéneo, bien circunstrito, con diámetro mayor de 19.7 mm, sin afectación de la vía lagrimal. El ultrasonido modo A mostró una reflectividad media-alta, con escasa vascularidad interna. La tomografía computada mostró un tumor de densidad homogénea, bien circunscrito a la región anterior y por debajo del globo ocular, sin erosión ósea. El tumor se extirpó mediante una incisión subdérmica. El diagnóstico histopatológico fue: schwannoma infraorbitario. Conclusiones: el schwannoma es un tumor benigno, poco frecuente en la órbita. Su diagnóstico definitivo se establece con base en los hallazgos histopatológicos, como: cápsula verdadera, áreas hiper e hipocelulares, engrosamiento y hialinización de las paredes vasculares. Sin esos hallazgos puede confundirse con tumores fusocelulares benignos. Se informa un nuevo caso de schwannoma infraorbitario y se compara con los casos previamente reportados.

  12. KETIDAK-NYAMANAN DI RONGGA MULUT PADA WANITA MENOPAUSE DAN FAKTOR-FAKTOR INTRAORAL YANG BERPERAN (Studi Pustaka

    Directory of Open Access Journals (Sweden)

    Febrina R Priananto

    2015-08-01

    Full Text Available In menopausal women, there are physiological changes as a consequence of the decrease in secretion of oestrogen and ovary function that produce oestrogen. Numerous metabolic, psychological and physical changes have been associated with this event. In this paper we described oral discomfort in menopausal women. Dentist should know about oral discomfort in menopause including oral dryness, burning sensation, altered taste perception and ulceration, because this symptoms could become a reason for menopausal women to see a dentist. In the management of oral discomfort in menopausal women dentist should collaborate with gynecologist.

  13. Effect of intraoral and subcutaneous morphine on dyspnea at rest in terminal patients with primary lung cancer or lung metastases

    DEFF Research Database (Denmark)

    Gamborg, Helle; Riis, Jette; Christrup, Lona Louring;

    2013-01-01

    Dyspnea is considered as one of the most frequent and distressing symptoms in patients with advanced cancer, and systemic administration of morphine has been reported to have beneficial effect on this complaint.......Dyspnea is considered as one of the most frequent and distressing symptoms in patients with advanced cancer, and systemic administration of morphine has been reported to have beneficial effect on this complaint....

  14. Persistent infection of the chin with an unusual skin pathogen (Streptococcus milleri): a sign of intraoral carcinoma.

    Science.gov (United States)

    Buckley, D A; Murphy, A; Dervan, P; Hone, R; O'Dwyer, T; O'Loughlin, S

    1998-01-01

    Streptococcus milleri is a commensal of the oropharynx and gastrointestinal tract which is not generally associated with skin disease. We now report a patient who presented with a pustular mass of the chin with lower lip anaesthesia. He was initially thought to have sycosis barbae, but response to treatment was poor and lesional swabs repeatedly cultured S. milleri. After some delay, squamous cell carcinoma of the mouth, involving the mandible and overlying skin, was detected. We consider that the S. milleri either invaded through the tumour from the mouth or root canal or colonized the skin from saliva dribbled over the numb lower lip. Isolation of an unusual organism and numbness of the chin are features that should suggest the need for early radiography. PMID:9667108

  15. Submental flap as an alternative to microsurgical flap in intraoral post-oncological reconstruction in the elderly.

    Science.gov (United States)

    Schonauer, Fabrizio; Di Martino, Annalena; Nele, Gisella; Santoro, Mariangela; Dell'Aversana Orabona, Giovanni; Califano, Luigi

    2016-09-01

    Oral and oropharyngeal squamous cell carcinoma (Scc) occur most commonly in middle-aged and elderly individuals. Free flaps are commonly used for reconstruction of extensive tumor resection defects in the oral cavity. Age alone is not an independent variable for increased risk in microvascular reconstruction; however operative time and ASA risk score correlated with medical complications but not with surgical complications. The submental island flap has proven to be a reliable alternative in reconstruction of composite oral cavity defects for its thinness, pliability and versatility in design, shared by the radial forearm free flap, and its advantageous donor site. The submental flap can be easily raised and involves shorter operative time and hospital stay compared to the free-flap procedure. It can be an excellent choice in patients with a high ASA risk score, moreover in elderly patients, where the potential complications linked to microsurgical procedures are avoided. PMID:27255573

  16. Evaluation of alternative intra-oral repair techniques for fractured ceramic-fused-to-metal restorations (Review)

    OpenAIRE

    Özcan, M

    2003-01-01

    Versch. in: Journal of Oral Rehabilitation 2003 30; 194–203 Ceramic fractures are serious and costly problems in dentistry. Moreover, they pose an aesthetic and functional dilemma both for the patient and the dentist. This problem has created demand for the development of practical repair options which do not necessitate the removal and remake of the entire restoration. Published literatureon repair techniques for fractured fixed partial dentures, concentrating on the data obtained both from ...

  17. Development of radiation protection in intraoral dental radiography during the years 2002 -2005 - analysis of postal audits results

    International Nuclear Information System (INIS)

    Results of performed audits have shown that the main problems in the dental radiology are connected with incorrect film processing and non-optimized setting of exposure parameters. Currently , the use of old X-ray machines represents a minor problem, because of their massive replacement. In 2005, 50 % of properly performed audits were satisfactory in all checked parameters. Although diagnostic reference level (DRL) was exceeded in 9 % of the cases in the year 2005, almost 50 % of the workplaces showed problems with a correct and optimized setting of the exposure parameters according to film sensitivity and with film processing. Quality of the whole imaging process depends mainly on the approach of dentists; any significant improvement in this field can not be expected at the moment, as discussed previously . References (authors)

  18. The Effect of Intraoral Suction on Oxygen-Enriched Surgical Environments: A Mechanism for Reducing the Risk of Surgical Fires

    OpenAIRE

    VanCleave, Andrea M.; Jones, James E.; McGlothlin, James D.; Saxen, Mark A.; Sanders, Brian J.; Vinson, LaQuia A.

    2014-01-01

    In this study, a mechanical model was applied in order to replicate potential surgical fire conditions in an oxygen-enriched environment with and without high-volume suction typical for dental surgical applications. During 41 trials, 3 combustion events were measured: an audible pop, a visible flash of light, and full ignition. In at least 11 of 21 trials without suction, all 3 conditions were observed, sometimes with an extent of fire that required early termination of the experimental trial...

  19. Autologous transplantation of oral mucosal epithelial cell sheets cultured on an amniotic membrane substrate for intraoral mucosal defects.

    Directory of Open Access Journals (Sweden)

    Takeshi Amemiya

    Full Text Available The human amniotic membrane (AM is a thin intrauterine placental membrane that is highly biocompatible and possesses anti-inflammatory and anti-scarring properties. Using AM, we developed a novel method for cultivating oral mucosal epithelial cell sheets. We investigated the autologous transplantation of oral mucosal epithelial cells cultured on AM in patients undergoing oral surgeries. We obtained specimens of AM from women undergoing cesarean sections. This study included five patients without any history of a medical disorder who underwent autologous cultured oral epithelial transplantation following oral surgical procedures. Using oral mucosal biopsy specimens obtained from these patients, we cultured oral epithelial cells on an AM carrier. We transplanted the resultant cell sheets onto the oral mucosal defects. Patients were followed-up for at least 12 months after transplantation. After 2-3 weeks of being cultured on AM, epithelial cells were well differentiated and had stratified into five to seven layers. Immunohistochemistry revealed that the cultured cells expressed highly specific mucosal epithelial cell markers and basement membrane proteins. After the surgical procedures, no infection, bleeding, rejection, or sheet detachment occurred at the reconstructed sites, at which new oral mucous membranes were evident. No recurrence was observed in the long-term follow-up, and the postoperative course was excellent. Our results suggest that AM-cultured oral mucosal epithelial cell sheets represent a useful biomaterial and feasible method for oral mucosal reconstruction. However, our primary clinical study only evaluated their effects on a limited number of small oral mucosal defects.

  20. Intra-Oral X-Ray Fluoroscopy With Image Intensifier And CCD. A new imagery for a new dentistry.

    Science.gov (United States)

    Le Denmat, D.; Bonifay, P.; Camus, Jean P.; Bouchier, Guy; Roville, J. C.

    1989-05-01

    At present, many dental acts involve operations carried out without visual monitoring, for example in mouth surgery or during the course of a dental root canal treatment. While this kind of operation is in progress, the dental surgeon is guided by his tactile sense alone. Only the traditional pre and post-operative radiographic examinations are possible. Waiting for a least ten minutes is the time required for these radiographs. This article describes a new material giving the dentist the means of a real time visual monitoring for the intervention being carried out. The device implemented in our laboratory is a dental fluoroscopy set with low level X-ray doses, small field, suitable resolution, and primarily usable for kinetic images acquisition. This dental fluoroscopic device consists of : - a special X-ray generator (low exposure and collimated flow), - a fiber optics bundle and its X-ray / visible converter, - an image intensifier associated to a charge coupled device (CCD), - and finally, a digital processing device for image treatment and display. A preliminary/ dosimetric study completes this work.

  1. Rol de la mitocondria y el estrés oxidativo en el bloqueo del desarrollo de embriones bovinos producidos in vitro Mitochondrial rol and oxidative stress in the developmental blockade of in vitro produced bovine embryos

    OpenAIRE

    AM Tarazona; M Olivera-Angel; YY Lenis

    2010-01-01

    Uno de los mayores obstáculos en la producción de embriones in vitro con fines de investigación básica, comerciales, o de conservación, es el detenimiento temprano del clivaje que ocurre de forma específica en una etapa del desarrollo. Para explicar este fenómeno se han postulado diferentes factores causales como: desórdenes en la cromatina, rearreglos del citoesqueleto, estrés oxidativo y daños mitocondriales. Esta última propuesta ha recibido gran atención, debido a que la mitocondria es fu...

  2. Anterior and posterior tibial anesthetic block in diabetic foot surgery. Bloqueo anestésico tibial anterior y posterior en la cirugía del pie diabético

    OpenAIRE

    Obdulio Rodríguez García; Remberto González Enoa; Evangelina Dávila Cabo; José Julio Ojeda González

    2004-01-01

    Fundament: Diabetes Mellitus is a disease of high and increasing prevalence and its complications follow a parallel course. Its morbidity is derived from its own complications which are produced at a long or short term and peripheral vascular disease hihglights among them.Objective: to check the usefulness of the anterior and posterior blockade of the tibia for the surgery of the diabetic foot. Method: Pros...

  3. "Un nuevo puerto para Buenos Aires". La boca del río Salado como alternativa a los bloqueos portuarios en el Río de la Plata (1830-1850

    Directory of Open Access Journals (Sweden)

    Antonio Galarza

    2014-05-01

    Full Text Available This article presents an analysis of the commerce that took place at the mouth of the Salado River, which was born from the war with the Brazilian Empire (1825-1828 in an alternate port to the one in the provincial capital of Buenos Aires. By delving into sources that have not been explored much by investigations on this subject, we study the various economic activities that took place in this new port—transportation, freight, import, and export— between 1830 and late 1850. Simultaneously, we examine the problems that the need for control over these activities generated for the authorities.

  4. Contribución al análisis del movimiento humano aplicado a la identificación de posturas y bloqueos de la marcha en pacientes con Parkinson

    OpenAIRE

    Rodríguez Martín, Daniel

    2014-01-01

    The following dissertation presents the contributions of the author in the field of human movement analysis and, specifically, in Parkinson's disease. Recent technologies have allowed developing reduced inertial sensors capable of monitoring human movement. This, along with the reduced prices of these inertial sensors, the so-called inertial measurement units, which consists in small devices capable to measure movement by means of inertial sensors, have widely spread. Inertial measurement ...

  5. Bloqueio do nervo frênico após realização de bloqueio do plexo braquial pela via interescalênica: relato de caso A bloqueo del nervio frénico después de la realización de bloqueo del plexo braquial por la vía interescalénica: relato de caso Phrenic nerve block after interscalene brachial plexus block: case report

    OpenAIRE

    Luis Henrique Cangiani; Luis Augusto Edwards Rezende; Armando Giancoli Neto

    2008-01-01

    JUSTIFICATIVA E OBJETIVOS: Bloqueio do nervo frênico é um evento adverso do bloqueio do plexo braquial; entretanto, na sua maioria, sem repercussões clínicas importantes. O objetivo deste relato foi apresentar um caso em que ocorreu bloqueio do nervo frênico, com comprometimento ventilatório, em paciente com insuficiência renal crônica submetido a instalação de fístula arteriovenosa extensa, sob bloqueio do plexo braquial pela via perivascular interescalênica. RELATO DO CASO: Paciente do sexo...

  6. Validity, reliability, and reproducibility of linear measurements on digital models obtained from intraoral and cone-beam computed tomography scans of alginate impressions

    NARCIS (Netherlands)

    Wiranto, Matthew G.; Engelbrecht, W. Petrie; Nolthenius, Heleen E. Tutein; van der Meer, W. Joerd; Ren, Yijin

    2013-01-01

    INTRODUCTION: Digital 3-dimensional models are widely used for orthodontic diagnosis. The aim of this study was to assess the validity, reliability, and reproducibility of digital models obtained from the Lava Chairside Oral scanner (3M ESPE, Seefeld, Germany) and cone-beam computed tomography scans

  7. Enamel Surface Evaluation after Removal of Orthodontic Composite Remnants by Intraoral Sandblasting Technique and Carbide Bur Technique: A Three-Dimensional Surface Profilometry and Scanning Electron Microscopic Study

    OpenAIRE

    Mhatre, Amol C; Tandur, Arundhati P; Reddy, Sumitra S; Karunakara, B C; Baswaraj, H

    2015-01-01

    Background: The purpose of this thesis is to present a practical and efficient clinical method of returning enamel to as near its original condition as possible following removal of bonded orthodontic attachments. The main objective of this study is to evaluate and compare the iatrogenic enamel damage caused by use of two different remnant removal techniques – sandblasting technique and carbide bur technique. Materials and Methods: 40 extracted premolar teeth were selected as sample. Premolar...

  8. Recommendations: Quality control of radiological examinations in dentistry. Dental X-ray instruments for intraoral radiography - controlled components and parameters for operating quality control

    International Nuclear Information System (INIS)

    The following topics are dealt with: List of measuring instruments and tools for radiographic instrumentation testing; Methodology; Glossary of terms; Documentation and data for testing; Radiographic instrumentation (Integrity, equipment and performance of the control and signalling elements, tube voltage, total filtering, tube focus, radiation field size and location, focus-tube end distance, kerma), Imaging system (Photographic film processing, imaging quality-kerma); and Personal protective devices. A master protocol is reproduced in the annex. (P.A.)

  9. The Effects on Absorbed Dose Distribution in Intraoral X-ray Imaging When Using Tube Voltages of 60 and 70 kV for Bitewing Imaging

    OpenAIRE

    Kristina Hellén-Halme; Mats Nilsson

    2013-01-01

    ABSTRACT Objectives Efforts are made in radiographic examinations to obtain the best image quality with the lowest possible absorbed dose to the patient. In dental radiography, the absorbed dose to patients is very low, but exposures are relatively frequent. It has been suggested that frequent low-dose exposures can pose a risk for development of future cancer. It has previously been reported that there was no significant difference in the diagnostic accuracy of approximal carious lesions in ...

  10. Impacto de la radiología digital en la dosis de referencia de radiología intraoral española

    OpenAIRE

    Velasco Hidalgo, Francisco

    2016-01-01

    INTRODUCCION: las dosis de referencia (DRLs) son los niveles de dosis administradas a los pacientes en exposiciones de radiodiagnóstico médico que no deben sobrepasarse y pueden ser utilizados como indicadores en los procesos de optimización radiológica. A raíz de las publicaciones iniciales para reducir las dosis de radiación en los EE.UU. En odontología, se incluyen estas recomendaciones en las directrices europeas sobre protección radiológica en radiología dental; sin embargo, hemos encont...

  11. Prospektive klinische Studie von intraoral gefügtem doppelkronengestützten Zahnersatz : Methodik, Verlässlichkeit und klinische Auswirkungen der definitiven intraoralen Klebung

    OpenAIRE

    Janko, Steffani

    2006-01-01

    Die Vorteile von konuskronengestütztem Zahnersatz für den Patienten sind bekannt: Hoher Trage- und Kaukomfort, bequeme Handhabung, einfache Mundhygiene, Selbstreinigungseffekt durch den Speichel, sekundäre Verblockung durch die Suprakonstruktion, axiale Belastung der Pfeilerzähne, Kombinationsfähigkeit von Implantaten mit natürlichen Pfeilern und prospektive Erweiterungsfähigkeit. Bisher jedoch verhinderten die aufwändige Herstellung und die Problematik der Passungspräzision eine breite Anwen...

  12. Prognostic significance of ploidy and s-phase fraction in primary intraoral squamous cell carcinoma and their corresponding metastatic lymph nodes

    International Nuclear Information System (INIS)

    Depsite improvements in diagnosis and therapy of oral and oro-pharyngeal carcinomas during the past 30 years the 5-year disease-free survival is still poor patients prognosis is affected by cervical lymph node metastasis rather than primary tumors. The DNA ploidy and S-phase fraction (SPF) are associated with tumor aggressiveness and patient outcome in many solid tumors. Analysis of DNA ploidy and SPF in primary oral squamous cell carcinoma (OSCC)and corresponding node metastasis as embedded (FFPE)primary OSCC tumors and their corresponding lymph node metastasis were assessed by flow cytometry (FCM) and correlpronostic markers in relation to conventional prognostic factors and disease-free survival (DFS). ploidy status and SPF (mean value)of 37 formalin-fixed paraffin ated with clinicopthologic parameters and DFS. Most of OSCC tumors (86.5%) were grade II. Among primary OSCC the incidence of aneuploidy was 19%, 51.4% showed high SPF(> 10.62%) and 48.6% had low SPF (< 10.62%). Border line significance (p=0.10) was detected between ploidy status and SPF in primary tumors. In lymph node metastases all tumors were diploid, 78.4% of metastatic tumors revealed low SPF and only 21.6% showed high SPF. There was a statistically significant correlation (P=0.02) between site of tumors and Dfds and a highly statistically significant correlation (p=0.01) between SPF of primary tumors and DFS. conclusion: High SPF of primary OSCC tumors assessed by FCM was significantly associated with decreased disease free survival rats. DNA ploidy Showed no relationship to bad prognostic indicators in either primary OSCC or their metastatic tumors

  13. Influence of surgical treatment and radiotherapy of the advanced intraoral cancers on complete blood count, body mass index, liver enzymes and leukocyte CD64 expression:

    OpenAIRE

    Didanovič, Vojislav; Dovšak, Tadej; Ihan Hren, Nataša; Ihan, Alojz; Kansky, Andrej

    2009-01-01

    Background. The aim of our study was to evaluate the influence of the surgery and radiotherapy of the advanced oral squamous cell carcinoma on the complete blood count, body mass index (BMI), acute inflam-matory response, liver enzymes and expression of the CD64 index on leukocytes in the peripheral blood. Patients and method. Venous blood was obtained from 16 patients with advanced oral squamous cell carcinomas treated with radical surgery and external beam radiotherapy. Blood samples were c...

  14. 口内径路治疗下颌骨巨大囊肿%Intraoral approach to remove large jaw cyst

    Institute of Scientific and Technical Information of China (English)

    李志来; 张振东

    2009-01-01

    目的 探索口内径路摘除下颌骨巨大囊肿的治疗效果.方法 临床经口内作手术切口,治疗10例下颌骨升支-角部和升支-角部-体部的巨大囊肿,通过复诊观察手术效果、囊腔愈合情况以及并发症.结果 10例患者中,9例伤口Ⅰ期愈合,1例磨牙区伤口裂开,但未发生感染,经换药痊愈.结论 口内径路摘除下颌骨囊肿具有方法 简单,创伤小,治疗效果良好,避免颌面部瘢痕和面神经损伤等不足,值得临床应用.

  15. Un caso de cefalea post traumática: consideraciones sobre clasificación, fisiopatología y tratamiento A case of post-traumatic headache: Classification, pathophysiology and treatment

    OpenAIRE

    M.G. Meli

    2010-01-01

    Paciente mujer de 35 años con diagnóstico de cefalea post traumática (CPT) y debut de clínica 3 años antes tras una caída complicada con parada cardiaca. Policontusiones en región frontotemporal derecha. Precisó soporte ventilatorio durante 11 días. Al alta cefalea tensional continua, bilateral. Se le practicaron bloqueos diagnósticos de ramo mediano de facetas cervicales y bloqueos de nervio occipital mayor sin experimentar alivio alguno. Posteriormente se procedió a bloqueo de ganglio estre...

  16. Bloqueio dos nervos femoral e isquiático guiados por ultrassom em paciente anticoagulado: case reports Bloqueo de los nervios femoral e isquiático guiados por ultrasonido en paciente anticoagulado Ultrasound-guided femoral and sciatic nerve blocks in an anticoagulated patient: relato de casos

    OpenAIRE

    Leonardo Henrique Cunha Ferraro; Maria Angela Tardelli; Américo Masafuni Yamashita; José Daniel Braz Cardone; Juliana Midori Kishi

    2010-01-01

    JUSTIFICATIVA E OBJETIVOS: O uso de ultrassom para guiar a punção em bloqueios de nervos periféricos tem-se tornado cada vez mais frequente. Com a menor probabilidade de promover lesões vasculares, o ultrassom torna-se uma ferramenta interessante na realização de bloqueios periféricos, especialmente nos pacientes em uso de anticoagulantes ou com distúrbios da coagulação. O objetivo foi relatar dois casos em que se realizaram os bloqueios isquiático e femoral guiados por ultrassom em pacientes...

  17. Test of micronucleus in lymphocytes with the cytokinesis-block like possible indicator of the answer of the patient to the radiotherapy; Ensayo de micronucleos en linfocitos con bloqueo de la citocinesis como posible indicador de la respuesta del paciente a la radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Giorgio, Marina di; Nasazzi, Nora; Taja, Maria R. [Autoridad Regulatoria Nuclear, Buenos Aires (Argentina); Roth, Berta [Instituto de Oncologia Angel H. Roffo, Buenos Aires (Argentina); Sardi, Mabel; Menendez, Pablo R. [Hospital Italiano, Buenos Aires (Argentina)

    2001-07-01

    In order to evaluate the individual cytogenetic response to radiotherapy and its comparison with the clinical response, the cytokinesis-block micronucleus assay was applied to peripheral blood lymphocytes of patients with cervix cancer undergoing radiotherapy. The cytogenetic data were analysed using a mathematical model to evaluate the attenuation of the cytogenetic effect as a function of the time between a single exposure and blood sampling, estimating a cytogenetic recovery factor (k) that might correlate with the individual radiosensitivity, contributing with radiosensitivity tests of current use but applying a rapid methodology easy to implement in a routine clinical laboratory. Long term clinical observations could confirm the validity of k in expressing predisposition of the subject to develop delayed effects. (author)

  18. Mitogen activated protein kinases blockade improves lipopolysaccharide-induced ileal motor disturbances El bloqueo de las proteínas cinasas activadas por mitógenos mejora las alteraciones motoras inducidas por el lipopolisacárido en íleon

    Directory of Open Access Journals (Sweden)

    Sergio Gonzalo

    2012-06-01

    Full Text Available Background: several diseases such as sepsis can affect the ileum. Lipopolysaccharide (LPS, an endotoxin present in the cell wall of gram negative bacteria, is a causative agent of sepsis. Objectives: the aims of this study were: a to investigate the role of mitogen activated protein kinases (MAPKs in the effect of LPS on the acetylcholine-induced contractions of rabbit ileum; and b to study the localization of MAPKs in the ileum. Material and methods: ileal contractility was studied in an organ bath and MAPKs were localized by immunohistochemistry. Results: acetylcholine-induced contractions decreased with LPS. SB203580, SP600125 and U0126 blocked the effect of LPS on the acetylcholine-induced contractions. Phosphorylated p38 and ERK were detected in neurons of myenteric plexus and phosphorylated p38 and JNK in smooth muscle cells of ileum. Conclusion: we can suggest that p38, JNK, and ERK MAPKs are involved in the mechanism of action of LPS in the ileum.Introducción: varias enfermedades como la sepsis pueden afectar al íleon. El lipopolisacárido (LPS, una endotoxina presente en la pared celular de las bacterias gram-negativas, es un agente causal de la sepsis. Objetivos: los objetivos del presente estudio fueron: a investigar el papel de las proteína cinasas activadas por mitógenos (MAPKs en los efectos del LPS en las contracciones inducidas por acetilcolina en el íleon de conejo; y b estudiar la localización de las MAPKs en el íleon. Material y métodos: la contractilidad ileal se estudió en un baño de órganos y las MAPKs se localizaron mediante inmunohistoquímica. Resultados: el LPS disminuyó las contracciones inducidas por acetilcolina. El SB203580, el SP600125 y el U0126 bloquearon los efectos del LPS sobre las contracciones inducidas por acetilcolina. La p38 y la ERK fosforiladas se detectaron en las neuronas del plexo mientérico y la p38 y la JNK fosforiladas en las células del músculo liso del íleon. Conclusión: concluimos que la p38, la JNK y la ERK MAPKs parecen estar involucradas en el mecanismo de acción del LPS en el íleon.

  19. Estudo clínico da eficácia do bloqueio anestésico radicular transforaminal no tratamento da radiculopatia lombar Estudio clínico de la eficacia del bloqueo anestésico radicular transforaminal en el tratamiento de la radiculopatía lumbar Clinical study on the efficacy of transforaminal radicular block in lumbar radiculopathy treatment

    Directory of Open Access Journals (Sweden)

    Fabiano Fonseca Rodrigues de Souza

    2011-01-01

    Full Text Available OBJETIVO: O objetivo deste estudo é avaliar a eficácia da injeção transforaminal nos pacientes com dor radicular devido à hérnia de disco ou estenose foraminal lombar por meio de estudo prospectivo randomizado. MÉTODOS: Foram avaliados 61 pacientes com quadro de radiculopatia nos membros inferiores. Esses pacientes foram divididos em dois grupos escolhidos aleatoriamente. Desses, 32 foram submetidos à injeção de corticosteroides e 29 foram submetidos à injeção salina. O período de acompanhamento foi de 12 meses. Para avaliar os resultados aplicamos a Escala Analógica Visual de Dor (EAV e o Índice Oswestry (ODI. RESULTADOS: Houve melhora significativa da intensidade de dor (p OBJETIVO: El presente estudio tuvo como objetivo evaluar la eficacia de la inyección transforaminal en pacientes con dolor radicular, debido a la hernia discal lumbar o estenosis foraminal, mediante un estudio prospectivo y aleatorizado. MÉTODOS: Se analizó un total de 61 pacientes con cuadro de radiculopatía en miembros inferiores. Estos pacientes fueron divididos en dos grupos seleccionados al azar. De ellos, 31 fueron sometidos a inyecciones de corticoides y a 29 se les aplicaron inyecciones de suero fisiológico. El período de seguimiento fue de 12 meses. Para evaluar los resultados se les aplicó la Escala Visual Analógica del dolor (EAV y el Índice de Oswestry (ODI, sigla en inglés. RESULTADOS: Hubo una mejora significativa en la intensidad del dolor (p OBJECTIVE: To assess the efficacy of corticosteroid injections in patients with sciatica due to lumbar disc herniation or lumbar foraminal stenosis by a prospective randomized study. METHODS: There were analyzed 61 patients with sciatica due to lumbar disc degeneration. These patients were divided into two groups randomly chosen to radicular blocks with saline solution or corticosteroids. Thirty-one of these patients were submitted to corticosteroids radicular block and 29 patients were submitted to saline solution radicular block with a follow-up of 12 months. Outcomes were evaluated by visual analogue scale (VAS and Oswestry disability index (ODI. RESULTS: Statistical analysis showed improvement in pain reduction (p < 0.001 in the first week on ODI and VAS in the group with corticosteroid radicular block in comparison to the group with saline solution; however no statistical differences were observed after three months of follow-up. The transforaminal root block presents a good method for treatment of acute sciatica and showed no improvement in a long-term-follow-up. CONCLUSION: Transforaminal root block is an excellent method with high evidence to treat sciatica in short-term follow-up, but for long-term (more than six months follow-up is just moderate.

  20. Bloqueio do plexo braquial por via supraclavicular: estudo clínico comparativo entre bupivacaína e levobupivacaína Bloqueo del plexo braquial por vía supraclavicular: estudio clínico comparativo entre bupivacaína y levobupivacaína Supraclavicular brachial plexus block: a comparative clinical study between bupivacaine and levobupivacaine

    OpenAIRE

    José Ricardo Pinotti Pedro; Lígia Andrade Silva Telles Mathias; Judymara Lauzi Gozzani; Flavia Salles de Souza Pinotti Pedro; José Carlos Rittes

    2009-01-01

    JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo braquial é técnica anestésica utilizada para procedimentos em membros superiores. O plexo braquial é território potencial para absorção de anestésicos locais. Estudos dos estereoisômeros da bupivacaína vêm demonstrando menor potencial de toxicidade da fração levógira (levobupivacaína) sobre o sistema cardiovascular. Porém, é discutida a eficácia anestésica (bloqueio sensitivo e motor) da levobupivacaína em anestesia do neuroeixo. Este estudo visa...

  1. Bases anatômicas para o bloqueio anestésico do plexo braquial por via infraclavicular Bases anatómicas para el bloqueo anestésico del plexo braquial por vía infraclavicular Anatomical basis for infraclavicular brachial plexus block

    OpenAIRE

    Luiz Carlos Buarque Gusmão; Jacqueline Silva Brito Lima; José Carlos Prates

    2002-01-01

    JUSTIFICATIVA E OBJETIVOS: Procuramos demonstrar neste estudo a presença constante da fossa infraclavicular, com a finalidade de sua utilização como via de acesso para o bloqueio anestésico do plexo braquial por via infraclavicular. Visando solucionar o ponto onde os fascículos do plexo braquial podem ser localizados no interior da fossa, propusemos medidas a partir da face anterior da clavícula e do ângulo formado pelo encontro do músculo deltóide com a clavícula (ângulo deltoclavicular). A ...

  2. Bloqueio do plexo braquial, por via infraclavicular vertical, em paciente com doença pulmonar obstrutiva crônica: relato de caso Bloqueo del plexo braquial, por vía infraclavicular vertical, en paciente con enfermedad pulmonar obstructiva crónica: relato de caso Infraclavicular vertical brachial plexus blockade in patients with chronic obstructive pulmonary disease: case report

    OpenAIRE

    Diogo Brüggemann da Conceição; Pablo Escovedo Helayel; Fernanda Cecato

    2006-01-01

    JUSTIFICATIVA E OBJETIVOS: Os pacientes com doença pulmonar obstrutiva crônica (DPOC) têm risco aumentado de complicações pós-operatórias, sobretudo quando submetidos à anestesia geral. O bloqueio do plexo braquial representa uma alternativa para estes pacientes em intervenções cirúrgicas de membros superiores. O objetivo deste relato foi apresentar um caso de bloqueio do plexo braquial, por via infraclavicular vertical em paciente com DPOC com fratura de cotovelo. RELATO DO CASO: Paciente do...

  3. Bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5% Bloqueo del plexo braquial por la vía posterior con el uso de neuroestimulador y ropivacaína a 0,5% Posterior brachial plexus block with nerve stimulator and 0.5% ropivacaine

    OpenAIRE

    Lúcia Beato; Gustavo Camocardi; Luiz Eduardo Imbelloni

    2005-01-01

    JUSTIFICATIVA E OBJETIVOS: Existem várias maneiras de abordar o plexo braquial dependendo da experiência do anestesiologista e da região a ser operada. O bloqueio do plexo braquial pela via posterior pode representar uma alternativa para cirurgias de ombro, clavícula e úmero proximal. O objetivo deste estudo foi mostrar os resultados observados em pacientes submetidos a bloqueio do plexo braquial pela via posterior com uso de neuroestimulador e ropivacaína a 0,5%. MÉTODO: Vinte e dois pacient...

  4. Bloqueio do plexo braquial por via interescalênica: efeitos sobre a função pulmonar Bloqueo del plexo braquial por vía interescalénica: efectos sobre la función pulmonar Interscalene brachial plexus block: effects on pulmonary function

    OpenAIRE

    Alexandre Hortense; Marcelo Vaz Perez; Jose Luis Gomes do Amaral; Ana Cristina Martins de Vasconcelos Oshiro; Heloisa Baccaro Rossetti

    2010-01-01

    JUSTIFICATIVA E OBJETIVOS: A via interescalênica é um dos acessos mais comumente utilizados no bloqueio do plexo braquial. Todavia, tem-se demonstrado associação dessa técnica com o bloqueio do nervo frênico ipsilateral. A disfunção diafragmática daí resultante provoca alterações na mecânica pulmonar, potencialmente deletérias em pacientes com limitação da reserva ventilatória. O objetivo do estudo foi avaliar a repercussão do bloqueio interescalênico sobre a função pulmonar por meio da medid...

  5. Estudo comparativo entre ultrassom e neuroestimulação no bloqueio do plexo braquial pela via axilar Estudio comparativo entre ultrasonido y neuroestimulación en el bloqueo del plexo braquial por la vía axilar A comparative study between ultrasound and neurostimulation guided axillary brachial plexus block

    OpenAIRE

    Diogo Brüggemann da Conceição; Pablo Escovedo Helayel; Getúlio Rodrigues de Oliveira Filho

    2009-01-01

    JUSTIFICATIVA E OBJETIVOS: O uso do ultrassom em Anestesia Regional vem crescendo. Existem poucos estudos comparando o uso do ultrassom com a neuroestimulação. O objetivo deste estudo foi comparar a execução do bloqueio do plexo braquial pela via axilar guiado por neuroestimulação com dupla injeção e guiado por ultrassonografia em procedimentos cirúrgicos na mão. Para isto, foram comparados o tempo de realização, a taxa de sucesso e complicações. MÉTODO: Após a aprovação do Comitê de Ética em...

  6. Mitogen activated protein kinases blockade improves lipopolysaccharide-induced ileal motor disturbances El bloqueo de las proteínas cinasas activadas por mitógenos mejora las alteraciones motoras inducidas por el lipopolisacárido en íleon

    OpenAIRE

    Sergio Gonzalo; Laura Grasa; Ligia Verónica Hernández; María Pilar Arruebo; Miguel Ángel Plaza; María Divina Murillo

    2012-01-01

    Background: several diseases such as sepsis can affect the ileum. Lipopolysaccharide (LPS), an endotoxin present in the cell wall of gram negative bacteria, is a causative agent of sepsis. Objectives: the aims of this study were: a) to investigate the role of mitogen activated protein kinases (MAPKs) in the effect of LPS on the acetylcholine-induced contractions of rabbit ileum; and b) to study the localization of MAPKs in the ileum. Material and methods: ileal contractility was studied in an...

  7. Síndrome de Tako-Tsubo em decorrência de bloqueio neuromuscular residual: relato de caso Síndrome de Tako-Tsubo como consecuencia de bloqueo neuromuscular residual: relato de caso Tako-Tsubo syndrome secondary to residual neuromuscular blockade: case report

    OpenAIRE

    Marcos Guilherme Cunha Cruvinel; Fabiano Soares Carneiro; Roberto Cardoso Bessa Junior; Yerkes Pereira e Silva; Mirna Bastos Marques

    2008-01-01

    JUSTIFICATIVA E OBJETIVOS: A síndrome de Tako-Tsubo é uma complicação pós-operatória rara, com mortalidade em torno de 5%. O objetivo deste relato é apresentar o bloqueio neuromuscular residual como fator desencadeante da referida síndrome, discutir sobre a mesma e alertar sobre o bloqueio neuromuscular residual. RELATO DO CASO: Paciente do sexo feminino, 61 anos, estado físico ASA I, submetida à anestesia geral associada a bloqueio paravertebral cervical para reparo artroscópico de lesão de ...

  8. Bloqueio bilateral do nervo pudendo para hemorroidectomia em paciente acondroplásico: relato de caso Bloqueo bilateral del nervio pudendo para hemorroidectomía en paciente acondroplásico: relato de caso Bilateral blockade of the pudend nerve to hemorrhoidectomy in achondroplasic patient: case report

    OpenAIRE

    Bruno Salomé de Morais; Marcos Guilherme Cunha Cruvinel; Yerkes Pereira Silva; Dener Augusto Diniz; Carlos Henrique Viana de Castro

    2006-01-01

    JUSTIFICATIVA E OBJETIVOS: O nanismo acondroplásico ou acondroplasia é a forma mais comum de nanismo e ocorre na maioria dos casos por alteração genética espontânea. A anestesia desses pacientes apresenta várias particularidades. O objetivo do presente relato foi descrever um caso de paciente acondroplásico, com história prévia de intervenção cirúrgica da coluna para descompressão medular, submetido a hemorroidectomia através de bloqueio bilateral dos nervos pudendos. RELATO DO CASO: Paciente...

  9. Influence on flux density of intraoral dental magnets during 1.5 and 3.0 Tesla MRI; Beeinflussung der Flussdichte intraoraler Dentalmagnete im 1,5 und 3 Tesla-MRT

    Energy Technology Data Exchange (ETDEWEB)

    Blankenstein, F.H.; Peroz, I. [Charite, Berlin (Germany). Charite Centrum 3 - Zahn-, Mund- und Kieferheilkunde; Truong, B. [Zahnarztpraxis Berlin (Germany); Thomas, A. [Charite, Berlin (Germany). Charite Centrum 6 - Diagnostische und Interventionelle Radiologie und Nuklearmedizin; Boeckler, A. [Halle-Wittenberg Univ. (Germany). Zentrum fuer Zahn-, Mund- und Kieferheilkunde

    2011-08-15

    Purpose: When using dental duo-magnet systems, a mini-magnet remains in the jaw after removal of the prosthesis. In some cases, implant-borne magnets may be removed, whereas tooth-borne magnets are irreversibly fixed on a natural tooth root. The goal of this paper is to identify the impacts of the duration and orientation of exposure on these magnets in a 1.5 or 3 Tesla MRI. Materials and Methods: For this study, 30 SmCo and 60 NdFeB magnets were used. During the first experiment, they were exposed with free orientation for 64 minutes. During the second experiment, the magnets were fixed in position and exposed at 1.5 and 3 Tesla while aligned in a parallel or antiparallel direction. Results: While the duration of exposure in MRI is irrelevant, the orientation is not. The coercive field strength of these NdFeB and SmCo alloys is not sufficient to reliably withstand demagnetization in a 1.5 or 3 T MRI when aligned in an antiparallel direction. At 1.5 T neodymium magnets were reduced to approx. 34 % and samarium magnets to approx. 92 % of their initial values. At 3 T all magnets were reversed. Conclusion: As a precaution, the worst-case scenario, i.e. an antiparallel orientation, should be assumed when using a duo-magnet system. If an MRI can be postponed, the general dentist should remove implant-borne magnets. If there is a vital indication, irreversible damage to the magnets is acceptable in consultation with the patient since the replacement costs are irrelevant given the underlying disease. (orig.)

  10. Intraoral Clearance Rate and Lactic Acid Production of Different Foods Containing Various Carbohydrates%各种碳水化合物口腔清除率及乳酸产量的研究

    Institute of Scientific and Technical Information of China (English)

    张萍; 李文; 张玉; 周松华

    2002-01-01

    目的观察进食各种碳水化合物后,120min内唾液乳酸和葡萄糖的变化,为龋病的预防和口腔宣教提供依据.方法采用高效液相色谱技术和Roche葡萄糖自动测定技术对人体摄入六种食物后口腔内酸产量和食物清除率的变化进行观察.结果 30min后乳酸量为:葡萄干>巧克力>方糖>果冻>面包>土豆片.120min后顺序明显改变为:土豆片>果冻>方糖>巧克力>面包>葡萄干.结论食物的"粘性"对在口腔内产酸的滞留时间有很大的影响,含淀粉量越大,滞留时间越长.

  11. Comparative experimental investigations on the demonstration by X-ray of defects of the apices of teeth in individual intraoral pictures and panorama layer pictures (orthopantomograph 3 and 5)

    International Nuclear Information System (INIS)

    The present work was to show by means of experimentally applied bone defects in the spongiosa and cortical substance in how far such bone losses near the apex of a tooth can be detected by X-ray in individual pictures taken using the right-angle technique and in orthopantomograms. In 12 macerated human lower jaws a total of 120 defects restricted to the corticalis with diameters of 1-2 mm, as well as 166 lesions located at the apex with diameters of 1.6-2.9 mm were applied in different positions with regard to the apex. The teeth belonged to different dental groups. In each case identical individual pictures according to the right-angle technique described by Hielscher and pictures with an orthopantomograph 3 were taken. As a result, the probability of detecting defects in caudal, lingual and vestibular position to the apex with diameters of 1.6-2.9 mm was found to be of 41% with individual pictures taken and of 23% with pictures taken using an orthopantomograph 3. The probility of detecting such defects by X-ray was found to increase along with their diameter for both methods. (orig./MG)

  12. 下颌骨巨大囊肿口内进路手术与开窗减压术的比较%Comparison of intraoral approach operation and fenestration decompression in the treatment of large jaw cyst

    Institute of Scientific and Technical Information of China (English)

    代全红; 高银亮

    2012-01-01

    目的 通过口内进路手术与开窗减压术治疗下颌骨巨大囊肿,探索口内进路手术与开窗减压术在下颌骨保存性功能外科中的应用价值.方法 回顾2005年1月~2010年6月驻马店市中心医院口腔科治疗的31例下颌骨巨大囊肿患者,比较口内进路手术及开窗减压术后患者恢复的情况及X线变化,定期复查,评价两种术式的临床效果.结果 经过6~21个月的追踪观察,行口内进路手术的14例患者中1例因术前已有感染迹象,术后引流口处持续流脓,经多次换药效果不理想,最后行病变颌骨切除+自体肋骨移植术.另2例引流口不愈合,但骨质愈合良好,行二期刮治术后I期愈合.开窗减压术17例的患者经局部换药或配合局部刮治处理分别在6~21个月内愈合.结论 经统计学处理,开窗减压与口内进路手术均是治疗下颌骨巨大囊肿的有效方法.

  13. 二维根尖周片与锥形束CT成像在牙周病理诊断中的运用比较%Detection of periodontal bone loss using cone beam CT and intraoral radiography

    Institute of Scientific and Technical Information of China (English)

    任迅

    2014-01-01

    目的:比较根尖周片与锥形束CT(Cone beam CT,CBCT)成像在牙周骨丧失中的检测与定位作用。方法:图像选自需进行牙周评价的患者牙片,样本共计51个测量位点,包括水平和垂直骨丧失,分别由三名检测者进行评价,主要通过测量骨丧失的线性高度、深度和宽度以及对X射线断层片上的联合骨缺损进行识别鉴定。结果:两种成像方式在定性骨缺损上差异无统计学意义(P>0.05),但在测量釉牙骨质界(CEJ)和牙槽脊顶(AC)间距离时两种成像方式差异有统计学意义(P0.05)。在本研究的39颗牙中,30.8%有联合骨缺损。结论:两种测量方式在测量牙槽脊的高度时有差异,但在测量骨缺失的深度和宽度时结论相似。应用CBCT 成像方式能对颊侧和舌侧/腭侧进行全面分析,并对骨缺失的表面形态进行观察。%To compare periapical radiographs with cone beam CT(CBCT) imaging in detecting and localizing alveolar bone loss by comparing linear measurements of the height, depth and width of the defects and identifying combined bone defects in tomographic images. Methods: The images were selected from a secondary database containing images of patients referred for periodontal evaluation. The sample consisted of 51 sites showing both horizontal and vertical bone loss, assessed by 3 trained examiners. Results: The results showed that there were no statisticaly significant differences between the imaging methods in terms of identification of the patern of bone loss. However, there were differences between the two methods when the distance between the cemento-enamel junction (CEJ) and the alveolar crest (AC) was measured. When the distance between the CEJ and the deepest point and width of the defect were measured, the methods showed no statisticaly significant difference. In this study, 30.8% of the 39 teeth evaluated had combined bone defects. Conclusions: The two methods differ when detecting the height of the alveolar bone crest but present similar views of the depth and width of bone defects. CBCT was the only method that alowed for an analysis of the buccal and lingual/palatal surfaces and an improved visualization of the morphology of the defect.

  14. Tachycardia-dependent bilateral bundle branch block in ischemic heart disease with systolic dysfunction: case report and review of prognostic implications

    Directory of Open Access Journals (Sweden)

    Federico Ferrando-Castagnetto

    2015-10-01

    Full Text Available Una caracterización correcta de los bloqueos de rama dependientes de frecuencia, puede proporcionar información relevante en ciertas situaciones clínicas. A menudo, este evento fisiológico puede evidenciar la presencia de un daño extenso del sistema de conducción infrahisiano con riesgo elevado de bloqueo aurículo-ventricular avanzado y necesidad de implante de marcapasos. Describimos el caso de un hombre de 62 años con cardiopatía isquémica crónica, que exhibió un bloqueo de rama bilateral alternante taquicardia-dependiente durante el esfuerzo ergométrico, discutiendo las principales implicancias pronósticas de este evento inusual en el contexto de la disfunción sistólica.

  15. Valoración a largo plazo de los resultados de tratamiento mediante osteosíntesis con miniplacas en sus diferentes usos en cirugía craneomaxilofacial

    OpenAIRE

    Marí Roig, Antonio

    2003-01-01

    [spa] Después de la introducción de la osteosíntesis con miniplacas hace más de 25 años, siguen existiendo controversias en su aplicación en determinadas situaciones de la cirugía craneomaxilofacial. En las fracturas mandibulares se utilizan diferentes tipos de placas asociadas o no a bloqueo intermaxilar con un indice de complicaciones muy variable (James y col, 1981; Limchayseng 1988); el tratamiento más adecuado cuando existen dientes en el foco de fractura. La utilización del bloqueo inte...

  16. Modelado del efecto eléctrico de los fármacos voltaje-dependientes en las células ventriculares de corazón: nuevo marco teórico

    OpenAIRE

    GISBERT ROCA, FERNANDO

    2016-01-01

    [ES] El primer objetivo del programa es aplicar un nuevo modelo de estimación del factor de bloqueo de una corriente iónica que se ha desarrollado para tener en cuenta su dependencia con el voltaje en el caso del uso de un fármaco voltaje-dependiente. Este nuevo modelo busca, por un lado, mejorar el método convencional que no tiene en cuenta la dependencia del factor de bloqueo con el voltaje, y, por otro, presentar un coste computacional menor que el de los modelos de Markov. ...

  17. Acciones bloqueantes alrededor de los setenta grados oeste en el sur de Sudamérica Blocking action arround seventy degrees West in the South of South America

    OpenAIRE

    Adelia P. Alessandro

    2005-01-01

    Se caracterizan las situaciones sinópticas que producen bloqueos en los alrededores de 70º O en el sur de Sud América. Estos eventos se discriminan entre los que se inician al este y los que se inician al oeste de dicha longitud. A través de la metodología objetiva del análisis por Componentes Principales se determinan cuatro modelos diferentes, tres de ellos representan a los bloqueos sobre el sur del Pacífico Este y uno a los del sur del Atlántico Oeste. La posición media de la alta semiper...

  18. Relación entre daño mitocondrial y producción de H2O2 en embriones bovinos producidos in vitro con alto y bajo potencial de desarrollo

    OpenAIRE

    Marlene Jiménez; Carlos Vélez; Martha Olivera Angel; César Serrano

    2001-01-01

    Los embriones producidos in vitro (EPIV) presentan bloqueo en el
    desarrollo en el momento de la activación del genoma (8-16 células en bovinos), limitando la producción de blastocitos (35%). Este fenómeno ha sido relacionado con la producción de Especies Reactivas de Oxígeno (ERO). Entre las fuentes de ERO se han descrito altas tensiones de oxígeno, exposición a la luz y alteración del metabolismo oxidativo (1). Los EPIV con baja competencia para superar el bloqueo present...

  19. Aprender lo justo, pero no más

    OpenAIRE

    Miguel A. Vadillo

    2012-01-01

    Un importante reto de la psicología cognitiva es entender cómo aprendemos a ignorar información redundante y a codificar sólo la información imprescindible. En el ámbito de la psicología del aprendizaje, pocos fenómenos nos han dado tanta información sobre el carácter selectivo del aprendizaje como el efecto de bloqueo, ampliamente investigado en todo tipo de preparaciones experimentales con animales y humanos. Cuatro décadas después de los primeros estudios sobre este fenómeno, el bloqueo co...

  20. Influência do lítio no bloqueio neuromuscular produzido pelo atracúrio e pelo cisatracúrio: estudo em preparações nervo frênico-diafragma de rato Influencia del litio en el bloqueo neuromuscular producido por el atracurio y por el cisatracurio: estudio en preparo nervio frénico-diafragma del ratón Influence of lithium on the neuromuscular blockade produced by atracurium and cisatracurium: study on rat phrenic nerve-diaphragm preparations

    OpenAIRE

    Samanta Cristina Antoniassi Fernandes; Angélica de Fátima de Assunção Braga; Franklin Sarmento da Silva Braga; Yolanda Christina S. Loyola; Silmara Rodrigues de Souza; Caroline Coutinho de Barcelos

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: O lítio, fármaco amplamente utilizado nos distúrbios bipolares, pode interagir com os bloqueadores neuromusculares. Os mecanismos para explicar os seus efeitos na transmissão neuromuscular e a interação com bloqueadores neuromusculares são controversos. O objetivo deste trabalho foi avaliar, em diafragma de rato, os efeitos do lítio sobre a resposta muscular à estimulação indireta e a possível interação com os bloqueadores neuromusculares. MÉTODO: Utilizaram-se rato...

  1. Bloqueio isquiático-femoral guiado por ultra-som para revisão de coto de amputação: relato de caso Bloqueo isquiático-femoral guiado por ultrasonido para revisión de muñón de amputación: relato de caso Ultrasound-guided sciatic-femoral block for revision of the amputation stump: case report

    OpenAIRE

    Pablo Escovedo Helayel; Diogo Bruggemann da Conceição; Carla Feix; Gustavo Luchi Boos; Bruno Schroder Nascimento; Getúlio Rodrigues de Oliveira Filho

    2008-01-01

    JUSTIFICATIVA E OBJETIVOS: O emprego da ultra-sonografia na anestesia regional vem se tornando cada vez mais difundido pelo seu papel facilitador e pela sua eficácia. A visualização direta por meio da ultra-sonografia permite que se identifiquem os nervos periféricos, independentemente da capacidade de se obter estimulação sensitiva ou motora. RELATO DO CASO: Paciente submetido à revisão de coto de amputação no nível do joelho sob bloqueio isquiático-femoral guiado por ultra-som com 40 mL de ...

  2. Estudo comparativo entre clonidina associada à bupivacaína e bupivacaína isolada em bloqueio de plexo cervical para endarterectomia de carótida Estudio comparativo entre la clonidina asociada a la bupivacaína y la bupivacaína aislada en bloqueo de plexo cervical para endarterectomía de carótida A comparative study between bupivacaine and clonidine associated with bupivacaine in cervical plexus block for carotid endarterectomy

    OpenAIRE

    Walter Pinto Neto; Adriana Machado Issy; Rioko Kimiko Sakata

    2009-01-01

    JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo cervical permite avaliação neurológica durante a endarterctomia, além de manter analgesia pós-operatória. A clonidina é agonista alfa2 com efeito analgésico em diferentes bloqueios. O objetivo deste estudo foi comparar o efeito analgésico da clonidina com bupivacaína em relação à bupivacaína isolada em bloqueio de plexo cervical. MÉTODO: Foram avaliados 30 pacientes de forma aleatória e duplamente-encoberta divididos em dois grupos: G1 recebeu 1,...

  3. Prevalência de paralisia diafragmática após bloqueio de plexo braquial pela via posterior com ropivacaína a 0,2% Prevalencia de parálisis diafragmática después del bloqueo del plexo braquial por la vía posterior con ropivacaína a 0,2% Prevalence of diaphragmatic paralysis after brachial plexus blockade by the posterior approach with 0.2% ropivacaine

    OpenAIRE

    Marcos Guilherme Cunha Cruvinel; Carlos Henrique Viana de Castro; Yerkes Pereira Silva; Roberto Cardoso Bessa Júnior; Flávio de Oliveira França; Flávio Lago

    2006-01-01

    JUSTIFICATIVA E OBJETIVOS: O bloqueio de plexo braquial pela via interescalênica descrita por Winnie é uma das técnicas mais eficazes para promover analgesia pós-operatória de intervenções cirúrgicas no ombro. Uma de suas conseqüências é a paralisia diafragmática. Esta paralisia pode levar, em pacientes com algum grau de disfunção pulmonar prévia, à insuficiência respiratória. A abordagem do plexo braquial por via posterior tem conquistado espaço. O objetivo deste estudo foi determinar a prev...

  4. Estudo radiológico da dispersão de diferentes volumes de anestésico local no bloqueio de plexo braquial pela via posterior Estudio radiológico de la dispersión de diferentes volúmenes de anestésico local en el bloqueo de plexo braquial por vía posterior Radiological evaluation of the spread of different local anesthetic volumes during posterior brachial plexus block

    OpenAIRE

    Marcos Guilherme Cunha Cruvinel; Carlos Henrique Viana de Castro; Yerkes Pereira Silva; Flávio de Oliveira França; Flávio Lago

    2005-01-01

    JUSTIFICATIVA E OBJETIVOS: A dispersão do anestésico local no bloqueio interescalênico foi bem estudada, porém no bloqueio pela via posterior são poucos os estudos. O objetivo deste estudo foi determinar a dispersão de diferentes volumes de anestésico local nesta técnica através de exame radiológico contrastado. MÉTODO: Dezesseis pacientes submetidos a bloqueio do plexo braquial pela via posterior, 15 foram divididos aleatoriamente em três grupos de cinco: Grupo 1: volume de 20 mL; Grupo 2: v...

  5. del diagnóstico al encuentro con la persona

    Directory of Open Access Journals (Sweden)

    Javier Armenta Mejía

    2006-01-01

    Full Text Available El presente escrito aborda un enfoque centrado en la persona en el tratamiento de personas con psicosis o que tienen bloqueos en el contacto psicológico. Se revisa el trabajo de Garry Prouty sobre la preterapia, a la vez que se establece una diferencia con el tratamiento tradicional psiquiátrico.

  6. Effects of brushing timing after erosive challenge on enamel loss in situ: White light interferometer and nanoindentation study.

    Science.gov (United States)

    Tsuda, Yuka; Kitasako, Yuichi; Sadr, Alireza; Nakashima, Syozi; Tagami, Junji

    2016-01-01

    This in situ study aimed to evaluate effects of waiting periods after erosive challenge before toothbrushing on enamel abrasion and nanoindentation hardness. Ten subjects wore intraoral appliances each with a set of 4 bovine enamel blocks. The enamel blocks were subjected to 2 cycles a day for 3 days as follows; intraoral exposure to form acquired pellicle and extraoral erosion followed by either 0, 3, 30 or 60 min intraoral exposure and then brushing, which was performed using an automatic brushing machine. Abrasive loss was assessed by white light interferometry. Nanoindentation was performed to calculate relative hardness. Abrasion and relative hardness were statistically analyzed by ANOVA. Abrasive loss was significantly less in groups exposed to saliva compared with 0 min (p0.05). Relative hardness was statistically higher after intraoral exposure, but no differences existed among any intraoral exposure periods (p>0.05).

  7. Abordaje de la analgesia postoperatoria en cirugía de cadera: comparativa de 3 técnicas

    Directory of Open Access Journals (Sweden)

    M.I. Segado Jiménez

    2010-09-01

    Full Text Available Introducción: Resulta indispensable tratar el dolor postoperatorio de cirugía de cadera para iniciar una rehabilitación precoz y para disminuir la morbimortalidad. Dada la pluripatología y edad de los pacientes, la analgesia locorregional se revela como el arma más eficaz para tratarlo. Objetivos: Valorar la eficacia del bloqueo iliofascial y del bloqueo de los nervios obturador y femorocutáneo frente a analgesia intravenosa, así como registrar el grado de satisfacción, las complicaciones, inicio de rehabilitación y costes económicos en cada grupo. Pacientes y método: Estudio prospectivo con 90 pacientes sometidos a cirugía de cadera. Se dividieron en 3 grupos aleatorios: A: solo analgesia intravenosa, B: bloqueo iliofascial y C: bloqueo de los nervios obturador y femorocutáneo lateral. Se investigó el grado de dolor y satisfacción analgésica, tiempo transcurrido hasta el inicio de la sedestación, necesidad de analgésicos postoperatorios, efectos secundarios y los costes económicos farmacéuticos en cada grupo. Resultados: La eficacia analgésica y el grado de satisfacción fueron significativamente mayores en los pacientes con bloqueos nerviosos (EVA medio 2,14±1,24, satisfacción 3,75±0,8 que en los que solo recibieron analgesia intravenosa (EVA medio 5,57±0,64, satisfacción 2,83±0,7 (p<0,001, con una duración superior a las 24h (p<0,01 y un menor consumo de analgésicos suplementarios y otros fármacos que en el grupo A, por lo que tuvieron menos reacciones adversas (p<0,01, iniciaron la rehabilitación más precozmente (31,2±5,01h vs 44,62±7,9h (p<0,001 y supusieron un menor coste económico farmacéutico (13,26±6,34€/paciente vs 30,26±1,88€/paciente no encontrándose complicaciones en la realización de los bloqueos. No se encontraron diferencias significativas entre la eficacia de ambos bloqueos, evolución de los EVAs medio, grado de satisfacción ni gasto económico entre los pacientes que recibieron alg

  8. Avaliação radiográfica dos efeitos do aparelho Distal Jet nas distalizações intra-bucais: Um estudo piloto Radiographic evaluation of the effects of Distal Jet appliance in intraoral distalizations: a pilot study

    OpenAIRE

    Giordani Santos Silveira; Luiz Fernando Eto

    2004-01-01

    Freqüentemente, o tratamento da má oclusão de Classe II requer a distalização de molares superiores. O aparelho extrabucal foi o primeiro sistema criado para este fim, e ao longo de mais de um século de uso, provou sua eficiência. Entretanto, apresenta como grande desvantagem, o impacto estético negativo, já que os seus resultados estão atrelados à sistemática colaboração dos pacientes. Assim, vários aparelhos distalizadores intra-bucais foram desenvolvidos na expectativa de eliminar a necess...

  9. Análise quantitativa das AgNORs no carcinoma adenóide cístico intra-oral através da técnica de dupla marcação PCNA/AgNOR

    Directory of Open Access Journals (Sweden)

    Rivero Elena Riet-Correa

    2002-01-01

    Full Text Available A análise quantitativa das AgNORs e a imunomarcação para o PCNA têm sido empregadas de forma independente na avaliação da proliferação celular de vários tumores, e, em muitos casos, têm mostrado correlação positiva. Entretanto poucos trabalhos têm avaliado, em um mesmo corte histológico, a relação entre PCNA e AgNOR. O objetivo deste trabalho foi otimizar a técnica de dupla marcação com a finalidade de se estudar simultaneamente a correlação entre PCNA e AgNOR no carcinoma adenóide cístico (CAC de glândulas salivares menores. Foram selecionados 16 casos de CAC classificados de acordo com o subtipo histológico. A análise quantitativa das AgNORs foi feita por meio de análise de imagens. As AgNORs foram contadas em cem núcleos PCNA positivos e em cem núcleos PCNA negativos. O número médio de AgNOR nos núcleos PCNA positivos foi 2,14 ± 0,77, e, nos núcleos PCNA negativos, 1,97 ± 0,79, entretanto esta diferença não se mostrou estatisticamente significante (p = 0,2537. Nosso trabalho não mostrou correlação entre o número de AgNOR e a imunomarcação para o PCNA em CAC quando estes marcadores foram demonstrados simultaneamente através da dupla marcação. Quanto à técnica, o uso do microondas melhorou a coloração da AgNOR, permitindo uma redução no tempo de incubação com a solução de prata e uma melhor individualização das AgNORs, o que facilitou os procedimentos de contagem.

  10. Validation of a tactical analysis methodology for the study of pick and roll in basketball

    Directory of Open Access Journals (Sweden)

    Alejandro Vaquera

    2013-01-01

    Full Text Available El objetivo de esta investigación se centra en el diseño y validación de una propuesta metodológica de análisis táctico para el estudio del bloqueo directo en baloncesto, aplicando los principios de la metodología observacional y el registro contextualizado de acciones. Se han desarrollado tres fases: Fase 1 Identificación y selección de variables, donde se han definido y catalogado las variables conductuales (bloqueo directo, contextuales (zona del campo, tiempo de posesión y periodo de juego y evaluativas (resultado de la acción. Fase 2 Creación ad hoc de instrumentos de registro, en la que se ha adaptado una herramienta informática (software VA-Sports: Baloncesto para atender a las particularidades y necesidades específicas del estudio de acciones de bloqueo directo. Fase 3 Control de la calidad del dato, en la que se fijaron los criterios de selección de la muestra, se desarrolló el proceso de entrenamiento de observadores, y se verificó el nivel de acuerdo interno o concordancia intraobservador, para evaluar la fiabilidad de la propuesta metodológica. Fueron analizadas un total de 192 acciones de bloqueo directo correspondientes a 6 partidos completos de la Liga ACB española. Se pudo constatar una elevada fiabilidad de la propuesta metodológica diseñada que, en su conjunto obtuvo un elevado valor promedio de Kappa (0.994, lo que permite concluir que las variables de análisis propuestas resultan precisas, en su definición y categorización para estudiar acciones de bloqueo directo. Las variables tiempo de posesión, periodo de juego y resultado de la acción, han evidenciado un nivel de concordancia máximo (valor Kappa de 1.000, al tiempo que las variables bloqueo directo y zona del campo, también han evidenciado un grado de objetividad elevado (valores de Kappa de .990 y .981 respectivamente.

  11. X-Ray diagnostics and their relation to a successful endodontic treatment

    International Nuclear Information System (INIS)

    Radiography plays very major rule in endodontic. One of the most used method is intraoral radiography ( intraoral diagnostic x-ray, x-ray with hand root instrument, recall, after call and follow up x-ray ). These radiographic pictures help us detect the morphology of the root canal system, endodontic complications and periapical lessions. X-ray radiographs have to be isometric in the ortoradial projection. Some cases we may use the ex-centric projection (mesial and distal projection). Endodontic complications as broken hand root instrument, via falsa, intra-canal step may be confirmed by intraoral x-ray radiographs. (authors)

  12. Aprender lo justo, pero no más

    Directory of Open Access Journals (Sweden)

    Miguel A. Vadillo

    2012-04-01

    Full Text Available Un importante reto de la psicología cognitiva es entender cómo aprendemos a ignorar información redundante y a codificar sólo la información imprescindible. En el ámbito de la psicología del aprendizaje, pocos fenómenos nos han dado tanta información sobre el carácter selectivo del aprendizaje como el efecto de bloqueo, ampliamente investigado en todo tipo de preparaciones experimentales con animales y humanos. Cuatro décadas después de los primeros estudios sobre este fenómeno, el bloqueo continúa en el centro de todas las discusiones teóricas sobre el aprendizaje, convirtiéndose en el campo de batalla sobre el que se libran los debates entre los partidarios de explicaciones asociativas y los defensores de explicaciones racionales.

  13. Influência da procainamida sobre o bloqueio neuromuscular produzido pelo rocurônio e investigação sobre o mecanismo de ação da procainamida na junção neuromuscular Influencia de la procainamida sobre el bloqueo neuromuscular producido por el rocuronio e investigación sobre el mecanismo de acción de la procainamida en la junción neuromuscular Influence of procainamide on the neuromuscular blockade caused by rocuronium and investigation on the mechanism of action of procainamide on the neuromuscular junction

    OpenAIRE

    Thalita Duque Martins; Yolanda Christina S. Loyola; Angélica de Fátima de Assunção Braga

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: A potencialização da procainamida sobre o bloqueio neuromuscular produzido pela d-tubocurarina já está comprovada, porém o mecanismo é controverso. O objetivo do estudo foi avaliar a influência da procainamida no bloqueio neuromuscular produzido pelo rocurônio e investigar os mecanismos desta interação. MÉTODO: Foram utilizados 15 ratos (250 a 300 g) em preparação descrita por Bülbring. Formaram-se os seguintes grupos (n = 5 cada): procainamida - 20 µg.mL-1 (G...

  14. Comparação das técnicas transarterial e de estimulação de múltiplos nervos para bloqueio do plexo braquial por via axilar usando lidocaína com epinefrina Comparación de las técnicas transarterial y de estimulación de múltiples nervios para bloqueo del plexo braquial por vía axilar usando lidocaína con epinefrina Comparison of transarterial and multiple nerve stimulation techniques for axillary block using lidocaine with epinephrine

    OpenAIRE

    Luiz Eduardo Imbelloni; Lúcia Beato; José Antônio Cordeiro

    2005-01-01

    JUSTIFICATIVA E OBJETIVOS: A técnica transarterial com grandes doses de anestésico local resulta em alta efetividade para o bloqueio axilar do plexo braquial. A técnica utilizando múltiplos estímulos exige mais tempo e maior experiência. Este estudo prospectivo compara a latência e o índice de sucesso do bloqueio do plexo braquial usando duas técnicas de localização: transarterial ou múltipla estimulação dos nervos. MÉTODO: A lidocaína com epinefrina, 800 mg, foi usada inicialmente para o blo...

  15. Estudo comparativo da eficácia analgésica pós-operatória de 20, 30 ou 40 mL de ropivacaína no bloqueio de plexo braquial pela via posterior Estudio comparativo de la eficacia analgésica postoperatoria de 20, 30 o 40 mL de ropivacaína en el bloqueo de plexo braquial por la vía posterior A comparative study on the postoperative analgesic efficacy of 20, 30, or 40 mL of ropivacaine in posterior brachial plexus block

    OpenAIRE

    Marcos Guilherme Cunha Cruvinel; Carlos Henrique Viana de Castro; Yerkes Pereira Silva; Gustavo Prosperi Bicalho; Flávio de Oliveira França; Flávio Lago

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: As intervenções cirúrgicas por via artroscópica no ombro estão relacionadas com a dor pós-operatória de grande intensidade. Dentre as técnicas de analgesia, o bloqueio do plexo braquial é a que oferece os melhores resultados. O objetivo deste estudo foi determinar qual volume de anestésico local no bloqueio de plexo braquial pela via posterior propicia analgesia pós-operatória para essas operações de maneira mais eficiente. MÉTODO: Noventa pacientes submetidos a blo...

  16. Estudo comparativo da eficácia analgésica pós-operatória de 20 mL de ropivacaína a 0,5, 0,75 ou 1% no bloqueio de plexo braquial pela via posterior Estudio comparativo de la eficacia analgésica postoperatoria de 20 mL de ropivacaina a 0,5, 0,75 ó 1% en el bloqueo de plexo braquial por la vía posterior Comparative study for the postoperative analgesic efficacy of 20 mL at 0.5, 0.75, and 1% ropivacaine in posterior brachial plexus block

    OpenAIRE

    Marcos Guilherme Cunha Cruvinel; Carlos Henrique Viana de Castro; Yerkes Pereira Silva; Bruno Salomé Morais; Flávio de Oliveira França; Flávio Lago

    2008-01-01

    JUSTIFICATIVA E OBJETIVOS: As intervenções cirúrgicas por via artroscópica no ombro estão relacionadas com a dor pós-operatória de grande intensidade. Dentre as técnicas de analgesia, o bloqueio do plexo braquial é a que oferece os melhores resultados. O objetivo deste estudo foi determinar qual concentração de anestésico local no bloqueio de plexo braquial pela via posterior propicia analgesia pós-operatória mais prolongada para essas operações. MÉTODO: Noventa pacientes submetidos ao bloque...

  17. Comparison of bupivacaine alone and in combination with fentanyl or pethidine for bilateral infraorbital nerve block for postoperative analgesia in paediatric patients for cleft lip repair: A prospective randomized double blind study

    Directory of Open Access Journals (Sweden)

    Rajesh S Mane

    2011-01-01

    Conclusion: Thus we conclude that addition of fentanyl or pethidine to bupivacaine for Bilateral Intraoral Infraorbital Nerve Block prolong the duration of analgesia with no complications and can be used safely in paediatric patients.

  18. Disease: H00485 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available H00485 Robinow syndrome Robinow syndrome is characterized by distinctive craniofacial...hn MT, Cunningham ML, Petryk A, Lohr JL Craniofacial and intraoral phenotype of Robinow syndrome forms. Clin Genet 80:15-24 (2011) ...

  19. Dentomaxillofacial imaging with panoramic views and cone beam CT

    OpenAIRE

    Suomalainen, Anni; Pakbaznejad Esmaeili, Elmira; Robinson, Soraya

    2015-01-01

    Panoramic and intraoral radiographs are the basic imaging modalities used in dentistry. Often they are the only imaging techniques required for delineation of dental anatomy or pathology. Panoramic radiography produces a single image of the maxilla, mandible, teeth, temporomandibular joints and maxillary sinuses. During the exposure the x-ray source and detector rotate synchronously around the patient producing a curved surface tomography. It can be supplemented with intraoral radiographs. Ho...

  20. Pleomorphic adenoma of the hard palate

    Directory of Open Access Journals (Sweden)

    Kaur S

    2003-03-01

    Full Text Available Pleomorphic adenoma is a benign tumor of the salivary glands that has elements of both epithelial and mesenchymal tissues. The tumor most commonly arises in the parotid or submandibular glands. Infrequently, it may arise from the minor salivary glands and present as an intraoral mass over the palate or lip. We report a patient with pleomorphic adenoma over the hard palate, which resembled common intraoral diseases like condyloma acuminata, oral papilloma and squamous cell carcinoma.

  1. Halitosis management by the general dental practitioner—results of an international consensus workshop.

    OpenAIRE

    Seemann, Rainer; Conceicao, M. D.; Filippi, A.; Greenman, J.; Lenton, P.; Nachnani, S.; Quirynen, M.; Roldan, S.; Schulze, H.; Sterer, N.; Tangerman, A.; Winkel, E.G.; Yaegaki, K.; Rosenberg, M

    2014-01-01

    Clinical investigations on patients suffering from halitosis clearly reveal that in the vast majority of cases the source for an offensive breath odor can be found within the oral cavity (90%). Based on these studies, the main sources for intra-oral halitosis where tongue coating, gingivitis/periodontitis or a combination of the two. Thus, it is perfectly logical that general dental practitioners (GDPs) should be able to manage intra-oral halitosis under the conditions found in a normal denta...

  2. Accuracy of complete-arch dental impressions: a new method of measuring trueness and precision

    OpenAIRE

    Ender, Andreas; Mehl, Albert

    2013-01-01

    STATEMENT OF PROBLEM: A new approach to both 3-dimensional (3D) trueness and precision is necessary to assess the accuracy of intraoral digital impressions and compare them to conventionally acquired impressions. PURPOSE: The purpose of this in vitro study was to evaluate whether a new reference scanner is capable of measuring conventional and digital intraoral complete-arch impressions for 3D accuracy. MATERIAL AND METHODS: A steel reference dentate model was fabricated and measured with a...

  3. Flemish general dental practitioners' knowledge of dental radiology

    OpenAIRE

    Aps, Johan

    2010-01-01

    The aim of this study was to assess general dental practitioners' knowledge of dental radiography and radiation protection in order to alert the Belgian authorities and dental professional societies. Prior to attending a postgraduate course on intraoral radiology, general dental practitioners in Flanders, Belgium, were asked to fill in a questionnaire regarding the radiological equipment and the techniques they used for intraoral radiography. The availability and type of dental panoramic equi...

  4. Cone beam computed tomography in oral radiology

    OpenAIRE

    Suomalainen, Anni

    2010-01-01

    In dentistry, basic imaging techniques such as intraoral and panoramic radiography are in most cases the only imaging techniques required for the detection of pathology. Conventional intraoral radiographs provide images with sufficient information for most dental radiographic needs. Panoramic radiography produces a single image of both jaws, giving an excellent overview of oral hard tissues. Regardless of the technique, plain radiography has only a limited capability in the evaluation of thre...

  5. Importancia de la proteína Rev del virus de la inmunodeficiencia humana tipo 1 en la inhibición de la replicación en células murinas

    Directory of Open Access Journals (Sweden)

    Ajit Kumar

    2001-04-01

    Full Text Available

    Entre los obstáculos que existen para entender la infección y la respuesta inmune por el HIV-1 está la ausencia de modelos animales que permitan estudiar la patogénesis del SIDA. Modelos murinos han sido desarrollados, pero carecen de replicación productiva a largo término debido a que la glicoproteína de envoltura del HIV-1 no se une al receptor CD4 ni al correceptor
    CCR5 murino, o porque la transcripción directa del promotor es ineficiente debido a una actividad atenuada de Tat (1, que es rescatada por la ciclina T1 humana. La coexpresión de CD4, CCR5 humanas en cultivo de células murinas permite la entrada del virus sin viremia detectable. En animales transgénicos que expresan la ciclina T1, se observa un bloqueo postranscripcional que afecta la replicación. La proteína Rev es fundamental en el ciclo replicativo del HIV-1 (2; el bloqueo de su actividad explicaría la ausencia de replicación del virus en células murinas. El objetivo de este trabajo fue evaluar y caracterizar el dominio de Rev implicado en el bloqueo de la exportación en células murinas.

     

  6. EFFECTS OF SUCROSE/NaCl MIXTURES STIMULATION ON C-FOS-LIKE IMMUNOREACTIVITY IN THE TASTE-RELATED NUCLEI IN RATS

    Institute of Scientific and Technical Information of China (English)

    蒋恩社; 闫剑群; 宋新艾

    2003-01-01

    Objective To investigate the changes of neuronal activation in taste-related nuclei following intraoral taste stimulation with binary taste mixtures of sucrose and NaCl. Methods Neuronal activation in response to intraoral taste stimulation with 0.5 mol*L-1 sucrose, 0.3 mol*L-1 NaCl, sucrose+NaCl mixture and distilled water was evaluated in taste-related nuclei by using c-Fos-like immunoreactivity(c-FLI) in the rats deprived of water overnight. Results The consumption of sucrose+NaCl mixture was lower than that of sucrose solution. Intraoral sucrose or NaCl stimulation induced more c-FLI than distilled water in the external lateral subnucleus of the rostral parabrachial nucleus (PBN), but the c-FLI induced by intraoral sucrose+NaCl mixture stimulation was less than that induced by sucrose solution in this subnucleus. Compared with distilled water, the intraoral sucrose or sucrose+NaCl mixture stimulation induced more c-FLI in the central amygdala. ConclusionThese results suggest that salty taste has a suppressive effect on the neuronal activations induced by sweet taste in the external lateral subnucleus of rostral PBN in rats.

  7. Enfermedad de Chagas en pacientes con miocardiopatía dilatada idiopática en Costa Rica

    Directory of Open Access Journals (Sweden)

    Oswaldo Gutiérrez-Sotelo

    2007-04-01

    Full Text Available Justificación y objetivo: Determinar la prevalencia de la enfermedad de Chagas en un grupo de pacientes con miocardiopatía dilatada, bradiarritmias y taquiarritmias ventriculares en Costa Rica. Material y métodos: Estudio observacional, descriptivo, prospectivo de una serie de casos. Se seleccionaron pacientes con diagnóstico clínico y ecocardiográfico de miocardiopatía dilatada, bloqueo atrioventricular o intraventricular documentados o con arritmia ventricular compleja, excluyéndose aquellos en quienes hubiera uno o más factores causales (enfermedad arterial coronaria o cardiopatía hipertensiva. Mediante consentimiento informado, se les realizó un estudio con 2 pruebas serológicas de diferente fuente para detectar IgG anti-Trypanosoma cruzi. Resultados: De aproximadamente 15.000 a 20.000 vistos pacientes por año en la Consulta Externa del Servicio de Cardiología del Hospital México, unos 500 se presentan con el diagnóstico de miocardiopatía dilatada. Excluidos los pacientes con causa conocida de su cardiopatía, entre febrero de 2004 y noviembre de 2005 se reclutó a 74 pacientes, 41 hombres y 33 mujeres, con edades comprendidas entre los 13 y los 87 años (promedio 47,9, de los cuales la mayoría (n=51; 68,9% tenían miocardiopatía dilatada idiopática, con una fracción de eyección promedio del 29,2%; 18 (24,33% se incluyeron por bloqueo atrioventricular y 5 por arritmia ventricular compleja. De los 78 pacientes, 5 (6,8% resultaron tener serología positiva por enfermedad de Chagas; de estos: 3 con miocardiopatía dilatada, uno con bloqueo atrioventricular completo y uno con arritmia ventricular compleja. Cabe destacar que solo uno de los 3 pacientes dilatados tiene el electrocardiograma característico de la fase crónica de la enfermedad de Chagas: bloqueo AV de primer grado, bloqueo completo de rama derecha y hemibloqueo anterior izquierdo. Conclusión: Los datos obtenidos en esta investigación revelan que la

  8. Treatment results and complications in clinical combinations of radiation and chemotherapy in the treatment of localized cancer in the head and neck

    International Nuclear Information System (INIS)

    By using chemotherapy combined with radiotherapy, significant improvements were achieved in treatment results of localized non-Hodgkin's lymphoma, intraoral cancer, and carcinoma of the maxillary sinus. Administering chemotherapy with radiation was given sumultaneously in the patients with intraoral cancer (BLM iv) and with carcinoma of the maxillary sinus (5-FU ia). In the patients with non-Hodgkin's lymphoma, chemotherapy (1 or 2 cycles of COPP) was administered and followed by radiotherapy. If radiation dose were reduced by about 50% in the intraoral cancer, 20% in carcinoma of the maxillary sinus, and 10% in non-Hodgkin's lymphoma, acute and/or chronic complications were within tolerable limits in this series of observations, although toxicity was dose-related for both chemotherapy and radiotherapy. (author)

  9. The Use of an Alternative Extraoral Periapical Technique for Patients with Severe Gag Reflex

    Science.gov (United States)

    e Silva, Mauro Henrique Chagas; Santos, Mariane Floriano Lopes; de Lima, Carolina Oliveira; Campos, Celso Neiva

    2016-01-01

    Gag reflex is a physiologic mechanism that promotes contraction of the muscles of the tongue and pharyngeal walls. Different factors, including intraoral radiographic films and sensors, may trigger this reflex. Patients with severe gag reflex may not be able to tolerate the presence of intraoral radiographic films or sensors during root canal therapy (RCT). This factor may prevent an appropriate intraoral radiograph, which is important in RCT. Different approaches have been used to facilitate dental procedures in patients suffering from severe gag reflex. The use of an extraoral radiographic technique is an alternative method to obtain working length confirmation in patients with severe gag reflex. In this report of 2 cases, the use of an extraoral radiographic technique as an alternative approach during RCT in patients with severe gag reflex associated with phobic behavior and trismus was successfully demonstrated. PMID:27547474

  10. The Use of an Alternative Extraoral Periapical Technique for Patients with Severe Gag Reflex

    Science.gov (United States)

    e Silva, Mauro Henrique Chagas; Santos, Mariane Floriano Lopes; de Lima, Carolina Oliveira; Campos, Celso Neiva

    2016-01-01

    Gag reflex is a physiologic mechanism that promotes contraction of the muscles of the tongue and pharyngeal walls. Different factors, including intraoral radiographic films and sensors, may trigger this reflex. Patients with severe gag reflex may not be able to tolerate the presence of intraoral radiographic films or sensors during root canal therapy (RCT). This factor may prevent an appropriate intraoral radiograph, which is important in RCT. Different approaches have been used to facilitate dental procedures in patients suffering from severe gag reflex. The use of an extraoral radiographic technique is an alternative method to obtain working length confirmation in patients with severe gag reflex. In this report of 2 cases, the use of an extraoral radiographic technique as an alternative approach during RCT in patients with severe gag reflex associated with phobic behavior and trismus was successfully demonstrated.

  11. Relación entre daño mitocondrial y producción de H2O2 en embriones bovinos producidos in vitro con alto y bajo potencial de desarrollo

    Directory of Open Access Journals (Sweden)

    Marlene Jiménez

    2001-04-01

    Full Text Available

    Los embriones producidos in vitro (EPIV presentan bloqueo en el
    desarrollo en el momento de la activación del genoma (8-16 células en bovinos, limitando la producción de blastocitos (35%. Este fenómeno ha sido relacionado con la producción de Especies Reactivas de Oxígeno (ERO. Entre las fuentes de ERO se han descrito altas tensiones de oxígeno, exposición a la luz y alteración del metabolismo oxidativo (1. Los EPIV con baja competencia para superar el bloqueo presentan fallas en la funcionalidad mitocondrial (1 y nucleolar, exhibiendo un retardo en su tasa de clivaje (2. Algunos autores han relacionado el tiempo al primer clivaje con la cantidad relativa de ciertos
    transcriptos, como Glutatión (2, un limpiador de ERO, sugiriendo que los embriones incompetentes presentan fallas  transcripcionales que les impiden defenderse contra las ERO producidas en cultivo, quizás manteniendo niveles elevados de H2O2 lo que los hace más susceptibles al daño celular.
    Hasta el presente no se ha efectuado un estudio de cinética de producción de ERO, en EPIV bovinos con alta y baja competencia durante el desarrollo temprano, ni se ha logrado esclarecer el papel de la mitocondria en la generación de ERO (como fuente o como blanco.
    Los objetivos de este estudio son determinar la cinética de producción de H2O2 en embriones con alta y baja competencia para superar el bloqueo y la relación de éstos con procesos de daño mitocondrial y mortalidad embrionaria.

     

     

  12. Inhibición in situ de la adhesión de pasteurella multocida a receptores del epitelio respiratorio de conejos por medio de lectinas

    OpenAIRE

    Carrillo Lamus, Magda Patricia

    2011-01-01

    Pasteurella multocida utiliza como paso previo a la infección adhesinas con propiedad de lectinas y carbohidratos sobre su superficie que reconocer carbohidratos y lectinas respectivamente sobre el epitelio respiratorio de sus hospederos. En este trabajo se evaluó la capacidad de 18 lectinas de evitar la unión de la bacteria al epitelio y presentación de lesiones como consecuencia de la acción de la bacteria sobre el tejido, esto se hizo en dos experimentos diferentes, bloqueo e inhibición de...

  13. Aportaciones del sistema Unilock 2.0 a la osteosíntesis mandibular Contributions of the 2.0 unilock system to mandibular osteosynthesis

    OpenAIRE

    S. Martínez-Villalobos Castillo; M.A. Sicilia Gutiérrez; L.M. Capitán Cañadas; A. Labrot Moleon; D. Sánchez López; E. Valencia Laseca

    2004-01-01

    El sistema Unilock 2.0 constituye la última generación de placas que incorporan el "principio de bloqueo" en su concepción y diseño. Desarrolladas a partir del sistema Unilock 2.4, aportan mayor sencillez y comodidad en su manejo incorporando muchas de sus prestaciones biomecánicas y abarcando además todas las indicaciones de las miniplacas convencionales. En este artículo revisamos sus características técnicas, sus indicaciones clínicas así como nuestra experiencia en su empleo para diferent...

  14. Fracturas del húmero proximal: su tratamiento con clavos bloqueados proximales

    OpenAIRE

    Arenas Planelles, Antonio; D'Arrigo, A.; Arenas Miquélez, A.; Duart, J.

    2012-01-01

    Se presentan 27 casos de fractura de húmero proximal tratados mediante osteosíntesis con clavo proximal bloqueado. Los resultados fueron buenos en la mayor parte de los pacientes, con un dolor medio de 11,67/15 en la cotación cifrada de Constant, una fuerza de 14/25 puntos y una movilidad de 20,52/40 puntos. Las complicaciones más importantes fueron el conflicto subacromial (29,6%), la consolidación viciosa de la fractura en varo (29,6%) y la protrusión de los tornillos de bloqueo...

  15. Diseño y evaluación de un algoritmo adaptable control de concurrencia

    OpenAIRE

    Palma Muñoz, Wenceslao Enrique; Monge Anwandter, Raúl

    2004-01-01

    El rendimiento de un Sistema de Procesamiento de Transacciones puede ser afectado, entre otras cosas, por el Método de Control de Concurrencia utilizado, donde los esquemas optimistas ofrecen una alternativa a métodos basados en bloqueo. Ambos métodos poseen un mejor desempeño bajo condiciones operacionales opuestas. Sin embargo, dado que en general el comportamiento operativo es difícil de predecir, usualmente los servicios de procesamiento de transacciones optan por uno de ellos. Este traba...

  16. Balance de carga dinámico en redes celulares

    OpenAIRE

    Molines Villanueva, Víctor

    2013-01-01

    Nuestro primer objetivo será el análisis de las prestaciones de los sistemas de balance de carga que tenga en cuenta la movilidad de los usuarios. Nuestro segundo objetivo es hallar la probabilidad de bloqueo como parámetro de mérito de prestaciones, que es la relación entre el número de sesiones nuevas bloqueadas y el número de sesiones nuevas ofrecidas. Nuestra contribución es la de diseñar y desarrollar un modelo analítico y de simulación que emule un sistema multicelular...

  17. Evaluación de un nuevo quimiotipo de moduladores de tubulina del dominio de vinca

    OpenAIRE

    Sáez Calvo, Gonzalo

    2015-01-01

    En la actualidad, uno de los mayores problemas de salud pública en los países desarrollados es el cáncer y por este motivo, el estudio de nuevos tratamientos contra dicha enfermedad recibe una especial atención. De todas las terapias existentes, la quimioterapia es la opción preferencial en la mayoría de casos debido a sus buenas expectativas de éxito. La quimioterapia consiste en el bloqueo de una función celular específica mediante el suministro de un agente químico, siendo las dos rutas ce...

  18. Estudio biofarmacéutico de geles antiinflamatorios no esteroideos (AINES)

    OpenAIRE

    Margarita Restrepo; María del Rosario Osorio

    2000-01-01

    Los antiinflamatorios no esteroideos (AINES) son un grupo heterogéneo de compuestos con actividad analgésica, antipirética y antiinflamatoria que comparten efectos secundarios indeseables, tales como: ulceración gástrica e intestinal, anemia, bloqueo de la agregación plaquetaria, inhibición de la motilidad uterina e hipersensibilidad. Los AINES se utilizan por vía tópica con el fin de aliviar lesiones en tejidos...

  19. Tumor atrial izquierdo, fístula coronaria y arritmias

    OpenAIRE

    Eric Bogantes Pereira; Jorge Chavarría Víquez

    2007-01-01

    Se presenta el caso de un paciente de 66 años con varios hallazgos patológicos cardiacos muy peculiares: tumor atrial, fibrilación atrial, bloqueo atrioventricular de alto grado intermitente y la presencia de una fístula coronaria que emerge de la arteria coronaria derecha.The case of a 66 years old male with several peculiar cardiac pathological findings is presented: atrial mass, atrial fibrillation, high degree intermittent atrioventricular block and the presence of a coronary fistula emer...

  20. Tumor atrial izquierdo, fístula coronaria y arritmias

    Directory of Open Access Journals (Sweden)

    Eric Bogantes Pereira

    2007-09-01

    Full Text Available Se presenta el caso de un paciente de 66 años con varios hallazgos patológicos cardiacos muy peculiares: tumor atrial, fibrilación atrial, bloqueo atrioventricular de alto grado intermitente y la presencia de una fístula coronaria que emerge de la arteria coronaria derecha.The case of a 66 years old male with several peculiar cardiac pathological findings is presented: atrial mass, atrial fibrillation, high degree intermittent atrioventricular block and the presence of a coronary fistula emerging from the right coronary artery.

  1. Modificación neonatal de la actividad andrógenica: impacto sobre la programación endocrino-metabólica en la rata hembra

    OpenAIRE

    Ongaro Gambino, Luisina

    2014-01-01

    El objetivo general de este estudio es avanzar en el esclarecimiento de mecanismos fisiopatológicos responsables del desarrollo de cambios en el metabolismo y la función esteroidogénica adrenal y ovárica como consecuencia de una modificación de la acción androgénica, ya sea por una hiperandrogenemia temprana como por un bloqueo de los receptores de andrógeno a edad neonatal. Está postulado que la androgenización pre-o neonatal en el sexo femenino interaccionaría con factores genéticos, el med...

  2. Estudio de toxicidad aguda S(+)-Ketamina y RS-Ketamina administrada por vía subaracnoidea en conejos. Comparación con lidocaína.

    OpenAIRE

    Arcusa Mon, Maria Jesús

    2005-01-01

    RESUMEN Hay publicados numerosos estudios sobre la ketamina administrada por vía subaracnoidea en animales de experimentación y en humanos, sin embargo los datos sobre la neurotoxicidad que produce son controvertidos. La hipótesis de trabajo se basa en demostrar que el isómero levógiro de la ketamina (S(+)K) y la mezcla racémica de la ketamina sin conservantes (RSK) administradas por vía subaracnoidea en conejos producen bloqueo sensitivo y motor y tienen escasa toxicidad neurológica. ...

  3. El silenciamiento del intercambiador Na+/H+ (NHE1) en mitocondrias cardíacas previene la apertura del poro de transición mitocondrial

    OpenAIRE

    Villa-Abrille, M. C.; Cingolani, Horacio Eugenio; Cingolani, E; Álvarez, Bernardo Víctor

    2010-01-01

    Hasta el momento han sido descriptas diez isoformas del intercambiador Na+ /H+ (NHE1- NHE10), las cuales difieren en sus estructuras, distribución, localización, y sensibilidad ante diferentes estímulos. La inhibición del intercambiador Na+ /H+ (NHE1) reduce los daños producido por isquemia/reperfusión (I/R), hipertrofia e insuficiencia cardíaca. Si bien entre los mecanismos que subyacen al efecto protector mediado por bloqueo del NHE1 involucran el mantenimiento del potencial de membrana mit...

  4. Dos niveles hidroaéreos en una cavidad pleural / Two air-fluid levels in a pleural cavity

    Directory of Open Access Journals (Sweden)

    Yoandy López de la Cruz

    2015-08-01

    Full Text Available Hombre de 56 años de edad con antecedentes de cirugía de doble remplazo valvular (mitro-aórtico 16 años antes, con implantación de marcapasos permanente por bloqueo atrioventricular de alto grado, que en los últimos años ha evolucionado a una miocardiopatía dilatada, con dilatación de aorta ascendente y arco, así como hipertensión arterial pulmonar.

  5. Los límites impuestos a la desobediencia civil:una revisión

    OpenAIRE

    Colombo, Ariel

    2012-01-01

    El artículo revisa -tomando como referencia el episodio de un bloqueo de vías en Argentina durante siete días con sus noches, por parte de los habitantes de las localidades de Cutralco y Plaza Huincul, Argentina, con motivo de la privatización de YPF- el debate sobre la desobediencia civil, que es usualmente entendida como una desobediencia por la fuerza al orden constitucional. El autor desarrolla los componentes que la desobediencia civil tiene de específico, a saber: es disruptiva, pacífic...

  6. Relaciones en disputa: nación, género, raza y turismo en Cuba

    OpenAIRE

    Ana Alcázar Campos

    2014-01-01

    En este artículo se analiza la manera en que la introducción del turismo de masas en Cuba, en los años noventa, produce una serie de contradicciones en la ideología nacional cubana, la cual parte del mito fundacional latinoamericano del mestizaje y se refuerza, a partir del triunfo revolucionario de 1959, con la defensa de una supuesta lógica igualitaria. En un contexto caracterizado como aislado —algo vigorizado por el bloqueo estadounidense y las restricciones migratorias cubanas—, las “zon...

  7. Optimización de los protocolos de hiperestimulación ovárica controlada para FIV/ICSI en pacientes diagnosticadas de síndrome de ovarios poliquísticos

    OpenAIRE

    Gil Raga, Fernando

    2010-01-01

    Objetivo principal Comprobar la eficacia y seguridad de la estimulación con FSHr bajo bloqueo gonadotropo hipofisario por administración de una antagonista de GnRH (Ganirelix) iniciando ésta al comienzo del ciclo menstrual, simultáneamente a la administración de FSHr en un grupo de estudio formado por mujeres estériles diagnosticadas de SOP. Material y Métodos Diseño: Estudio longitudinal prospectivo y comparativo, no randomizado, de 3 años de duración. Muestra: 278 pacientes di...

  8. MIASTENIA GRAVIS: Relación entre los síntomas de la enfermedad, la ingesta alimentaria y la medicación administrada

    OpenAIRE

    Olave, Julieta

    2010-01-01

    La Miastenia Gravis es una enfermedad autoinmune, crónica, con predisposición genética, cuyo mecanismo patogénico es la disminución, destrucción o bloqueo de los receptores de Acetilcolina de la membrana postsináptica en la placa motora por parte de anticuerpos, donde cambian la fisiología de la unión neuromuscular. Es de difícil diagnóstico porque puede confundirse los signos y síntomas con otras afecciones neuromusculares. Las principales manifestaciones son: diplopía, pto...

  9. Modelado, implementación, optimización y generación de estadísticas de desempeño en una BDOO

    OpenAIRE

    Aguirre, Alejandro M.; D'Iorio, Lorena; Vera, Marcela A.

    2013-01-01

    El presente trabajo, muestra los resultados obtenidos en el proyecto de investigación de cátedra realizado en la Sede Rafaela de la Universidad Católica de Santiago del Estero en un lapso de catorce meses iniciados en mayo del 2011, el cual aborda la problemática de la optimización en el diseño de una Base de Datos Orientada a Objetos (BDOO), garantizando bloqueos eficientes, concurrencia y acceso multiusuario. Se realizó el diseño e implementación de una BDOO del material bibliográfico ex...

  10. Disruptores endocrinos, un posible riesgo tóxico en productos de consumo habitual

    OpenAIRE

    Moreno Márquez, Eva María; Núñez Álvarez, Azucena

    2012-01-01

    Los disruptores endocrinos son todos aquellos compuestos químicos que presentan en común la propiedad de alterar el equilibrio hormonal del sistema endocrino de los organismos. Esta alteración provocada por los disruptores endocrinos puede generarse mediante bloqueo de la acción hormonal por competición con el receptor hormonal, suplantación o mímesis de las hormonas endógenas, o mediante aumento o disminución de los niveles de actividad hormonal. Dicho desequilibrio del sistema endocrino pue...

  11. Nervios motores no excitables en el síndrome de guillain -barré en niños

    OpenAIRE

    Ortíz Corredor, Fernando

    2010-01-01

    En el síndrome de Guillain-Barré (SGB) se reconocen cuatro patrones de presentación fisiopatológica: la forma  desmielinizante, la neuropatía motora axonal aguda (NMAA), la neuropatía sensruvo-motora axonal aguda (NSMAA) y el Síndrome de Miller-Fisher (1). La no excitabilidad eléctrica denominada anteriormente bloqueo completo de la conducción es un hallazgo electrofisiológico que se reconoce dentro de todo el espectro fisiopatológico del SGB como una manifestación de una degeneración axonal ...

  12. DESARROLLO EMBRIONARIO Y ESTRATEGIAS ANTILUTEOLITICAS HORMONALES EN PROGRAMAS DE TRANSPLANTE DE EMBRIONES BOVINOS

    Directory of Open Access Journals (Sweden)

    Néstor Tovío L

    2008-04-01

    Full Text Available Durante el desarrollo embrionario se establecen múltiples interacciones entre hormonas, factores de crecimiento (FC y diferente tipo de moléculas, con lo cual se genera una serie de señales que desencadenan el reconocimiento materno de preñez (RMP entre los días 15 y 17, momento en el cual se genera un “periodo crítico”, cuando el endometrio libera la hormona prostaglandina F2a (PGF2apara causar regresión del cuerpo lúteo (CL, en el cual se sintetiza progesterona (P4, hormona encargada de favorecer un adecuado ambiente uterino para el desarrollo embrionario y el mantenimiento de la preñez. El embrión en desarrollo genera señales antiluteolíticas que bloquean la producción de la PGF2a, por lo que se podría sugerir que el mantenimiento de la preñez es dependiente de la efectividad de este bloqueo, entre otros factores; el cual es generado por la acción del Interferón tau (IFN-t, producido en las células mononucleares del trofoblasto embrionario. Este bloqueo garantiza la integridad del CL y de esta forma la producción normal de P4. Por lo anterior se podría pensar que la manipulación estratégica apoyada hormonalmente, mejora las condiciones para el efectivo bloqueo de los agentes luteolíticos que tienen su mayor actividad durante el llamado “periodo crítico”, con lo cual se mejora la tasa de sobrevivencia en programas de transplante embrionario ya que se crearía un ambiente uterino adecuado para el establecimiento y normal desarrollo del embrión. Por esto mismo, últimamente se han planteado mecanismos de apoyo hormonal que causan un bloqueo apropiado en cuanto a la producción de PGF2a uterina durante los días15 y 17 del ciclo estral.

  13. Medición del daño genético inducido por el basuco en linfocitos humanos empleando la prueba de micronúcleos con citocalasina b

    OpenAIRE

    Ocampo AP.; Carvajal SM.; Hoyos LS.

    2011-01-01

    El bazuco es una mezcla compleja que se deriva del proceso de extracción de la cocaína. El frecuente consumo de bazuco constituye un problema de salud pública. La prueba de micronúcleos en linfocitos humanos de sangre periférica por bloqueo de la citocinesis con Citocalasina B, es más sensible y precisa para evaluar daño  cromosómico porque permite registrar micronúcleos originados de fragmentos de cromosomas o cromosomas enteros en células que se han dividido una sola vez. El objetivo del pr...

  14. Genotoxicidad de los campos magnéticos de frecuencia extremadamente baja determinada mediante el ensayo de micronúcleos.

    OpenAIRE

    Olmos Ortíz, Encarnación

    2013-01-01

    Se estudia un posible efecto genotóxico inducido por campos electromagnéticos de extremada baja frecuencia (ELM-EMF) mediante el aumento de lesiones cromosómicas inducidas determinadas por el incremento de la frecuencia de aparición de micronúcleos tanto in vivo, sobre eritroblastos policromatófilos en médula ósea de roedor, como in vitro sobre linfocitos humanos con bloqueo citocinético con citochalasina B; comparándolo con el daño genotóxico inducido por rayos X. Posteriormente se han admin...

  15. Digital Smile Design concept delineates the final potential result of crown lengthening and porcelain veneers to correct a gummy smile.

    Science.gov (United States)

    Trushkowsky, Richard; Arias, David Montalvo; David, Steven

    2016-01-01

    Prior to initiating any treatment, it is necessary to visualize the desired outcomes. It then becomes possible to formulate the steps required to achieve this result. Digital Smile Design (DSD) utilizes patient input and information gathered through diagnostic procedures to create an esthetic treatment scheme. In the case presented here, the NYUCD Esthetic Evaluation Form, intraoral and extraoral photographs, mounted diagnostic casts, physical examination, and radiographs were the diagnostic modalities. The gathered information served as a starting point for a wax-up and intraoral mock-up. This case report demonstrates how the DSD served as a template for crown lengthening procedures and design of the final porcelain veneer restorations.

  16. Anatomy and Disorders of the Oral Cavity of Chinchillas and Degus.

    Science.gov (United States)

    Mans, Christoph; Jekl, Vladimir

    2016-09-01

    Dental disease is among the most common causes for chinchillas and degus to present to veterinarians. Most animals with dental disease present with weight loss, reduced food intake/anorexia, and drooling. Degus commonly present with dyspnea. Dental disease has been primarily referred to as elongation and malocclusion of the cheek teeth. Periodontal disease, caries, and tooth resorption are common diseases in chinchillas, but are missed frequently during routine intraoral examination, even performed under general anesthesia. A diagnostic evaluation, including endoscopy-guided intraoral examination and diagnostic imaging of the skull, is necessary to detect oral disorders and to perform the appropriate therapy. PMID:27497209

  17. Lava ultimate resin nano ceramic for CAD/ CAM: customization case study.

    Science.gov (United States)

    Koller, M; Arnetzl, G V; Holly, L; Arnetzl, G

    2012-01-01

    Lava Ultimate Resin Nano Ceramic (RNC) blocks are innovative new CAD/CAM materials that make it possible to achieve superior esthetic results in easy steps. The blocks are made of nano ceramic particles embedded in a highly cured resin matrix. Therefore, composite materials can be used to characterize and adjust resin nano ceramic restorations after milling. The milled RNC restorations can be individualized intra-orally or extra-orally, either before or after insertion. Unlike conventional ceramic restorations, customization and glaze firing is neither necessary nor possible with RNC restorations. This opens up the opportunity for intraoral individualization and adaptation of the restorations. PMID:22891419

  18. Cone beam computed tomography aided diagnosis and treatment of endodontic cases: Critical analysis.

    Science.gov (United States)

    Yılmaz, Funda; Kamburoglu, Kıvanç; Yeta, Naz Yakar; Öztan, Meltem Dartar

    2016-07-28

    Although intraoral radiographs still remain the imaging method of choice for the evaluation of endodontic patients, in recent years, the utilization of cone beam computed tomography (CBCT) in endodontics showed a significant jump. This case series presentation shows the importance of CBCT aided diagnosis and treatment of complex endodontic cases such as; root resorption, missed extra canal, fusion, oblique root fracture, non-diagnosed periapical pathology and horizontal root fracture. CBCT may be a useful diagnostic method in several endodontic cases where intraoral radiography and clinical examination alone are unable to provide sufficient information. PMID:27551342

  19. Cryosurgery for hemangiomas of the body surface and oral cavity.

    Science.gov (United States)

    Ohtsuka, H; Shioya, N; Tanaka, S

    1980-06-01

    The indications for and limitations of cryosurgery for various types of hemangiomas on the body surface or in the intraoral region are reported based on our clinical experience. In our opinion, cryosurgery is not the method of choice in the management of hemangiomas but is useful under certain conditions, as with a localized cavernous under certain conditions, as with a localized cavernous hemangioma in the facial or intraoral region. It is also valuable for strawberry marks with bleeding or infection and may be acceptable for small port-wine stains; in the treatment of extensive port-wine stains, a resulting hypertrophic scar or depigmentation may present difficulties. PMID:7436280

  20. Enhancing Facial Esthetics by Other Modalities

    Directory of Open Access Journals (Sweden)

    Thotapalli Suman

    2011-01-01

    Full Text Available Preprosthetic surgeries are generally dealt with surgical procedures performed to facilitate fabrication of prosthesis or improve the prognosis of prosthodontic care. In general the surgical procedures include various soft and hard tissue procedures which are restricted intraorally. Maxillofacial prosthodontics is not restricted to restorations performed intra-orally. Various extraoral surgical procedures have come into light in the recent past which helps to improve the prosthodontic outcome of craniofacial region. The current paper tries to elaborate various minimally invasive cosmetic reconstructive procedures and materials available in recent times.