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Sample records for malpositioned anterior teeth

  1. Complex aesthetic treatment on anterior maxillary teeth with malposition

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    Febriastuti Febriastuti

    2008-12-01

    Full Text Available Background: Complex aesthetic treatment on anterior teeth involves more than one caries tooth with malformed shape and malposition. Purpose: The purpose of this paper is to find the alternative treatment for anterior maxillary teeth with malposition. Case: In this case, a 25 year-old man with a peg shaped teeth and caries on several teeth and malposition can be treated with complex aesthetic treatment. Case management: Endodontic pulpectomy treatment on anterior maxillary teeth and post construction with splint porcelain fused to metal crowns on 11, 12, and 21, 22 to correct the shape and position into normal position. Conclusion: Malformed and malpositioned teeth with caries can be treated with complex aesthetic treatment.

  2. Restoring primary anterior teeth.

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    Waggoner, William F

    2002-01-01

    A variety of esthetic restorative materials are available for restoring primary incisors. Knowledge of the specific strengths, weakness, and properties of each material will enhance the clinician's ability to make the best choice of selection for each individual situation. Intracoronal restorations of primary teeth may utilize resin composites, glass ionomer cements, resin-modified ionomers, or polyacid-modified resins. Each has distinct advantages and disadvantages and the clinical conditions of placement may be a strong determining factor as to which material is utilized. Full coronal restoration of primary incisors may be indicated for a number of reasons. Crowns available for restoration of primary incisors include those that are directly bonded onto the tooth, which generally are a resin material, and those crowns that are luted onto the tooth and are some type of stainless steel crown. However, due to lack of supporting clinical data, none of the crowns can be said to be superior to the others under all circumstances. Though caries in the mandibular region is rare, restorative solutions for mandibular incisors are needed. Neither stainless steel crowns nor celluloid crown forms are made specifically for mandibular incisors. Many options exist to repair carious primary incisors, but there is insufficient controlled, clinical data to suggest that one type of restoration is superior to another. This does not discount the fact that dentists have been using many of these crowns for years with much success. Operator preferences, esthetic demands by parents, the child's behavior, and moisture and hemorrhage control are all variables which affect the decision and ultimate outcome of whatever restorative treatment is chosen.

  3. Positioning of anterior teeth in removable dentures

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    Strajnić Ljiljana

    2002-01-01

    Full Text Available Introduction The aim of this paper was to present methods of placement of artificial anterior teeth in edentulous individuals. The following review takes account of the majority of papers published during the last 100 years. The review has been divided into sections regarding the method used to determine the position of artificial anterior teeth. Geometric aspect Gysi (1895-1920 produced the first scientific theory about the position of artificial anterior teeth. Physiognomic theory The aim of this theory is to find the most natural position for artificial anterior teeth for each individual. Camper's "face angle" as a physiognomic criterion, has been introduced in papers of Wehrli (1961, Marxhors (1966, Tanzer (1968, Lombardi (1973. Esthetic aspect Important names in the field of dental esthetics are: Schön and Singer (1961, Arnheim (1965, Krajiček (1969, Tanzer (1968, Lombardi (1973, Goldstein (1976. They have introduced principles of visual aspects for selection of contours, dimension and position of artificial anterior teeth. Constitution aspect Flagg (1880, Williams (1913 and Hrauf (1957, 1958, have considered body constitution and individual characteristics regarding position of artificial anterior teeth. Physiological theory In 1971, Marxhors pointed to the fact that the position of artificial teeth corresponds with the function of the surrounding soft tissue and from the aspect of physiognomy as well. Phonetic aspect According to Silverman (1962 artificial anterior teeth are nearest when we pronounce the sound "S". Cephalometrical research Rayson (1970, Watson (1989, Strajnić Lj. (1999, Bassi F. (2001 have presented cephalometric radiographic analyses of natural anterior teeth compared with cephalometric radiographic analyses of artificial anterior teeth. A review of dental literature shows several factors suggesting modalities which should determine the position of artificial anterior teeth. Numerous methods have been designed for

  4. [Esthetic restorations of primary anterior teeth].

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    Elqadir, A Jamil; Shapira, J; Ziskind, K; Ram, D

    2013-04-01

    Esthetic treatment of primary teeth is one of the greatest challenges to pediatric dentists. A variety of restorative options using full coverage are available for anterior primary teeth. In the last half century the emphasis on treatment of severely decayed primary teeth shifted from extraction to restoration. In the past, restorations consisted of placement of stainless steel crowns on severely decayed teeth. However, they are esthetically unacceptable today. Over the last decade parents expect a higher esthetic standard for their children's primary teeth. Thus, the restoration should provide esthetic appearance and durability in addition to restoring function. The purpose of this review is to describe the types of full coverage options for anterior primary teeth currently available.

  5. Concrescent triplets involving primary anterior teeth

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    Urvashi Sharma

    2013-01-01

    Full Text Available Odontogenesis is a complex process wherein more than 200 genes are known to play a significant role in tooth development. An imbalance can lead to an abnormality in the number, size, shape or structure of the developing tooth/teeth. The presence of an extra dental lamina forms a supernumerary tooth. The supernumerary teeth are of two types: A rudimentary tooth where the supernumerary tooth does not resemble any tooth in the normal series or a supplemental tooth in which this anomalous tooth resembles one in the normal series. It is also very rare to encounter triple teeth in primary dentition. The union of these teeth may be through fusion, gemination, concrescence or a combination of fusion and gemination. Presented is a rare case of concrescence involving maxillary deciduous incisors and a supplemental tooth in a 7-year-old boy. The differential diagnosis, etiology, and complications of primary anterior triple teeth are discussed.

  6. An overlay partial denture to restore worn mandibular anterior teeth.

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    Samant, Asha; DeSciscio, Peter

    2014-01-01

    Restoring worn anterior mandibular teeth is a challenge, especially when teeth are small, esthetics are a concern, the long-term prognosis is questionable, and/or patient finances are an issue. This article describes an alternate treatment for a patient with a collapsed bite, missing posterior mandibular teeth, an ill-fitting complete maxillary denture with poor esthetics, and irregular, worn mandibular anterior teeth.

  7. Indirect veneer treatment of anterior maxillary teeth with enamel hypoplasia

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    Devi Eka Juniarti

    2010-09-01

    Full Text Available Background: Nowadays, aesthetic rehabilitation becomes a necessity. It is affected by patient’s background, especially career, social and economic status. The aesthetic abnormality of anterior teeth i.e discoloration, malposition and malformation can affect patient’s appearance, especially during smile. These dental abnormalities, as a result, can decrease patient’s performance. Dental malformation, for instance, can be caused by developmental tooth defect, such as enamel hypoplasia. Enamel hypoplasia is a developmental defect caused by the lack of matrix amount which leads to thin and porous enamel. Enamel hypoplasia can also be caused by matrix calcification disturbance starting from the formation and development of enamel matrix causing defect and permanent changes which can occur on one or more tooth. Purpose: The aim of the study is to improve dental discoloration and tooth surface texture on anterior maxillary teeth with enamel hypoplasia by using indirect veneer with porcelain material. Case: A 20 years-old woman with enamel hypoplasia came to the Dental Hospital, Faculty of Dentistry Airlangga University. The patient wanted to improve her anterior maxillary teeth. It is clinically known that there were some opaque white spots (chalky spotted and porous on anterior teeth’s surface. Case management: Indirect veneer with porcelain material had been chosen as a restoration treatment which has excellent aesthetics and strength, and did not cause gingival irritation. As a result, the treatment could improve the confidence of the patient, and could also make their function normal. Conclusion: Indirect veneer is an effective treatment, which can improve patient’s appearance and self confidence.Latar belakang: Saat ini perbaikan estetik menjadi suatu kebutuhan. Kebutuhan akan estetik dipengaruhi latar belakang penderita, terutama karir, status sosial dan ekonomi. Hal ini disebabkan, kelainan estetik seperti diskolorasi, malposisi

  8. Restoring primary anterior teeth: updated for 2014.

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    Waggoner, William F

    2015-01-01

    The purpose of this paper was to review the current literature associated with the techniques and materials for the restoration of primary anterior teeth and make clinical recommendations based upon the available literature. A variety of esthetic restorative materials are available to utilize for restoring primary incisors. Awareness of the specific strengths, weakness, and properties of each material can enhance the clinician's ability to make the best choice of selection for each individual situation. Intracoronal restorations of primary teeth may utilize resin composites, glass ionomer cements, resin-modified ionomers, or polyacid-modified resins. Full coronal restoration of primary incisors may be indicated for a number of reasons. Crowns available for restoration of primary incisors include those that are directly bonded onto the tooth, which generally are a resin material, and crowns that are luted onto the tooth and are either some type of stainless steel or zirconia crown. There is insufficient controlled, clinical data to suggest that one type of restoration is superior to another. Operator preferences, esthetic demands by parents, the child's behavior, the amount of tooth structure remaining, and moisture and hemorrhage control are all variables that affect the decision and ultimate outcome of whatever restorative solution is chosen.

  9. Modified Anchor Shaped Post Core Design for Primary Anterior Teeth

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    R. Rajesh; Kusai Baroudi; K. Bala Kasi Reddy; Praveen, B. H.; V. Sumanth Kumar; Amit, S

    2014-01-01

    Restoring severely damaged primary anterior teeth is challenging to pedodontist. Many materials are tried as a post core but each one of them has its own drawbacks. This a case report describing a technique to restore severely damaged primary anterior teeth with a modified anchor shaped post. This technique is not only simple and inexpensive but also produces better retention.

  10. Modified Anchor Shaped Post Core Design for Primary Anterior Teeth

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    R. Rajesh

    2014-01-01

    Full Text Available Restoring severely damaged primary anterior teeth is challenging to pedodontist. Many materials are tried as a post core but each one of them has its own drawbacks. This a case report describing a technique to restore severely damaged primary anterior teeth with a modified anchor shaped post. This technique is not only simple and inexpensive but also produces better retention.

  11. Modified anchor shaped post core design for primary anterior teeth.

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    Rajesh, R; Baroudi, Kusai; Reddy, K Bala Kasi; Praveen, B H; Kumar, V Sumanth; Amit, S

    2014-01-01

    Restoring severely damaged primary anterior teeth is challenging to pedodontist. Many materials are tried as a post core but each one of them has its own drawbacks. This a case report describing a technique to restore severely damaged primary anterior teeth with a modified anchor shaped post. This technique is not only simple and inexpensive but also produces better retention.

  12. Restoration of primary anterior teeth: review of the literature.

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    Lee, Jacob K

    2002-01-01

    This paper reviews the published data on restorations of primary anterior teeth. The discussion includes Class III restorations, Class V restorations, various forms of full coronal restorations, atraumatic restorative technique (ART) and recommendations for future research.

  13. Periodontics: 8. Periodontal problems associated with compromised anterior teeth.

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    Byrne, Patrick J; Irwin, Chris; Mullally, Brian; Allen, Edith; Ziada, Hassan

    2008-01-01

    Periodontal disease can significantly impact on the appearance of the anterior teeth. Prior to any definitive treatment, stabilization of the periodontal condition is a requirement. Treatment options can range from the placement of simple restorations, through orthodontic realignment, to the extraction and replacement of hopeless teeth. Each treatment plan must be individually tailored to the patient and level of periodontal disease, and must include provision for maintenance periodontal therapy. Periodontal diseases may compromise the prognosis of anterior teeth. Management is challenging and clinicians should take into consideration the short and long-term survival in treatment planning.

  14. The management of over closured anterior teeth due to attrition

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    Eha Djulaeha

    2009-12-01

    Full Text Available Background: Tooth is the hardest tissue in human body, that can be injured because of attrition process. For old people, denture attrition process is caused by psysiological process relating with the mastication function which also supported by some bad habits such an bruxism, premature contact, and consuming habit of abrasive food. Attrition or abrasion can also be happened with patien’t dentition who does not have teeth subtutition for long time due the lost of their maxillary as well as mandibulary. The pasient will loose their vertical dimension of occlusion, injure, and the lower jaw becomes over closed which is called over closure. Purpose: This article reported the management of over closured anterior teeth due to attrition. Case: a seventy six year old woman patient came to Prosthodontic Clinic in Faculty of Dentistry, Airlangga University, to rehabilitate her upper and lower severe attrited anterior teeth and her posterior teeth. The patient has experienced of wearing acrylic removable mandibular partial denture ten years ago. Unfortunaly, the denture was uncomfortable, and she did not wear it anymore since five years ago. Case management: The severe attrition of anterior teeth with the lost of occlusal vertical dimension can be treated by improving the occlusal vertical dimension gradually. The treatment is then followed by the increasing of the height of the anterior teeth by lengthening the crown teeth of upper jaw with 12 units of span bridge and the acrylic removable partial denture of lower jaw. Conclusion: The severe attrition of anterior teeth with the lost of occlusal vertical dimension can be treated by improving the occlusal vertical dimension gradually, using long span bridge and acrylic removable partial denture.

  15. Cardiac Malpositions

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    Yoo, Shi Joon; Im, Chung Gie; Yeon, Kyung Mo; Hasn, Man Chung [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1979-06-15

    Cardiac Malposition refers to any position of the heart other than a left-sided heart in a situs solitus individual. Associated cardiac malformations are so complex that even angiocardiographic and autopsy studies may not afford an accurate information. Although the terms and classifications used to describe the internal cardiac anatomy and their arterial connections in cardiac malpositions differ and tend to be confusing, common agreement exists on the need for a segmental approach to diagnosis. Authors present 18 cases of cardiac malpositions in which cardiac catheterization and angiocardiography were done at the Department of Radiology, Seoul National University Hospital between 1971 and 1979. Authors analyzed the clinical, radiographic, operative and autopsy findings with the emphasis on the angiocardiographic findings. The results are as follows: 1. Among 18 cases with cardiac malpositions, 6 cases had dextrocardia with situs inversus, 9 cases had dextrocardia with situs solitus and 3 cases had levocardia with situs inversus. 2. There was no genuine exception to visceroatrial concordance rule. 3. Associated cardiac malpositions were variable and complex with a tendency of high association of transposition and double outlet varieties with dextrocardia in situs solitus and levocardia in situs inversus. Only one in 6 cases of dextrocardia with situs inversus had pure transposition. 4. In two cases associated pulmonary atresia was found at surgery which was not predicted by angiocardiography. 5. Because many of the associated complex lesions can be corrected surgically provided the diagnosis is accurate, the selective biplane angiocardiography with or without cineradiography is essential.

  16. The significance of biometric parameters in determining anterior teeth width

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    Strajnić Ljiljana

    2013-01-01

    Full Text Available Background/Aim. An important element of prosthetic treatment of edentulous patients is selecting the size of anterior artificial teeth that will restore the natural harmony of one’s dentolabial structure as well as the whole face. The main objective of this study was to determine the correlation between the inner canthal distance (ICD and interalar width (IAW on one side and the width of both central incisors (CIW, the width of central and lateral incisors (CLIW, the width of anterior teeth (ATW, the width between the canine cusps (CCW, which may be useful in clinical practice. Methods. A total of 89 subjects comprising 23 male and 66 female were studied. Their age ranged from 19 to 34 years with the mean of 25 years. Only the subjects with the preserved natural dentition were included in the sample. All facial and intraoral tooth measurements were made with a Boley Gauge (Buffalo Dental Manufacturing Co., Brooklyn NY, USA having a resolution of 0.1mm. Results. A moderate correlation was established between the interalar width and combined width of anterior teeth and canine cusp width (r = 0.439, r = 0.374. A low correlation was established between the inner canthal distance and the width of anterior teeth and canine cusp width (r = 0.335, r = 0.303. The differences between the two genders were highly significant for all the parameters (p < 0.01. The measured facial distances and width of anterior teeth were higher in men than in women. Conclusion. The results of this study suggest that the examined interalar width and inner canthal distance cannot be considered reliable guidelines in the selection of artificial upper anterior teeth. However, they may be used as a useful additional factor combined with other methods for objective tooth selection. The final decision should be made while working on dentures fitting models with the patient’s consent.

  17. Is biologic width of anterior and posterior teeth similar?

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    Amir Alireza Rasouli Ghahroudi

    2014-09-01

    Full Text Available The biologic width (BW includes attached epithelial cells and connective tissue attachment complex being very important in the periodontal health during prosthetic treatments as invading this zone can cause bone resorption and gingival recession. The present study investigated biologic width values in the normal periodontium in anterior and posterior teeth. 30 patients that referred from restorative department to periodontics department of Tehran University of medical sciences who need crown lengthening procedure on their teeth with no history of orthodontic, prosthodontic and periodontal treatment were randomly enrolled in this cross-sectional trial. Sulcus depths (SD as well as the distance between free gingival margin and the bone crest (FB of anterior and posterior teeth were measured by UNC-15 probe and compared. periodontium thickness was also assessed. The data were subjected to Student t test. Mean BW in the 43 anterior and 47 posterior teeth was measured and not significantly different (1.4651±0.39 mm vs. 1.6312±0.49 mm was observed; however, BW was significantly more in the teeth with thick periodontium compared to those with thin periodontium (1.703±0.5 vs. 1.408±0.35; P=0.002. BW not only is different in individuals but also could be dissimilar in different teeth and should be calculated independently prior to restorative treatments.

  18. Esthetic crown lengthening for maxillary anterior teeth.

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    Sonick, M

    1997-08-01

    In the maxillary anterior region, the gingival labial margin position is an important parameter in the achievement of an ideal smile. The relationship between the periodontium and the restoration is critical if gingival health and esthetics are to be achieved. Periodontal therapy is a necessary and useful adjunct when any anterior restoration is undertaken. Anterior surgical crown lengthening may be undertaken to avoid restorative margin impingement on the biologic width. Crown lengthening is also used to alter the gingival labial profiles. This article discusses the esthetic parameters of ideal gingival labial positions and presents a classification of crown-lengthening procedures and the procedure for a two-stage crown-lengthening technique. The two-stage crown-lengthening technique is surgically precise because healing is predictable.

  19. A review on anterior teeth restorations

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    Gaurav Solanki

    2014-12-01

    Full Text Available Restorations of teeth have been a need of time since very long. As the time have passed, there have been different advances in the field of restorative materials and tooth restorations. Many newer restorative materials are now available to us for the purpose of tooth restorations still some of the older materials are materials of choice for a sector of society. This article focuses on few such restorative materials and also tells us about a few patents granted in such field.

  20. Esthetic removable partial denture design in replacing maxillary anterior teeth.

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    Oh, Won-Suk; Basho, Shveta

    2010-01-01

    Prosthodontic rehabilitation of missing maxillary anterior teeth requires special consideration to restore function and esthetics. This case report describes the prosthodontic management of a patient who lost three maxillary incisors due to a motor vehicle accident. A rotational path removable partial denture was constructed, for which a proximal undercut was created by means of a composite buildup to provide the retention for the prosthesis.

  1. Relação entre dentes mal posicionados e a condição dos tecidos periodontais Association between malpositioned teeth and periodontal disease

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    Estela Santos Gusmão

    2011-08-01

    Full Text Available OBJETIVO: avaliar pacientes encaminhados à Associação Brasileira de Odontologia, Seção Pernambuco, para tratamento periodontal, a fim de identificar as anomalias de posição dentária presentes na amostra, bem como verificar se há relação entre essas anomalias e a condição dos tecidos periodontais. MÉTODOS: a amostra foi constituída por 90 indivíduos, com idades de 15 a 69 anos. Inicialmente, cada participante foi submetido à identificação dos tipos de anomalias de posição dentária através de exame de inspeção visual e, posteriormente, à avaliação da condição periodontal, registrada pelos seguintes parâmetros clínicos: sangramento gengival na sondagem, perda de inserção periodontal e profundidade de sondagem. Na análise bivariada utilizou-se o teste Qui-quadrado para calcular o nível de significância das associações testadas. RESULTADOS: foram identificados vários tipos de alterações na posição dentária dos pacientes examinados, sendo os mais significativos: giroversão (86,7%, apinhamento (52,2% e molar inclinado mesialmente (48,9%. Em todos os participantes foram registradas alterações periodontais relacionadas a essas anomalias: 100% apresentaram sangramento gengival; 67,8%, recessão gengival; 54,4%, hiperplasia gengival e 28,9%, periodontite crônica.Verificou-se associação significativa entre a recessão gengival e as variáveis dente vestibularizado e proclinação excessiva dos incisivos superiores; e entre a periodontite crônica e molar inclinado mesialmente, dentes apinhados, proclinação excessiva dos incisivos superiores e inferiores, e diastema (pOBJECTIVE: To identify malpositioned teeth in patients referred to periodontal treatment in the Brazilian Association of Dentistry, Pernambuco Division and evaluate the association of these irregularities with periodontal health. METHODS: The sample comprised 90 individuals aged 15 to 69 years. First, each participant was examined to identify

  2. Endodontic-orthodontic management of fractured anterior teeth.

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    Delivanis, P; Delivanis, H; Kuftinec, M M

    1978-09-01

    A case history is presented of a 10-year-old patient, who accidentally injured her maxillary central incisor. The fracture of the crown extended 2 mm below the crest of the alveolar bone. After a pulpotomy was done as a temporary measure, orthodontic appliances were placed by bonding brackets on the maxillary anterior teeth and fitting a sectional arch wire to extrude the fractured tooth. After successful extrusion, the fracture line was brought above the level of alveolar bone where successful restoration of the tooth by the acid-etch method could be accomplished.

  3. Esthetic Rehabilitation of Anterior Teeth with Laminates Composite Veneers

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    Dino Re

    2014-01-01

    Full Text Available No- or minimal-preparation veneers associated with enamel preservation offer predictable results in esthetic dentistry; indirect additive anterior composite restorations represent a quick, minimally invasive, inexpensive, and repairable option for a smile enhancement treatment plan. Current laboratory techniques associated with a strict clinical protocol satisfy patients’ restorative and esthetic needs. The case report presented describes minimal invasive treatment of four upper incisors with laminate nanohybrid resin composite veneers. A step-by-step protocol is proposed for diagnostic evaluation, mock-up fabrication and trial, teeth preparation and impression, and adhesive cementation. The resolution of initial esthetic issues, patient satisfaction, and nice integration of indirect restorations confirmed the success of this anterior dentition rehabilitation.

  4. Esthetic rehabilitation of anterior teeth with laminates composite veneers.

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    Re, Dino; Augusti, Gabriele; Amato, Massimo; Riva, Giancarlo; Augusti, Davide

    2014-01-01

    No- or minimal-preparation veneers associated with enamel preservation offer predictable results in esthetic dentistry; indirect additive anterior composite restorations represent a quick, minimally invasive, inexpensive, and repairable option for a smile enhancement treatment plan. Current laboratory techniques associated with a strict clinical protocol satisfy patients' restorative and esthetic needs. The case report presented describes minimal invasive treatment of four upper incisors with laminate nanohybrid resin composite veneers. A step-by-step protocol is proposed for diagnostic evaluation, mock-up fabrication and trial, teeth preparation and impression, and adhesive cementation. The resolution of initial esthetic issues, patient satisfaction, and nice integration of indirect restorations confirmed the success of this anterior dentition rehabilitation.

  5. The relationship between the severity of malposition of the frontal teeth and periodontal health in age 15-21 and 35-44.

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    Pugaca, Jolanta; Urtane, Ilga; Liepa, Andra; Laurina, Zane

    2007-01-01

    In the recent past there has been an increase in the number of adults seeking orthodontic treatment therefore special attention to periodontal status of these patients needs more careful evaluation. Periodontal considerations in adult orthodontic treatment are increasingly important as patients become older. The aim of the study was to assess the interrelationship between the severity of malposition of frontal teeth with periodontal health considering to age in Latvian population. The data were analyzed from a detailed crossectional study in Latvian population. Selected samples consisted of two age groups: 15-21 (n=323) and 35-44 (n=286) years old. For the assessment of periodontal health CPI scores was analyzed for upper frontal sextant. For assessment of malocclusion 2 components of ICON index were used: upper arch crowding and incisor overbite. The differences in the distribution of ICON index and CPI index between age groups were tested using Pearson chi(2)test. Statistical significance of the differences in the mean values was tested using t-test. Possible interaction between above mentioned indexes was tested by means of analysis of variance. Upper arch crowding and incisor overbite severity increase with age was statistical significant. There was statistically significant interrelation between upper arch crowding degree and incisor overbite and CPI scores severity in the age 15-21 and was not in the age 35-44. However comparing higher degree of the crowding and overbite severity to percent of subjects with bleeding, calculus and periodontal pockets greater percents of measurements were in older group. 1. Severity of upper arch crowding and overbite statistically significant increased with age with remarkable increasing of periodontal problems. 2. Interrelation between severity of upper arch crowding, incisor overbite and CPI scores was statistically significant in age group 15-21.

  6. Effect of tongue thrust swallowing on position of anterior teeth.

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    Jalaly, Tahereh; Ahrari, Farzaneh; Amini, Foroozandeh

    2009-01-01

    There is no consensus about the effect of tongue thrusting on incisor position. The purpose of this study was to evaluate the position of anterior teeth in growing children with tongue thrust swallowing. In the present study 193 subjects with an age range of 9 to 13 years participated. All the patients were examined by a trained investigator and those having tongue thrust swallowing were selected and the position of their anterior teeth was compared with a control group consisting of 36 subjects with normal occlusion. Data was analyzed by independent sample t-test. Among the 193 students who were examined in this study, 10 cases (5%) were diagnosed to be tongue thrusters. Overjet was significantly increased in tongue thrust individuals (P 0.05). The results indicated that tongue thrust may have an environmental effect on dentofacial structures. Considering the high incidence of tongue thrust in orthodontic patients, it is suggested that dental practitioners observe patients of all ages and those in all stages of orthodontic treatment for evidence of tongue thrust swallowing.

  7. Anterior makeover on fractured teeth by simple composite resin restoration

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    Eric Priyo Prasetyo

    2011-09-01

    Full Text Available Background: In daily practice dentists usually treat tooth fractures with more invasive treatments such as crown, veneer and bridges which preparation require more tooth structure removal. While currently there is trend toward minimal invasive dentistry which conserves more tooth structure. This is enhanced with the vast supply of dental materials and equipment in the market, including restorative materials. Provided with these supporting materials and equipment and greater patient’s demand for esthetic treatment, dentists must aware of the esthetics and basic principle of conserving tooth which should retain tooth longevity. Purpose: This article showed that a simple and less invasive composite resin restoration can successfully restore anterior esthetic and function of fractured teeth which generally treated with more invasive treatment options. Case: A 19 year-old female patient came with fracture on 21 and 22. This patient had a previous history of dental trauma about nine years before and was brought to a local dentist for debridement and was given analgesic, the involved teeth were not given any restorative treatment. Case management: The fractured 21 and 22 were conventionally restored with simple composite resin restoration. Conclusion: Fracture anterior teeth would certainly disturbs patient’s appearance, but these teeth could be managed conservatively and economically by simple composite resin restoration.Latar belakang: Dalam praktek sehari-hari pada umumnya dokter gigi merawat fraktur dengan restorasi invasif seperti mahkota, veneer dan jembatan yang semuanya memerlukan pengambilan jaringan gigi lebih banyak, sedangkan saat ini trend perawatan gigi lebih menuju kearah invasif minimal yang mempertahankan jaringan gigi sebanyak mungkin. Keadaan ini ditunjang oleh tersedianya berbagai macam bahan dan peralatan kedokteran gigi di pasaran, termasuk bahan restorasi. Dengan tersedianya bahan dan peralatan yang mendukung serta tingginya

  8. Replacement of Missing Anterior Teeth in a Patient with Temporomandibular Disorder

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    Satheesh B. Haralur

    2014-01-01

    Full Text Available The loss of anterior teeth leads to extreme psychological trauma, along with functional and esthetic debilitations. Healthy anterior teeth play an important role of protecting the posterior teeth during excursive mandibular movement. Loss of anterior teeth induces posterior interference with extended disocclusion time. Posterior disocclusion is critical to remove the harmful force on the teeth temporomandibular joint and eliminate muscle hypertonicity. Occlusal interference is considered as contributing factor to temporomandibular disorder (TMD symptoms. Prosthesis design should eliminate deleterious tooth contacts. Establishing optimum anterior guidance is a key to establishing harmonious functional occlusion in addition to the correction of the esthetic and phonetic disabilities. This case report explains the steps involved in the rehabilitation of the TMD patient with loss of maxillary anterior teeth.

  9. Angle Class I malocclusion with anterior open bite treated with extraction of permanent teeth

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    Matheus Melo Pithon

    2013-04-01

    Full Text Available This clinical case reports the orthodontic treatment of a Class I malocclusion with anterior open bite and bimaxillary dentoalveolar protrusion in a 28-year-old female patient. The treatment of choice was to perform tooth extractions followed by retraction of the anterior teeth, with consequent closure of the anterior open bite and better accommodation of the teeth on their bony bases. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO, representing the Category 2 - i.e., an Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth -, as part of the requisites to become a BBO diplomate.

  10. Angle Class I malocclusion with anterior open bite treated with extraction of permanent teeth.

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    Pithon, Matheus Melo

    2013-01-01

    This clinical case reports the orthodontic treatment of a Class I malocclusion with anterior open bite and bimaxillary dentoalveolar protrusion in a 28-year-old female patient. The treatment of choice was to perform tooth extractions followed by retraction of the anterior teeth, with consequent closure of the anterior open bite and better accommodation of the teeth on their bony bases. This case was presented to the Brazilian Board of Orthodontics and Facial Orthopedics (BBO), representing the Category 2 -- i.e., an Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth --, as part of the requisites to become a BBO diplomate.

  11. Replacement of Missing Anterior Teeth in a Patient with Chronic Mouth Breathing and Tongue Thrusting

    Directory of Open Access Journals (Sweden)

    Satheesh B. Haralur

    2013-01-01

    Full Text Available The loss of anterior teeth has serious functional, esthetic disabilities, in addition to compromising the patients' quality of life. Various etiologies can be attributed to the anterior tooth loss, including trauma, caries, and periodontal diseases. The chronic mouth breathing due to nasal adenoids is known to enhance the gingival and periodontal diseases. The dental literature proves the association of nasal breathing, tongue thrusting, and anterior open bite. Arch shape and tooth position are primarily determined by the equilibrium of the forces from tongue and perioral musculature. Increased force from tongue musculature in the tongue thrusting patient leads to flaring of anterior teeth, making them susceptible for periodontal and traumatic tooth loss. Replacement of the anterior teeth in this patient will also help in restoration of anterior guidance, which is critical for the health of temporomandibular joint, posterior teeth, and musculature.

  12. Replacement of missing anterior teeth in a patient with chronic mouth breathing and tongue thrusting.

    Science.gov (United States)

    Haralur, Satheesh B; Al-Qahtani, Ali Saad

    2013-01-01

    The loss of anterior teeth has serious functional, esthetic disabilities, in addition to compromising the patients' quality of life. Various etiologies can be attributed to the anterior tooth loss, including trauma, caries, and periodontal diseases. The chronic mouth breathing due to nasal adenoids is known to enhance the gingival and periodontal diseases. The dental literature proves the association of nasal breathing, tongue thrusting, and anterior open bite. Arch shape and tooth position are primarily determined by the equilibrium of the forces from tongue and perioral musculature. Increased force from tongue musculature in the tongue thrusting patient leads to flaring of anterior teeth, making them susceptible for periodontal and traumatic tooth loss. Replacement of the anterior teeth in this patient will also help in restoration of anterior guidance, which is critical for the health of temporomandibular joint, posterior teeth, and musculature.

  13. Comparative Evaluation of Maxillary and Mandibular Anterior Teeth Width with the Length of Index and Little Finger

    National Research Council Canada - National Science Library

    Ahila, S C; Vaishnavi, Prabhakar; Muthu Kumar, B

    2014-01-01

    .... There is no reliable method for selection of anterior teeth etc. To evaluate and compare the width of the maxillary and mandibular anterior teeth with the length of the index and little fingers...

  14. Evaluation of Survival Time of Tooth Color Dental Materials in Primary Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Behjat-Al-Molook Ajami

    2013-01-01

    Full Text Available Introduction: In restorative dentistry, selecting the proper material is an important factor for clinical success. The objective of this study was clinical evaluation of survival time of three tooth color materials in primary anterior teeth. Methods: In this interventional clinical trial study, 94 deciduous anterior teeth (36 teeth in boys, 58 teeth in girls belonging to 3-5 year old children in Pediatric Department of Mashhad Faculty of Dentistry, Iran were selected. Selective dental materials included compoglass, glass-ionomer Fuji II LC, and composite resin. The data were analyzed with Kaplan–Meyer and Log rank test. Results: compoglass had the highest survival time in comparison with composite and glass-ionomer. Nine months retention rate for teeth restored with compoglass, composite resin and glass-ionomer were estimated: 95%, 21%, and 12.5%, respectively. Conclusion: Compoglass can be a suitable material for anterior primary teeth restoration

  15. Evaluation of Survival Time of Tooth Color Dental Materials in Primary Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Taraneh Movahhed

    2012-09-01

    Full Text Available Introduction: In restorative dentistry, selecting the proper material is an important factor for clinical success. The objective of this study was clinical evaluation of survival time of three tooth color materials in primary anterior teeth. Methods: In this interventional clinical trial study, 94 deciduous anterior teeth (36 teeth in boys, 58 teeth in girls belonging to 3-5 year old children in Pediatric Department of Mashhad Faculty of Dentistry, Iran were selected. Selective dental materials included compoglass, glass-ionomer Fuji II LC, and composite resin. The data were analyzed with Kaplan–Meyer and Log rank test. Results: compoglass had the highest survival time in comparison with composite and glass-ionomer. Nine months retention rate for teeth restored with compoglass, composite resin and glass-ionomer were estimated: 95%, 21%, and 12.5%, respectively. Conclusion: Compoglass can be a suitable material for anterior primary teeth restoration.

  16. The aesthetic treatment for anterior teeth with lost crown by endorestoration

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    Nanik Zubaidah

    2009-06-01

    Full Text Available Background: The aesthetic has an important role in social life, especially the anterior teeth. The aesthetic abnormality of anterior teeth i.e. discoloration, malpotition or the anterior teeth with crown damage for more than one third or all part of crown is lost due to caries or other causes, will influence its appearance especially during smile. Purpose: The aim of this case report, therefore, is to show how teeth with clinical crown lost or only the root left still can be treated by endorestoration treatment in order to reconstruct the shape and function of the teeth similar to the original ones. Case: Female 52 years old with the lost crown of anterior teeth. The patient did not want her teeth to be extracted. Case Management: The abnormality of these teeth are still able to be reconstructed by endorestoration i.e. endodontic treatment with post and core insertion in the root canal will increase its retention and recovery by the porcelain crown fused to metal to recover the original formation and aesthetic and thus has the normal refunction. The treatment, it improve the confidence of the patient, and also can function normally. The patient did not feel pain. Ronsenography showed the periapical lesion diminished, the neighbor gingival was going better in both function and color. Conclusion: Endorestoration treatment on the anterior teeth with lost crown could recover the normal function, dental aesthetic and self confidence.

  17. Acetabular Dysplasia and Surgical Approaches Other Than Direct Anterior Increases Risk for Malpositioning of the Acetabular Component in Total Hip Arthroplasty

    DEFF Research Database (Denmark)

    Gromov, Kirill; Greene, Meridith E; Huddleston, James I

    2016-01-01

    BACKGROUND: Persistent acetabular dysplasia (AD) after periacetabular osteotomy has been hypothesized to increase the risk for malpositioning of the acetabular component. In this study, we investigate whether AD is an independent risk factor for cup malpositioning during primary total hip...... arthroplasty (THA). METHODS: Patient demographics, surgical approach, presence of AD assessed using the lateral center-edge angle, and acetabular cup positioning determined using Martell Hip Analysis Suite were investigated in 836 primary THA patients enrolled in a prospective multicenter study. RESULTS: We...

  18. Human enamel veneer restoration: an alternative technique to restore anterior primary teeth.

    Science.gov (United States)

    Oliveira, Luciana Butini; Tamay, Tereza Keiko; Oliveira, Marta Dutra Machado; Rodrigues, Célia Martins Delgado; Wanderley, Marcia Turolla

    2006-01-01

    Restoration of severely decayed primary teeth is a clinical challenge in Pediatric Dentistry. Among the restorative treatment options, the use of prefabricated crowns and resin composite restorations, either by means of direct or indirect techniques is mentioned in the literature. The purpose of this article is to describe the rehabilitation of primary anterior teeth in a 5-year-old patient. Dental treatment consisted on an anterior space maintainer prosthesis made with natural primary teeth, plus human dental enamel veneer (facet) restorations. The advantages of this technique are better esthetics and the natural enamel has physiologic wear and offers superficial smoothness and cervical adaptation compatible with those of the surrounding teeth.

  19. Esthetic, occlusal, and periodontal rehabilitation of anterior teeth with minimum thickness porcelain laminate veneers.

    Science.gov (United States)

    da Cunha, Leonardo Fernandes; Pedroche, Lorena Oliveira; Gonzaga, Carla Castiglia; Furuse, Adilson Yoshio

    2014-12-01

    Ceramic veneers of minimum thickness provide satisfactory esthetic outcomes while preserving the dental structure. Dental ceramics can both improve the esthetic appearance and reestablish the strength and function of teeth. In worn anterior teeth, functional surfaces, for example, anterior and lateral guidance, can be restored effectively. The characteristics of dental ceramics, such as color stability and mechanical and optical properties, make this material a good choice for indirect restorations, especially when optimum function and esthetics are required. This clinical report presents an occlusal, periodontal, and restorative solution with minimum thickness glass ceramic veneers for worn anterior teeth with multiple diastemas.

  20. Orthodontic-periodontic intervention of pathological migration of maxillary anterior teeth in advanced periodontal disease.

    Science.gov (United States)

    Panchal, Anita H; Patel, Vasumati G; Bhavsar, Neeta V; Mehta, Hardik V

    2013-05-01

    This case report presents a female patient whose chief complaint was of mobile and palatally drifted upper left central incisor which led to malalignment of upper anterior teeth. Orthodontic treatment of upper left central incisor was done with the help of 'Z' spring for the alignment of the upper anterior teeth. It was followed by splinting of upper anterior teeth to improve the stability and masticatory comfort. Regenerative periodontal surgery with Decalcified freeze dried bone allograft was done in relation to upper left central incisor.

  1. Orthodontic-periodontic intervention of pathological migration of maxillary anterior teeth in advanced periodontal disease

    Science.gov (United States)

    Panchal, Anita H.; Patel, Vasumati G.; Bhavsar, Neeta V.; Mehta, Hardik V.

    2013-01-01

    This case report presents a female patient whose chief complaint was of mobile and palatally drifted upper left central incisor which led to malalignment of upper anterior teeth. Orthodontic treatment of upper left central incisor was done with the help of ‘Z’ spring for the alignment of the upper anterior teeth. It was followed by splinting of upper anterior teeth to improve the stability and masticatory comfort. Regenerative periodontal surgery with Decalcified freeze dried bone allograft was done in relation to upper left central incisor. PMID:24049341

  2. Esthetic Rehabilitation of Primary Anterior Teeth using Temporization Material: A Novel Approach.

    Science.gov (United States)

    Gugnani, Neeraj; Pandit, I K; Gupta, Monika; Nagpal, Jyoti

    2017-01-01

    Pediatric dentists should always aim for esthetic and functional rehabilitation of decayed/traumatized primary teeth. The most common method for restoring such teeth involves the use of "strip crowns" with composites, while the recent trend is toward using other extracoronal restorations including preve-neered stainless steel crowns and zirconia crowns. All these restorative options have shown good success rates, but also have some limitations. This case series depicts novel clinical technique of using a temporization material for full-coronal restoration(s) in primary anterior teeth. This included the chair-side custom fabrication of full-coronal restoration using temporization material, which has resulted in good immediate esthetics and might be a cost-effective alternative for restoring primary anterior teeth in future. Gugnani N, Pandit IK, Gupta M, Nagpal J. Esthetic Rehabilitation of Primary Anterior Teeth using Temporization Material: A Novel Approach. Int J Clin Pediatr Dent 2017;10(1):111-114.

  3. Direct anterior composite veneers in vital and non-vital teeth: A retrospective clinical evaluation

    NARCIS (Netherlands)

    Coelho-de-Souza, F.H.; Goncalves, D.S.; Sales, M.P.; Erhardt, M.C.; Correa, M.B.; Opdam, N.J.M.; Demarco, F.F.

    2015-01-01

    OBJECTIVES: This retrospective, longitudinal clinical study investigated the performance of direct veneers using different composites (microfilledxuniversal) in vital or non-vital anterior teeth. METHODS: Records from 86 patients were retrieved from a Dental School clinic, comprising 196 direct vene

  4. Geometric and mathematical proportions and their relations to maxillary anterior teeth

    National Research Council Canada - National Science Library

    Ali Fayyad, Mohammed; Jamani, Kifah Dafi; Agrabawi, Jamal

    2006-01-01

    .... The aim of this study was to investigate the existence of the golden proportion, RED proportion, and the golden percentage between the widths of the maxillary anterior teeth in individuals with natural dentition...

  5. Evaluation of maxillary anterior teeth and their relation to the golden proportion in Malaysian population

    National Research Council Canada - National Science Library

    Al-Marzok, Maan Ibrahim; Majeed, Kais Raad Abdul; Ibrahim, Ibrahim Khalil

    2013-01-01

    ...; and to investigate the occurrence of the golden proportion of the maxillary anterior teeth. Dental casts of the maxillary arches were made in this cross-sectional study from MAHSA University College students who met the inclusion criteria...

  6. Validity of mathematical proportions in maxillary anterior teeth among Bangladeshi population

    National Research Council Canada - National Science Library

    Monwarul Aziz; Md Zakir Hossain

    2017-01-01

    Objective: To investigate the existence and suitability of mathematical proportions between the widths of maxillary anterior teeth in Bangladeshi population having an esthetic smile, with the aid of digital...

  7. Clinical comparison of various esthetic restorative options for coronal build-up of primary anterior teeth

    National Research Council Canada - National Science Library

    Duhan, Himanshu; Pandit, Inder Kumar; Srivastava, Nikhil; Gugnani, Neeraj; Gupta, Monika; Kochhar, Gulsheen Kaur

    2015-01-01

    This study was designed to compare the clinical performance of composite, strip crowns, biological restoration, and composite with stainless steel band when used for the coronal build-up of anterior teeth...

  8. Scanning electron microscopy and calcification in amelogenesis imperfecta in anterior and posterior human teeth

    OpenAIRE

    Sánchez-Quevedo, M. C.; Ceballos, G.; García, J. M.; Rodriguez, I. A.; Gómez de Ferraris, M. E.; Campos, Antonio

    2001-01-01

    Teeth fragments from members of a famil? clinically and genetically diagnosed as having amelogenesis imperfecta were studied by scanning electron microscopy and X-ray microprobe analysis to establish the morphological patterns and the quantitative concentration of calcium in the enamel of anterior (canine, incisor) and posterior (premolar and molar) teeth. The prism patterns in the enamel of teeth from both regions were parallel or irregularly decussate, with ...

  9. Evaluation of maxillary anterior teeth and their relation to the golden proportion in malaysian population

    Directory of Open Access Journals (Sweden)

    Al-Marzok Maan Ibrahim

    2013-01-01

    Full Text Available Abstract Background The maxillary anterior teeth are important in achieving pleasing dental aesthetics. Various methods are used to measure the size and form of them, including the golden proportion between their perceived widths, and the width-to-height ratio, referred to as the golden standard. The purpose of this study was conducted to evaluate whether consistent relationships exist between tooth width and height of the clinical crown dimensions; and to investigate the occurrence of the golden proportion of the maxillary anterior teeth. Methods Dental casts of the maxillary arches were made in this cross-sectional study from MAHSA University College students who met the inclusion criteria. The 49 participants represented the Malaysian population main ethnics. The dimensions of the anterior teeth and the perceived width of anterior teeth viewed from front were measured using a digital caliper. Results Comparison of the perceived width ratio of lateral to central incisor and canine to lateral incisor with the golden proportion of 0.618 revealed there were a significant statistical difference (p  Conclusions The golden proportion was not found to exist between the perceived widths of maxillary anterior teeth. No golden standard were detected for the width-to-height proportions of maxillary incisors. Specific population characteristics and perception of beauty must be considered. However, ethnicity has no association with the proportions of maxillary anterior teeth.

  10. Evaluation of maxillary anterior teeth and their relation to the golden proportion in malaysian population

    Science.gov (United States)

    2013-01-01

    Background The maxillary anterior teeth are important in achieving pleasing dental aesthetics. Various methods are used to measure the size and form of them, including the golden proportion between their perceived widths, and the width-to-height ratio, referred to as the golden standard. The purpose of this study was conducted to evaluate whether consistent relationships exist between tooth width and height of the clinical crown dimensions; and to investigate the occurrence of the golden proportion of the maxillary anterior teeth. Methods Dental casts of the maxillary arches were made in this cross-sectional study from MAHSA University College students who met the inclusion criteria. The 49 participants represented the Malaysian population main ethnics. The dimensions of the anterior teeth and the perceived width of anterior teeth viewed from front were measured using a digital caliper. Results Comparison of the perceived width ratio of lateral to central incisor and canine to lateral incisor with the golden proportion of 0.618 revealed there were a significant statistical difference (p proportion and the golden standard. Conclusions The golden proportion was not found to exist between the perceived widths of maxillary anterior teeth. No golden standard were detected for the width-to-height proportions of maxillary incisors. Specific population characteristics and perception of beauty must be considered. However, ethnicity has no association with the proportions of maxillary anterior teeth. PMID:23347800

  11. TREATMENT APPROACHES FOR TRAUMATIZED ANTERIOR TEETH WITH EXCESSIVE TISSUE LOSS: THREE CASE REPORTS

    Directory of Open Access Journals (Sweden)

    Zuhal YILDIRIM

    2017-04-01

    Full Text Available Use of direct composite and indirect laminate veneers has been an alternative to metal- and all-ceramic crowns for anterior teeth restorations. Dental traumas are the most common reasons for excessive tissue loss. Treatment options depend on the amount of remaining tissue, the extent of the damage to dental pulp and periapical tissues and the time elapsed before dental treatment. The aim of this case report was to evaluate the direct and indirect techniques used in the treatments of traumatically fractured anterior teeth. In Case 1, a 29-year-old male patient attended to the clinics of the Department of Restorative Dentistry, Faculty of Dentistry, Istanbul University for the replacement of old composite restorations. According to anamnesis, the anterior teeth had fractured because of falling from bicycle. Dentinal pins used to retain the composite restorations were screwed out and indirect composite laminate veneers were placed. In Case 2, a 27-year-old male patient attended to our clinic for the treatment of his anterior teeth which were fractured due to a fall. A different type of technique, a silicon guide, was used to mimic the natural teeth surfaces precisely. In Case 3, a 16-year-old female patient attended to our clinic for the treatment of her anterior teeth which were fractured in a car accident. On clinical evaluation, related teeth were found to be non-vital and application of fiber posts was considered suitable before direct composite restorations. In conclusion, all of these techniques may be used for traumatized anterior teeth. Esthetical necessities and functional forces should be taken into consideration in material choice.

  12. Anthropometric analysis of anterior maxillary teeth with digital photography - a study in a Portuguese sample.

    Science.gov (United States)

    Calçada, Diogo; Correia, André; Araújo, Filipe

    2014-01-01

    Establishing a geometrical pattern of the anterior maxillary sector has been attempted for a long time. The Golden Proportion, Preston's Percentage, Golden Percentage, Recurring Esthetic Dental (RED) Proportion and, most recently, Gauge Proportion, are theories that try to apply mathematical and geometrical relations to the anterior maxillary teeth. To study the anterior maxillary teeth proportions of a Portuguese population sample and see if any of the existent anthropometric proportions can be applied to the oral rehabilitation of this population. Standardized frontal and lateral images of 50 dental patient smiles included in the inclusion criteria were captured. The widths and heights of maxillary anterior teeth were measured using image-processing software and data were statistically analyzed using a parametric test (t test). The widths and heights were concordant with the values described by the Gauge Proportion. However, they were above the recommended value of 78% for the width/height proportion advocated. The proportions between the widths of the maxillary anterior teeth were not constant as proposed by the Golden Proportion and the RED Proportion. The Preston Proportion was found to be in concordance with the studied population. The values observed were closer to the Golden Percentage. Considering genre, there was a statistically significant difference. Male patients had teeth with larger dimensions than females. Within the limitations of this study, mainly concerned to the sample size, it may be concluded that the widths and heights of the anterior maxillary teeth were coincident with the Gauge Proportion. Both the Golden Proportion and the RED proportion are unsuitable methods to relate the widths of the maxillary anterior teeth unlike the Preston's Proportion. The Golden Percentage was close to the percentages observed and could be adjusted to be taken in consideration to this population.

  13. Perawatan gigi impaksi anterior rahang atas pada remaja (The treatment of maxillary anterior impacted teeth in adolescent

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    Herdi Eko Pranjoto

    2005-09-01

    Full Text Available The incidence of impacted tooth in adolescent is usually found by oral surgeon or orthodontist during their sequence of treatments. The maxillary anterior teeth, especially canine and third lower molar are the most common impacted teeth found as the result of their eruption disturbances. The surgical technique principle is to facilitate the impacted tooth, so that it can be erupted by creating a window and take the bone obstructed surrounding the tooth crown surgically and afterward it is orthodontically tracted. In a case of third molar germ which is predicted to be impacted in mesio version position, germinectomy is preferred to prevent anterior mechanical drive during its development which may cause mal-alignment of the mandibular teeth. Germinectomy which is usually easier than odontectomy, the germ position, and less complication after the surgical intervention are three factors that should be considered in making decision.

  14. Esthetic rehabilitation of anterior discolored teeth with lithium disilicate all-ceramic restorations.

    Science.gov (United States)

    Prevedello, Gustavo Costa; Vieira, Marcelo; Furuse, Adilson Yoshio; Correr, Gisele Maria; Gonzaga, Carla Castiglia

    2012-01-01

    The esthetic treatment of darkened anterior teeth represents a great challenge to dentists, because dental materials ideally should match the natural teeth. The optical behavior of the final restoration is determined by the color of the underlying tooth structure, the color of the luting agent, and the thickness and opacity of the ceramic material used. This article reports a case in which veneers and full crowns made of heat-pressed, lithium disilicate glass-ceramic were used for the esthetic rehabilitation of anterior discolored teeth. The patient was referred for treatment with defective anterior composite resin restorations, provisional acrylic resin crowns, darkening of the gingival margins, and uneven gingival contours. The multidisciplinary treatment plan included dental bleaching, periodontal plastic surgery to create gingival symmetry, and indirect all-ceramic restorations using high-opacity lithium disilicate glass-ceramic ingots. The treatment was successful and an excellent esthetic result was achieved.

  15. Geometric and mathematical proportions and their relations to maxillary anterior teeth.

    Science.gov (United States)

    Ali Fayyad, Mohammed; Jamani, Kifah Dafi; Agrabawi, Jamal

    2006-11-01

    One of the critical aspects of esthetic dentistry is creating geometric or mathematical proportions to relate the successive widths of the anterior teeth. The golden proportion, the recurring esthetic dental (RED) proportion, and the golden percentage are theories introduced in this field. The aim of this study was to investigate the existence of the golden proportion, RED proportion, and the golden percentage between the widths of the maxillary anterior teeth in individuals with natural dentition. Standardized frontal images of 376 dental student smiles were captured. The images were transferred to a personal computer, the widths of the maxillary anterior teeth were measured, and calculations were made according to each of the above mentioned theories. The data were statistically analyzed using paired student T-test (level of significance Pproportion was found to be accurate between the width of the right central and lateral incisors in 31.3% of men and 27.1% of women. The values of the RED proportion were not constant, and the farther the one moves distally from the midline the higher the values. Furthermore, the results revealed the golden percentage was rather constant in terms of relative tooth width. The width of the central incisor represents 23%, the lateral incisor 15%, and the canine 12% of the width of the six maxillary anterior teeth as viewed from the front. Both the golden proportion and the RED proportion are unsuitable methods to relate the successive widths of the maxillary anterior teeth. However, the golden percentage theory seems to be applicable to relate the successive widths of the maxillary anterior teeth if percentages are adjusted taking into consideration the ethnicity of the population.

  16. A CASE OF LOWER ANTERIOR PRIMARY TEETH FUSION

    Directory of Open Access Journals (Sweden)

    Noni Nurseni

    2006-04-01

    Full Text Available Dental fusion is the most common problem seen in the primary dentition. The incidence of dental fusion was approximately 0.5% for deciduous dentition and 0.1% for permanent dentition. Fusion may be complete or incomplete. Its etiology was related to genetic or local factor. These anomalies could result in dental caries, esthetic problem, periodontal disease, dental malocclusion, and hypodontia in permanent dentition. Treatment of fused teeth depends on the location and extent of fusion. This report describes an incomplete dental fusion with dentinal caries occurred on 72 and 73 while 32 was agenesis. The purpose of the treatment was to improve the esthetic performance and subsequently to keep the teeth until the exfoliation time. After the restoration of 72 and 73, the patient feels satisfied.

  17. Soldered Power Arm: An Easy and Effective Method for Intrusion and Retraction of Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Ketan K Vakil

    2014-01-01

    Full Text Available The orthodontic correction of deep overbite can be achieved with several mechanisms that will result in true intrusion of anterior teeth, extrusion of posterior teeth, or a combination of both. For the orthodontic correction of bimaxillary dentoalveolar protrusion with deep bite, there are several treatment modalities like segmented arch approach, retraction and intrusion utility arches, temporary anchorage devices. Though not a novel therapeutic concept, the use of miniscrew implants to obtain absolute anchorage has recently become very popular in clinical orthodontic approaches. To allow the use of sliding mechanics for bodily retraction with intrusion of anterior teeth, we devised a soldered power arm (SPA on standard molar tube. It is simple, stable, precise and effective in cases where anterior teeth need to be simultaneously retracted and intruded. A power arm can be readily fabricated from 20 gauge stainless steel wire and soldered on the molar buccal tube so as to avoid any distortion or loosening of power arm from molar tube during the course of the treatment. The SPA works efficiently with the molar being stabilized in all three planes of space. The resultant force vector is directed more apically toward the center of resistance of the anchor unit, which resulted in the treatment outcome of retraction and intrusion of the anterior teeth and correction of the deep bite.

  18. Prevalence of third molar impaction in patient with mandibular anterior teeth crowding

    Directory of Open Access Journals (Sweden)

    Tan Chun Wei

    2016-11-01

    Full Text Available Introduction: Third molar impaction has been a controversial topic among clinician when it comes to mandibular anterior teeth crowding. The aim is to know the prevalence of third molar impaction in patient with mandibular anterior teeth crowding in Orthodontic Department, RSGM UNPAD, Indonesia. Methods: This was a descriptive research, with non-probability sampling obtained from a population with full arch 32 teeth. Totaling 54 samples from year 2011 to 2014 were obtained. The age of sample range from 15 to 25 years old. Also all panoramic radiographs taken from the year 2011 to 2014 were examined using a computer. The position of third molars were determined by Winter’s classification using angle formed between the intersected longitudinal axes of the second and third molars and anterior teeth status by using Little’s irregularities index. Results: This study obtained data that as much as 68.52% mesioangular third molar, 19.44% distoangular, 4.63% horizontal, 1.85% buccolingual and 0% others. In mesioangular impaction condition there was crowding 83.78%, in distoangular condition there was 100% crowding, in horizontal position crowding found 100%, while at buccolingual crowding found 100%.Conclusion: In all positions the third molar impaction was accompanied by crowding of the mandible anterior teeth, with the largest percentage of impaction was the mesioangular position

  19. A simplified technique for the restoration of severely mutilated primary anterior teeth.

    Science.gov (United States)

    Mortada, A; King, N M

    2004-01-01

    The restoration of severely carious primary anterior teeth is a challenge to the pediatric dentist. The introduction of new materials and technologies makes re-evaluation of existing treatment philosophies necessary. A technique involving the placement of an omega shaped stainless steel wire extension into the entrance of the root canal prior to restoring the crown with a compomer material is described. 96 restorations were placed in 25 children. After 18 months 81.2% of the 96 restorations, which were available for evaluation, 60 (79.9%) were intact. The technique for restoring primary anterior teeth was simple, quick and effective.

  20. Gingival contour and clinical crown length: their effect on the esthetic appearance of maxillary anterior teeth.

    Science.gov (United States)

    Kokich, V G; Nappen, D L; Shapiro, P A

    1984-08-01

    Fractured, congenitally missing, or avulsed maxillary incisors can often jeopardize the esthetic appearance of the remaining maxillary anterior teeth after orthodontic treatment. In many cases the unesthetic appearance is related to the irregular clinical crown lengths of either the fractured teeth or those that have been substituted for the missing teeth. The results of five cases with either fractured or traumatically avulsed central incisors are reported. Selective tooth intrusion and restorative techniques were used during the finishing stages of orthodontic treatment to improve the final esthetic result. The advantages and disadvantages of the intrusion technique are discussed.

  1. Esthetic Rehabilitation of Anterior Teeth with Laminates Composite Veneers

    OpenAIRE

    Dino Re; Gabriele Augusti; Massimo Amato; Giancarlo Riva; Davide Augusti

    2014-01-01

    No- or minimal-preparation veneers associated with enamel preservation offer predictable results in esthetic dentistry; indirect additive anterior composite restorations represent a quick, minimally invasive, inexpensive, and repairable option for a smile enhancement treatment plan. Current laboratory techniques associated with a strict clinical protocol satisfy patients’ restorative and esthetic needs. The case report presented describes minimal invasive treatment of four upper incisors with...

  2. The Correlation between Different Facial Measurements and the Width of Maxillary Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Hassan Ahangari A.

    2011-08-01

    Full Text Available Statement of Problem: One of the most important procedures in the rehabilitation of an edentulous space in the anterior segment is the selection of an appropriate size of the anterior teeth in order to achieve the perfect esthetic results.Purpose: The purpose of this study was to examine the correlation between horizontal measurements of the face and width of the maxillary anterior teeth.Material and methods: In this descriptive-analytical and cross-sectional study, the face and teeth of the 77 subjects (39 women and 38 men aged between 20-30 with no facial and dental deformities were examined. Some horizontal dimensions of the face including IC (intercanthal, IP (interpupillary, BZW (bizygomatic width, IA (interalar, and ICm (Intercomussural width and perceived width of the teeth were calculated with AutoCAD software with 0.1 mm accuracy on the photos. The actual width of the teeth was calculated with a digital caliper by 0.1 mm accuracy on the maxillary casts. The data were analyzed in SPSS software using the Pearson correlation coefficient and t-test.Results: Except for the IC and the sum of the actual width of the six maxillary anterior teeth on the cast, the rest of the measurements were significantly different by gender ( p < 0.05. All the correlations between facial measurements and width of the teeth were bigger than when they were separated by gender. In women, the correlation between IC and the six anterior teeth in the front view (SANTF was the highest one ( r = 0.436, p = 0.005. However, the highest correlation was related to the ICm and SANTF in men. (r = 0.0501, p =0.001Conclusion: Within the limitation of this study, the results suggest that except for the BZW, the rest of the facial measurements including IC, IP, IA and ICm can be used as a preliminary criterion for determining the width of the maxillary anterior teeth of the edentulous patients.

  3. Comparative evaluation of slot versus dovetail design in class III composite restorations in primary anterior teeth.

    Science.gov (United States)

    Rathnam, Arun; Nidhi, Madan; Shigli, Anand L; Indushekar, K R

    2010-01-01

    The esthetic restorations of primary anterior teeth have always occupied an important part of the pediatric dentist's armamentarium. Various materials have been tried for this purpose and ample materials have been researched in an attempt to fulfill the prerequisites for an ideal esthetic restorative material.Composite resins have been traditionally noted to have decreased bonding ability to primary teeth and the use of secondary retentive features has been advocated to increase bonding. Fifty pairs of anterior class III carious teeth were selected having mirror image lesions on their contralateral proximal surfaces. These teeth were prepared with either a slot or a modified dovetail type of cavity preparation. The patients were then kept on recall to check the clinical characteristics of the restorations at 3, 6, and 12 months. The criteria for evaluation included marginal adaptation, anatomic form, surface discoloration and secondary caries. It was concluded from the results that the both slot and dovetail types of cavity preparations were equally effacious when clinically reviewed for a period of 12 months. Hence the use of slot type of cavity preparation with reduced loss of the tooth structure is indicated for class III cavities in primary anterior teeth.

  4. An unusual presentation of all the mandibular anterior teeth with two root canals - A case report

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    Tiku A

    2005-01-01

    Full Text Available A rare case of two root canals in all mandibular anterior teeth is presented. The patient initially reported for the treatment of mandibular right central and lateral incisors. However, radiographic evaluation revealed variant root canal and apical foramen patterns.

  5. Comparative evaluation of slot versus dovetail design in class III composite restorations in primary anterior teeth

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    Arun Rathnam

    2010-01-01

    It was concluded from the results that the both slot and dovetail types of cavity preparations were equally effacious when clinically reviewed for a period of 12 months. Hence the use of slot type of cavity preparation with reduced loss of the tooth structure is indicated for class III cavities in primary anterior teeth.

  6. Relationship between width and length ratios of upper anterior teeth in young Chilean population.

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    Jorge Troncoso-Pazos

    2017-08-01

    Full Text Available Introduction: Knowledge about the size and proportion of upper anterior teeth allows dental rehabilitation taking into consideration the local parameters of a population. The aim of this research is to determine the width, length and the relationship between width and length of central incisor, lateral incisor and canine teeth in both sexes in young Chilean population. Methodology: A cross-sectional study was performed. Study subjects included 187 dentistry students from two Chilean cities (mean age 21.35±2.7 years, 52.9% men. The teeth width and height were measured and the width/height ratio was calculated. Differences in measurements according to sex was analyzed (p<0.05; STATA v.10.0. Results: The width and height of the teeth were statistically and proportionally larger in men (p<0.05. The width/height ratio of lateral and canine incisors was significantly higher in women (p<0.05. Conclusion: In a sample of young Chileans, upper anterior teeth were longer and wider in men. However, the width/height ratio of teeth was found to be significantly higher in women.

  7. An indirect veneer technique for simple and esthetic treatment of anterior hypoplastic teeth

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    Amit Khatri

    2010-01-01

    Full Text Available This study describes a technique for treating anterior hypoplastic teeth using indirect nanocomposite veneer restoration. The prime advantage of an indirect veneer technique is that it provides an esthetic and conservative result. One of the most frequent reasons that patients seek dental care is discolored anterior teeth. Although treatment options such as removal of surface stains, bleaching, microabrasion or macroabrasion, veneering, and placement of porcelain crowns are available, conservative approach such as veneer preserves the natural tooth as much as possible. Full veneers are recommended for the restoration of localized defects or areas of intrinsic discoloration, which are caused by deeper internal stains or enamel defects. Indirectly fabricated veneers are much less sensitive compared to a operator′s technique and if multiple teeth are to be veneered, indirect veneers can be usually placed much more expeditiously. Indirect veneers last much longer than the direct veneers. Therefore, indirectly fabricated veneers are more advantageous than directly fabricated veneers in many cases.

  8. Recurrent unicystic ameloblastoma in mandibular anterior teeth area

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    Lee, Won Do; Lee, Wan; Kim, Jin Hoa; Choi, Dong Hoon; Paeng, Jun Young; Kim, Eun Cheol [Department of Oral and Maxillofacial Radiology, School of Dentistry, Wonkwang University, Wonkwang Dental Research Institute, Iksan (Korea, Republic of)

    2008-06-15

    The unicystic ameloblastoma (UA) is a variant of the solid or multicystic ameloblastoma, a less encountered variant of the ameloblastoma. It appears more frequently in the second or third decade with no sexual or racial predilection. It is almost exclusively encountered asymptomatically in the posterior mandible. We report a case of a 43-year old patient with UA, who had previously undergone a surgical treatment on the same site about 1 year ago, this lesion recurred and presented as an exophytic gingival lesion in the anterior mandibular region.

  9. The cardiac malpositions.

    Science.gov (United States)

    Perloff, Joseph K

    2011-11-01

    Dextrocardia was known in the 17th century and was 1 of the first congenital malformations of the heart to be recognized. Fifty years elapsed before Matthew Baillie published his account of complete transposition in a human of the thoracic and abdominal viscera to the opposite side from what is natural. In 1858, Thomas Peacock stated that "the heart may be congenitally misplaced in various ways, occupying either an unusual position within the thorax, or being situated external to that cavity." In 1915, Maude Abbott described ectopia cordis, and Richard Paltauf's remarkable illustrations distinguished the various types of dextrocardia. In 1928, the first useful classification of the cardiac malpositions was proposed, and in 1966, Elliott et al's radiologic classification set the stage for clinical recognition. The first section of this review deals with the 3 basic cardiac malpositions in the presence of bilateral asymmetry. The second section deals with cardiac malpositions in the presence of bilateral left-sidedness or right-sidedness. Previous publications on cardiac malpositions are replete with an arcane vocabulary that confounds rather than clarifies. Even if the terms themselves are understood, inherent complexity weighs against clarity. This review was designed as a guided tour of an unfamiliar subject.

  10. Aesthetic treatment on anterior teeth crown fracture caused by dental trauma

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    Nanik Zubaidah

    2012-12-01

    Full Text Available Background: Complicated crown fracture is a tooth fracture that involve enamel, dentine and pulp. The incidence of complicated crown fracture ranges from 2% to 13% of all dental injuries and the most commonly involved teeth are the maxillary central incisors. Various treatment modalities are available depending on the clinical, physiological and radiographic examination of the involved teeth. Purpose: The aim of this case report is to present the management of crown fractures with pulpal exposure caused by traumatic injury, through endorestoration approach to reconstruct the shape and function of the teeth. Case: A 17 years old male with complicated crown fractures of anterior teeth #11 #21 and #22. The patient wish for aesthetic dental treatment in both of its form and function. Case management: Crown fractures of anterior teeth with exposed pulp caused by traumatic injury were reconstructed by endorestoration approach. The endodontic treatment with post and core insertion in the root canal which will increase its retention and porcelain fused to metal crown which will aesthetically recover its original form and function. After restoration the patient feel very glad and confident with the result. Conclusion: Endorestoration treatment on anterior teeth with complicated crown fractures and exposed pulp is able to recover the normal form, function and dental aesthetic in accordance with stomatognatic system and self confidence.Latar belakang: Fraktur mahkota kompleks (complicated adalah fraktur pada mahkota gigi yang melibatkan enamel, dentin dan pulpa. Kejadian dari fraktur mahkota kompleks bervariasi antara 2-13% dari semua trauma gigi dan sebagian besar gigi yang terkena adalah gigi insisif pertama rahang atas. Berbagai macam cara perawatan yang dilakukan tergantung pada hasil pemeriksaan klinis, psikologis dan radiografis dari gigi yang terkena. Tujuan: Laporan kasus ini menjelaskan penatalaksanaan fraktur mahkota gigi dengan pulpa terbuka

  11. Regression methods to investigate the relationship between facial measurements and widths of the maxillary anterior teeth.

    Science.gov (United States)

    Isa, Zakiah Mohd; Tawfiq, Omar Farouq; Noor, Norliza Mohd; Shamsudheen, Mohd Iqbal; Rijal, Omar Mohd

    2010-03-01

    In rehabilitating edentulous patients, selecting appropriately sized teeth in the absence of preextraction records is problematic. The purpose of this study was to investigate the relationships between some facial dimensions and widths of the maxillary anterior teeth to potentially provide a guide for tooth selection. Sixty full dentate Malaysian adults (18-36 years) representing 2 ethnic groups (Malay and Chinese), with well aligned maxillary anterior teeth and minimal attrition, participated in this study. Standardized digital images of the face, viewed frontally, were recorded. Using image analyzing software, the images were used to determine the interpupillary distance (IPD), inner canthal distance (ICD), and interalar width (IA). Widths of the 6 maxillary anterior teeth were measured directly from casts of the subjects using digital calipers. Regression analyses were conducted to measure the strength of the associations between the variables (alpha=.10). The means (standard deviations) of IPD, IA, and ICD of the subjects were 62.28 (2.47), 39.36 (3.12), and 34.36 (2.15) mm, respectively. The mesiodistal diameters of the maxillary central incisors, lateral incisors, and canines were 8.54 (0.50), 7.09 (0.48), and 7.94 (0.40) mm, respectively. The width of the central incisors was highly correlated to the IPD (r=0.99), while the widths of the lateral incisors and canines were highly correlated to a combination of IPD and IA (r=0.99 and 0.94, respectively). Using regression methods, the widths of the anterior teeth within the population tested may be predicted by a combination of the facial dimensions studied. (c) 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.

  12. Clinical comparison of various esthetic restorative options for coronal build-up of primary anterior teeth

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    Himanshu Duhan

    2015-01-01

    Full Text Available Background: This study was designed to compare the clinical performance of composite, strip crowns, biological restoration, and composite with stainless steel band when used for the coronal build-up of anterior teeth. Materials and Methods: A total of 20 patients aged 3-6 years presenting with mutilated primary anterior teeth due to caries or trauma were selected for the study using randomized simple sampling. A total of 52 primary anterior teeth were randomly divided into four equal groups having 13 teeth in each group. Teeth in Group I were restored with composite, in Group II with strip crowns, in Group III with biologic restoration and with stainless steel band reinforced composite in group IV. The restorations were evaluated for color match, retention, surface texture, and anatomic form according to Ryge′s Direct (US Public Health Service evaluation criteria at baseline (immediate postoperative, after 48 h, 3, 6, and 9 months. The data obtained were statistically analyzed using Chi-square test, and level of significance, that is, P value was determined. Results: At baseline, none of the groups showed any color changes. Other than Group III all other groups showed highly significant changes (P 0.05. Deterioration in surface texture was exhibited maximum by restorations in Group IV followed by Group I at 3 months. Whereas, no surface changes were seen in Group II and III. Only Group I and IV showed discontinuity in anatomic form after 3 months. After 6 months, except in Group II, discontinuity in anatomic form was observed in all the groups. Discontinuity in anatomic form was seen in all the 4 groups after 9 months although the difference was not significant (P > 0.05. Conclusion: Biological restoration was found to be most satisfying esthetically owing to color compatibility with the patient′s tooth. Thus, it has a great potential to be used as esthetic restorative option in primary anteriors.

  13. Clinical comparison of various esthetic restorative options for coronal build-up of primary anterior teeth

    Science.gov (United States)

    Duhan, Himanshu; Pandit, Inder Kumar; Srivastava, Nikhil; Gugnani, Neeraj; Gupta, Monika; Kochhar, Gulsheen Kaur

    2015-01-01

    Background: This study was designed to compare the clinical performance of composite, strip crowns, biological restoration, and composite with stainless steel band when used for the coronal build-up of anterior teeth. Materials and Methods: A total of 20 patients aged 3-6 years presenting with mutilated primary anterior teeth due to caries or trauma were selected for the study using randomized simple sampling. A total of 52 primary anterior teeth were randomly divided into four equal groups having 13 teeth in each group. Teeth in Group I were restored with composite, in Group II with strip crowns, in Group III with biologic restoration and with stainless steel band reinforced composite in group IV. The restorations were evaluated for color match, retention, surface texture, and anatomic form according to Ryge's Direct (US Public Health Service) evaluation criteria at baseline (immediate postoperative), after 48 h, 3, 6, and 9 months. The data obtained were statistically analyzed using Chi-square test, and level of significance, that is, P value was determined. Results: At baseline, none of the groups showed any color changes. Other than Group III all other groups showed highly significant changes (P 0.05). Deterioration in surface texture was exhibited maximum by restorations in Group IV followed by Group I at 3 months. Whereas, no surface changes were seen in Group II and III. Only Group I and IV showed discontinuity in anatomic form after 3 months. After 6 months, except in Group II, discontinuity in anatomic form was observed in all the groups. Discontinuity in anatomic form was seen in all the 4 groups after 9 months although the difference was not significant (P > 0.05). Conclusion: Biological restoration was found to be most satisfying esthetically owing to color compatibility with the patient's tooth. Thus, it has a great potential to be used as esthetic restorative option in primary anteriors. PMID:26759595

  14. Clinical comparison of various esthetic restorative options for coronal build-up of primary anterior teeth.

    Science.gov (United States)

    Duhan, Himanshu; Pandit, Inder Kumar; Srivastava, Nikhil; Gugnani, Neeraj; Gupta, Monika; Kochhar, Gulsheen Kaur

    2015-01-01

    This study was designed to compare the clinical performance of composite, strip crowns, biological restoration, and composite with stainless steel band when used for the coronal build-up of anterior teeth. A total of 20 patients aged 3-6 years presenting with mutilated primary anterior teeth due to caries or trauma were selected for the study using randomized simple sampling. A total of 52 primary anterior teeth were randomly divided into four equal groups having 13 teeth in each group. Teeth in Group I were restored with composite, in Group II with strip crowns, in Group III with biologic restoration and with stainless steel band reinforced composite in group IV. The restorations were evaluated for color match, retention, surface texture, and anatomic form according to Ryge's Direct (US Public Health Service) evaluation criteria at baseline (immediate postoperative), after 48 h, 3, 6, and 9 months. The data obtained were statistically analyzed using Chi-square test, and level of significance, that is, P value was determined. At baseline, none of the groups showed any color changes. Other than Group III all other groups showed highly significant changes (P 0.05). Deterioration in surface texture was exhibited maximum by restorations in Group IV followed by Group I at 3 months. Whereas, no surface changes were seen in Group II and III. Only Group I and IV showed discontinuity in anatomic form after 3 months. After 6 months, except in Group II, discontinuity in anatomic form was observed in all the groups. Discontinuity in anatomic form was seen in all the 4 groups after 9 months although the difference was not significant (P > 0.05). Biological restoration was found to be most satisfying esthetically owing to color compatibility with the patient's tooth. Thus, it has a great potential to be used as esthetic restorative option in primary anteriors.

  15. Correlation between some facial indexes and mesiodistal width of maxillary anterior teeth

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    Leila Ahmadian

    2012-01-01

    Full Text Available Background: Both tooth size and shape of the anterior maxilla play important role in complete denture and facial esthetics. Tooth selection for an edentulous patient with no pre-extraction is very difficult. The purpose of this study was to analyze mesio-distal width of maxillary anterior teeth and to determine the presence of any relationship between them and other facial measurements.Materials and Method: In this cross-sectional study, after enrolment of 100 high school students, full-face standardized digital images of them were taken in frontal view. Bizaygomatic, interpupilary and interalar distance were measured by images. Width of teeth was determined on the casts. T-test and pearson correlation coefficient were performed to analyze the data.Results: Maxillary central incisor is the widest anterior tooth in both male and female. Correlation between bizaygomatic and interpupillay distances and central incisor width were not significant but between interalar and intercanine were significant.Conclusion: Based on this study, interalar distance is a better index to estimate the width of anterior teeth of maxilla in an edentulous patient

  16. The Protocol of Fixed Reconstruction for Severely Worn Teeth Combined with Anterior Deep Bite

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    Ya-Wen Zhao

    2017-01-01

    Full Text Available Full mouth reconstruction is one of the most effective methods to restore severe worn teeth that have suffered reduced vertical dimension. Although the use of the overlay splint restoration for a trial period allowing the patient to adapt to an increased vertical dimension is the recognized method, the specific protocol from the transitional splint to the fixed reconstruction is yet to be established. This case report describes a 50-year-old female patient who has severely worn teeth combined with an anterior deep bite and chewing pain. The protocol of the treatment process is described.

  17. Esthetic and functional rehabilitation of crowded mandibular anterior teeth using ceramic veneers: a case report.

    Science.gov (United States)

    de Andrade, Oswaldo Scopin; Ferreira, Luiz Alves; Hirata, Ronaldo; Rodrigues, Flavia Pires; D'Alpino, Paulo Henrique Perlatti; Di Hipolito, Vinicius

    2012-09-01

    The use of ceramic veneers to restore crowded teeth in the maxilla has been widely discussed in the literature. However, the use of this technique in the mandible has received little attention. Therefore, this case report describes the treatment of crowded mandibular anterior teeth using ceramic veneers. The primary treatment challenge in this region is the reduced tooth structure available for rehabilitation. Proper communication between the clinician and dental technician is required to achieve clinical success. This article presents a straightforward treatment plan and restorative technique that includes both the clinical and laboratory sequences necessary for predictable and stable postoperative outcomes.

  18. Non-masticatory uses of anterior teeth of Sima de los Huesos individuals (Sierra de Atapuerca, Spain).

    Science.gov (United States)

    Lozano, Marina; Bermúdez de Castro, José M; Carbonell, Eudald; Arsuaga, Juan Luis

    2008-10-01

    In this study we examine the labial and occlusal surfaces of incisors and canines of hominins recovered from the Sima de los Huesos (SH), middle Pleistocene site, in order to establish the possible extra-masticatory use of anterior teeth. We have compared the microwear of these fossils with microwear from the anterior teeth of Australian Aborigines, a population characterized by ethnographic evidence of the use of their teeth as a third hand. These two samples of teeth were microscopically analyzed using Scanning Electron Microscopy (SEM). Our results support the "cultural" origin of microwear observed on fossil teeth: we conclude that the SH hominins used their anterior teeth as a "third hand" for para- or extra-masticatory activities.

  19. The Shear Bond Strength of Porcelain Laminate to Prepared and Unprepared Anterior Teeth

    OpenAIRE

    Ali Asghar Alavi; Zeinab Behroozi; Farid Nik Eghbal

    2017-01-01

    Statement of the Problem: Porcelain laminate veneer is an esthetic restoration used as an alternative to full veneer crowns and requires minimal tooth preparation. In restoration with porcelain laminate veneers, both the longevity of the laminate and conservation of the sound tooth structure are imperative. Purpose: The present study aimed to investigate the shear bond strength of porcelain laminates to prepared- and unprepared- anterior teeth in order to compare their longevity and succes...

  20. Forced orthodontic extrusion for anterior traumatized teeth by a simplistic approach

    OpenAIRE

    Sameer Sidhagouda Patil; Ajay Sidharth Panicker; Ajit Hindlekar; S R Srinidhi; Ajinkya Dhumal; Ketan Vhora

    2014-01-01

    The management of patients with traumatic injuries to their dentition is an integral part of the general dental practice. Anterior teeth with fractures that extend subgingivally require a complex treatment plan that addresses biologic, esthetic, and functional factors, such as mastication and speech. Treatment of crown fractures often requires a multi-disciplinary approach. However, crown-root fractures with fracture line below the gingival attachment or alveolar bone crest present restorativ...

  1. Validity of mathematical proportions in maxillary anterior teeth among Bangladeshi population

    OpenAIRE

    Monwarul Aziz; Md. Zakir Hossain

    2017-01-01

    Objective: To investigate the existence and suitability of mathematical proportions between the widths of maxillary anterior teeth in Bangladeshi population having an esthetic smile, with the aid of digital photographs and computer analysis. Place of Study: The study was conducted at the Department of Orthodontics and Dentofacial Orthopedics of Dhaka Dental College and Hospital, Dhaka. Period of Study: The study was conducted from April 2016 to September 2016. Sample Selection: The study samp...

  2. Esthetic crown lengthening for maxillary anterior teeth: an interdisciplinary case report

    OpenAIRE

    Çelik, Ersan; ÖZDEN, Nehir; ÖZAK, Şule Tuğba

    2014-01-01

    Dentists are called on to provide restorations that are harmony with the lips, the face, the adjacent teeth, and a healthy periodontium. Periodontal theraphy plays an important role in the esthetic rehabilitation of the maxillary anterior segment, especially if the periodontal disease is present. This case report describes an interdisciplinary approach to the management of upper central incisors and application of Turkom-Cera all-ceramic fixed partial denture.Turkom-Cera all-ceramic fixed par...

  3. [Three-dimensional finite element analysis of maxillary anterior teeth retraction force system in light wire technique].

    Science.gov (United States)

    Zhang, Xiangfeng; Wang, Chao; Xia, Xi; Deng, Feng; Zhang, Yi

    2015-06-01

    This study aims to construct a three-dimensional finite element model of a maxillary anterior teeth retraction force system in light wire technique and to investigate the difference of hydrostatic pressure and initial displacement of upper anterior teeth under different torque values of tip back bend. A geometric three-dimensional model of the maxillary bone, including all the upper teeth, was achieved via CT scan. To construct the force model system, lingual brackets and wire were constructed by using the Solidworks. Brackets software, and wire were assembled to the teeth. ANASYS was used to calculate the hydrostatic pressure and the initial displacement of maxillary anterior teeth under different tip-back bend moments of 15, 30, 45, 60, and 75 Nmm when the class II elastic force was 0.556 N. Hydrostatic pressure was concentrated in the root apices and cervical margin of upper anterior teeth. Distal tipping and relative intrusive displacement were observed. The hydrostatic pressure and initial displacement of upper canine were greater than in the central and lateral incisors. This hydrostatic pressure and initial intrusive displacement increased with an increase in tip-back bend moment. Lingual retraction force system of maxillary anterior teeth in light wire technique can be applied safely and controllably. The type and quantity of teeth movement can be controlled by the alteration of tip-back bend moment.

  4. Accuracy of an Electronic Apex Locator for Working Length Determination in Primary Anterior Teeth

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    Zahra Bahrololoomi

    2015-10-01

    Full Text Available Objectives: Correct determination of working length is an important step for suc- cess of endodontic therapy. Conventional radiography has limitations in providing the accurate location of apical foramen. For this reason, electronic apex locators (EALs were developed to shorten the treatment time and decrease the radiation dose. The aim of this study was to evaluate the accuracy of Root ZX EAL for work- ing length determination in primary anterior teeth.Materials and Methods: In this in-vitro study, 50 extracted primary anterior teeth with root resorption were selected with no obstructed canals or history of previous root canal therapy. Working lengths were measured by direct observation of actual length (AL, radiography and Root ZX EAL. A variation of ±0.5 mm from the AL was considered acceptable. The results were analyzed statistically using paired t test and interclass correlation coefficient (ICC at 0.05 level of significance.Results: Considering an acceptable 0.5 mm margin from AL (direct measurement, the accuracy of Root ZX EAL and radiography was found to be 86% and 76%, respectively. Absolute value of error from AL was significantly lower for ZX com- pared to radiography (P˂0.001. Interclass correlation comparing both radiography and Root ZX with AL showed strong correlations.Conclusion: Root ZX EAL can be used as a reliable tool for obtaining root canal length in primary anterior teeth with resorption.

  5. Esthetic smile rehabilitation of anterior teeth by treatment with biomimetic restorative materials: a case report

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    Gouveia TH

    2017-05-01

    Full Text Available Thayla Hellen Nunes Gouveia, Jéssica Dias Theobaldo, Waldemir Francisco Vieira-Junior, Débora Alves Nunes Leite Lima, Flávio Henrique Baggio Aguiar Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Campinas, SP, Brazil Background: In daily clinical practice, esthetics of anterior teeth is a common presenting complaint of patients.Objective: This case report discusses the management of asymmetric smile associated with unsatisfactory extensive composite restorations and describes a clinical protocol using the direct composite resin for smile enhancement to restore the dental harmony of anterior teeth.Methods: The treatment planning was based on a diagnostic wax-up and cosmetic mock-up. After clinical and patient approvals were obtained, the patient was subjected to direct and indirect restorative treatment.Conclusion: Nanocomposites are an effective alternative for anterior teeth restorations. Additionally, good planning enables satisfactory esthetic results, leading to the correction of an inappropriate axial inclination of incisors. Keywords: composite, adhesive, smile, esthetic, restoration

  6. Evaluation of changes in clinical crown length of lower anterior teeth after treatment with Frankel-2′s appliance

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    Arthur C Vasconcelos

    2014-01-01

    Conclusion: It can be concluded that there is a tendency to increase the clinical crown of lower anterior teeth throughout the years after the mandibular advancement treatment by using functional devices, rejecting the null hypotheisis.

  7. Polyethylene fiber-reinforced composite resin used as a short post in severely decayed primary anterior teeth: a case report.

    Science.gov (United States)

    Bayrak, Sule; Tunc, Emine Sen; Tuloglu, Nuray

    2009-05-01

    The case report presented here is of a 4-year-old girl with severely decayed maxillary anterior teeth. After root canal treatment, the primary maxillary central and lateral incisors were reinforced using polyethylene fiber-reinforced composite resin short posts and restored using celluloid strip crowns. The technique described here offers a simple and effective method for restoring severely decayed primary anterior teeth that reestablishes function, shape, and esthetics.

  8. A New System for Choosing the Form and Size of Complete Denture Anterior Teeth

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    Dario Melilli

    2016-01-01

    Full Text Available Introduction: In the absence of pre-extraction records, the choice of the size an form of anterior complete denture teeth can be extremely subjective. Several clinical and statistical parameters are usually used for choosing the correct size and form of the complete denture anterior teeth. Clinical Innovation: The technique consists of a system that allows the dentist to choose and, if necessary, easily change the dental mold during maxillomandibular recording session. The unique feature of the system is that six teeth of each mold are represented by veneers, which are connected to each other on the lingual surface by a fiber that allows each veneer some degree of movement. Discussion: This technique allows the three-dimensional verification of the patient’s esthetics and realistic phonetic test during the session of maxillomandibular records; if necessary, the dentist may easily replace the mold with a different one in form or size, without working the wax to move or replace a tooth.

  9. Clinical Performance of Pedo Jacket Crowns in Maxillary Anterior Primary Teeth.

    Science.gov (United States)

    Castro, Aimee; Badr, Sherine B Y; El-Badrawy, Wafa; Kulkarni, Gajanan

    2016-09-15

    To assess the clinical performance of Pedo Jacket crowns for restoration of carious primary anterior teeth. A total of 129 carious primary incisors and canines of 48 children younger than 71 months of age- were restored with Pedo Jacket crowns and resin-modified glass ionomer cementation. They were assessed for: ease of use; presence of recurrent decay; wear; partial or complete loss of the crown; color stability; gingival health; and overall clinical success over a 12-month follow-up. The patient's behavior at the restorative appointment during crown placement was also assessed. An overall clinical success of 89.5 percent of the teeth in 87.3 percent of the children was seen one year later. The crowns were easy to use, even in uncooperative children. The color stability, wear, plaque accumulation, and gingival health were acceptable. Discoloration, wear, or complete loss of the crown were found in 13.1 percent, 5.4 percent, and 7.6 percent of children, respectively. Although not statistically significant, failures were associated with poor patient cooperation at the time of crown placement, poor oral hygiene, or operator error. Pedo Jacket crowns are a viable treatment alternative for carious maxillary primary anterior teeth.

  10. Direct restoration of worn maxillary anterior teeth with a combination of composite resin materials: a case report.

    Science.gov (United States)

    Soares, Carlos José; Pizi, Eliane Cristina Gava; Fonseca, Rodrigo Borges; Martins, Luis Roberto Marcondes; Neto, Alfredo Júlio Fernandes

    2005-01-01

    Tooth loss, alterations on tooth structure, and reduced vertical dimension are known to severely compromise the stomatognathic system. This case report describes the treatment of a patient who presented with an extremely worn maxillary anterior dentition with a loss of posterior support owing to the loss of almost all the posterior teeth, except the mandibular premolars. Provisional removable partial dentures were used to create an optimum maxillomandibular relationship and to provide restorative space prior to the restoration of the remaining teeth. This restoration was accomplished with a combination of layered hybrid and microfilled composite materials, which restored the maxillary anterior teeth to optimum esthetics and function.

  11. Teething

    Science.gov (United States)

    ... because this can lead to infection. Avoid teething powders. NEVER give your child aspirin or place it against the gums or teeth. DO NOT rub alcohol on your baby's gums. DO NOT use homeopathic remedies, as they ...

  12. Immediate overdenture for improving aesthetic of anterior teeth with periodontal problem

    Directory of Open Access Journals (Sweden)

    FX. Ady Soesetijo

    2012-03-01

    Full Text Available Background: The construction of overdenture is often applied because endodontic treatment usualy give very promising results and patient has high motivation to maintain their natural teeth. Overdenture is a removable partial or complete denture that covers and rests on one or more remaining natural teeth, roots and/or dental implants. The presence of retained teeth can maximize retention, stabilization and prevent trauma to the oral mucosa. Meanwhile, the presence of root in the bone can delay resorption of the alveolar process. The role of proprioceptor in the periodontal ligament abutment teeth remains effective. Thus, it can be said the overdenture treatment is a preventive prosthodontic treatment. Purpose: The purpose of this case report was to present a case of maxillary and mandibullary anterior teeth with periodontal disease, through endodontic and prosthodontic treatments for recovering its function of phonetic and aesthetic. Case: The 25 years old female with periodontal problems (protrusive, wiggly °1–°2 and along with gingival retraction on 12, 11, 21, 22 and 32, 31, 41, 42. The patient felt bad about his performance and affect his self confidence. The patient visited tthe dental hospital to restore her teeth and recovering aesthetic and phonetic functions. Case management: The overdenture inserted immediately after one visit endodontic treatment and cutting off the clinical crown of the teeth. The adaptation of the denture is needed by relining using self cured acrylic resin. The patient was quite satisfied with the treatment. Conclusion: In conclusion, the maxillary and mandibullary anterior teeth with periodontal problem could be managed through conservative and prosthotontic approach of treatment to recover of its performance and function.Latar belakang: Konstruksi overdenture sering diaplikasikan pada pasien, karena perawatan endodontik memberikan hasil perawatan yang sangat menjanjikan dan pasien memiliki motivasi tinggi

  13. Characteristics of the gubernaculum tracts in mesiodens and maxillary anterior teeth with delayed eruption on MDCT and CBCT.

    Science.gov (United States)

    Oda, Masafumi; Nishida, Ikuko; Miyamoto, Ikuya; Habu, Manabu; Yoshiga, Daigo; Kodama, Masaaki; Osawa, Kenji; Tanaka, Tatsurou; Kito, Shinji; Matsumoto-Takeda, Shinobu; Wakasugi-Sato, Nao; Nishimura, Shun; Tominaga, Kazuhiro; Yoshioka, Izumi; Maki, Kenshi; Morimoto, Yasuhiro

    2016-10-01

    To elucidate the characteristics of the gubernaculum tracts (GTs) in maxillary anterior teeth with normal or delayed eruption and in mesiodens by using multidetector computed tomography and cone beam computed tomography. The characteristics of GTs in maxillary anterior teeth of 205 patients with impacted mesiodens were retrospectively analyzed by using multidetector computed tomography and cone beam computed tomography. The GTs of teeth with normal or delayed eruption and the GTs of mesiodens were examined. The detection ratio of GTs in impacted mesiodens and anterior teeth with delayed eruption was significantly lower than in teeth with normal eruption. A significant difference in the angulation was found between normal and delayed eruptions. Almost all detectable GTs in the inverted mesiodens were derived from the incisive canal, while the remaining were from the alveolar crest. The connecting area of major GTs to tooth in inverted mesiodens was the cervical or root area, but in all other anterior teeth, it was the crown area. GTs of inverted mesiodens may exhibit characteristics that are different from those of normal GTs when the teeth and/or the palate are developing. Copyright © 2016 Elsevier Inc. All rights reserved.

  14. An Analysis of Maxillary Anterior Teeth Dimensions for the Existence of Golden Proportion: Clinical Study.

    Science.gov (United States)

    Sandeep, Nalla; Satwalekar, Parth; Srinivas, Siva; Reddy, Chandra Sekhar; Reddy, G Ramaswamy; Reddy, B Anantha

    2015-09-01

    Appearance of the face is a great concern to everyone, as it is a significant part of self-image. The study analyzed the clinical crown dimensions of the maxillary anterior teeth with respect to their apparent mesiodistal widths, width-to-height ratio to determine whether golden proportion existed among the South Indian population. A total of 240 dentulous subjects were chosen for the study (120 males and 120 females) age ranging between 18 and 28 years. Full face and anterior teeth images of the subjects were made on specially designed device resembling a face-bow, mounted onto the wall under a standard light source. The width and height of the maxillary central incisors were measured on the stone casts using a digital caliper. The mean perceived maxillary lateral incisor to central incisor width ratio was 0.67 in males and 0.703 in females. The mean perceived maxillary canine to lateral incisor width ratio was 0.744 in males and 0.714 in females. The mean width-to-height ratio of the maxillary central incisor was 79.49% in males and 79.197% in females. The golden proportion was not found between perceived mesiodistal widths of maxillary central and lateral incisors and nor between perceived mesiodistal widths of maxillary lateral incisors and canines. In the majority of subjects, the width-to-height ratio of maxillary central incisor was within 75-80%. There are no statistically significant differences in maxillary anterior teeth proportions between males and females. The results may serve as guidelines for treatment planning in restorative dentistry and periodontal surgery.

  15. Validity of mathematical proportions in maxillary anterior teeth among Bangladeshi population

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    Monwarul Aziz

    2017-01-01

    Full Text Available Objective: To investigate the existence and suitability of mathematical proportions between the widths of maxillary anterior teeth in Bangladeshi population having an esthetic smile, with the aid of digital photographs and computer analysis. Place of Study: The study was conducted at the Department of Orthodontics and Dentofacial Orthopedics of Dhaka Dental College and Hospital, Dhaka. Period of Study: The study was conducted from April 2016 to September 2016. Sample Selection: The study samples collected from Students of Dhaka Dental College, Mirpur-14, Dhaka, Bangladesh, with age limit 18–35 years. Materials and Methods: Standardized frontal images of 100 dental students of Dhaka Dental College were captured. All the images were downloaded to a personal computer, and width of each tooth was measured by the scale tool of Photoshop CS version 8.0. All the data were analyzed (through standard statistical method using Statistical Package for Social Science Software version 20 (IBM Corp., USA. Results: The golden proportion existed in 17% of the perceived width ratios of lateral incisor to central incisor and 4% of the width ratios of canine to lateral incisor in natural dentition. Sixty-six percent lateral incisors are following the golden percentage, but only 7% central incisors and 21% canines are following the golden percentage. The recurring esthetic dental (RED proportion existed in only 4% of participants. Conclusions: The golden proportion, golden percentage, and the RED proportion cannot be used as constant proportions to create a harmonious proportion throughout the width of maxillary anterior teeth. The adjusted golden percentage might serve as a guideline to create harmonious proportions in maxillary anterior teeth for Bangladeshi population.

  16. Three-dimensional analysis using finite element method of anterior teeth inclination and center of resistance location.

    Science.gov (United States)

    Geramy, Allahyar; Sodagar, Ahmad; Hassanpour, Mehdi

    2014-01-01

    To locate the centre of resistance of consolidated units of four and six anterior teeth during retraction. Twelve three-dimensional (3D) models were designed in SolidWorks of the anterior segment with four and six teeth and their supporting structure. A proper force system was applied in each model to retract the teeth bodily. The exact location of the centre of resistances (CRes) was determined. It was found that the path of CRes change in four-tooth and six-tooth units according to the anterior teeth torque. A posterior shift of the CRes by increasing the inclination of teeth was shown. However, vertical position has a fluctuant behaviour. First it moves apically, then it moves incisally. Furthermore, results suggest that in en masse retraction, translation can be achieved with a smaller amount of moment-to-force ratio than in four-incisor retraction. In other words, for bodily retraction of anterior incisor segments, we should apply force in a more apical position. Different anterior torques between 7 and 35 degrees, cannot affect the CRes position dramatically. The area of CRes shifting is 0.92 mm (anterioposteriorly) x 0.74 mm (superior-inferiorly) in the six-tooth unit in the teeth model and 0.85 mm (anterioposteriorly) x 0.82 mm (superior-inferiorly) in the teeth and bone model. In the four-tooth model, the area of CRes shifting is 0.97 mm (anterioposteriorly) x 0.93 mm (superior-inferiorly) in tooth model and 0.77 mm (anterioposteriorly) x 0.87 mm (superior-inferiorly) in the teeth and bone model.

  17. Anterior Teeth Splinting After Orthodontic Treatment: 3D Analysis Using Finite Element Method

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    A. Geramy

    2012-01-01

    Full Text Available Objective: Retention after orthodontic treatment is still an important part of the treatment. Splints are considered as an alternative for removable retainers. The main goal of this study was to assess splinting biomechanically.Materials and Methods: Three dimensional finite element models (3D were designed of a mandibular anterior segment which included six anterior teeth with their supporting tissues (model 1 as control and with a bonded lingual fixed retainer in the two other models. The wire cross section was round (0.016” in model 2 and rectangular (0.016” × 0.022” in model 3. The models were designed in Solid Works 2006 and analyzed in ANSYS Workbench Ver. 11.0 SolidWorks Incisors were loaded with a vertical force of 187 N. PDL stress and tooth displacements were evaluated.Results: The numeric findings showed an increase after splinting in the central incisors [2.42 MPa to 4.57 MPa (round and 16.66 (rectangular MPa] in biting with four incisors. Biting with two incisors decreased the stress after splinting [2.42 MPa to 1.7 MPa (round wire and 1.77 MPa (rectangular wire]. In lateral movement, all teeth showed an increased stress except for the working side canine.Conclusion: Splinted cases (with round or rectangular wires can benefit from stress redistribution when biting small food particles and in lateral movement.

  18. Functional-aesthetic treatment of crown fracture in anterior teeth with severe crowding

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    Diego Henrique da Silva Mendonça

    2012-09-01

    Full Text Available Introduction: Traumatic injuries are usually the result of impacts whose aggressive strength exceeds the resistance found in bone, muscle and tooth tissues. With the advent of the etching technique and considering the improvement of composite resins, simpler and more conservative alternatives are indicated in the aesthetic and functional rehabilitation of fractured anterior teeth. Case report and objective: This study aimed to report the treatment of a 13 year-old patient that fractured his central incisor due to a trauma. After clinical and radiographic examination, an oblique crown fracture with extensive involvement of the incisal angle, without pulp exposure or injury to the biological space of the left maxillary central incisor (tooth #21 was observed. Because the fractured tooth fragment was lost, it was not possible to process a fragment bonding. Thus, it was proposed to treat the tooth through direct technique restoration with composite resin. Conclusion: It can be concluded that the aesthetic and functional rehabilitation with direct composite resin is a viable option for the conservative treatment of fractured anterior teeth.

  19. ETIOLOGIC FACTORS AND CLINICAL EVALUATION OF RESTORED FRACTURED ANTERIOR TEETH: AN OBSERVATIONAL STUDY

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    Uzay KOÇ VURAL

    2016-10-01

    Full Text Available Purpose: The aims of this study were to investigate the etiologic factors and to evaluate performance of composite resin on fractured crown in permanent anterior teeth at 6 and 12 months. Subjects and Methods: Records from 51 patients were retrieved from a Dental School Clinic, comprising 73 fractured anterior teeth directly restored with a submicron hybrid composite (Spectrum TPH resin and respective adhesive system (Prime&Bond NT were evaluated. The United States Public Health Service criteria were used to assess the clinical evaluation. Data were analyzed using the Wilcoxon Signed Rank, Kruskal–Wallis, Mann–Whitney U, and Siegel and Castellan tests. Results: Seventy-two maxillary incisors and one canine of 51 patients were evaluated. The patient’s age at the time of therapy ranged from 14 to 64 years old (mean 25.47. Mostly observed crown fracture was seen in upper incisors (84.9% and due to falls (58.8%. At the 6-month follow-up, one patient lost one restoration and at the 12-month, one patient lost one and one lost two restorations. A statistically significant difference was found in terms of marginal adaptation between 6 and 12 months. Conclusion: In this short-term observation period, remaining tooth structure was conserved and good patient compliance was achieved. Factors such as esthetic and/or cost should be considered to indicate the direct composite restorations.

  20. The Shear Bond Strength of Porcelain Laminate to Prepared and Unprepared Anterior Teeth

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    Ali Asghar Alavi

    2017-03-01

    Full Text Available Statement of the Problem: Porcelain laminate veneer is an esthetic restoration used as an alternative to full veneer crowns and requires minimal tooth preparation. In restoration with porcelain laminate veneers, both the longevity of the laminate and conservation of the sound tooth structure are imperative. Purpose: The present study aimed to investigate the shear bond strength of porcelain laminates to prepared- and unprepared- anterior teeth in order to compare their longevity and success rate. Materials and Method: Thirty extracted maxillary central incisors were randomly divided into 3 groups regarding their preparation methods. The preparation methods were full-preparation in group A, full-preparation and finishing with fine diamond bur in group B, and no-preparation, only grinding with diamond bur in group C. After conditioning the teeth, ceramic veneers (IP S e.max were silanated and then cemented with DuoLink luting cement. The shear bond strength was measured for each group and failure mode was determined by stereomicroscopic examination. Results: Group C exhibited the highest shear bond strength. The shear bond strength was significantly different between groups C and B (p 0.05. Adhesion failure mode was found to be more common than the cohesive mode. Conclusion: Regarding the shear bond strength of unprepared anterior teeth to porcelain laminate veneers yielded by this study, no-preparation veneers might be used when the enamel is affected by wearing, trauma, or abrasion. It can also be used in patients who refuse the treatments which involve tooth reduction and preparation.

  1. The Shear Bond Strength of Porcelain Laminate to Prepared and Unprepared Anterior Teeth

    Science.gov (United States)

    Alavi, Ali Asghar; Behroozi, Zeinab; Nik Eghbal, Farid

    2017-01-01

    Statement of the Problem: Porcelain laminate veneer is an esthetic restoration used as an alternative to full veneer crowns and requires minimal tooth preparation. In restoration with porcelain laminate veneers, both the longevity of the laminate and conservation of the sound tooth structure are imperative. Purpose: The present study aimed to investigate the shear bond strength of porcelain laminates to prepared- and unprepared- anterior teeth in order to compare their longevity and success rate. Materials and Method: Thirty extracted maxillary central incisors were randomly divided into 3 groups regarding their preparation methods. The preparation methods were full-preparation in group A, full-preparation and finishing with fine diamond bur in group B, and no-preparation, only grinding with diamond bur in group C. After conditioning the teeth, ceramic veneers (IP S e.max) were silanated and then cemented with DuoLink luting cement. The shear bond strength was measured for each group and failure mode was determined by stereomicroscopic examination. Results: Group C exhibited the highest shear bond strength. The shear bond strength was significantly different between groups C and B (p 0.05). Adhesion failure mode was found to be more common than the cohesive mode. Conclusion: Regarding the shear bond strength of unprepared anterior teeth to porcelain laminate veneers yielded by this study, no-preparation veneers might be used when the enamel is affected by wearing, trauma, or abrasion. It can also be used in patients who refuse the treatments which involve tooth reduction and preparation. PMID:28280760

  2. Over two hundred million injuries to anterior teeth attributable to large overjet: a meta-analysis.

    Science.gov (United States)

    Petti, Stefano

    2015-02-01

    The association between large overjet and traumatic dental injuries (TDIs) to anterior teeth is documented. However, observational studies are discrepant and generalizability (i.e. external validity) of meta-analyses is limited. Therefore, this meta-analysis sought to reconcile such discrepancies seeking to provide reliable risk estimates which could be generalizable at global level. Literature search (years 1990-2014) was performed (Scopus, GOOGLE Scholar, Medline). Selected primary studies were divided into subsets: 'primary teeth, overjet threshold 3-4 mm' (Primary3); 'permanent teeth, overjet threshold 3-4 mm' (Permanent3); 'permanent teeth, overjet threshold 6 ± 1 mm' (Permanent6). The adjusted odds ratios (ORs) were extracted. To obtain the highest level of reliability (i.e. internal validity), the pooled OR estimates were assessed accounting for between-study heterogeneity, publication bias and confounding. Result robustness was investigated with sensitivity and subgroup analyses. Fifty-four primary studies from Africa, America, Asia and Europe were included. The sampled individuals were children, adolescents and adults. Overall, there were >10 000 patients with TDI. The pooled OR estimates resulted 2.31 (95% confidence interval - 95CI, 1.01-5.27), 2.01 (95CI, 1.39-2.91) and 2.24 (95CI, 1.56-3.21) for Primary3, Permanent3 and Permant6, respectively. Sensitivity and subgroup analyses corroborated these estimates. Reliability and generalizability of pooled ORs were high enough and made it possible to assess that the fraction of global TDIs attributable to large overjet is 21.8% (95CI, 9.7-34.5%) and that large overjet is co-responsible for 235 008 000 global TDI cases (95CI, 104,760,000-372,168,000). This high global burden of TDI suggests that preventive measures must be implemented in patients with large overjet. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  3. Malpositioned implants in the anterior maxilla: a novel restorative approach to reestablish peri-implant tissue health and acceptable esthetics. Part II: Case report and discussion.

    Science.gov (United States)

    Moráguez, Osvaldo D; Vailati, Francesca; Belser, Urs C

    2015-01-01

    This two-part case presentation describes the prosthetic challenge of managing complications in a 50-year-old female patient after inadequate esthetic risk assessment, treatment planning, and implant placement in the anterior maxilla. In Part I, the clinical situation was described, and different restorative solutions were proposed to correct the extreme facial inclination of the implants, excluding major surgical procedures, namely implant removal. In Part II, different prosthetic options are discussed, and the final treatment is revealed. A noninvasive treatment protocol was applied to transform a severely compromised postsurgical situation into an esthetically acceptable result. An unconventional prosthesis design was implemented, including the use of ceramic veneers bonded to the CAD/CAM-generated screw-retained zirconia- based fixed dental prosthesis (FDP), to correct major axis-related problems and spatial discrepancies.

  4. Malpositioned implants in the anterior maxilla: a novel restorative approach to reestablish peri-implant tissue health and acceptable esthetics. Part I. Case presentation and treatment options.

    Science.gov (United States)

    Moráguez, Osvaldo D; Vailati, Francesca; Belser, Urs C

    2015-01-01

    This two-part case presentation describes the prosthetic challenge of managing complications after inadequate esthetic risk assessment, treatment planning, and implant positioning in the anterior maxilla. Here, the case report of a 50-year-old woman, referred after inappropriate execution of immediate implant placement, is presented. Different restorative treatment alternatives are proposed, excluding major surgical procedures. In the next part of the article, the advantages and shortcomings of the various prosthetic options will be discussed and the selected treatment revealed. The aim of this part of the article is to illustrate the importance of treatment planning, emphasizing that the correction of esthetic implant failures consistently leads to compromised results when compared to what could have been achieved first time round.

  5. Restoration of endodontically treated anterior teeth: an evaluation of coronal microleakage of glass ionomer and composite resin materials.

    Science.gov (United States)

    Diaz-Arnold, A M; Wilcox, L R

    1990-12-01

    A glass ionomer material was evaluated for coronal microleakage in permanent lingual access restorations of endodontically treated anterior teeth. The material was tested as a restoration, placed over a zinc oxide-eugenol base, and as a base with an acid-etched composite resin veneer and a dentinal bonding agent. Restored teeth were thermocycled, immersed in silver nitrate, developed, and sectioned to assess microleakage. Significant coronal leakage was observed with all materials used.

  6. Comparative photographic evaluation of various geometric and mathematical proportions of maxillary anterior teeth: A clinical study.

    Science.gov (United States)

    Agrawal, Vineet S; Kapoor, Sonali; Bhesania, Dhvani; Shah, Chintul

    2016-01-01

    This study aimed to investigate the existence of the golden proportion, recurring esthetic dental (RED) proportion and golden percentage between the frontal view widths of the maxillary anterior natural dentition among students of Indian origin by the aid of digital photography. This study was conducted with 80 dental students (41 female and 39 male), with ages ranging from 20 to 23 years. Students whose natural smile did not develop any visual tension with regard to the study's and their own criteria were selected as having an esthetic smile. Photographs were taken, and the mesiodistal widths of six maxillary anterior teeth were measured digitally using software. Once the measurements were recorded three different theories of proportion were applied and statistical analysis was done. The golden proportion, i.e., 62% RED proportion and golden percentage were not observed in the subjects. According to the subjects evaluated, the average width of the maxillary lateral incisor was 72% of the frontal view width of the central incisor. The average width of the canine was 84% of the frontal view width of the lateral incisor. The golden proportion and RED proportion were not observed in the natural smiles of subjects who were deemed to have an esthetic smile. The values proposed for the golden percentage theory were not observed in subjects with an esthetic smile. Average frontal view percentage widths of the maxillary anterior dentition exist and can be useful in predicting naturally occurring widths in smiles deemed to be esthetic in a specific population.

  7. Torque Loss in En-Masse Retraction of Maxillary Anterior Teeth Using Miniimplants with Force Vectors at Different Levels: 3D FEM Study

    OpenAIRE

    Parashar, Abhishek; Aileni, Kaladhar Reddy; Rachala, Madhukar Reddy; Shashidhar, Nagam Reddy; Mallikarjun, Vankre; Parik, Nupur

    2014-01-01

    Objective: This FEM study was conducted to quantify the amount of torque loss in maxillary anterior teeth by applying force vectors from different levels to the anterior retraction hook at various heights and comparing with that of molar anchorage system.

  8. Effect of retraction of anterior teeth on pharyngeal airway and hyoid bone position in Class I bimaxillary dentoalveolar protrusion.

    Science.gov (United States)

    Bhatia, S; Jayan, B; Chopra, S S

    2016-12-01

    To test the hypothesis that the retraction of anterior teeth has no effect on the dimensions of pharyngeal airway and to evaluate the retraction of anterior teeth on each parameter of pharyngeal airway. Twenty-two adult patients of Class I bimaxillary protrusion requiring first premolar extractions with maximum anchorage requirements were selected. The pharyngeal airway and dentofacial parameters of the patients were compared using pre- and post-treatment lateral cephalograms with the help of Student's paired t-test (P bimaxillary protrusive adult patients.

  9. Ceramic restorations of anterior teeth without proximal reduction: a case report.

    Science.gov (United States)

    Nakamura, Takashi; Nakamura, Toshio; Ohyama, Tatsuo; Wakabayashi, Kazumichi

    2003-01-01

    The primary advantage of using all-ceramic restorations is to reproduce a color and translucency close to those of the natural tooth. Additionally, it is anticipated that the use of an adhesion technique will allow a ceramic restoration without removing tooth structure in some patients. This case report describes the use of proximally bonded ceramic restorations for the closure of an anterior diastema without proximal tooth reduction. A silane coupling agent and a resin cement were used for bonding. The diastema was close with the ceramic restorations, which provided a natural appearance of the teeth. It was concluded that ceramic restorations without proximal tooth reduction was effective in improving esthetics, if the case was properly selected.

  10. Anterior and middle superior alveolar nerve block for anesthesia of maxillary teeth using conventional syringe

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    Ignacio Velasco

    2012-01-01

    Full Text Available Background: Dental procedures in the maxilla typically require multiple injections and may inadvertently anesthetize facial structures and affect the smile line. To minimize these inconveniences and reduce the number of total injections, a relatively new injection technique has been proposed for maxillary procedures, the anterior and middle superior alveolar (AMSA nerve block, which achieves pulpal anesthesia from the central incisor to second premolar through palatal approach with a single injection. The purpose of this article is to provide background information on the anterior and middle superior alveolar nerve block and demonstrate its success rates of pulpal anesthesia using the conventional syringe. Materials and Methods: Thirty Caucasian patients (16 men and 14 women with an average age of 22 years-old, belonging to the School of Dentistry of Los Andes University, were selected. All the patients received an AMSA nerve block on one side of the maxilla using the conventional syringe, 1 ml of lidocaine 2% with epinephrine 1:100.000 was injected to all the patients. Results: The AMSA nerve block obtained a 66% anesthetic success in the second premolar, 40% in the first premolar, 60% in the canine, 23.3% in the lateral incisor, and 16.7% in the central incisor. Conclusions: Because of the unpredictable anesthetic success of the experimental teeth and variable anesthesia duration, the technique is disadvantageous for clinical application as the first choice, counting with other techniques that have greater efficacy in the maxilla. Although, anesthetizing the teeth without numbing the facial muscles may be useful in restorative dentistry.

  11. Forced orthodontic extrusion for anterior traumatized teeth by a simplistic approach

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    Sameer Sidhagouda Patil

    2014-01-01

    Full Text Available The management of patients with traumatic injuries to their dentition is an integral part of the general dental practice. Anterior teeth with fractures that extend subgingivally require a complex treatment plan that addresses biologic, esthetic, and functional factors, such as mastication and speech. Treatment of crown fractures often requires a multi-disciplinary approach. However, crown-root fractures with fracture line below the gingival attachment or alveolar bone crest present restorative difficulties. This case report presents a 24-year-old male who reported with fractured upper right lateral and central incisors and upper left central incisor following road traffic accident. On clinical examination, it was observed that the upper right lateral incisor had a horizontal fracture at the cervical one-third level with the fracture line extending subgingivally, mid crown fracture of right central incisor and incisal fracture of left central incisor. All the traumatized teeth were first treated endodontically, and then referred to our department for orthodontic extrusion before permanent crown placement.

  12. 上颌埋伏前牙的正畸治疗%Maxilary anterior teeth in the orthodontic treatment

    Institute of Scientific and Technical Information of China (English)

    陈斯军; 高红燕; 葛建华

    2012-01-01

      目的观察上颌埋伏前牙正畸治疗的临床疗效。方法对临床18例24颗上颌埋伏前牙患者采用固定正畸开拓间隙后,使其自行萌出,或者结合牙槽外科开窗术,对埋伏牙进行牵引治疗。结果24颗埋伏前牙均矫正至牙列正常位置,且牙髓活力正常,牙根无吸收。结论应用固定正畸矫正技术可有效保存上颌埋伏前牙。%  objective: to observe the maxilary anterior teeth in the clinical efficacy of orthodontic treatment. Methods: 18 cases of clinical 24 star in maxilary anterior teeth were treated with fixed orthodontic development gap, make its appear on its own, or combined with alveolar surgery fenestration of embedded teeth for traction therapy. Results: 24 a lie in front teeth are correct to dentition normal position, and dental pulp vitality normal, root no absorption. Conclusion: the application of fixed orthodontic correction technology can effectively save in maxilary anterior teeth.

  13. Clinical Efficiency of Two Sequences of Orthodontic Wires to Correct Crowding of the Lower Anterior Teeth

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    Cláudia Maria de Castro Serafim

    2015-01-01

    Full Text Available This study compared time to correction of mandibular anterior crowding using two arch wire sequences, one with conventional nickel-titanium (NiTi arch wires and the other with conventional and NiTi heat-activated arch wires. Twenty-two boys and girls (mean age: 16.68 ± 2.66 with moderate crowding (3–6 mm were assigned randomly to one of two groups and followed up for five months (six assessments when arch wires were changed. Time to crowding correction was analyzed statistically using the Kaplan-Meier method. Data were collected during the five-month follow-up, and time to correction was compared between groups using the log rank test. At the end of follow-up, mandibular crowding was corrected in 100% of the cases in the group treated with the sequence that included NiTi heat-activated arch wires, whereas about 30% of those treated with NiTi arch wires were not completely corrected. There was a significant difference in time to complete treatment between groups (log rank = 5.996; p<0.05. In the group treated with the sequence that included heat-activated wires, alignment and leveling of mandibular anterior teeth were completed earlier than in the group treated only with conventional NiTi arch wires. Clinical trial registration is found at RBR-7g5zng.

  14. Correlation Between Bone and Soft Tissue Thickness in Maxillary Anterior Teeth

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    Nasrin Esfahanizadeh

    2016-12-01

    Full Text Available Objectives: The purpose of this study was to determine buccal bone and soft tissue thicknesses and their correlation in the maxillary anterior region using cone beam computed tomography (CBCT.Materials and Methods: In this cross sectional study, 330 sound maxillary incisors in 60 patients with a mean age of 37.5 years were assessed by CBCT scans. For better visualization of soft tissue, patients were asked to use plastic retractors in order to retract their lips and cheeks away from the gingival tissue before taking the scans. Measurements were made in three different positions: at the crest and at 2 and 5mm apical to the crest. The cementoenamel junction‒crest distance was measured. for data analyses, the Pearson’s correlation coefficient, ANOVA and intraclass correlation coefficient were used.Results: There were mildly significant linear associations between labial soft tissue and bone thickness in the canines and incisors (r<0.40, P<0.05, but no association was found for the lateral incisors. The mean thickness of buccal bone differed significantly in the maxillary anterior teeth, being greater for the lateral incisors (P<0.05. For soft tissue thickness, the results were the same, and the least thickness was recorded for the canines. There was a mild association between labial soft tissue and bone thickness in canines and incisors (r=0.2, P=0.3, but no such linear association was seen for the lateral incisors.Conclusions: The mean thickness of buccal bone and soft tissue in the anterior maxilla was <1mm and there was a mild linear correlation between them.Keywords: Facial Bones; Cone-Beam Computed Tomography; Maxilla; Esthetics, Dental

  15. Comparative photographic evaluation of various geometric and mathematical proportions of maxillary anterior teeth: A clinical study

    Directory of Open Access Journals (Sweden)

    Vineet S Agrawal

    2016-01-01

    Full Text Available Aim: This study aimed to investigate the existence of the golden proportion, recurring esthetic dental (RED proportion and golden percentage between the frontal view widths of the maxillary anterior natural dentition among students of Indian origin by the aid of digital photography. Materials and Methods: This study was conducted with 80 dental students (41 female and 39 male, with ages ranging from 20 to 23 years. Students whose natural smile did not develop any visual tension with regard to the study′s and their own criteria were selected as having an esthetic smile. Photographs were taken, and the mesiodistal widths of six maxillary anterior teeth were measured digitally using software. Once the measurements were recorded three different theories of proportion were applied and statistical analysis was done. Results: The golden proportion, i.e., 62% RED proportion and golden percentage were not observed in the subjects. According to the subjects evaluated, the average width of the maxillary lateral incisor was 72% of the frontal view width of the central incisor. The average width of the canine was 84% of the frontal view width of the lateral incisor. Conclusion: The golden proportion and RED proportion were not observed in the natural smiles of subjects who were deemed to have an esthetic smile. The values proposed for the golden percentage theory were not observed in subjects with an esthetic smile. Average frontal view percentage widths of the maxillary anterior dentition exist and can be useful in predicting naturally occurring widths in smiles deemed to be esthetic in a specific population.

  16. In vitro evaluation of fracture resistance of Fiber-Reinforced Composite inlay bridges in upper anterior and lower posterior teeth

    Directory of Open Access Journals (Sweden)

    Jalalian E.

    2007-07-01

    Full Text Available Background and Aim: Considering flexural strength of fiber-reinforced composites (FRC and also the role of conservative cavities in protecting sound tissue of abutments, the aim of this study was to evaluate the fracture resistance of these bridges by handmade samples in vitro.Materials and Methods: In this experimental in vitro study, 44 sound newly extracted teeth were used to make 22 fixed inlay bridges including 11 three unit anterior upper inlay bridges substituting clinical model of upper central and 11 three unit posterior lower inlay bridges substituting clinical model of lower first molar. Specimens were prepared with FRC and mounted with artificial PDL in acryl. Cases were exposed to final load by using Universal Testing Machine (Instron 1195 with the speed of 1 mm/min. Statistical analysis was performed by Kolmogorov- Smirnov, independent sample T and Kaplan-Meier tests with p<0.05 as the level of significance.Results: Based on the statistical tests, the 95% confidence interval of mean was 450-562 N in anterior and  1473- 1761 N in posterior area. Fracture strength was high in the studied groups. Fractures in both groups occurred on composite facing, and the framework remained intact. The highest percentage of fracture in posterior teeth was in the middle of pontic towards the distal connector and in the anterior teeth in the lateral connector, between central pontic and lateral abutment. Using the independent sample T  test a significant statistical difference was observed between two groups (P<0.001. The fracture resistance of anterior samples was lower than the posterior ones.Conclusion: Based on the results of this study regarding the high fracture resistance in both areas FRC inlay bridges could be recommended for upper anterior and lower posterior teeth in clinical dentistry certainly more studies are needed to ascertain this treatment option.

  17. Root and canal symmetry in the mandibular anterior teeth of patients attending a dental clinic: CBCT study

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    Guven KAYAOGLU

    2015-01-01

    Full Text Available The aims of this study were to evaluate the number of roots/root canals in the mandibular anterior teeth of a Turkish population, to assess the relationship between gender or age and the frequency of two canals in a single root, and to determine the symmetry in root/root canal numbers between contralateral sides among patients. Cone-beam computed tomography images (n = 1128; 6253 teeth taken at the Department of Dentomaxillofacial Radiology of the Faculty of Dentistry of Gazi University were examined by three observers and a supervisor, all of whom were blinded to patient gender and age. Axial, sagittal, and cross-sectional slices with a thickness of 1 mm were used. Numbers of roots and canals for each type of tooth were recorded. Most teeth had a single root and single root canal. Roots with two canals were more frequent in the incisors (14.9%, 17.2%, and 6.1% of the central incisors, lateral incisors, and canines, respectively. Teeth with two roots were more frequent in the canines (3.1%vs. 0% or 0.1%. Females more often had canines with double root canals (p < 0.001. When at least one tooth had two root canals, bilateral symmetry between contralateral teeth was found in 45.0%, 29.0%, and 28.0% of cases for central incisors, lateral incisors, and canines, respectively. Patients older than 56 years had fewer teeth with double root canals (p ≤ 0.001. A small proportion of the mandibular anterior teeth had two roots or root canals. Double root canals were mostly unilateral. Age and gender were associated with the number of root canals.

  18. Effectiveness of submucosal dexamethasone to control postoperative pain & swelling in apicectomy of maxillary anterior teeth.

    Science.gov (United States)

    Shah, Shahzad Ali; Khan, Irfanullah; Shah, Humera Shahzad

    2011-07-01

    The purpose of this study was to evaluate the effect of submucosal dexamethasone injection to control postoperative pain and swelling in apicectomy of maxillary anterior teeth. A randomized, controlled trial comprising 60 adult patients (68.3% male, 31.7% female) with no local or systemic problems was conducted. Patients were randomly divided into two groups: Group A was given 4mg dexamethasone injection perioperatively. Group B (control group) was treated conventionally without any steroid injection. Postoperative pain and swelling was evaluated using a visual analog scale (VAS). Objective measurements of facial pain and swelling were performed daily up to six days postoperatively. Dexamethasone group showed significant reduction in pain and swelling postoperatively compared with the control. Submucosal dexamethasone 4mg injection is an effective therapeutic strategy for swift and comfortable improvement after surgical procedure and has a significant effect on reducing postoperative pain and swelling. The treatment offers a simple, safe, painless, noninvasive and cost effective therapeutic option for moderate and severe cases.

  19. Esthetic rehabilitation of worn anterior teeth with thin porcelain laminate veneers.

    Science.gov (United States)

    Gresnigt, Marco; Ozcan, Mutlu; Kalk, Warner

    2011-01-01

    Bonded porcelain restorations are a predictable and durable treatment option with which not only esthetic appearance but also the strength and function of teeth can be re-established. One of the most important issues of today's dentistry is the preservation of sound enamel. Following biomimetic principles, employing minimally invasive applications and adhesive technologies are of paramount importance for successful restorations. The mock-up technique is advised for delicate removal of the required space for thin porcelain veneers minimally. Besides minimally invasive preparation, long-term success is determined by the adhesive quality of the laminate veneers. This case presentation demonstrates restoration of anterior dentition where the wear of incisal edges posed a negative effect on the smile of the patient. Before bonded porcelain veneers were adhesively cemented, incisal lengthening with direct resin composite and gingival contouring was performed. By using the mock-up technique, minimal preparations were made with the outline ending in enamel only. For cementation of these restorations, step-by-step adhesive procedures are presented.

  20. Proportions of maxillary anterior teeth relative to each other and to golden standard in tabriz dental faculty students.

    Science.gov (United States)

    Parnia, Fereydoun; Hafezeqoran, Ali; Mahboub, Farhang; Moslehifard, Elnaz; Koodaryan, Rodabeh; Moteyagheni, Rosa; Saleh Saber, Fariba

    2010-01-01

    Various methods are used to measure the size and form of the teeth, including the golden pro-portion, and the width-to-length ratio of central teeth, referred to as the golden standard. The aim of this study was to eval-uate the occurrence of golden standard values and golden proportion in the anterior teeth. Photographs of 100 dentistry students (50 males and 50 females) were taken under standard conditions. The visible widths and lengths of maxillary right and left incisors were calculated and the ratios were compared with golden standard. Data was analyzed using SPSS 14 software. Review of the results of the means showed statistically significant differences between the width ratio of right lateral teeth to the central teeth width with golden proportion (Pmean differences showed that the mean difference between proportion of right laterals to centrals with golden proportion was significant (Pgolden proportion among maxillary incisors. The review of results of mean differences for single samples showed that the mean differences between the proportion of width-to-length of left and right central teeth was statistically significant by golden standard (Pgolden standard exists. In the evaluation of the width-to-width and width-to-length proportions of maxillary incisors no golden proportions and standards were detected, respectively.

  1. BILATERAL MOLARIFORM SUPERNUMERARY TEETH IN THE ANTERIOR MAXILLA: A REPORT OF TWO CASES

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    Mehmet Cem ÖZDEN

    2017-01-01

    Full Text Available Supernumerary teeth are additional teeth besides the normal series and can be found in any region of the dental arch. Supernumerary teeth can be classified according to their form and locations. Early diagnosis and treatment of patients with supernumerary teeth may prevent or minimize complications. The treatment options depend on the type and position of the supernumerary tooth and its effect on the adjacent structures. Two male patients were referred to our clinic due to swelling in their maxillae and interrupted eruption of teeth. Upon radiological examination of the patients, impacted supernumerary teeth were found. Surgical removal of these teeth were perfomed and they were found to be molariform. We aim to present the two rare cases of molariform supernumerary teeth in this article.

  2. Glass Fibre-Reinforced Composite Post and Core Used in Decayed Primary Anterior Teeth: A Case Report

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    Leena Verma

    2011-01-01

    Full Text Available Aesthetic requirement of severely mutilated primary anterior teeth in the case of early childhood caries has been a challenge to pediatric dentist. Among restorative treatment options, prefabricated crown and biological and resin composite restoration either by means of direct or indirect technique are mentioned in the literature. This paper presents the clinical sequence of rehabilitation of maxillary anterior primary teeth. Endodontic treatment was followed by the placement of a glass fibre-reinforced composite resin post. The crown reconstruction was done with composite restoration. Resin glass fibre post has best properties in elasticity, translucency, adaptability, tenaciousness, and resistance to traction and to impact. Along with ease of application, fiber can be used as an alternative to traditionally used materials in the management of early childhood caries.

  3. A Comparative Study on the Relationship Between Inter Alar Width, and Inter Commissural Width on Circumferential Arc Width of Maxillary Anterior Teeth in Different Age Groups

    National Research Council Canada - National Science Library

    Kurien, Anjana; Cherian, K P; Mhatre, Shirley; Tharakan, Renji George

    2014-01-01

    This study was done to determine the relationship between interalar width and inter commissural width on circumferential arc width of maxillary anterior teeth in dentulous subjects between the age groups of 20–50 years...

  4. Prevalence of Traumatic Dental Injuries to Anterior Teeth of 12-Year-Old School Children in Kashmir, India

    Science.gov (United States)

    Ain, Tasneem S.; Lingesha Telgi, Ravishankar; Sultan, Saima; Tangade, Pradeep; Ravishankar Telgi, Chaitra; Tirth, Amit; Kumar Pal, Sumit; Gowhar, Owais; Tandon, Vaibhav

    2016-01-01

    Background Traumatic dental injuries to anterior teeth are a significant public health problem, not only because their prevalence is relatively high, but also because they have considerable impact on children’s daily lives. Traumatic dental injuries (TDIs) cause physical and psychological discomfort, pain and other negative impacts, such as tendency to avoid laughing or smiling, which can affect social relationships. Objectives This study aimed to assess the prevalence of traumatic dental injuries to anterior teeth among 12-year-old school children in Kashmir, India. Patients and Methods A cross-sectional study was conducted in private and government schools of India among 1600 schoolchildren aged 12 years. In addition to recording of the type of trauma (using Ellis and Davey classification of fractures, 1970), over jet, Angle’s molar relation and lip competence were also recorded. The socioeconomic status and academic performance of the study subjects were registered. The data obtained were compiled systematically and then statistically analyzed. The statistical significance for the association between the traumatic injury and the variables was analyzed using the chi-square test. Logistic regression was used to identify potential risk predictors of TDIs. Results The overall prevalence of TDI to anterior teeth was found to be 9.3%. The TDI to anterior teeth in male was more than female, but the difference was statistically nonsignificant (P sports were the most common causes of trauma in the present study. The highest potential risk factor for the occurrence of trauma was over jet. Academic performance was found to be significantly associated to TDI to anterior teeth, when analyzed in a multiple regression model. Conclusions It was concluded that the prevalence of traumatic dental injuries was 9.3%. Traumatic dental injuries among children exhibit complex interaction between the victims’ oral conditions and their behavior. Therefore, prevention should

  5. To evaluate the use of modified power arm [Discopender 468] for efficient anterior teeth retraction - A clinical study

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    Hemavathi Patil

    2017-01-01

    Full Text Available Introduction: Many new bracket prescriptions and Techniques have been developed and modified as treatment mechanics progress to create force system that can work efficiently and shorten the orthodontic treatment period. Aim of this study was to evaluate the use of modified power arm [Discopender 468] for efficient anterior Teeth retraction, to determine anchorage loss and upper incisor changes after space closure. Material & Method: Ten patients of class II division1were selected to need maxillary first premolars was extracted and the retraction of anterior teeth was carried out segmentally by using discopender468 which applies variable force with respect to height of power arm. To prevent anchor loss during anterior retraction we have placed the mini implant screw mesial to 1stmolar bilaterally in maxillary arch. Pre and post lateral cephalograms were taken to determine the anchorage loss and upper incisor changes. Result and Conclusion: Anterior retraction carried out by a new design of discopender 468 and minim plant brings out controlled bodily tooth movement and also has variable force vectors, which is one of the variable method to use for retraction in Straight Wire Appliance in day to day orthodontic practices and also has advantage over conventional retraction mechanics.

  6. In Vitro Comparison of Instrumentation Time and Cleaning Capacity between Rotary and Manual Preparation Techniques in Primary Anterior Teeth

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    Z. Bahrololoomi

    2007-06-01

    Full Text Available Objective: The aim of this study was to evaluate and compare the cleaning ability and instrumentation time of manual and rotary methods used for preparation of primary an-terior teeth.Materials and Methods: Forty-four primary anterior teeth were used in this experi-mental study. Access cavities were prepared and India ink was injected into the canals. The samples were divided into three groups according to the instrument and preparation technique. In group I the root canals were manually instrumented with K-files. Rotary Flexmaster instruments were used for canal preparation in Group II, and the samples in Group III (control were not instrumented. After canal preparation, the teeth were cleared with methyl salicilate and the removal of India ink was measured in the cervical, middle and apical thirds. The incidence of file breakage and instrumentation time was recorded in the three study groups. Statistical analysis was performed using Mann-Whitney and t-tests.Results: There was no significant difference in cleaning capacity between the two tech-niques, but a significant difference was found between the experimental and control groups. Working time was significantly shorter when using the rotary system. No file fracture was observed during the study period.Conclusion: Regarding the shorter working time for rotary instrumentation and the similar cleaning ability of the two techniques, the application of the rotary system is suggested for preparation of decidious root canals during pulpectomy.

  7. Revascularization with and without platelet-rich plasma in nonvital, immature, anterior teeth: a pilot clinical study.

    Science.gov (United States)

    Jadhav, Ganesh; Shah, Naseem; Logani, Ajay

    2012-12-01

    This study was conducted to evaluate and compare maturogenesis induced by revascularization with and without platelet-rich plasma (PRP). Twenty patients with nonvital, immature anterior teeth were randomly categorized into 2 groups. Subsequent to chemomechanical preparation, revascularization with and without PRP carried on a collagen sponge was induced in groups 1 and 2, respectively. The cases were followed up clinically and radiographically at 6- and 12-month intervals. Clinically, all cases were asymptomatic with complete resolution of signs and symptoms. Radiographically, there was a marked difference in periapical healing, apical closure, and dentinal wall thickening in group 2 in comparison with group 1. However, root lengthening was comparable for both of the procedures. Revascularization is a conservative and an effective method for inducing maturogenesis in nonvital, immature teeth. Supplementations with PRP can potentially improve the desired biological outcome of this regenerative technique. Copyright © 2012 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  8. The size of anterior teeth in patients with gaps in the upper dental arch

    National Research Council Canada - National Science Library

    Sękowska, A; Dunin-Wilczyńska, I; Chałas, R

    2015-01-01

    .... Patients with severe malocclusion, missing teeth and periodontal disease were excluded. Width-to-length (W/L) ratio of the clinical crown of the central, lateral incisors and canines for both sides was measured...

  9. Multiple Impacted Permanent and Supernumerary Teeth in the Anterior Mandible of Nonsyndromic Case: A Systematic Review and Multidisciplinary Approach to Management

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    Pushkar Gawande

    2015-01-01

    Full Text Available Multiple impacted permanent and supernumerary teeth have been associated with the syndromes and metabolic disorders. Approximately, 75% of all the supernumerary teeth are impacted and are asymptomatic. Consequently, most such teeth constitute casual findings in the context of routine X-ray studies. Lack of eruptive force and rotation of tooth buds may cause multiple impactions, and additional examinations may be necessary to exclude systemic and metabolic conditions. We present a rare nonsyndromic case with 11 multiple impacted teeth in the anterior mandible, with systematic literature review and multidisciplinary management.

  10. Fixed functional space maintainer: novel aesthetic approach for missing maxillary primary anterior teeth

    OpenAIRE

    Khare, Vikram; Nayak, Prathibha Anand; Khandelwal, Vishal; Nayak, Ullal Anand

    2013-01-01

    The first-line treatment of non-restorable traumatically injured or carious deciduous teeth is extraction which may be a curse for the future dentition as well as social activity of a child. Various therapeutic modalities from removable partial dentures to fixed space maintainer can be used for replacement of such lost teeth. Two types of fixed aesthetic space maintainers for replacing premature loss of maxillary deciduous incisors in 4-year-old children are discussed.

  11. Fixed functional space maintainer: novel aesthetic approach for missing maxillary primary anterior teeth.

    Science.gov (United States)

    Khare, Vikram; Nayak, Prathibha Anand; Khandelwal, Vishal; Nayak, Ullal Anand

    2013-06-03

    The first-line treatment of non-restorable traumatically injured or carious deciduous teeth is extraction which may be a curse for the future dentition as well as social activity of a child. Various therapeutic modalities from removable partial dentures to fixed space maintainer can be used for replacement of such lost teeth. Two types of fixed aesthetic space maintainers for replacing premature loss of maxillary deciduous incisors in 4-year-old children are discussed.

  12. Surgical exposure and crown lengthening for management of complicated fractures of maxillary anterior teeth. A case report.

    Science.gov (United States)

    Anand, Pradeep S; Ashok, Sukumaran; Nandakumar, K; Varghese, N O; Kamath, Kavitha P

    2013-11-01

    When a tooth fracture occurs, the fracture line can extend in a variety of directions, and the direction of the fracture line often dictates the treatment plan. In cases where fracture lines extend apical to the gingival margin, exposure of fractured margins becomes necessary. And management of such tooth fractures often requires an interdisciplinary approach involving endodontic, periodontic and restorative procedures. This article describes a case in which severely traumatized maxillary anterior teeth were managed by a combined approach involving surgical exposure and crown lengthening, endodontic and restorative procedures.

  13. Premature loss of primary anterior teeth due to trauma--potential short- and long-term sequelae.

    Science.gov (United States)

    Holan, Gideon; Needleman, Howard L

    2014-04-01

    Traumatic dental injuries (TDIs) can result in the premature loss of primary anterior teeth due to an immediate avulsion, extraction later after the injury because of poor prognosis or late complications, or early exfoliation. There are a number of potential considerations or sequelae as a result of this premature loss that have been cited in the dental literature, which include esthetics, quality of life, eating, speech development, arch integrity (space loss), development and eruption of the permanent successors, and development of oral habits. This article provides a comprehensive review of the dental literature on the possible consequences of premature loss of maxillary primary incisors following TDI.

  14. Improving the esthetic replacement of missing anterior teeth: interaction between periodontics and a rotational path removable partial denture.

    Science.gov (United States)

    Goncalves, Leticia Machado; Bezerra-Junior, Jose Ribamar Sabino; Benatti, Bruno Braga; Santana, Ivone Lima

    2011-01-01

    The rotational path of insertion concept for removable partial dentures (RPDs) can be used in esthetically demanding situations. This clinical report describes the treatment of a patient with an anterior maxillary edentulous area using a rotational path RPD. To optimally improve gingival esthetics and to allow proximal retention on the surveyors, a crown-lengthening surgical procedure was performed prior to prosthetic treatment on all teeth involved in this rehabilitation. When correctly planned and fabricated, this prosthesis allows excellent functional and esthetic results, minimizes tooth preparation, and reduces the tendency toward plaque accumulation.

  15. The center of resistance of maxillary anterior teeth and its clinical implication%上颌前牙的阻抗中心及其临床应用

    Institute of Scientific and Technical Information of China (English)

    徐凡; 唐国华

    2016-01-01

    In premolar extraction orthodontic cases, four incisors or six anterior teeth are usually retracted en masse. The torque and vertical control of maxillary anterior teeth is the key to success. The center of resistance ( CR) is an important biomechanical factor that determines the mode of orthodontic tooth movement. If a force is applied with a line of action passing through the CR of maxillary ante-rior teeth, the anterior teeth will undergo bodily movement. Otherwise, inclination movement will occur. This review discussed the fac-tors affecting the position of CR of maxillary anterior teeth and the clinical related implications.%正畸拔牙病例内收前牙时,常采用4个或6个前牙的整体移动,对上前牙转矩和垂直方向的控制是治疗成败的关键.阻抗中心是影响牙齿移动的重要生物力学概念.作用力通过前牙的阻抗中心时,前牙将产生整体移动.反之,则发生倾斜移动.该文旨在对上颌前牙阻抗中心的研究进展及其临床应用作一综述.

  16. En masse retraction versus two-step retraction of anterior teeth in extraction treatment of bimaxillary protrusion.

    Science.gov (United States)

    Felemban, Nayef H; Al-Sulaimani, Fahad F; Murshid, Zuhair A; Hassan, Ali H

    2013-01-01

    In the present report, two techniques of space closure; two-step anterior teeth retraction (TSR) and en masse retraction (ER) were used in two adult patients who had bimaxillary protrusion and were treated with four premolar extractions and fixed orthodontic appliance therapy. Both patients had a Class I dental malocclusion and the same chief complaint, which is protrusive lips. Anterior teeth were retracted by two-step retraction; canine sliding followed by retraction of incisors with T-loop archwire in the first patient and by en masse retraction using Beta titanium alloy T-loop archwire in the second case. At the end of treatment, good balance and harmony of lips was achieved with maintenance of Class I relationships. The outcome of treatment was similar in the two patients with similar anchorage control. ER can be an acceptable alternative to the TSR during space closure since it is esthetically more acceptable. However, it requires accurate bending and positioning of the T-loop.

  17. Greyish shadow on the labial gingival margin after insertion porcelain fused to metal crown on anterior teeth

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    Ike Damayanti Habar

    2016-06-01

    Full Text Available The crown is the type of restoration that replaces lost tooth structure caused by caries, trauma, or other causes which aims to restore comfort, function and patient confidence. Porcelain fused to metal restorationis an option that dominate the aesthetic restoration crown sand fixed prosthesisover the last 50 years. Porcelain fused to metal crown, consists of porcelain layer bonded to a thin cast metal coping that fits over the tooth preparation. Such a restoration combines the strength  and accurate fit of a cast metal crown with  the cosmetic effect of a porcelain crown. In some cases, it looks greyish shadow on the labial gingival margin after insertion porcelain fused to metal crowns on anterior teeth that can not be hidden even if the placement of the edge in subgingival. The purpose of this case report is to determine the cause of a greyish shadow on the labial gingival margin after insertion porcelain fused to metal crowns on anterior teeth and how to prevent a greyish shadow very disturbing aesthetics of the patient.

  18. Prevalence of traumatic dental injuries to the anterior teeth among three to thirteen-year-old school children of Tamilnadu

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    Mohan Govindarajan

    2012-01-01

    Full Text Available Context: Dental trauma has become an important attribute of dental public health. The primary requisite before actively dealing with such problems is to describe the extent, distribution, and associated variables with the specific condition. Aims: The aim of the present study was to assess the prevalence and distribution of traumatic dental injuries (TDI to anterior teeth among 3 to 13 years old Chidambaram school children. Settings and Design : A cross-sectional study was conducted. Data was collected through a survey form and clinical examination. Materials and Methods: A total of 3200 school children in the age group of 3-13 years were selected from 10 schools of Chidambaram, Tamilnadu. Information concerning sex, age, cause of trauma, number of injured teeth, type of the teeth, lip competence, terminal plane relationship and the molar relationship were recorded. Statistical Analysis Used: The statistical software EPIINFO (Version 6.0 was used for statistical analysis. In the present study, P≤0.05 was considered as the level of significance. Results: The trauma prevalence in the present study was 10.13%. Children with class I type 2 and mesial step molar relationship exhibited more number of dental injuries. Enamel fracture was the most common injury recorded. Only 3.37% of the children had undergone treatment. Conclusion: The high level of dental trauma and low percentage of children with trauma seeking treatment stresses the need for increased awareness in Chidambaram population.

  19. TAM PROTEZ ESTETİĞİNDE ÜST ÖN DİŞLER İÇİN KULLANILAN ORANLAR / USE MATHEMATIC PROPORTION FOR MAXILLAR ANTERIOR TEETH IN ESTHETIC OF COMPLETE DENTURE

    OpenAIRE

    KURT, Ayşegül; IŞIK ÖZKOL, Gülbahar

    2011-01-01

    ABSTRACTSelecting and setting up the six maxillary anterior teeth in edentulous patients are important in establishing esthetic. The choice of artificial teeth is complex, when no natural teeth remain and no pre-extraction records are available. There are three different mathematical proportions mentioned in dental literature for choosing and setting up the anterior artificial teeth in smiling esthetics. These mathematical proportions are assesed in the review. As a conclusion, when evaluatin...

  20. Effect of pulp tester probe placement site on the response of maxillary anterior teeth

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    Jalil Modaresi

    2012-01-01

    Full Text Available Background and Aims: Electric pulp testing is used for diagnosis of the pulp status. This test is technique sensitive and hence may elicit positive or negative false response in case of inaccurate use. The optimal site for placement of the probe tip has not been determined. The aim of this study was to evaluate the effect of pulp tester probe placement site on the response of maxillary teeth.Materials and Methods: A total of 378 teeth (126 central incisors, 126 lateral incisors and 126 canines in 67 voluntary 20-35 year-old patients were selected. Three sites on each tooth (incisal edge, labial and lingual surfaces were tested with an electrical pulp tester and responses were recorded. Data were analyzed by Repeated Measure ANOVA test.Results: The central teeth showed significantly lower sensation threshold than lateral and canine teeth (P<0.001. The incisal edge of tooth were significantly more sensitive compared to labial and lingual surfaces (P=0.008.Conclusion: This study showed that the optimum site for placement of pulp tester probe was incisal edge.

  1. Clinical Evaluation of Direct Composite Resin Restorations in Fractured Anterior Teeth

    OpenAIRE

    Ramírez Barrantes DDS, MS, PhD, Juan Carlos; Araujo Jr DDS, MS, PhD, Edson; Narciso Baratieri DDS, MS, PhD, Luiz

    2015-01-01

    he aim of this In Vivo study was to evaluate the influence of the cavosurface angle (with bevel, and no preparation), of direct composite resin restorations in previous fractured teeth after 4 years of clinical performance. The restorations were performed by a single operator, following a restorative standardized protocol. For the study were selected 24 upper central incisors with fracture or with class IV restorations with an indication of replacement. According to the restorative technique,...

  2. Cone-beam computed tomography as a surgical guide to impacted anterior teeth

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    Fabiano Jeremias

    2016-01-01

    Full Text Available Surgical procedure for removal of impacted teeth is a challenge for clinicians as it involves accuracy in the diagnosis and localization of the dental elements. The cone-beam computed tomography (CBCT, compared to the conventional radiography, has a greater potential to provide complementary information because of its three-dimensional (3D images, reducing the possibility of failures in surgical procedures. Two 10-year-old boys presented with aesthetic issues associated with the juxtaposition of ectopic teeth with the permanent ones. Both two-dimensional and 3D preoperative radiographic diagnostic sets were produced. The occlusal and panoramic radiographs were not enough for proper localization of impacted incisors. Thus, the CBCT was used as a surgical guide. After 2 years of longitudinal following, no lesion was recorded, and the orthodontic treatment has proven successful. In all cases, CBCT contributed to both diagnosis and correct localization of supernumerary teeth, aiding the professional in the treatment planning, and consequently in the clinical success. The surgeries were completely safe, avoiding damage in noble structures, and providing a better recovering of the patients.

  3. Effect of Etching Time and Preparation on Push-Out Bond Strength of Composite to Intracanal Dentin of Primary Anterior Teeth

    OpenAIRE

    Shahram Mosharrafian; Hossein Afshar; Maryam Farbod; Zahra Baniameri

    2016-01-01

    Objectives: This in-vitro study aimed to compare the push-out bond strength of composite to prepared and unprepared intracanal dentin using a 5th generation bonding agent in primary anterior teeth after etching for seven and 15 seconds.Materials and Methods: Sixty primary anterior teeth were randomly divided into four groups. In groups one and two, intracanal dentin remained intact while in groups three and four it was prepared using a #5 round bur and low-speed handpiece. Single Bond 2 was u...

  4. Comparison of the Remaining Tooth Structure and Fracture Resistance between Labial and Lingual Access Cavities in Permanent Anterior Teeth with Labial Caries: An In-vitro Study

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    Eftekhar B.

    2012-02-01

    Full Text Available Statement of Problem: Labial access cavity preparation is a conventional method in endodontic treatment of the anterior teeth, but in some conditions labial cavity preparation is recommended.Purpose: The aim of this study was to compare labial and lingual access cavity preparation in the permanent anterior teeth with labial caries in terms of the remaining tooth structure and fracture resistance. Materials and Method: In this experimental study, 150 intact permanent human anterior teeth were selected in 5 groups each with 30 teeth including the maxillary central, maxillary lateral, maxillary canine, mandibular incisors and mandibular canine. A class V cavity with similar ratios to dimensions of each tooth was prepared on the labial surface of all specimens. The volumes of each of these teeth were measured by Penta Pycnometer before and after class V cavity preparation (V1, V2. Each group was randomly divided into 2 equal subgroups (n=15. Access cavities were prepared labially in subgroup A and lingually in subgroup B; then, the remained volume of each tooth was measured again (V3. The mean proportional volume loss of each tooth was calculated through access preparation (V2-V3/V1. Then, the specimens were embedded in acrylic resin blocks and subjected to load with a universal testing machine.Results: The differences of mean of theremained volume and fracture resistance of the two subgroups were statistically significant in all groups ( p <0.05 and those teeth with labial access showed more remained volume and fracture resistance than lingual access. Conclusion: Labial access cavity preparation can enhance the remained volume and fracture resistance as compared to lingual access in endodontic treatment of the anterior teeth with labial caries especially in mandibular incisors.

  5. Esthetic rehabilitation of anterior primary teeth using polyethylene fiber with two different approaches

    Directory of Open Access Journals (Sweden)

    M Jain

    2011-01-01

    Full Text Available An acceptable treatment approach for early childhood caries in the past may not necessarily be the best treatment option for our young patients today. Technological advances in dental materials and the approach to their use need to be considered, and the introduction of new adhesive systems, restorative materials, and the approach toward treating these teeth has yielded convincing results. Two such clinical case reports where polyethylene fibers were used as intra-canal posts and to splint the pontic fabricated with polyethylene fibers reinforced composite are reported.

  6. Reconstruction of advanced bone defect associated with severely compromised maxillary anterior teeth in aggressive periodontitis: a case report.

    Science.gov (United States)

    Kamil, Wisam; Al Bayati, Lina; Hussin, Akbar S; Hassan, Haszelini

    2015-09-25

    Aggressive periodontitis is characterized by a rapid rate of attachment loss and bone resorption. Regenerative therapy offers reconstruction of the periodontium; however, certain advanced cases with a questionable prognosis might remain a challenge. We report a successful intervention outcome of a challenging case in the aesthetic zone of a patient with aggressive periodontitis. A 34-year-old systemically healthy Malay woman was referred to the Periodontics Specialist Clinic of the Kulliyyah of Dentistry, International Islamic University Malaysia, with a chief complaint of bleeding gums and mobility of the upper anterior teeth. A diagnosis of localized aggressive periodontitis was made. A thorough non-surgical periodontal treatment was provided, followed by a series of regenerative periodontal surgeries to manage advanced bone defects. A successful treatment outcome with a good prognosis was achieved. Maintenance through the supportive treatment phase showed marked bone gain. Teeth with severely compromised periodontium of unpredictable prognosis can still be maintained with satisfactory restoration of the function, support, and aesthetics, despite the baseline unpredicted treatment outcome. Proper selection of an advanced periodontal treatment plan can exclude the option of tooth extraction or prosthetic replacement.

  7. Age Estimation of Infants Through Metric Analysis of Developing Anterior Deciduous Teeth.

    Science.gov (United States)

    Viciano, Joan; De Luca, Stefano; Irurita, Javier; Alemán, Inmaculada

    2017-04-06

    This study provides regression equations for estimation of age of infants from the dimensions of their developing deciduous teeth. The sample comprises 97 individuals of known sex and age (62 boys, 35 girls), aged between 2 days and 1,081 days. The age-estimation equations were obtained for the sexes combined, as well as for each sex separately, thus including "sex" as an independent variable. The values of the correlations and determination coefficients obtained for each regression equation indicate good fits for most of the equations obtained. The "sex" factor was statistically significant when included as an independent variable in seven of the regression equations. However, the "sex" factor provided an advantage for age estimation in only three of the equations, compared to those that did not include "sex" as a factor. These data suggest that the ages of infants can be accurately estimated from measurements of their developing deciduous teeth. © 2017 American Academy of Forensic Sciences.

  8. Comparative photographic evaluation of various geometric and mathematical proportions of maxillary anterior teeth: A clinical study

    OpenAIRE

    Vineet S Agrawal; Sonali Kapoor; Dhvani Bhesania; Chintul Shah

    2016-01-01

    Aim: This study aimed to investigate the existence of the golden proportion, recurring esthetic dental (RED) proportion and golden percentage between the frontal view widths of the maxillary anterior natural dentition among students of Indian origin by the aid of digital photography. Materials and Methods: This study was conducted with 80 dental students (41 female and 39 male), with ages ranging from 20 to 23 years. Students whose natural smile did not develop any visual tension with reg...

  9. Class III Restoration of Anterior Primary Teeth: In Vitro Retention Comparison of Conventional, Modified and Air-abrasion Treated Preparations

    Directory of Open Access Journals (Sweden)

    Naser Asl Aminabadi

    2014-06-01

    Full Text Available Background and aims. Anterior esthetic restoration is challenging in pediatric dentistry, due to limited durability and poor retention of the restoration.This study assessed the effect of air abrasion on tensile failure load of composite class III restorations using different preparation techniques. Materials and methods. 100 extracted human anterior primary teeth were divided, based on the preparation methods, into four groups each consisting of 25 subjects : conventional (A, labial surface bevel (B, conventional + air abrasion (C, and labial surface bevel + air abrasion (D. After restoring cavities, tensile failure load of samples was measured in Newton by Universal testing machine at a crosshead speed of 1 mm per minute. The data were analyzed by Kruskal-Wallis and Mann Whitney U tests using SPSS software. Results. There were statistically significant differences between groups A and C (P = 0.003, groups A and B (P < 0.001, groups A and D (P < 0.001, groups B and C (P = 0.028, groups B and D (P = 0.027, and also groups C and D (P < 0.001. Group D demonstrated the highest mean tensile failure load. Conclusion. Labial surface bevel treated by air abrasion showed significantly more retention of composite restoration.

  10. Class III Restoration of Anterior Primary Teeth: In Vitro Retention Comparison of Conventional, Modified and Air-abrasion Treated Preparations.

    Science.gov (United States)

    Asl Aminabadi, Naser; Najafpour, Ebrahim; Erfanparast, Leila; Samiei, Mohammad; Haghifar, Monireh; Sighari Deljavan, Alireza; Jamali, Zahra; Pournaghi Azar, Fatemeh; Shokravi, Marzieh

    2014-01-01

    Background and aims. Anterior esthetic restoration is challenging in pediatric dentistry, due to limited durability and poor retention of the restoration.This study assessed the effect of air abrasion on tensile failure load of composite class III restorations using different preparation techniques. Materials and methods. 100 extracted human anterior primary teeth were divided, based on the preparation methods, into four groups each consisting of 25 subjects : conventional (A), labial surface bevel (B), conventional + air abrasion (C), and labial surface bevel + air abrasion (D). After restoring cavities, tensile failure load of samples was measured in Newton by Universal testing machine at a crosshead speed of 1 mm per minute. The data were analyzed by Kruskal-Wallis and Mann Whitney U tests using SPSS software. Results. There were statistically significant differences between groups A and C (P = 0.003), groups A and B (P & 0.001), groups A and D (P & 0.001), groups B and C (P = 0.028), groups B and D (P = 0.027), and also groups C and D (P& 0.001). Group D demonstrated the highest mean tensile failure load. Conclusion. Labial surface bevel treated by air abrasion showed significantly more retention of composite restoration.

  11. [Splinting of traumatized anterior teeth using the nylon-resin technic].

    Science.gov (United States)

    de la Teja Angeles, E; Martínez Morán, H

    1990-01-01

    In this paper the nylon-resin technique is proposed as the idoneous fixing technique of dentary displacement treatment and/or radicle fracture due to dentoalveolar traumatisms, of high incidence in children. In order to probe the effectiveness and advantages of this technique a comparative study against the wire-resin technique was done. The fixing time proposed for both procedures was 14 days. The techniques were applied in the same number of patients indistinctly in age, sex, affected teeth, and type of lesion. After evaluation we observed that the proposed technique is superior in several aspects: fulfils with the requirements of an ideal ferule, is aesthetic, easier to elaborate, more resistant, more compatible with tissues, and because of their semirigidity, more functional.

  12. Modified Whale's tail technique for the management of bone-defect in anterior teeth.

    Science.gov (United States)

    Kuriakose, Anu; Ambooken, Majo; Jacob, Jayan; John, Priya

    2015-01-01

    The purpose of this case report is to describe the efficacy of a modified Whale's tail technique to achieve primary closure and thereby aid in regeneration of an interdental osseous defect between maxillary central incisors complicated by an aberrant frenal attachment. A healthy 32-year-old female patient reported with the complaint of spacing between her upper front teeth. Clinical examination revealed an aberrant frenum extending into the interdental papilla in relation to the central incisors. There was a 6 mm periodontal pocket in relation to the mesiopalatal aspect of maxillary left central incisor. Intraoral periapical radiograph showed vertical bone loss in relation to mesial aspect of maxillary left central incisor. A modified Whale's tail flap was employed to access the area. The defect was filled with an alloplastic graft. Six months postoperative review showed complete elimination of the pocket along with radiographic bone fill of the defect.

  13. Management of rare case of lip tear and extrusion of anterior mandibular teeth

    Directory of Open Access Journals (Sweden)

    K M Sangeetha

    2015-01-01

    Full Text Available The occurrence of combined injury involving both extrusion and lower lip injury is extremely rare. A simple review of the medical literature shows that no article up to this date has reported the prevalence of the both the injuries in mandible. And an ideal treatment of this type of dental trauma is not well established. Hence, our objective is to relate several challenges that the professional might have to deal with. In this case report, extruded 41 was replanted after 6 h and lower lip tear crossing vermilion border and extending 2 mm involving skin. The repositioned extruded teeth did not demonstrate ankylosis, lower lip healed with minimum scar. Proper treatment planning and follow-up care can lead to a successful outcome.

  14. Size and placement of developing anterior teeth in immature Neanderthal mandibles from Dederiyeh Cave, Syria: implications for emergence of the modern human chin.

    Science.gov (United States)

    Fukase, Hitoshi; Kondo, Osamu; Ishida, Hajime

    2015-03-01

    Evolutionary and functional significance of the human chin has long been explored from various perspectives including masticatory biomechanics, speech, and anterior tooth size. Recent ontogenetic studies have indicated that the spatial position of internally forming anterior teeth partially constrains adult mandibular symphyseal morphology. The present study therefore preliminarily examined the size and placement of developing anterior teeth in immature Neanderthal mandibles of Dederiyeh 1 and 2, compared with similarly-aged modern humans (N = 16) and chimpanzees (N = 7) whose incisors are comparatively small and large among extant hominids, respectively. The Dederiyeh 1 mandible is described as slightly presenting a mental trigone and attendant mental fossa, whereas Dederiyeh 2 completely lacks such chin-associated configurations. Results showed that, despite symphyseal size being within the modern human range, both Dederiyeh mandibles accommodated overall larger anterior dentition and displayed a remarkably wide bicanine space compared to those of modern humans. Dederiyeh 2 had comparatively thicker deciduous incisor roots and more enlarged permanent incisor crypts than Dederiyeh 1, but both Dederiyeh individuals exhibited a total dental size mostly intermediate between modern humans and chimpanzees. These findings potentially imply that the large deciduous/permanent incisors collectively distended the labial alveolar bone, obscuring an incipient mental trigone. It is therefore hypothesized that the appearance of chin-associated features, particularly of the mental trigone and fossa, can be accounted for partly by developmental relationships between the sizes of the available mandibular space and anterior teeth. This hypothesis must be, however, further addressed with more referential samples in future studies.

  15. Evaluation of Novel Glass Fiber-reinforced Composite Technique for Primary Anterior Teeth with Deep Carious Lesions: A 12-month Clinical Study.

    Science.gov (United States)

    Sawant, Ajinkya; Chunawalla, Yusuf; Morawala, Abdul; S Kanchan, Nupur; Jain, Kapil; Talathi, Rohan

    2017-01-01

    Early childhood caries discloses a distinct clinical pattern, and the teeth most often involved are the maxillary central incisors, lateral incisors, and the maxillary and man-dibular first molars. The maxillary incisors are most severely affected, with deep carious lesions usually involving the pulp. Teeth that have been endodontically treated often have little coronal tooth tissue remaining and as such require a post to retain the core and restoration .This study evaluated and compared the efficacy of EverStick glass fiber-reinforced composite post with ParaPost Taper Lux in primary maxillary anterior teeth. An in vivo study was conducted to evaluate and compare the longevity and failures of two fiber post systems in primary maxillary anterior teeth. A total of 60 severely mutilated primary maxillary anterior teeth from children aged 3 to 5 years were selected according to the inclusion criteria. These teeth were treated endodontically and were randomly assigned into two groups with 30 samples in each group, group I: EverStick glass fiber-reinforced composite post, group II: ParaPost Taper Lux post. The evaluation of dislodgment of posts, secondary caries, root fracture, and post fracture was carried out clinically and radiographically during every follow-up at 3, 6, 9, and 12 months interval. Statistical tests (Chi-square test, Fisher's exact probability test) suggested that dislodgment of the posts was significant between the two groups at 6, 9, and 12 months follow-ups. But within the group during subsequent follow-up intervals, dislodgment of posts as a mode of failure was not statistically significant. However, clinically failures were seen in both the study groups. Fiber post system has proved to be successful clinically in both primary and permanent teeth due to the mono-block effect with luting agent, post system, core material, and bonding to dentin. Thus, today the EverStick glass fiber post system provides a novel way of fabricating cost-effective and

  16. The Importance of the Lifelike Esthetic Appearance of All-Ceramic Restorations on Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Daniela Micheline dos Santos

    2015-01-01

    Full Text Available The success of rehabilitation will not depend on just clinical procedures. A proper dental technique (ceramist is required as well as the respect for some biomimetic principles to obtain the desired final result. This study has the purpose of describing a prosthetic rehabilitation with laminate veneers and all-ceramic crowns of a patient unsatisfied with a previous esthetic treatment because of the negligence of some biomimetic principles. A 45-year-old female patient was admitted to the dental clinic complaining about the lifelike appearance of her all-ceramic restorations. Before the fabrication of new restorations, a mock-up was conducted to verify the patient’s satisfaction. A ceramist conducted all the fabrication process so that surface characterizations could be visually verified and the lifelike appearance of natural tooth could be reproduced. After the cementation procedure, the patient reported being satisfied with the lifelike appearance of the new restorations. Based on the clinical findings of the present case report, it can be concluded that the reproduction of the lifelike esthetic appearance of natural teeth and the visualization of the final results before definitive procedures are essential to obtain the clinical success.

  17. In vitro Comparative Evaluation of Various Restorative Materials used for restoring Class III Cavities in Deciduous Anterior Teeth: A Clinical Study.

    Science.gov (United States)

    Priyank, Harsh; Verma, Ankita; Gupta, Komal; Chaudhary, Esha; Khandelwal, Deepak; Nihalani, Shweta

    2016-12-01

    Beauty standards in today's modernized world scenario are formed by well-aligned and well-designed bright white teeth. One of the major reasons behind patients reporting to dental clinics is pain. Caries in the anterior primary teeth forms one of the major concerns from a restorative point of view. Very few studies are quoted in literature which stresses on the follow-up of anterior restorations in primary teeth. Hence, we evaluated and compared the efficacy of composite resin and resin-modified glass ionomer cement (RGIC) for class III restorations in primary anterior teeth. The present study was conducted in the pediatric dental wing and included a total of 80 patients aged 3 to 5½ years who reported with the chief complaint of carious lesions in the primary anterior teeth. Patients having minimal of a pair of similar appearing small carious lesions on the same proximal surfaces of the deciduous maxillary incisors were included for the study. All the patients were randomly divided into two groups: One in which RGIC restoration was done and other in which composite restoration was done. Cavity preparation was done and filling of the cavity with the restorative materials was carried out. Assessment of the restorations was done at 4, 8, and 12 months time following criteria given by Ryge et al. All the results were analyzed by Statistical Package for the Social Sciences (SPSS) software. Mann-Whitney test and one-way analysis of variance (ANOVA) were used to evaluate the level of significance; p value less than 0.05 was considered as significant. For composite and RGIC restorations, the mean score for anatomic shape was 1.21 and 1.10 respectively. While comparing the clinical parameters, nonsignificant results were obtained between composite and RGIC restorative materials at 4-, 8-, and 12-month interval. On comparing the clinical parameters for individual restorative materials at different time intervals, statistically significant results were obtained only for

  18. 上颌前牙埋伏阻生的临床矫治%Clinical study on impacted maxil ary anterior teeth by orthodontic treatment

    Institute of Scientific and Technical Information of China (English)

    乔义强

    2014-01-01

    目的:探讨上颌埋伏阻生前牙的临床治疗效果及相关因素分析。方法:对28例39颗上颌前牙埋伏阻生病例,应用牙槽外科开窗术,以及正畸牵引对埋伏牙进行治疗。结果:39颗阻生牙矫治后牙髓活力正常,3例埋伏牙牙根轻度吸收,5例邻牙牙根吸收轻度,牙周组织基本正常,两例牙龈形态出现轻度异常。牵引成功率100%。结论:正畸治疗结合牙槽外科开窗术导萌埋伏阻生牙,可有效保存上颌埋伏阻生前牙。%Objective:To evaluate the results of treating anterior impacted teeth of maxil ary by orthodontic treatment.Method:28 cases with 39 tooth of impacted maxil ary anterior teeth were treated with orthodontic treatment with surgical exposure. Result:When the treatment completed,the tooth pulp vitality of impacted teeth were normal,3 tooth and the 5 adjacent tooth of inpacte teeth had root resorption,periodontal tissues of impacted teeth were normal,only one has light unnormal morphological of gingiva .Conclusion:The impacted maxil ary anterior teeth can be treated by orthodontic treatment with surgical exposure.

  19. Choosing a pre-adjusted orthodontic appliance prescription for anterior teeth.

    Science.gov (United States)

    Thickett, Eleanor; Taylor, Nigel G; Hodge, Trevor

    2007-06-01

    A common orthodontic task is to correct anterior tooth position using brackets whose torque, tip and in-out are pre-adjusted. Bracket prescription greatly influences final aesthetics and function. Pre-adjusted orthodontic brackets have in-built prescriptions of torque, tip and in-out which are optimized for average cases. Refinement of tooth position can be achieved by archwire adjustment or archwire auxiliaries. Modifications to bracket position such as inversion can also help achieve individual tooth movements. Planning bracket position must be considered at the outset of treatment to achieve the maximum benefit. A number of clinical scenarios will be discussed including: a Class II division 1 malocclusion with lateral incisors palatally displaced, and another case with absent lateral incisors for space closure. Also, Class III malocclusions with consideration given to: canine angulation; a palatally displaced canine requiring labial movement; absent upper central incisors (space closure), and finally, a Class III case where incisor inclination requires consideration. By using a typodont to illustrate some of the points, this article aims to (1) show how three pre-adjusted orthodontic bracket systems (Andrews, Roth and MBT) vary significantly in their ability to influence tooth position and appearance; (2) inform clinicians how modified bracket position can influence tooth position.

  20. A RARE CASE OF A MALPOSITIONED CENTRAL VENOUS CATHE TER

    Directory of Open Access Journals (Sweden)

    Rasquinha Vinay

    2012-12-01

    Full Text Available ABSTRACT: A Malpositioned Central Venous Catheter is a common but serious complication of central line placement 1-2 .However malpositioning into the contralateral subc lavian is extremely unusual. The authors describe a case in which a cat heter is inserted via a right sided infraclavicular approach and malpositions itself into the contralateral subclavian vein.

  1. Comparative in vivo evaluation of restoring severely mutilated primary anterior teeth with biological post and crown preparation and reinforced composite restoration

    OpenAIRE

    Grewal N; Seth R

    2008-01-01

    Background: This study was designed to compare the success rate of biological and composite restorations when used to replace structural loss of primary anterior teeth using intracanal post for radicular support of the restoration. Materials and Methods: Forty-two patients aged between 3-5 years presenting with early childhood caries (ECC) received at least one or more composite and biological restorations for comparative evaluation. A total of 150 restorations were done (75 biological re...

  2. Effect of Etching Time and Preparation on Push-Out Bond Strength of Composite to Intracanal Dentin of Primary Anterior Teeth

    Science.gov (United States)

    Mosharrafian, Shahram; Afshar, Hossein; Farbod, Maryam; Baniameri, Zahra

    2016-01-01

    Objectives: This in-vitro study aimed to compare the push-out bond strength of composite to prepared and unprepared intracanal dentin using a 5th generation bonding agent in primary anterior teeth after etching for seven and 15 seconds. Materials and Methods: Sixty primary anterior teeth were randomly divided into four groups. In groups one and two, intracanal dentin remained intact while in groups three and four it was prepared using a #5 round bur and low-speed handpiece. Single Bond 2 was used in groups one and three after 15 seconds and in groups two and four after seven seconds of etching with phosphoric acid. After restoring with composite resin and incubation, the specimens were subjected to push-out bond strength test. Data were analyzed using two-way ANOVA and Kaplan Meier curves. Results: The mean bond strength was not significantly different between seven and 15 seconds etching times (P=0.198). Dentin preparation had no significant effect on the mean bond strength (P=0.838). The interaction effect of etching time and dentin preparation was not significant either (P=0.680). Conclusions: Decreasing the etching time from 15 to seven seconds and preparation of intracanal dentin had no significant effect on push-out bond strength of composite to intracanal dentin of primary anterior teeth. PMID:28127329

  3. Effect of Etching Time and Preparation on Push-Out Bond Strength of Composite to Intracanal Dentin of Primary Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Shahram Mosharrafian

    2016-12-01

    Full Text Available Objectives: This in-vitro study aimed to compare the push-out bond strength of composite to prepared and unprepared intracanal dentin using a 5th generation bonding agent in primary anterior teeth after etching for seven and 15 seconds.Materials and Methods: Sixty primary anterior teeth were randomly divided into four groups. In groups one and two, intracanal dentin remained intact while in groups three and four it was prepared using a #5 round bur and low-speed handpiece. Single Bond 2 was used in groups one and three after 15 seconds and in groups two and four after seven seconds of etching with phosphoric acid. After restoring with composite resin and incubation, the specimens were subjected to push-out bond strength test. Data were analyzed using two-way ANOVA and Kaplan Meier curves.Results: The mean bond strength was not significantly different between seven and 15 seconds etching times (P=0.198. Dentin preparation had no significant effect on the mean bond strength (P=0.838. The interaction effect of etching time and dentin preparation was not significant either (P=0.680.Conclusions: Decreasing the etching time from 15 to seven seconds and preparation of intracanal dentin had no significant effect on push-out bond strength of composite to intracanal dentin of primary anterior teeth. Keywords: Dental Etching; Composite Resins; Dentin; Tooth, Deciduous

  4. ESTHETICS IN PRIMARY TEETH

    National Research Council Canada - National Science Library

    Mathew Renu Ann

    2013-01-01

    .... Esthetic restoration of primary anterior teeth can be especially challenging due to the small size of the teeth, close proximity of pulp to tooth surface, relatively thin enamel and surface area...

  5. Impact of aesthetic restorative treatment on anterior teeth with fluorosis among residents of an endemic area in Brazil: intervention study

    Science.gov (United States)

    2014-01-01

    Background Endemic dental fluorosis has already been described in some regions of the world. The aim of this study was to evaluate the functional and psychosocial impact of direct aesthetic restorative treatments in endemic fluorosis patients in the northern state of Minas Gerais, Brazil. Was a quasi-experimental intervention study. Methods The reference population consisted of individuals between 9 and 27 years of age that were served by a project intended to recover the smiles of patients with severe fluorosis. The questionnaires were administered on two occasions, 24 months apart (before and after dental treatment). Initially, descriptive analyses were conducted. Prevalence and severity, as well as the extent of the functional and psychosocial impact of oral disorders were estimated based on the Oral Health Impact Profile instrument (OHIP-14). Comparisons between baseline and follow-up and between treatment techniques were carried out using the McNemar, Wilcoxon, and Mann–Whitney tests. Results The study involved 53 individuals, with a mean age of 15.9 years, treated with microabrasion, dental composite, or a combination of both techniques. The treatments performed proved to be competent for reducing the functional and psychosocial impact of oral disorders as measured by the OHIP-14, pointing to the possibility of establishing protocols to be used in programs aimed at restoring the aesthetics and functionality of the anterior teeth in large populations. Conclusions After performing the direct aesthetic restorative treatments in patients with endemic fluorosis, a significant improvement was observed in the prevalence and severity, as well as the extent of the functional and psychosocial impact of oral disorders. PMID:24886223

  6. Aesthetic repair of adult upper anterior teeth by metal-porcelain crown%成人上前牙烤瓷的美容修复

    Institute of Scientific and Technical Information of China (English)

    杨巨莉; 王雁冰; 白艳杰

    2011-01-01

    目的 探讨采用烤瓷熔附金属全冠修复上前牙错(牙合)的方法及美容效果.方法 采用烤瓷熔附金属全冠、桩核冠或桥体,对78例(164颗)上前牙错(牙合)畸形患者在短时间内完成修复治疗.用制作的烤瓷牙冠修复前牙,调整颜色、形态,使其与邻近的前牙排齐,达到美容效果.结果 所有患者获随访1~6年,其中2例(2颗)出现崩瓷,1例(1颗)为桩核冠脱落,1例(2颗)为单冠脱落,2例(2颗)根折;72例患者的前牙烤瓷冠无崩瓷、松动及脱落,其颜色自然,形态美观,功能正常.结论 采用烤瓷熔附金属全冠修复成人上前牙错(牙合)治疗的方法,具有修复时间短,形态逼真,改善美观,恢复咀嚼功能的良好效果,适合在基层医院推广应用.%Objective To explore the method and aesthetic outcome of the metal-porcelain crown for the repair of adult upper anterior teeth. Methods Totally 78 patients ( 164 teeth ) with malocclusion were treated by porcelain fused to metal crown, core crown and pontic which cost a short time. After the porcelain crowns placed, their color and profile of the repaired upper anterior teeth were adjusted according to the adjacent ones to reach the aesthetic outcome. Results After 1 to 6 years follow-up, 72 cases got satisfactory results with nature color. nice contour and normal function without crown craze or loosen, except for 2 cases ( 2 teeth ) with crowns crack. 1 case ( 1 tooth ) with porcelain-fused prosthesis fallen off, 1 case ( 2 teeth ) with single crown fallen off and 2 cases ( 2 teeth ) with root fracture. Conclusion It is an easy and effective method of metalporcelain crown for the repair of adult upper anterior teeth of malocclusion with such advantages as short operating time, nice postoperative contour and normal masticatory function. It worth spreading in clinic.

  7. Survival of Composite Resin Restorations of severely Decayed Primary Anterior Teeth retained by Glass Fiber Posts or Reversed-orientated Metal Posts

    Science.gov (United States)

    Ranjkesh, Bahram; Lovschall, Henrik; Erfanparast, Leila; Jafarabadi, Mohammad A; Oskouei, Sina Ghertasi; Isidor, Flemming

    2016-01-01

    ABSTRACT Aim: The aim of this study was to compare the survival of composite resin restorations retained by glass fiber posts or reversed-orientated (upside-down) metal posts in severely decayed primary anterior teeth after 6, 12, and 18 months. Materials and methods: A total of forty-four 3- to 5-year-old children with bilateral severely decayed primary maxillary canines were included. Patients were treated under general anesthesia. After pulpectomy, an intracanal post was seated in the primary maxillary canine on each side: either a glass fiber post or a metallic post in reversed orientation and teeth restored with light-cured composite. Survival rate of each technique was evaluated at predetermined follow-ups and data were analyzed with McNemar’s test (α = 0.05). Results: The difference in survival of restorations retained by two types of posts was not statistically significant in clinical and radiographical evaluations after 6, 12, and 18 months. The survival rate of reversed-orientated metal and glass fiber posts after 18 months was 81.1 and 67.6% respectively (p = 0.14). Conclusion: Reversed-orientated metal post did not show lower clinical survival compared with glass fiber posts in 18-month follow-up. Hence, reversed-orientated metal post can be considered as a potential method to obtain retention for composite restorations in severely decayed primary anterior teeth. How to cite this article: Vafaei A, Ranjkesh B, L0vschall H, Erfanparast L, Jafarabadi MA, Oskouei SG, Isidor F. Survival of Composite Resin Restorations of severely Decayed Primary Anterior Teeth retained by Glass Fiber Posts or Reversed-orientated Metal Posts. Int J Clin Pediatr Dent 2016;9(2):109-113. PMID:27365929

  8. 上颌埋伏阻生前牙正畸治疗的临床研究%Clinical study on impacted upper anterior teeth by orthodontic treatment.

    Institute of Scientific and Technical Information of China (English)

    陈晓明; 唐瞻贵; 刘友良; 全宏志; 赵丽莉; 曾碧映

    2011-01-01

    目的:观察上颌埋伏阻生前牙应用固定正畸方法进行矫治的临床疗效,探讨埋伏阻生前牙有效的治疗方法.方法:对49例58颗上颌前牙埋伏阻生病例,应用固定正畸进行矫治,结合牙槽外科开窗术,对埋伏牙进行牵引.其中20颗进行开拓间隙使之自然萌出,38颗进行开窗封闭式牵引导萌矫治.结果:55颗阻生牙矫治后牙髓活力正常、未见埋伏牙及邻牙牙根吸收、牙周组织正常.开窗封闭式牵引导萌有3颗牙治疗失败,总体成功率94.8%.结论:应用固定正畸技术开拓间隙或结合牙槽外科开窗术导萌埋伏阻生牙,可有效保存上颌埋伏阻生前牙.%Objective: To evaluate the results of treating anterior impacted teeth by fixed orthodontic treatment.Method: 49 cases of impacted upper anterior teeth were treated with fixed orthodontic treatment, with or without fenestration.20 cases just by open space and erupted by themselves, 29cases were pulled in the bone.Result: When the treatment completed, the tooth pulp vitality of impacted teeth were normal, no inpacte teeth or adjacent tooth had root resorption, and the periodontal tissues of impacted teeth were normal.Conclusion: The impacted upper anterior teeth can be treated by fixed orthodontic treatment, with or without fenestration.

  9. Central Venous Catheter Intravascular Malpositioning: Causes, Prevention, Diagnosis, and Correction.

    Science.gov (United States)

    Roldan, Carlos J; Paniagua, Linda

    2015-09-01

    Despite the level of skill of the operator and the use of ultrasound guidance, central venous catheter (CVC) placement can result in CVC malpositioning, an unintended placement of the catheter tip in an inadequate vessel. CVC malpositioning is not a complication of central line insertion; however, undiagnosed CVC malpositioning can be associated with significant morbidity and mortality. The objectives of this review were to describe factors associated with intravascular malpositioning of CVCs inserted via the neck and chest and to offer ways of preventing, identifying, and correcting such malpositioning. A literature search of PubMed, Cochrane Library, and MD Consult was performed in June 2014. By searching for "Central line malposition" and then for "Central venous catheters intravascular malposition," we found 178 articles written in English. Of those, we found that 39 were relevant to our objectives and included them in our review. According to those articles, intravascular CVC malpositioning is associated with the presence of congenital and acquired anatomical variants, catheter insertion in left thoracic venous system, inappropriate bevel orientation upon needle insertion, and patient's body habitus variants. Although plain chest radiography is the standard imaging modality for confirming catheter tip location, signs and symptoms of CVC malpositioning even in presence of normal or inconclusive conventional radiography findings should prompt the use of additional diagnostic methods to confirm or rule out CVC malpositioning. With very few exceptions, the recommendation in cases of intravascular CVC malpositioning is to remove and relocate the catheter. Knowing the mechanisms of CVC malpositioning and how to prevent, identify, and correct CVC malpositioning could decrease harm to patients with this condition.

  10. The interaction between reaction forces and stabilization systems during intrusion of the anterior teeth and its effect on the posterior unit.

    Science.gov (United States)

    Van den Bulcke, M M; Dermaut, L R

    1990-11-01

    The aim of this research is to attain a better understanding of the initial reaction forces induced by an intrusion mechanism (acting on the anterior teeth) on the posterior unit and to examine how these forces can be neutralized. The experiments were performed on the dentition of a dry human skull and initial tooth displacements were registered by means of two laser measuring techniques, namely holographic interferometry and the laser reflection technique. It was established that of all reaction forces induced by the intrusion arch, distal tipping of the first molars is the most pronounced. A transpalatal bar connecting the teeth does not counteract this movement. The stabilization of the posterior unit with a transpalatal bar, buccal sectionals, and high-pull headgear proved to be the most effective technique.

  11. [Advantages of a double approach to upper blepharoplasty associated with eyelid malpositions].

    Science.gov (United States)

    Morax, S; Ben Ayed, H; Pereira-Nunes, T; Hamedani, M

    2003-11-01

    During upper blepharoplasty, myocutaneous excess and fat pads are treated using an anterior approach. Eyelid malpositions such as involutional ptosis or lid retraction could be associated and should be treated with associated procedures. Aponeurotic surgery on the levator muscle can make use of the same anterior approach, with the major difficulty of dosage. In cases of ptosis with a positive epinephrine test or minor muscular retraction, the Müller muscle-conjunctival surgery via a posterior approach seems to be more reproducible. Double-approach techniques are described.

  12. Central Venous Catheter Intravascular Malpositioning: Causes, Prevention, Diagnosis, and Correction

    Directory of Open Access Journals (Sweden)

    Carlos J. Roldan

    2015-10-01

    Full Text Available Despite the level of skill of the operator and the use of ultrasound guidance, central venous catheter (CVC placement can result in CVC malpositioning, an unintended placement of the catheter tip in an inadequate vessel. CVC malpositioning is not a complication of central line insertion; however, undiagnosed CVC malpositioning can be associated with significant morbidity and mortality. The objectives of this review were to describe factors associated with intravascular malpositioning of CVCs inserted via the neck and chest and to offer ways of preventing, identifying, and correcting such malpositioning. A literature search of PubMed, Cochrane Library, and MD Consult was performed in June 2014. By searching for “Central line malposition” and then for “Central venous catheters intravascular malposition,” we found 178 articles written in English. Of those, we found that 39 were relevant to our objectives and included them in our review. According to those articles, intravascular CVC malpositioning is associated with the presence of congenital and acquired anatomical variants, catheter insertion in left thoracic venous system, inappropriate bevel orientation upon needle insertion, and patient’s body habitus variants. Although plain chest radiography is the standard imaging modality for confirming catheter tip location, signs and symptoms of CVC malpositioning even in presence of normal or inconclusive conventional radiography findings should prompt the use of additional diagnostic methods to confirm or rule out CVC malpositioning. With very few exceptions, the recommendation in cases of intravascular CVC malpositioning is to remove and relocate the catheter. Knowing the mechanisms of CVC malpositioning and how to prevent, identify, and correct CVC malpositioning could decrease harm to patients with this condition.

  13. Displacement and force distribution of splinted and tilted mandibular anterior teeth under occlusal loads: an in silico 3D finite element analysis

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    Allahyar Gerami

    2016-06-01

    Full Text Available Abstract Background Fixed orthodontic retainers have numerous advantages, but it is not known whether they can exert pathological forces on supporting tissues around the splinted teeth. The purpose of this study was to investigate how the inclination of the lower anterior teeth can affect dental displacement and also change the direction of occlusal loads exerted to dental and its supporting tissues. Methods Four three-dimensional finite element models of the anterior part of the mandible were designed. All the models contained the incisors and canines, their periodontal ligament layers (PDLs, the supporting bone (both spongy and cortical, and a pentaflex splinting wire placed in the lingual side of the teeth. Teeth inclination was considered to be 80° (model 1, 90° (model 2, 100° (model 3, and 110° (model 4 to the horizontal plane. The lower incisors were loaded with a 187-N vertical force. Their displacement patterns and the stress in their PDLs were evaluated. Results In incisors with 80° of inclination, less than a 0.1-mm lingual displacement was seen on the incisal edge and a similar distance of displacement towards the labial was seen on their root apices. However, in models with 90°–110° of inclination, the incisal edge displaced labially between about 0.01 and 0.45 mm, while root apices displaced lingually instead. By increasing the angle of the teeth, the strain in the periodontal ligament increased from about 37 to 58 mJ. The von Mises stresses around the cervical and apical areas differed for each tooth and each model, without a similar pattern. Increasing the angle of the teeth resulted in much higher cervical stresses in the incisors, but not in the canines. In the lateral incisor, cervical stress increased until 100° of inclination but reduced to about half by increasing the angle to 110°. Apical stress increased rather consistently in the incisor and lateral incisors, by increasing the inclination. However, in the

  14. MALPOSITIONED LMA CONFUSED AS FOREIGN BODY IN NASAL CAVITY.

    Science.gov (United States)

    Verma, Sidharth; Mehta, Nitika; Mehta, Nandita; Mehta, Satish; Verma, Jayeeta

    2015-10-01

    We present a case of confusing white foreign body in the nasal cavity detected during Endoscopic Sinus Surgery (ESS) in a 35-yr-old male which turned out to be a malposition of classic laryngeal mask airway (LMA). Although malposition of LMA is a known entity to the anesthesiologist, if ventilation is adequate, back folded LMA in nasal cavity might not be recognized by the surgeon and lead to catastrophic consequences during endoscopic sinus surgery. In principle, misfolding and malpositioning can be reduced by pre usage testing, using appropriate sizes, minimizing cuff volume, and early identification and correction of malposition.

  15. Malposition of catheters during voiding cystourethrography

    Energy Technology Data Exchange (ETDEWEB)

    Rathaus, V.; Konen, O.; Shapiro, M. [Dept. of Diagnostic Imaging Sapir Medical Center, Kfar-Saba and Sackler Medical School, Tel Aviv University (Israel); Grunebaum, M. [Veteran Pediatric Radiologist, Kfar Saba (Israel)

    2001-04-01

    The aim of this study was to report catheter malposition during voiding cystourethrography. Eight hundred forty-three voiding cystourethrography (265 males and 578 females, aged 1 week to 12 years, mean age 2 years) were performed during a period of 4 years. The conventional standard procedure was applied. In 3 cases with passed history of urinary tract infection the catheter entered directly into the ureter. In all these cases the uretero-vesical reflux was present on the same side where the catheter entered. It appears that insertion of a catheter into the ureter is possible only in the presence of an anomaly or pathology at the vesicoureteric junction. (orig.)

  16. Direct or indirect composite veneers in anterior teeth: which method causes higher tooth mass loss? An in vitro study.

    Science.gov (United States)

    Machado, Alessandra Nunes; Coelho-de-Souza, Fabio Herrmann; Rolla, Juliana Nunes; Erhardt, Maria Carolina Guilherme; Demarco, Flavio Fernando

    2014-01-01

    There is little information in the literature regarding the relationship between preparations made for direct and indirect veneers and the loss of tooth structure required for each technique. This in vitro study sought to quantify the different mass losses from preparation techniques used for direct and indirect veneers. Thirty artificial teeth were weighted using a digital balance and placed in a dental manikin in the position corresponding to the right maxillary central incisor. Five clinicians-all experts in esthetic dentistry-were asked to perform conventional preparations for both a direct composite resin veneer and an indirect ceramic veneer. After preparations, specimens were weighted again in the same digital balance. Teeth undergoing veneer preparations demonstrated a statistically significant mass loss compared to unprepared teeth. Indirect ceramic veneer preparations produced more mass loss than direct composite veneer preparations (P < 0.01).

  17. A comparative study to find out the relationship between the inner inter-canthal distance, interpupillary distance, inter-commissural width, inter-alar width, and the width of maxillary anterior teeth in Aryans and Mongoloids

    Science.gov (United States)

    Mishra, Meena Kumari; Singh, Raj Kumar; Suwal, Pramita; Parajuli, Prakash Kumar; Shrestha, Pragya; Baral, Dharanidhar

    2016-01-01

    Background One of the most confusing and difficult aspects of complete denture prosthodontics is the selection of appropriately sized maxillary anterior denture teeth. Various guidelines have been suggested for determining the size of anterior teeth, but different opinions have been reported regarding their significance. In the study reported here, the relationships between facial measurements and the width of maxillary anterior teeth in two ethnic groups, namely Aryans and Mongoloids, were determined. Objective The aims of the study were to determine the inner inter-canthal distance (ICAD), inter-pupillary distance (IPD), inter-commissural width (ICOW), inter-alar width (IAW), and the combined width of maxillary anterior teeth (CW) in Aryans and Mongoloids and to determine the relationships between these measurements. Materials and methods Impressions of the teeth of 170 dentulous subjects (85 males and 85 females) were made with alginate then Type IV gypsum product was poured in. Measurements of the cast maxillary anterior teeth at their widest dimension (contact areas) were made with the Boley gauge. ICAD, IPD, ICOW, and IAW distances were also measured with a Boley gauge. Results For all 170 subjects, 85 Aryans and 85 Mongoloids, Pearson’s correlation coefficient (r) for IAW, IPD, ICOW, ICAD, and CW was calculated. In Aryans, highly significant (P<0.001) but weak correlations were found between CW and IAW, IPD, and ICOW. In Mongoloids, a highly significant (P<0.001) and weak correlation was found only between CW and IPD. Conclusion Within the limitations of this study, the results suggest that the IAW, IPD, and ICOW for Aryans and IPD for Mongoloids can be used as a preliminary method for determining the width of the maxillary anterior teeth in edentulous patients. PMID:26955292

  18. Evaluation of threshold response and appropriate electrode placement site for electric pulp testing in fluorosed anterior teeth: An in vivo study

    Science.gov (United States)

    Vemisetty, Harikumar; Vanapatla, Amulya; Ravichandra, Polavarapu Venkata; Reddy, Surakanti Jayaprada; Punna, Rajani; Chandragiri, Srujana

    2016-01-01

    Background: Accurate diagnosis is key to success. Diagnosing the pulpal status in varied clinical situations poses a challenge to the clinician. Electric pulp test (EPT) is one of the valuable attempts in evaluating the sensibility of pulp tissue. The aim of this study was to find out and compare the threshold levels and optimal electrode placement site for EPT in fluorosed and nonfluorosed anterior teeth. Materials and Methodology: Eighty volunteers recruited for this study were divided into two groups based on the incidence of dental fluorosis. Electric pulp testing was done on either of the central incisors in fluorosed and nonfluorosed group. Four sites on each crown were tested 4 times with digitest electric pulp tester, and the mean of the threshold responses was recorded. The data were analyzed with SPSS, version 11. Means of variables from each location were compared using one-way ANOVA and Tukey's post-hoc test while the critical level of significance was set at P 0.05). Conclusion: Within the limitations of this study, it can be concluded that fluorosed teeth respond to higher threshold levels than the non-fluorosed teeth, and incisal edge was the optimal electrode placement site. PMID:27274345

  19. Comparison of Push-Out Bond Strength of Two Bulk-Fill and One Conventional Composite to Intracanal Dentin in Severely Damaged Primary Anterior Teeth

    Directory of Open Access Journals (Sweden)

    Shahram Mosharrafian

    2016-10-01

    Full Text Available Objectives: This study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth.Materials and Methods: This in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. After cleaning and shaping, the root canals were filled with Metapex in such a way that after the application of 1mm light-cure liner on top of it, the coronal 3mm of the canal remained empty for composite post space. Z250 conventional composite was used in group 1 and SonicFill and Filtek bulk-fill composites along with Single Bond 2 were used in groups 2 and 3, respectively. The samples were subjected to thermocycling. One-millimeter thick sections were made of the mid-root and subjected to push-out bond strength test. Mode of failure was determined under a stereomicroscope at ×25 magnification. The data were analyzed using one-way ANOVA.Results: The mean (±standard deviation push-out bond strength was 11.40±4.23MPa, 10.94±6.69MPa and 8.79±4.12MPa in the conventional, SonicFill and Filtek groups, respectively. The difference in this regard among the three groups was not statistically significant (P=0.397.Conclusions: Based on the results, bulk-fill composites, similar to conventional types, can be successfully used for the fabrication of composite intracanal posts in primary teeth to decrease the treatment time in children.Keywords: Composite Resins; Dentin; Tooth, Deciduous

  20. The Clinical Application of Vacuum Die Holder in the Treatment of Anterior Teeth Injury in Children%真空压模牙托在儿童前牙外伤治疗的临床应用

    Institute of Scientific and Technical Information of China (English)

    阿孜古丽·阿不都热依木

    2015-01-01

    Objective To investigate the effect of vacuum die denture in children in the treatment of traumatic anterior teeth. Methods 24 cases of traumatic anterior teeth in children patients with proven dental trauma after were chosen in our hospital, vacuum pressure die tooth supporting teeth fixed and treatment. Results 24 cases were fixed by 1 to 3 months after the injury of anterior teeth are solid, cutting function returned to normal. Conclusion Vacuum pressure die dental care in the treatment of children with traumatic anterior teeth fixed effect is good.%目的:探讨真空压模牙托在儿童前牙外伤中的治疗效果。方法选取我院治疗的24例前牙外伤患儿,探明牙外伤的情况后,用真空压模牙托来进行牙齿的固定和治疗。结果24例患儿经固定1~3个月后损伤前牙均已稳固,恢复正常的切割功能。结论真空压模牙托在治疗儿童前牙外伤中的固定作用效果良好。

  1. 全瓷牙用于前牙美容修复的临床疗效分析%Porcelain Teeth for Cosmetic Restoration of Anterior Teeth Clinical Analysis

    Institute of Scientific and Technical Information of China (English)

    徐命松

    2013-01-01

      目的:观察分析使用全瓷牙做前牙美容修复的临床治疗效果。方法:从笔者所在医院接诊要求前牙美容修复的患者中抽取60例,随机分为观察组与对照组,观察组患者使用全瓷牙修复,对照组患者使用金属合金烤瓷冠修复,对比观察两组患者的修复效果。结果:观察组患者美学效果满意度在整体美观、面容改善、修复体色泽及外形、心理改善等方面明显高于对照组,牙龈炎、牙周炎发病率均为3.33%,明显低于对照组牙龈炎发病率43.33%与牙周炎发病率36.67%,差异有统计学意义(P<0.05)。结论:使用全瓷牙进行前牙的美容修复,能够达到更为理想的美学效果,且对周围组织刺激较小,使用安全可靠,具有在临床进一步推广应用的价值。%Objective:Observe the clinical effect analysis using all porcelain teeth for cosmetic restoration of anterior teeth.Methods:From my hospital admissions of patients require cosmetic restoration of anterior teeth extracted 60 cases were randomly divided into observation group and the control group,the observation group were using all-ceramic dental restoration,control group patients with metal alloy porcelain crown,contrast observed in both groups patients with repair effect.Results:Aesthetic effect in patients with satisfaction of the observation group was significantly higher in terms of overall appearance,face to improve and repair the body color and shape,psychological improvement,Gingivitis,periodontitis incidence rates are 3.33%.Gingivitis was significantly lower than the control group the incidence of 43.33%with periodontitis incidence of 36.67%.The difference was statistically significant(P<0.05).Conclusion:All-ceramic dental cosmetic restoration of anterior teeth to achieve a more desirable aesthetic effect and smaller surrounding tissue stimulation,the use of safe and reliable,to further promote the application in the clinical

  2. The Role of Mandibular Third Molars on Lower Anterior Teeth Crowding and Relapse after Orthodontic Treatment: A Systematic Review

    Directory of Open Access Journals (Sweden)

    Khalid H. Zawawi

    2014-01-01

    Full Text Available Aims. To evaluate the role of third molars in the development of crowding or relapse after orthodontic treatment in the anterior segment of the dental arch. Methods. PubMed search of the literature was performed selecting all the articles relevant to the topic and limiting the studies to controlled trials on humans and written in English language. Systematic review was conducted according to the PRISMA (preferred reporting items for systematic reviews and meta-analyses statement. Results. A total of 12 clinical studies were included in the review. A high risk of bias was found in most of the articles, either because the relative items assessed were inadequate or because they were unclearly described. The third molars were not correlated with more severe anterior tooth crowding in most of the studies. However, four of them described a different outcome. Conclusion. Definitive conclusions on the role of the third molars in the development of anterior tooth crowding cannot be drawn. A high risk of bias was found in most of the trials, and the outcomes were not consistent. However, most of the studies do not support a cause-and-effect relationship; therefore, third molar extraction to prevent anterior tooth crowding or postorthodontic relapse is not justified.

  3. Tratamiento quirúrgico de las malposiciones dentales Surgical treatment of dental malpositions

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    A. Jiménez Burkhardt

    2004-06-01

    Full Text Available Resumen: Presentamos los resultados obtenidos tras 17 años de experiencia en el tratamiento quirúrgico de las malposiciones dentales. Se incluyen los autotrasplantes de molares incluidos, autotrasplantes de caninos retenidos y reubicación de incisivos, caninos o premolares mal posicionados; 81 piezas dentales en total, de los cuales 60 dientes corresponden a autotrasplantes y 21 a reubicaciones, obteniendo un alto porcentaje de éxito. Se explica en detalle las indicaciones, técnica quirúrgica y resultados, concluyendo en que a la vista de los mismos, la manipulación quirúrgica de dientes retenidos sanos tiene un alto porcentaje de éxito a largo plazo.Abstract: We present the results obtained during our 17 years of experience in surgical treatment of dental malpositions. We include the autotransplantation of embedded molars, autotransplantation of retained canines and the repositioning of malpositioned incisors, canines and premolars; A total of 81 teeth, 60 autotransplanted and 21 repositioned, with a large degree of success. Detailed explanation is given regarding the surgical indications, techniques and results. In view of this, a conclusion is reached regarding the high, long-term success rate of surgical manipulation of embedded, healthy teeth.

  4. The Importance of Immediate Bone Block Autograft to Successfully Restore the Function and Aesthetic of the Anterior Alveolar Process and Teeth.

    Science.gov (United States)

    Singer, Lawrence David

    2015-12-01

    Maxillofacial traumatic injuries can damage the jaw, teeth, and soft tissues of the head and neck region. When these injuries occur, best practice is to reconstruct as comprehensively as is clinically prudent at time of injury. Smart and efficient procedures during the initial surgery can minimize subsequent reconstructive procedures in scope and number, minimize expense, and result in a better final aesthetic and functional outcome. Restoration of anterior alveolar jaw fractures with comminuted or avulsed segments becomes a complex prospect when left untreated after initial trauma or injury and can result in alveolar ridge defects that are difficult, costly, and cumbersome to repair. This case report details one 19-year-old woman who had a traumatic injury in these areas and has a best result outcome because of immediate reconstruction efforts involving a bone block autograft to preserve alveolar process anatomy.

  5. Applications of cone-beam computed tomography to assess the effects of labial crown morphologies and collum angles on torque for maxillary anterior teeth.

    Science.gov (United States)

    Kong, Wei-Dong; Ke, Jun-Yu; Hu, Xiang-Quan; Zhang, Wu; Li, Shu-Shu; Feng, Yi

    2016-11-01

    Currently, cone-beam computed tomography (CBCT) has been widely used because of its capacity to evaluate the anatomic structures of the maxilla, mandible, and teeth in 3 dimensions. However, articles about the use of CBCT to evaluate the relationships between the morphology of individual teeth and torque expression remain rare. In this study, we aimed to determine the influence of labial crown morphologies and collum angles on torque for maxillary anterior teeth using CBCT. A total of 206 extracted maxillary anterior teeth were selected to establish scanning models using dental wax, and they were scanned by CBCT. Three-dimensionally reconstructed images and median sagittal sections of the teeth were digitized and analyzed with AutoCAD software (Autodesk, San Rafael, Calif). The angle α, formed by the intersection of the tangent at a certain vertical height on the labial surface from the incisal edge with the crown long axis, and the collum angle, were measured. The variations in angle α at different heights from the incisal edge for the same type of tooth were statistically significantly different (P <0.001). Moreover, the variations between collum angles and 0° for any type of maxillary anterior tooth were statistically significant (P <0.01). This study suggested that there are great differences in labial crown morphologies and collum angles for maxillary anterior teeth between persons, indicating that the morphologies of these teeth do play important roles in torque variations. Copyright © 2016 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

  6. In vitro analysis of residual tooth structure of maxillary anterior teeth after different prosthetic finish line preparations for full-coverage single crowns.

    Science.gov (United States)

    Borelli, Bruna; Sorrentino, Roberto; Goracci, Cecilia; Zarone, Fernando; Ferrari, Marco

    2013-03-01

    To evaluate residual dentin thickness (RDT) after different tooth preparations, 90 sound maxillary anterior teeth were selected and divided into 3 groups according to tooth type (n = 30), namely, maxillary central incisors, maxillary lateral incisors, and maxillary canines. In each group, specimens were randomly divided and prepared for single-crown coverage with shoulder (SHO, n = 10, control), slight chamfer (CHA, n = 10), and knife-edge (KNE, n = 10) finish lines. After tooth preparation, specimens were sectioned and divided into 4 subgroups (buccal, distal, palatal, and mesial) according to measurement area. RDT values were compared by using one-way ANOVA and Tukey's post hoc test (P = 0.05). Significant differences were found between SHO and the other two groups (P 0.05). SHO was significantly more aggressive than CHA and KNE, which were comparable. Interproximal areas became critical due to thin RDT, which could potentially compromise the structural and biological integrity of teeth. The choice of finish line should be guided by careful clinical evaluation.

  7. Comparative in vivo evaluation of restoring severely mutilated primary anterior teeth with biological post and crown preparation and reinforced composite restoration

    Directory of Open Access Journals (Sweden)

    Grewal N

    2008-01-01

    Full Text Available Background: This study was designed to compare the success rate of biological and composite restorations when used to replace structural loss of primary anterior teeth using intracanal post for radicular support of the restoration. Materials and Methods: Forty-two patients aged between 3-5 years presenting with early childhood caries (ECC received at least one or more composite and biological restorations for comparative evaluation. A total of 150 restorations were done (75 biological restorations and 75 composite restorations. The restorations were evaluated single-blind according to a modified USPHS system. Assessment of the patient′s response in accepting a biological restoration, psychological impact of the restorations, view of the parents, and peer group reviews, etc. were recorded in a response sheet in presence of the child and the parents. Observations and Results: In vivo clinical performance of biological post and crown restorations and intracanal reinforced composite restorations was comparable with respect to shade match, marginal discoloration, marginal integrity, surface finish, gingival health, retention, and recurrent carious lesions. The cost effectiveness of biological restorations was certainly a positive attribute. Conclusion: The biological restoration presented as a cost effective, clinician friendly, less-technique sensitive, and esthetic alternative to commercially available restorative materials used for restoring deciduous teeth affected by ECC.

  8. Comparative in vivo evaluation of restoring severely mutilated primary anterior teeth with biological post and crown preparation and reinforced composite restoration.

    Science.gov (United States)

    Grewal, N; Seth, R

    2008-12-01

    This study was designed to compare the success rate of biological and composite restorations when used to replace structural loss of primary anterior teeth using intracanal post for radicular support of the restoration. Forty-two patients aged between 3-5 years presenting with early childhood caries (ECC) received at least one or more composite and biological restorations for comparative evaluation. A total of 150 restorations were done (75 biological restorations and 75 composite restorations). The restorations were evaluated single-blind according to a modified USPHS system. Assessment of the patient's response in accepting a biological restoration, psychological impact of the restorations, view of the parents, and peer group reviews, etc. were recorded in a response sheet in presence of the child and the parents. In vivo clinical performance of biological post and crown restorations and intracanal reinforced composite restorations was comparable with respect to shade match, marginal discoloration, marginal integrity, surface finish, gingival health, retention, and recurrent carious lesions. The cost effectiveness of biological restorations was certainly a positive attribute. The biological restoration presented as a cost effective, clinician friendly, less-technique sensitive, and esthetic alternative to commercially available restorative materials used for restoring deciduous teeth affected by ECC.

  9. Cone beam computed tomographic evaluation of two access cavity designs and instrumentation on the thickness of peri-cervical dentin in mandibular anterior teeth

    Science.gov (United States)

    Varghese, Vinny Sara; George, John V.; Mathew, Sylvia; Nagaraja, Shruthi; Indiresha, H. N.; Madhu, K. S.

    2016-01-01

    Background and Objectives: The aim of the study was to determine the effect of two access cavity designs on the peri-cervical dentin thickness before and after instrumentation using cone beam computed tomography (CBCT). Materials and Methods: Sixty mandibular anterior teeth were divided into two groups of thirty teeth each: Group I: conventional access cavity preparation, where access was prepared just above the cingulum and Group II: incisal access cavity preparation, where access was prepared in proximity to the incisal edge. CBCT scans were taken preoperatively, following access cavity preparation and post instrumentation. 200 μm thick slices were obtained 4mm apical and coronal to the cemento-enamel junction. The peri-cervical dentin thickness was calculated on the facial, lingual, mesial, and distal for all the three obtained scans. Results: The analysis showed that access cavity preparation and instrumentation resulted in a significant loss of tooth structure in Group I on all surfaces, but in Group II, there was a significant loss of tooth structure only in the mesial, lingual, and distal surfaces (P < 0.05). Conclusion: Incisal access cavity preparation resulted in lesser loss of dentin in the peri-cervical region. PMID:27656065

  10. Catheter malposition following supraclavicular approach for subclavian vein catheterisation--case reports.

    Science.gov (United States)

    Singh, Prem K; Ali, Zulfiquar; Rath, Girija P; Prabhakar, Hemanshu

    2008-10-01

    The supraclavicular approach of subclavian vein catheterization is associated with the lowest incidence of malposition. We report two cases of unusual malpositions seen during central venous cathelerization of subclavian vein via supraclavicular approach. Literature search did not reveal such malpositions. The possible cause for the malposition and method to prevent it is discussed.

  11. 如何规避前牙美学修复的龈边缘暴露%Considerations of avoiding exposure of gingival margin in anterior teeth aesthetic prosthodontics

    Institute of Scientific and Technical Information of China (English)

    赵克; 魏雅茹

    2011-01-01

    Exposure of gingival margin is frequently observed in anterior teeth aesthetic restoration. How to obtain an expected result is a significant challenge during prosthodontic treatment. The present article discussed gingival bio-type, conditions of periodontal tissue, location of margin of restoration, gingival retraction, and provisional restoration, etc. Which would affect the final aesthetic outcome of anterior teeth restorations. The aim of this article is to figure out how to effectively avoid the exposure of gingival margin in anterior teeth aesthetic restoration, and to improve the finally aesthetic outcome of anterior teeth restoration.%前牙修复后常因修复体龈边缘暴露而影响最终美学效果,如何规避此问题是口腔医生面临的挑战.本文通过牙龈生物型、牙周组织状况、修复体龈边缘位置、排龈技术与排龈线及暂时修复体制作等几个方面,探讨前牙美学修复中如何有效地规避修复体龈边缘暴露,以提高前牙修复的美学效果.

  12. Membrane-assisted mineral trioxide aggregate apical plug for management of traumatized immature anterior teeth: Clinical case reports

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    Raji Viola Solomon

    2014-01-01

    Full Text Available Apexification using calcium hydroxide has many disadvantages, such as, it needs more time for the treatment, chance for fracture of the tooth, and incomplete calcification of the bridge. There are many alternative treatments introduced, which have gained popularity, such as, forming an apical plug using mineral trioxide aggregate (MTA, for excellent results. In cases of wide open apices, it is difficult to limit the restoration to the working length, as such situations lead to the apical extrusion of the material into the periapical region, which prevents further healing. Such conditions can be best treated with the use of a resorbable collagen membrane, which limits the restoration till the working length and prevents the extrusion of the material beyond the apex. The present case reports highlight the non-surgical management of immature teeth by using a membrane as a barrier, with an MTA apical plug, followed by crown rehabilitation.

  13. In vitro evaluation of a silica whitening toothpaste containing blue covarine on the colour of teeth containing anterior restoration materials.

    Science.gov (United States)

    Philpotts, Carole J; Cariddi, Eufemia; Spradbery, Paul S; Joiner, Andrew

    2017-08-18

    To investigate the effects of a silica-based whitening toothpaste containing blue covarine on the colour of restorations in extracted human teeth. Human extracted teeth were mounted in acrylic resin. A cavity was cut into the enamel surface and the specimen restored with either glass ionomer or composite dental materials. Following 4 weeks storage in water, specimens were treated with either water, red wine or a toothpaste containing blue covarine (n=10) for 24h followed by brushing with a silica-based toothpaste. Specimens were imaged with a digital imaging system at baseline, after 24h treatment and after brushing with a silica-based toothpaste. CIELAB colour parameters were determined for the restoration and the whole specimen and overall mean colour changes calculated (ΔE). Baseline and post-brushing images were compared subjectively for overall stain and staining around the restoration margin. Red wine produced the largest ΔE values for whole specimens and for all restoration materials and the largest subjective stain scores for whole specimens and restoration margins. The red wine stain was not completely removed by brushing with a silica-based toothpaste. Comparisons of the red wine group with either the blue covarine toothpaste group or the water group were of statistical significance for all parameters (ANOVA, Tukey-Kramer, p0.05) to the water group, for all restoration material types. Exaggerated treatment with a blue covarine containing toothpaste does not significantly affect the colour of the restoration or the restoration margin of the dental materials tested versus a water alone treatment. The silica-based blue covarine containing toothpaste does not permanently stain the restorative materials tested or their margins. Copyright © 2017. Published by Elsevier Ltd.

  14. 方丝弓矫治器联合前牙转矩辅弓在正畸治疗中的应用%Application of edgewise appliance combined with anterior teeth torquing auxiliary arch in orthodontic treatment

    Institute of Scientific and Technical Information of China (English)

    汪伟材

    2012-01-01

    Objective To investigate the clincial torquing effectts of edgewise appliance combined with anterior teeth torquing auxiliary arch in the treatment of anterior teeth malocclusion. Methods Forty-two patients with Angle Class Ⅱ Category 1 malocclusion receiving tooth extraction in our hospital from June 2006 to December 2008 were randomly divided into the observation group and the control group, with 21 patients in each group respectively. The control group was given the edgewise orthodontic treatment and on this basis the observation group was given the combined treatment of anterior teeth torquing auxiliary arch for fine regulating. The lateral skull positioning X-ray was shooted before and after the gap was closed, and the incisor torques of the two groups were studied comparatively. Results For the observation group, the width of upper dental arch increased significantly, the anterior teeth covering significantly reduced by (3.55+1.68) mm and the anterior teeth overbite decreased by (0.78±0.31) mm. The observation group was significantly different from the control group in the ANB, U1-SN, U1-L1, U1-NA, etc (P < 0.05). Conclusion In the treatment of anterior teeth malocclusion, the edgewise appliance combined with anterior teeth torquing auxiliary arch can effectively control the torque of upper and lower occlusal anterior teeth, reduce the inclination of upper and anterior teeth and lips and anterior teeth covering, and shorten the treatment course. In addition, it is simple and highly safe, thereby worthy of clinical application.%目的 探讨方丝弓联合前牙转矩辅弓在治疗前牙错(牙合)过程中转矩的临床效果.方法 选择我院2006年6月~2008年12月收治的安氏Ⅱ类1分类错(牙合)拔牙患者42例,将其随机分为观察组和对照组,每组各21例,对照组给予方丝弓正畸治疗,观察组在此基础上联合前牙转矩辅弓进行精细调节,关闭间隙前后拍摄X线头颅定位侧位片,对两组上

  15. A SINGLE VISIT IMMEDIATE TEMPORIZATION WITH NATURAL TOOTH PONTIC FOR PERIODONTALLY INVOLVED ANTERIOR TEETH : ANESTHETIC AND INNOVATIVE APPROACH

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    Nilofer Sultan Sheikh, Neelima S. Rajhans, Preeti Mundhe, Gabriela Jude Fernandez, Nilkanth Mhaske, Nikesh Moolya, Sudeep HM

    2015-01-01

    Full Text Available Aim and Objectives: Sudden loss of anterior tooth is a dreadful situation. It can be as a result of trauma, endodontic failure or periodontal disease which is a true aesthetic emergency for a patient. Along with the patient, the dentist also emphasizes on saving an anterior tooth for the primary reason of aesthetics. If the tooth crown is intact, is not grossly decayed, broken down or discoloured, it can be used as a natural tooth pontic in designing an interim prosthesis. Case: A chair side technique for replacing the missing tooth using the patient’s own natural tooth as a pontic in the three dimensional original position using a fibre reinforced composite resin splint thus restoring the aesthetics and relieving the apprehension of the patient, as described in this case report. Conclusion: The concept of Natural tooth pontic placement is a simple, economical, minimal intervention, viable and an easy to handle treatment option and promises an excellent transient aesthetic solution for a lost tooth as well as require minimal or no tooth preparation, thus is a reversible technique and avoids the laboratory cost.

  16. 流体树脂应用于乳前牙美修复的效果评价%Clinical Application of Flowable Resin to Anterior Primary Teeth for Aesthetic Restoration

    Institute of Scientific and Technical Information of China (English)

    施春梅; 欧晓丽; 唐继伟; 李焱

    2012-01-01

    Objective To evaluate the clinical effect of light-cure flowable resins on the aesthetic restoration of anterior primary teeth caries. Methods Two different preventive restorative treatments were applied to anterior primary teeth in 65 patients( 169 teeth ). Test group:85 anterior primary teeth were removed their caries tissue,in which 40 teeth of enamel caries were treated with Wave flow flowable resins( test group A ) and 45 teeth of dentine caries were treated with Wave Flow flowable resins and composite resin( test group B ). Control group:84 anterior primary teeth were treated with composite resin,in which 37 teeth of enamel caries were treated with composite resin( control group A ) and 47 teeth of dentine caries were treated with composite resin( control group B ). The successful rates on the 3rd, 12th,36th month after the restoration of anterior primary teeth caries were analyzed. Results The patients were followed up for 3 years. There was no statistical difference in the successful rate on the 3rd, 12th month after the restoration of anterior primary teeth caries between the four groups( P > 0. 05 ). But after 36-month follow-up, the film coating retention rates of test group A and B were 88.6% ,87.2% ,which significantly higher than those of control group A and B( 65.6% ,61.9% ). There was statistical difference between test groups and control groups( P < 0. 01 ); Test group was superior to control group in shade,color and secondary caries of restoration( P <0.05 ). Conclusion light-cure flowable resin used in the aesthetic restoration of anterior primary teeth is reliable and effective.%目的 观察光固化流体树脂美容修复乳前牙龋的临床疗效.方法 对65例169颗两侧同名乳前牙分别采用两种不同的树脂充填方法.试验组:85颗乳前牙龋在磨除龋坏牙体组织后应用流体树脂修复牙釉质龋40颗(试验组A);复合树脂与流体树脂联用修复牙本质龋45颗(试验组B);对照组:84颗乳前牙龋直

  17. Evaluation of the Root and Canal Morphology of Mandibular Permanent Anterior Teeth in an Iranian Population by Cone-Beam Computed Tomography

    Directory of Open Access Journals (Sweden)

    Mohsen Aminsobhani

    2013-01-01

    Full Text Available Objective: To evaluate differences in the root and canal configurations of mandibular permanent anterior incisors and canines in an Iranian population by means of Cone Beam CT (CBCT images.Materials and Methods: Four hundred CBCT images of mandibular permanent incisors and canines that met the inclusion criteria were evaluated. Vertucci´s classification was used to evaluate the number of roots, number of root canals, root lengths, root curvatures and canal types.Results: Totally 632 central incisors, 614 lateral incisors and 608 canines were evaluated. The average length of the mandibular central, lateral incisors and canines was 21.3±0.10, 21.9± 0.13 and 25.1± 0.11 mm, respectively. All of the mandibular central and lateral incisors had one root, but the incidence of single-rooted mandibular canines and two-rooted mandibular canines was 96.3% and 4.7%, respectively. The majority of mandibular central, lateral incisors and canines had one canal (72.7%, 70.6% and 71.8%, respectively. Five types of Vertucci canal configurations were seen in the evaluated teeth. Type 1 Vertucci configuration was the most prevalent configuration (72.3%, 70.6% and 71.8% for the central, lateral incisors and canines, respectively, and type 5 Vertucci canal configuration was the least prevalent type seen (3.3%, 3.2% and 2.3% for the central, lateral incisors and canines, respectively. The most frequent root curvatures in these teeth were distally and buccally. No significant difference was seen between male and female patients regarding any of the parameters evaluated in this study (p>0.05.Conclusion: More attention should be given to the detection of additional canals and the recognition of canal curvature in Iranian patients.

  18. 前牙残根冠延长术后纤维桩核冠修复的临床研究%Clinical research of fiber post-core crown restoration after crown lengthening for upper anterior teeth residual root

    Institute of Scientific and Technical Information of China (English)

    罗永宏; 尹丽媚; 李慧; 刘青; 冯建国

    2016-01-01

    Objective To investigate curative effect by fiber post-core crown restoration after crown lengthening for upper anterior teeth residual root. Methods A total of 20 upper anterior fractured, or decayed to subgingival 2~4 mm teeth were repaired by fiber post-core and all-ceramic crown restoration on subgingival fracture surface after crown lengthening. Results There were 12 patients (19 teeth) received successful operation, along with good postoperative condition and successful crown restoration. Shallow defect group (10 teeth) had higher instant satisfaction degree as (9.5±0.3) points than (9.3±0.3) points of deep defect group (9 teeth) (P>0.05). The difference of mean plaque index and periodontal pocket depth had no statistical significance between shallow defect group and deep defect group (P>0.05), while the difference of their mean bleeding index and gingival index had statistical significance (P0.05)。浅缺损组和深缺损组残根修复后的平均菌斑指数、牙周袋深度比较(P>0.05);平均出血指数、牙龈指数比较(P<0.05)。结论前牙残根冠冠延长术能暴露根面,纤维桩及瓷全冠后可以达到良好地修复效果。

  19. Clinical evaluation of fractured immature anterior permanent teeth after immediate restoration%年轻恒前牙冠折后即刻冠修复的疗效观察

    Institute of Scientific and Technical Information of China (English)

    陈永丰; 马兆峰; 李石

    2012-01-01

    目的:通过21例(29颗)年轻恒前牙外伤冠折实例,讨论外伤冠折牙的即刻临床处理方法及效果.方法:对29 颗年轻恒前牙冠折,根据不同情况分别进行了间接盖髓术、活髓切断术、根尖诱导术.术后即刻或1周内采用断冠再接、直接树脂修复、活动义齿对缺损牙行临时冠修复,缺损牙修复后经过至少1年的临床观察.结果:冠折的年轻恒前牙经过相应的牙髓治疗与冠修复治疗,绝大多数患牙取得了良好的治疗效果.结论:年轻恒前牙外伤性冠折,在尽可能促进牙根继续发育的同时,即刻冠修复对于儿童身心健康具有重要意义.%Objective The objective of this study is to discuss the clinical effect of immediate restoration of fractured 29 immature permanent anterior teeth from 21 patients. Methods 21 cases including 29 fractured anterior teeth were treated by indirect pulp capping, partial pulpotomy and apexification respectively.Then.the fractured teeth were restored with esthetic light-cured resin, patients' natural crown and removable prosthesis.AII the provisional restorations were observed at least for 1year. Results Fractured permanent anterior teeth were treated endodontically.including 7 indirect pulp capping, 19 partial pulpotomy and 3 apexification.During the period of observation.pulpitis occurred from 1 tooth of indirect pulp capping and 2 teeth of partial pulpotomy.and apexification was performed for the 3 teeth.Fracture occurred from 2 light-cured resin restored teeth.The rest restoration presented satisfied appearance and function. Conclusion It is suggested that immediate restoration is important to the fractured immature permanent anterior teeth in prerequisite of maintaining root continuous growth.

  20. Clinical and radiographic assessment of mineral trioxide aggregate and calcium hydroxide as apexification agents in traumatized young permanent anterior teeth: A comparative study

    Science.gov (United States)

    Damle, S. G.; Bhattal, Hiteshwar; Damle, Dhanashree; Dhindsa, Abhishek; Loomba, Ashish; Singla, Sumit

    2016-01-01

    Background: To evaluate and compare the efficacy of mineral trioxide aggregate (MTA) and traditionally used calcium hydroxide (Ca(OH)2) in inducing root end formation of immature roots of traumatized young permanent anterior teeth. Materials and Methods: The study was carried out on 22 nonvital, immature permanent maxillary incisors. Samples were allotted into two groups - Group I MTA and Group II Ca(OH)2 Success rate was determined based upon the time duration required for apical barrier formation. The canals were obturated using gutta-percha points in MTA group, after 24 h, whereas in Ca(OH)2 group, obturation was carried out after radiographic confirmation of the apical barrier. The clinical and radiographic evaluation was carried out at a follow-up periods of 3, 6, and 9 months and statistical analysis was carried out by SPSS version 15.0 statistical analysis software (Chi-square test and fisher exact test). Results: In MTA Group, barrier formation was observed in 90.90% of the patients after 9 months whereas in Ca(OH)2 Group, the same was observed in 81.81%. The mean time required for barrier formation in MTA group was 4.90 months and 5.33 months in Ca(OH)2 group. Conclusion: MTA and Ca(OH)2, as medicaments for apexification, were comparable in terms of the evaluation parameters. However, MTA was beneficial in terms of immediate obturation of immature roots with wide open apices. PMID:27274351

  1. Evaluation of threshold response and appropriate electrode placement site for electric pulp testing in fluorosed anterior teeth: An in vivo study

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    Harikumar Vemisetty

    2016-01-01

    Conclusion: Within the limitations of this study, it can be concluded that fluorosed teeth respond to higher threshold levels than the non-fluorosed teeth, and incisal edge was the optimal electrode placement site.

  2. 前牙美学修复中数字微笑设计的护理及满意度分析%Nursing practice and application of digital smile sesign in the esthetic restoration of anterior teeth

    Institute of Scientific and Technical Information of China (English)

    秦晨; 赵雯; 周慧

    2016-01-01

    Objective To discuss the nursing cooperation process and results of digital smile design (DSD) technique in the esthetic restoration of anterior teeth. Methods From June 2012 to Dec. 2015,106 patients with anterior teeth esthetic complaints were treated using DSD technique, and the patients satisfaction were evaluated by visual analogue scale(VAS). ResultsThe VAS scores of overall and various restoration types were higher than 8. All the patients were satisifed with the esthetic results of restoration of anterior teeth using DSD technique.Conclusion Skilled nursing cooperation in preparation preoperative, esthetic information acquisition and software analysis processes are prerequisite to the success of DSD technique in the esthetic restoration of anterior teeth.%目的:总结数字微笑设计(digital smile design,DSD)在前牙美学修复中的护理配合流程和效果。方法:对2012年6月-2015年12月采用DSD进行前牙美学修复的106例患者采用直观模拟量表(visual analogue scale,VAS)评价其美学修复满意度,并且总结相关治疗护理配合。结果:106例患者总体满意度分值和各项缺损类型的满意度分值均大于8分,对DSD辅助的前牙美容修复治疗过程及最终效果满意。结论:护理人员在DSD临床接诊、美学信息采集,DSD软件分析使用等方面的规范化默契配合则是这一技术得以高效、顺利开展的重要保障。

  3. Clinical retrospective analysis of children for mixed dentition traumatic anterior teeth completely dislocation replantation%替牙期外伤性前牙完全脱位再植术的临床分析

    Institute of Scientific and Technical Information of China (English)

    赵然; 李凤和; 陈光

    2012-01-01

    目的:探讨替牙期完全脱位前牙再植术后的效果和相关影响因素.方法:对48例患儿58颗完全脱位前牙治疗方法和临床疗效进行分析.脱位前牙再植后复诊行牙髓测试、牙周检查,2周牙髓活力阴性的患牙行根尖诱导成形术,6个月~3年根尖孔完全形成后行根管永久充填治疗.结果:再植术后3年,5颗患牙活力存在,牙髓存活率达8.62%; 53颗患牙行根管治疗术后行X线检查,25颗患牙牙根牙周膜愈合,30颗患牙牙根部分牙周膜愈合和部分骨性愈合,3颗患牙不同程度牙根内外吸收,但无1例脱落.结论:早就诊且合理处理脱落牙、牙髓血管再生是牙再植术成功的关键,根尖诱导成形术可使替牙期牙根再度形成,牙骨质沉积于根端、封闭根尖孔,是替牙期脱位前牙治疗的重要手段,根管治疗可预防或减少脱位牙牙根的吸收.%Objective To explore the effects and related influential factors of replantation after complete dislocation of anterior teeth/tooth on mixed dentition patients experiencing tooth transitions. Methods Analysis of 48 patients with 58 traumatic anterior teeth were made based on treatments recieved and clinical observations.After the reimplantation for the traumatic anterior teeth, patients returned for dental pulp test and periodontal examination. 2 weeks later, apexification was performed after the dental pulp test had indicated a negative result.Six months to 3 years after apexification, permanent canal filling treatment was made once the apical had been fully formed. Results three years after the replantation,5 teeth exist vitality with a dental pulp survival rate of 8.62%; X-ray examination indicates that out of the 53 teeth have had apexification and canal filling treatment:25 teeth's tooth roots have periodontal ligament fully recovered (bined together or have been healed),30 teeth's teeth root have fully recovered iodontal ligaments and partial recover of the bone

  4. Changes in alveolar bone thickness due to retraction of anterior teeth during orthodontic treatment: A cephalometric and computed tomography comparative study

    Directory of Open Access Journals (Sweden)

    U S Nayak Krishna

    2013-01-01

    Full Text Available Objective: Evaluate the changes in alveolar bone as a result of maxillary and mandibular incisor retraction in patients with bimaxillary protrusion by means of using lateral cephalograms and computed tomography (CT scans and to investigate any occurrence of bony defects like dehiscence and fenestration. Subjects and Methods: Ten patients (age 15 ± 3 years with bimaxillary protrusion treated by extraction of four first premolars were investigated by lateral cephalograms and CT scans during pre-treatment (T1 and after 3 months of completion of incisor retraction (T2. The labial and lingual cortex of all the incisors were assessed on the CT scan with measurements taken at site adjacent to widest point of the labiolingual root in three slices separated by 3 mm at crest level (S1, mid root level (S2, and apical level (S3. Result: In the mandibular arch, after lingual movement of the incisors, the bone labial to the anterior teeth decreased in thickness at the coronal level of the left lateral and left central incisors. Left lateral incisor showed significant changes in all the three levels. In the maxilla the change in the labial bone thickness was not statistically significant. Lingual bone of all the incisors showed significant changes in S1 level and S3 levels. Few patients demonstrated bone dehiscence that was not visible macroscopically or cephalometrically. Conclusions: When incisors are retracted, the risk of adverse effect is present. This must be carefully monitored to avoid negative iatrogenic effects. This study needs follow up after 6 months or 1 year after completion of the orthodontic treatment to assess the long-term consequences.

  5. In vivo measurements of daily UV exposure of human anterior teeth using CaF{sub 2}:Tb,Sm as a thermoluminescence dosimeter

    Energy Technology Data Exchange (ETDEWEB)

    Saito, W., E-mail: saito-wataru@tsurumi-u.ac.j [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan); Ikejima, I. [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan); Fukuda, Y. [Department of Urban Environment, Faculty of Human Environment, Osaka Sangyo University, 3-1-1, Nakagaito, Daito, Osaka (Japan); Momoi, Y. [Department of Operative Dentistry, Tsurumi University, School of Dental Medicine, 2-1-3, Tsurumi, Tsurumi-ku, Yokohama (Japan)

    2011-03-15

    Ultraviolet radiation (UV) has been indicated as one of the causes of discoloration of dental materials yet the standard requires that dental polymers be irradiated with light from a xenon lamp, which includes UV, to evaluate their color stability. It is doubtful that dental polymers in the mouth are exposed to large energy of UV on a daily basis, but there have been no reports concerning exposure. In the present study, we used thermoluminescence (TL) from sintered CaF{sub 2}:Tb,Sm, which is highly sensitive to UV, to measure the daily energy of UV exposure to the labial surface of the maxillary anterior teeth, which are regarded as receiving the maximum exposure among oral tissues. We produced disks of CaF{sub 2} co-doped with Tb{sub 4}O{sub 7} and Sm{sub 2}O{sub 3} (sintered CaF{sub 2}:Tb,Sm) that were 5 mm in diameter and 1 mm thick, and placed them inside glass cases that had a 7-mm external diameter, 3-mm height, and 1-mm thickness of glass made of synthetic silica with {>=}90% UV transmittance. These glass cases were fixed in dental mouthpieces in a position corresponding to the central maxillary incisors. These mouthpieces were worn by 11 subjects and UV measurements were carried out over a 24-h period in a uniform environment. The results of these TL measurements showed a TL glow peak in the region of 430 K. This was the same as that seen with irradiation from a xenon lamp as basic illumination. The daily UV radiant energy was 72.2 mJ/cm{sup 2} (32.7-143.8 mJ/cm{sup 2}), calculated from the relationship between TL intensity and UV radiant energy. This corresponded to 0.02% of the UV radiant energy contained in the light irradiation specified by ISO 4049.

  6. Differential Diagnosis of Cardiac Malposition by Fetal Echocardiography

    Institute of Scientific and Technical Information of China (English)

    Ying WU; Feng TAO; Tao LIU; Ling ZANG; Shi-long LIU

    2009-01-01

    Objectives To explore the method and operating skill of fetal echocardiography in diagnosing cardiac malposition. Methods 91 consecutive fetuses were studied (control: 50 cases, cardiac malposition : 41 cases) between 2003 and 2008. The position of fetal heart was evaluated according to the fetal posture and the visceral situs by fetal routine scan-ning. The detailed echocardiography should be performed in the differential diagnosis of cardiac lesions when the heart was found to be abnormal position. Results In the control group, all fetuses were levocardia. 39 cases of cardiac mal-positions were detected by fetal echocardiography, included 25 fetuses with dextrocardia, 6 mesocard, 5 with levover-sion of heart, 3 common heart of conjoined twins and 2 extrathorax heart. Two of dextroversion were missed by fetal routine scanning, but found by autopsy or operation after birth. Conclusions When the abnormal visceral situs was found by fetal routine scanning, there is exceedingly high incidence of cardiac malpositions. Proficiently operating skill of fetal echocardiography is helpful to detect abnormal fetal cardiac position.

  7. 正畸治疗后下前牙拥挤复发的牙性因素%Dental Factors for the Relapse of Lower Anterior Teeth Crowding and Rotation after Orthodontic Treatment

    Institute of Scientific and Technical Information of China (English)

    冯淑敏; 曾赞文; 殷慧

    2011-01-01

    目的 评估下前牙形态、接触点及下尖牙间宽度改变对正畸治疗后下前牙拥挤复发的影响.方法 选择156例下前牙旋转、拥挤复发患者的矫治前(T1)、矫治后(T2)以及保持3年后(T3)模型;以126例个别正常牙 合为对照组并制取模型.测量下前牙不整齐指数(mandibular irregularity index,MD-IRID)、下颌尖牙间宽度(mandibular intercanine width,MD-ICW),计算下切牙牙冠近远中径(mesiodistal length,MD)与唇舌径(faciolingual width,FL)比例(MD/FL),并观察下前牙间的接触形式,分析以上指标与下前牙拥挤复发的关系.结果 试验组T2期的下尖牙间宽度较T1期明显增大,而T3期的下尖牙间宽度较T2期又明显减小;下前牙临床排列整齐且IRID≤1.5 mm者,下切牙MD/FL正常或偏小,MD-ICW偏大;下前牙临床排列不整齐且IRID>1.5 mm者,下切牙MD/FL偏大,MD-ICW偏小;严重复发者(IRID>6.5 mm)下前牙接触点均有异常,邻牙间多为点接触,解剖接触点之间分离度大.结论 MD/FL偏大、下前牙间点接触及过度扩大下尖牙间宽度可能是矫治后下前牙拥挤复发的影响因素.%Objective To evaluate the impact of teeth shape, size and contact points, and mandibular inter-canine width on the post-treatment relapse of lower anterior teeth crowding and rotation. Methods Four hundred and sixty-eight dental models were selected from 156 cases of crowding and rotating lower anterior teeth before therapy ( T1 ), after therapy (T2) and in retaining therapy for three years (T3) with 126 normal occlusion models there from as the standard control group. Then the irregu larity index (IRID) of lower anterior teeth and the mandibular inter-canine width were measured followed by calculation of the mesiodistal length (MD), faciolingual width ( FL), MD/FL ratio of mandible incisor in the models of the 1 56 selected cases grouped by above three stages ( T1, T2, T3). Finally, the contact means between lower anterior teeth, the

  8. The clinical application of cosmetic repair of anterior teeth by 3M nano resin%3M纳米树脂在前牙美容修复中的临床应用观察

    Institute of Scientific and Technical Information of China (English)

    王栋

    2013-01-01

    目的:观察3M纳米树脂应用于前牙缺损美容修复的临床效果。方法:将2007年以来147例患者,256颗患牙通过酸蚀冲洗三步法粘接系统进行树脂美容修复。根据评价标准,定期随访,观察修复的效果。结果:6个月后复查,3M纳米树脂修复前牙成功率为97.54%,24个月后复查,成功率为93.01%。结论:3M 纳米树脂固位美观性好,非常适合前牙缺损的美容修复。%Objective:To evaluate the clinical prosthetic effect of by reparation of 3M nano resin in anterior teeth. Methods:147 patients since 2007 were enrol ed in the study. They were used resin for cosmetic teeth restoration by etch-and-rinse three-step adhesive system. According to the evaluation criteria, al patients were fol owed-up on a regular basis and observed the effect of the repair. Results:after 6 months and 24 months, the success rates of the reparation of 3M nano resin in anterior teeth were 97.54%and 93.01%respectively. Conclusion:3M nano resin has good retentive and aesthetic property and is fit for cosmetic repair of anterior teeth.

  9. The evaluation and application of crown lengthening surgery in 43 cases of anterior teeth defect%牙冠延长术在43例前牙缺损中的应用及评价

    Institute of Scientific and Technical Information of China (English)

    陈媛媛

    2012-01-01

      目的 探讨牙冠延长术在前牙缺损修复中的应用效果.方法 选取前牙缺损43例患者、共52颗患牙行牙冠延长术,6周后行核桩冠修复,在治疗后3、6、12、24个月行门诊复诊.结果 随访结果显示,前牙缺损修复有效率为96.2%(50例),修复体稳固,未见牙龈炎及牙龈萎缩,X线显示根尖及牙周情况良好.1颗欠佳,1颗失败,主要表现为患牙12个月后发生松动、冠脱落、伴有牙龈轻度红肿.结论 牙冠延长术有助于牙体折断至龈下患牙的保存,值得推广.%  Objective To investigate the surgical crown lengthening in anterior teeth restoration effect.Methods Of anterior teeth defect in 43 cases,a total of 52 teeth with teeth crown lengthening surgery,6 weeks after the reparation,during the treatment and after 3, 6,12, 24 months of outpatient visits.Results Follow-up Results show,anterior tooth defect repair rate was 96.2%(50 cases),prosthesis stability,no gingivitis and gingival atrophy,X display periapical and periodontal condition.1 poor,1 teeth failed,mainly for the teeth occurred 12 months after loosening,crown off,accompanied by gingival mild swelling.conclusion The crown lengthening surgery contributes to the tooth breaking the subgingival tooth preservation,is worth popularizing.

  10. 玻璃纤维桩加全瓷冠修复前牙残根残冠的效果%Effects of glass fiber post plus all-ceramic crown on reparation of anterior teeth residual root and crown

    Institute of Scientific and Technical Information of China (English)

    郑加军; 李瑛; 彭庭莉; 谢良宪

    2012-01-01

    目的 观察玻璃纤维桩+全瓷冠修复前牙残根残冠的效果.方法 选择我科进行前牙残根、残冠修复治疗患者76例82颗患牙,采用玻璃纤维桩+全瓷冠修复,完成后6~12个月对患者进行随访,观察有无冠桩脱落、折断、松动以及牙龈、牙冠的色泽改变情况.结果 82颗患牙中,有1颗出现冠脱落,1例出现根尖叩痛.全部82颗患牙均未出现根折、桩核脱落,无继发龋坏,冠及龈边缘无变色,色泽美观.结论 玻璃纤维桩+全瓷冠修复前牙残根残冠临床效果良好.%Objective To observe the effects of glass fiber post plus all - ceramic crown on the reparation of anterior teeth residual root and crown. Methods 76 patients ( 82 front teeth ) receiving the reparation of anterior teeth residual root and crown in our department were selected and received the reparation by glass fiber post plus all - ceramic crown. Follow up was made 6-12 months after the reparation. Observe was made in whether there were any non - crown post shedding, split, and loosening and the changes in the color of gingival gum and crown. Results There were 1 tooth with the crown shedding and 1 case of percussion pain in the root among the 82 teeth. There was no split, loss of post - core, and secondary caries among all the 82 teeth. The color of their crown and gingival margin did not change. Conclusion Glass fiber post plus all - ceramic crown have good effect on the reparation of anterior teeth residual root and crown.

  11. The effect of fixed appliance and jaw pad for correction of permanent anterior teeth and maxillofacial region%固定矫治器加颌垫矫治恒前牙反颌的临床疗效

    Institute of Scientific and Technical Information of China (English)

    李黎

    2014-01-01

    目的:探讨固定矫治器加颌垫矫治恒前牙反颌的疗效。方法:收治恒前牙反颌患者29例,以固定矫治器联合后牙颌垫矫治器治疗,观察疗效。结果:解除反颌平均时间2~3个月,完成矫治12个月。结论:颌垫加固定矫正器在接触反颌的同时可排齐牙列,提高了治疗效果,缩短了疗程。%Objective:To explore the effect of fixed appliance and jaw pad for correction of permanent anterior teeth and maxillofacial region.Methods:29 patients with permanent anterior teeth and maxillofacial region were selected,and they were treated with fixed appliance and jaw pad.Observed the curative effect.Results:The average time of removing reverse jaw was 2 to 3 months,and the time of completing treatment was 12 months.Conclusion:Fixed appliance and jaw pad can contact the reverse jaw, at the same time,it can adjust the teeth to neat,so it improves the therapeutic effect and shortens the course of treatment.

  12. The application of invisible denture in traumatic anterior teeth deifciency of children%隐形义齿在儿童外伤性前牙缺失中的应用

    Institute of Scientific and Technical Information of China (English)

    王津惠; 丛洪泉; 彭立红; 李金春

    2016-01-01

    objective To evaluate the effect of invisible denture to maintain clearance and restore appearance in children's lack of traumatic anterior tooth.Methods Retrospective studied on the age, sex, booth bit, reason of injury, treatment method and effect evaluation of 92 children with traumatic anterior teeth deifciency loss last three years in our department. Results Accidental injury was the main cause in 7-15 ages traumatic anterior teeth deficiency children. The sex ratio was 1.7 :1. Maxillary incisor was the most vulnerable, accounting for 48.91%; Wearing invisible denture was no hurm in teeth micromaxillary deformity and psychology.Conclusion The invisible denture has therapeutic value on children traumatic anterior tooth missing gaps remain, appearance, psychological rehabilitation. It is the preferred treatment for traumatic anterior missing teeth of children.%目的:评价隐形义齿在儿童外伤性前牙缺失间隙保持和恢复容貌的效果。方法:选择近3年在笔者科室就诊的92例前牙外伤缺失的儿童患者,对其年龄、性别、牙位、外伤原因、治疗方法及效果评价进行回顾性研究。结果:本组7~15岁外伤性前牙缺失儿童病例中生活意外伤为主要原因,男女比例为1.7:1,上颌中切牙最易受伤,占48.91%,佩戴隐形义齿后无牙颌畸形和心理伤害病例发生。结论:隐形义齿对儿童外伤性前牙缺失的间隙保持、容貌恢复、心理康复有较好的治疗价值,是儿童外伤性前牙缺失首选的治疗方法。

  13. Correction of Malpositioned Implants through Periodontal Surgery and Prosthetic Rehabilitation Using Angled Abutment

    Science.gov (United States)

    de Avila, Érica Dorigatti; de Barros-Filho, Luiz Antônio Borelli; de Andrade, Marcelo Ferrarezi; Mollo, Francisco de Assis; de Barros, Luiz Antônio Borelli

    2014-01-01

    When dental implants are malpositioned in relation to the adjacent teeth and alveolar bone or in an excessive buccal or lingual position, the final prosthesis rehabilitation impairs the peri-implant health of the gingival tissues and the aesthetics of the patient. Thus, the purpose of this case was to report and discuss a multidisciplinary protocol for the treatment of a compromised maxillary tooth in a patient with an abscess in his right central incisor due to an excessive buccal implant position. The patient presented with an implant-supported provisional restoration on his right maxillary central incisor and a traumatic injury in his left central incisor. The treatment protocol consisted in (i) abutment substitution to compensate the incorrect angulation of the implant, (ii) clinical crown lengthening, (iii) atraumatic extraction of the left central incisor, and (iv) immediate implant placement. Finally, (v) a custom abutment was fabricated to obtain a harmonious gingival contour around the prosthetic crown. In conclusion, when implants are incorrectly positioned in relation to the adjacent teeth, associated with soft-tissue defects, the challenge to create a harmonious mucogingival contours may be achieved with an interdisciplinary approach and with the placement of an appropriate custom abutment. PMID:24955259

  14. Correction of Malpositioned Implants through Periodontal Surgery and Prosthetic Rehabilitation Using Angled Abutment

    Directory of Open Access Journals (Sweden)

    Érica Dorigatti de Avila

    2014-01-01

    Full Text Available When dental implants are malpositioned in relation to the adjacent teeth and alveolar bone or in an excessive buccal or lingual position, the final prosthesis rehabilitation impairs the peri-implant health of the gingival tissues and the aesthetics of the patient. Thus, the purpose of this case was to report and discuss a multidisciplinary protocol for the treatment of a compromised maxillary tooth in a patient with an abscess in his right central incisor due to an excessive buccal implant position. The patient presented with an implant-supported provisional restoration on his right maxillary central incisor and a traumatic injury in his left central incisor. The treatment protocol consisted in (i abutment substitution to compensate the incorrect angulation of the implant, (ii clinical crown lengthening, (iii atraumatic extraction of the left central incisor, and (iv immediate implant placement. Finally, (v a custom abutment was fabricated to obtain a harmonious gingival contour around the prosthetic crown. In conclusion, when implants are incorrectly positioned in relation to the adjacent teeth, associated with soft-tissue defects, the challenge to create a harmonious mucogingival contours may be achieved with an interdisciplinary approach and with the placement of an appropriate custom abutment.

  15. The analysis of the application of crown lengthening surgery in the dental restoration of traumatic anterior teeth%牙冠延长术在外伤前牙修复中的临床应用

    Institute of Scientific and Technical Information of China (English)

    刘赟; 高婵; 吴佩; 汪春仙; 熊贵忠; 刘心

    2014-01-01

    Objective:To investigate the clinical efficacy of crown lengthening of shortening or subgingival teeth on restoration of the traumatic anterior. Method:The front 50 teeth choice of trauma cases after loosening degree less than or e-qual to the first degree,subgingival crown fracture was above or equal 3 mm,after complete periodontal therapy,using method of flap combined with excision of bone turnover and root crown repositioned flap operation for lengthening surgery, routine repair in patients according to their oral cavity after 4~6 weeks operation. Result:All traumatic anterior teeth after operation may obtain enough clinical crown length,which resulting ferrule effect effective. Follow-up with traumatic anterior teeth after operation,gingival color is normal,its height is adjust with neighbor teeth,and all coordination is meet with crown edge sealing. Patient is satisfy with the function and elegant appearance of the traumatic anterior teeth after operation. Con-clusion:Crown lengthening is great significance of successful repair surgery of traumatic anterior teeth. In the process of op-eration and repair,we need to pay further attention to detail and time selection of repair surgery.%目的:探讨牙冠延长术在外伤前牙牙冠过短或缺损至龈下的患牙进行修复的临床疗效。方法:选择外伤后松动度≤Ⅰ度,牙冠折断至龈下≥3 mm的前牙52颗,对患牙完成根管治疗及牙周基础治疗后,采用翻瓣联合骨切除的方法及根向复位瓣手术行牙冠延长术,术后4~6周根据患者的口腔情况进行常规桩核冠修复。结果:所有患牙术后获得足够的临床冠长度,残根断端产生有效的箍效应。术后对患牙进行跟踪随访,患牙龈缘色泽正常、高度与邻牙相协调、全冠边缘密合。患者对患牙的功能、美观满意。结论:牙冠延长术对于外伤前牙的成功修复有重要意义,治疗过程中应注重手术的细节及修复时机的选择。

  16. Breath sound changes associated with malpositioned endotracheal tubes.

    Science.gov (United States)

    Mansy, H A; O'Connor, C J; Balk, R A; Sandler, R H

    2005-03-01

    Endotracheal tubes (ETTs) are used to establish airway access in patients with ventilatory failure and during general anaesthesia. Tube malpositioning can compromise respiratory function and can be associated with increased morbidity and mortality. Clinical assessment of ETT position normally involves chest auscultation, which is highly skill-dependent and can be misleading. The objective of this pilot study was to investigate breath sound changes associated with ETT malpositioning. Breath sounds were acquired in six human subjects over each hemithorax and over the epigastrium for tracheal, bronchial and oesophageal intubations. When the ETT was in the oesophagus, the acoustic energy ratio between epigastrium and chest surface increased in all subjects (p sounds may be useful for assessment of ETT positioning. More studies are needed to test the feasibility of this approach further.

  17. Clinical application of the effect of orthodontic traction on anterior teeth with subgingival root fracture%正畸牵引在前牙龈下牙折的临床应用

    Institute of Scientific and Technical Information of China (English)

    李霞; 时函

    2011-01-01

    目的 分析与探讨正畸颌向牵引对龈下牙折的临床效果.方法 龈下牙折患者17例,共18颗患牙,断端均位于龈缘下2~5 mm.经完善的根管治疗后2周,黏接方丝托槽开始正畸牵引,使其达到直接修复高度,牵引后保持3个月行修复治疗.测量分析不同阶段根尖片上断根根尖区相对骨密度改变.结果 18颗患牙经正畸牵引1~2个月后,断端伸长2~5 mm,保持3个月后,无明显松动,通过烤瓷冠修复均达到理想的美观效果.牵引后保持3个月,根尖区骨密度基本达到正常水平.半年后随访,牙周正常未见异常及复发.结论 正畸牵引可有效用于龈下牙折病人的修复前牙根牵引,疗效可靠.%Objective To summarize and analyze the clinical effect of orthodontic traction by means of edgewise fixed appliance for anterior teeth with subgingival root fracture.Methods 18 fractured anterior teeth in 17 patients extended 2 -5mm below the gingival line were selected.Two weeks after complete root canal therapy, edgewise brackets were agglutinated and orthodontic traction was performed for restoration of tooth height.After the extrusion completed, the tooth had been stabilized and held for 3 months.The bone density changes in the apical area were measured and analyzed.Results It need about 1 -2months to see 2 -5mm displacement distance in anterior teeth of 18 patients.After 3 months retention the location was stable.The incisor was restored with all ceramic crowns.Optimal esthetic was achieved when restoration was performed after orthodontic extrusion.The bone density in the apical area approached normal value within 3 months after treatment.At 6 - month follow-up, the periodontal tissues were normal and neither luxation nor relapse was noted.Conclusion Tooth traction method with edgewise appliance is an effective method for anterior teeth with subgingival root fracture.

  18. 口腔正畸治疗牙周病导致前牙移位的效果研究%The Research on Orthodontic Treatment Efficacy of Displaced Anterior Teeth Caused by Periodontal Disease

    Institute of Scientific and Technical Information of China (English)

    高莉娜

    2015-01-01

    目的:探讨口腔正畸治疗牙周病导致前牙移位的效果研究。方法选取2013年8月~2014年10月我院接诊的79例牙周病导致前牙移位的患者,按照入院的先后顺序分为两组,实验组和对照组,实验组采用口腔正畸治疗,对照组采用牙周病常规治疗,观察两组患者的治疗效果。结果实验组患者的治疗总有效率明显高于对照组,差异显著,有统计学意义(P<0.05);实验组患者的牙周袋深度、前牙覆盖情况、前牙覆牙合及牙周出血指数均低于对照组,差异显著,有统计学意义(P<0.05)。结论牙周病导致前牙移位采用口腔正畸治疗,能够恢复前牙移位,有效控制牙周炎症。%Objective The orthodontic treatment efficacy of displaced anterior a tooth caused by periodontal disease is to be investigated. Methods Choose 79 patients with displaced anterior teeth caused by periodontal disease that are treated in hospital from August 2013 to October 2014 and separate them into study group and control group according to their hospitalization sequence. Patients in study group are given orthodontic treatment, while patients in control group are given conventional treatment. And then observe the treatment efficacy of two groups. Results The treatment efficacy in study group is much higher than control group, there is a treatment differential between the two groups, such a differential has statistic value( P<0.05). In addition, the patients’ parameters in study group are lower than patients in control group with regarding to periodontal pocket depth, front teeth covering extension, and the anterior teeth occlusion condition and periodontal bleeding, such a differential has statistic value(P<0.05). Conclusion Orthodontic treatment is rather effective to cure displaced anterior teeth caused by periodontal disease and control periodontal infection, therefore, it is quite worthy to be promoted and applied.

  19. Clinical observation of root resorption caused by retraction and intrusion of the anterior teeth%内收及压低上前牙致牙根吸收的临床观察

    Institute of Scientific and Technical Information of China (English)

    魏艳华; 张端强

    2014-01-01

    Objective To investigate the root resorption during orthodontic treatment with retracting and intruding the anterior teeth. Methods There were 40 cases of Angle Class Ⅰor Angle Class Ⅱcrossbite of maxillary protrusion. Among them, 20 cases were treated by straight wire along (straight wire group), and the other 20 cases were treated by additional high pull J hook headgear (HPHG) to assist anterior teeth retraction. Panoramic radiographs were taken before and after the orthodontic treatment, and were used to evaluate the degree of root resorption of upper anterior teeth. Results Root resorption occurred in both groups, and the difference of the degree of root resorption between the two groups had statistical significance (P<0.01). There were differences of the degree of root resorption in each group before and after the treatment (P<0.01). Conclusion The combination of HPHG and straight wire in orthodontic treatment can lead to easy root resorption of anterior teeth.%目的:研究在正畸治疗中内收及压低上颌前牙时牙根吸收的情况。方法40例上颌前突的AngleⅠ类或AngleⅡ类1分类错牙合畸形的病例,其中20例采用单纯直丝弓治疗(直丝弓组),另外20例在内收前牙阶段配合应用高位J钩压低上前牙(直丝弓配合高位J钩组)。矫治前后拍摄全颌曲面断层片,分别测量两组治疗前后的上前牙牙根吸收等级。结果两组病例矫治后均有牙根吸收,两组治疗后牙根吸收等级差异有统计学意义(P<0.01);每组治疗前后的牙根吸收等级比较,差异有统计学意义(P<0.01)。结论在正畸治疗内收上前牙中配合高位J钩较易引起前牙的牙根吸收。

  20. Clinical Study on Orthodontic Treatment of Anterior Teeth Displacement Caused by Periodontal Disease%口腔正畸治疗牙周病致前牙移位的临床分析

    Institute of Scientific and Technical Information of China (English)

    王刚

    2016-01-01

    目的:对牙周病致前牙移位应用口腔正畸治疗的临床疗效进行分析研究。方法选取于2014年2月~2016年2月在我院接受治疗的牙周病致前牙移位患者94例,以上患者均接受口腔正畸治疗,对患者的临床资料和治疗资料进行回顾性分析。结果患者的各项临床症状均改善,治疗后出血指数低于治疗前,牙周袋深度浅于治疗前,前牙覆盖、前牙覆牙合均低于治疗前,t=9.85,6.88,7.52,6.23,差异具有统计学意义(P<0.05)。结论牙周病致前牙移位应用口腔正畸治疗的临床疗效理想。%Objective Orthodontic treatment effect for anterior teeth displacement caused by periodontal disease is to be investigated.MethodsReview and analyze clinical treatment data of selected 94 patients with anterior teeth displacement caused by periodontal disease that are given orthodontic treatment in our hospital from February 2014 to February 2016.Results Patients’clinical symptoms were improved much more favorable after treatment and patients’hemorrhage volume after treatment was much less than that before treatment. Besides,the value of PD (pocket depth) much lower after treatment and the probabilities of anterior overjet and anterior overbite after treatment are quite lower than those before treatment.there is a differential with treatment efficacy before and after treatment and such a differential has statistic value(P<0.05).Conclusion Orthodontic treatment is quite effective for anterior teeth displacement caused by periodontal disease.

  1. 铸瓷贴面在前牙美容修复中的临床效果观察%Observation on the effect of ceramic faced in the repair of anterior teeth beauty

    Institute of Scientific and Technical Information of China (English)

    陈艳青

    2013-01-01

    Objective To study the clinical effect of ceramic cover anterior on teeth beauty.Methods 138 teeth in 34 patients with dental fluorosis were divided into two groups,the control group (69 teeth in 16 patients) was given traditional PFM cover repair,the treatment group (69 teeth in 18 patients) was given ceramic cover,they were followed up for three years.The teeth remaining rate and patient satisfaction were compared,the match color,edge fit,healthy gums,restoration integrity were compared according to the Ryge standard.Results Teeth remaining rate in treatment group was 95.7%,which was significantly higher than control group (P < 0.05).The patient satisfaction was 94.4% in treatment group and 87.5% in the control group,the difference was significant (P < 0.05).The match color,edge coloring,healthy gums and teeth sensitivity were not different between the two groups (P > 0.05).The restoration integrity and marginal fit of treatment group was better than control group (P < 0.05).Conclusion The clinical effect of ceramic faced in the anterior teeth beauty repair,especially in the repair of dental fluorosis is remarkable,and the remaining teeth rate higher,repair,dental restoration integrity and marginal fit is significantly better than that of resin repair,patient satisfaction is higher,the water area from non-beryl popularization and application.%目的 研究铸瓷贴面在前牙美容修复中的临床效果.方法 将34例(138牙)氟斑牙患者随机分为两组,对照组16例(69牙)采用传统烤瓷贴面修复,治疗组18例(69牙)采用铸瓷贴面技术进行修复,随访3年,记录并比较两组患者的牙齿存留率及患者满意度,并采用改良Ryge标准对两组患者牙齿的颜色匹配、边缘密合度、牙龈健康、修复体完整度等指标进行评价.结果 3年后治疗组患者牙齿存留率为95.7%,明显高于对照组的89.9%,差异有统计学意义(P<0.05);治疗组患者满意度为94.4%,对照组为87

  2. Clinical Research of Strip Crowns in Restoration of Multi-Surface Caries Decay in Primary Anterior Teeth%透明成形冠在大面积龋损乳前牙修复中的应用

    Institute of Scientific and Technical Information of China (English)

    李永吉; 滕立群; 张英华; 于惠娟

    2011-01-01

    Objective To study the application of the strip crowns in restoration of multi-surface caries decay in primary anterior teeth. Methods Seventy-two patients with 174 multi-surface caries of primary anterior teeth were divided into group A ( control group, 86 cases), group B ( experimental group, 88 cases). Teeth were restored with composite resin in group A and strip crowns in group B, respectively. 6 months after therapy, restorations were re-examined at 6month and 18-month follow-up. Results 6-month retention rate was 96.51% for group A and 100% for group B, with no significant difference between two groups. 18-month retention rate was 67.44% for group A and 100% for group B,with significant difference (P u 0. 01 ) between two groups. Conclusion Strip crowns is a convenient and effective method to restore the multi-surface caries of primary anterior teeth.%目的 探讨应用Strip crowns透明成形冠对大面积龋损的乳前牙进行复合树脂全冠修复的效果.方法 72例174颗大面积龋损的乳前牙分为试验组和对照组.试验组88颗,应用Strip crowns透明成形冠进行复合树脂全冠修复;对照组86颗,用光固化复合树脂直接充填修复.经6个月、18个月随访观察修复体状态.结果 经6个月观察,修复体保存率试验组和对照组分别为100%、96.51%,两组间差异无统计学意义(P>0.05).经18个月观察,修复体保存率试验组和对照组分别为100%、67.44%,两组间差异有统计学意义(P<0.01).结论 应用Strip crowns透明成形冠对大面积龋损的乳前牙进行复合树脂全冠修复,其疗效可靠,明显优于复合树脂直接充填修复,具有良好的应用前景.

  3. 应用E-max铸瓷贴面修复效果的临床评价%Clinical evaluation of E-max ceramic veneers on restorations of anterior teeth

    Institute of Scientific and Technical Information of China (English)

    王瑞莉

    2012-01-01

    Objective To evaluate the effects of E-max ceramic veneers on restorations of anterior teeth.Methods One hundred and twenty-two teeth of 62 patients were treated with E-max ceramic veneers and the observation times were from 2 weeks to 24 months.The integrity,marginal adaptation,color of the prosthesis and the health of gingiva were observed.Results The success rate was 99% for E-max veneers and the marginal adaptation was good.There was one veneer cracked after 6 months restoration.Mild gingivitis occurred in 9 teeth after 2 weeks and got better then.9.8% of the teeth had little sensitivity at beginning and disappeared after 6 months.No secondary caries,and discoloring occurred and there was no significant color difference after restoration.Conclusion The E-max ceramic veneers were ideal for anterior teeth restoration which could acquire favorable aesthetic effects.%目的 评价E-max铸瓷贴面在前牙美容修复中的临床效果.方法 对62例患者的122颗患 牙进行E-max铸瓷贴面修复,于贴面粘接后2周及6、12、24个月复查.评价修复体完整度、边缘适合性、牙龈健康情况及修复体颜色等指标.结果 99%的贴面完整存在,且有良好的边缘适合度;1颗贴面切端有小缺损;2周复查时9颗修复体有牙龈炎症,后续复查明显改善;9.8%的牙齿有牙本质过敏症状,6个月以后症状消失.无继发龋、边缘变色及明显的颜色不调.结论 E-max铸瓷作为釉质的替代物是前牙较为理想的修复方法,并可获得良好的美学效果.

  4. Application of periradicular surgery in the treatment of anterior teeth periradicular diseases%应用根周外科手术方法治疗多个前牙根尖周病

    Institute of Scientific and Technical Information of China (English)

    章晓星; 范荣海

    2014-01-01

    Objective:To evaluate the effect of periradicular surgery in the treatment of anterior teeth periradicular diseases. Methods:Ten patients were selected for the study. After the periradicular surgery, all patients were followed up for 12 months and assessed for their treatment effects both clinically and radiographically. Results: The gingiva and epithelial attachment of these teeth returned to normal one month later after operation. Radiographically checking in the following up period of 3-12 months revealed that the periradicular bone became indistinguishable from the surrounding normal bone, which indicated the completion of bone regeneration. Conclusion:The periradicular surgery is an effective method in the treatment of anterior teeth periradicular diseases which can be performed in the department of stomatology of the community health service center.%目的:评价根周外科手术治疗多个前牙根周病的效果。方法:收集多个前牙根尖周病变患者10例,常规根周手术后随访,随访期限为完成治疗后的12个月,对患牙作临床与X线片评估,判断治疗效果。结果:术后1个月牙龈及上皮附着基本恢复正常。术后3~12个月复查X线片显示根周骨与周围正常骨已无明显区别,表明已有完全骨再生。结论:根周外科手术治疗多个前牙根周病的效果可靠,社区医院口腔科也可开展。

  5. 膜引导骨再生技术在上前牙即刻种植中的应用%Clinical application of membrane guided bone regeneration in immediate implant of upper anterior teeth

    Institute of Scientific and Technical Information of China (English)

    唐增斌; 韦惠平; 沈宁

    2013-01-01

    目的探讨膜引导骨再生技术在前牙拔除后即刻植入种植体修复牙缺失的可行性。方法对25例(32颗)前牙拔除术后患者,即刻植入种植体于骨缺损区,填入人工骨粉并用修复膜封闭,4~6个月行冠修复,通过临床观察和放射学检查分析修复效果。结果32颗种植体除1颗牙种植因感染失败外,其余种植体术后功能行使良好,冠修复后承载1年无松动。结论应用膜引导骨再生技术进行前牙即刻种植,解决了前牙拔除后唇侧骨缺损的不足,同时也缩短治疗疗程,获得满意效果。%Objective To investigate the feasibility of immediate implant fellowing extraction of anterior tooth with using membrane guided bone regeneration technique .Methods Thirty-two anterior teeth were pulled out from 25 patients in the surgery, and the immediate implants bone defect area was filled with artificial bone material . And then the barrier membrane was used to close it .After 4 to 6 months crown restoration were performed .The effects were evaluated through clinical observation and radiological examination .Results Among 32 implants there was only one tooth failed due to infection, the other function was well after implant surgery .After the crown restoration it was carried one year without any loose.Conclusion By the membrane guided bone regeneration technique the immediate implant of anterior teeth can be conducted which resolves the bone defect of lip side after the anterior teeth is pulled out.The result of immediately implant placement can reduce the treatment period so as to achieve satisfying effect.

  6. 重度前牙牙酸蚀症的临床治疗体会%Severe Anterior Teeth Etched Clinical Treatment

    Institute of Scientific and Technical Information of China (English)

    夏海霞

    2013-01-01

    牙酸蚀症是较长时间接触各种酸雾或酸酐所引起的牙体硬组织脱钙缺损的非龋性疾病。是生产和使用酸的工人的一种较常见口腔职业病。近几十年来,饮食习惯导致的酸蚀症上升,随着碳酸类饮料的饮用量增加及时间的延长,临床上出现了非职业性牙酸蚀症。碳酸类饮料pH值常低于5.5,但长期饮用、摄入量多且频率高又不注意防护的情况下,也会造成累积性的酸蚀作用。前牙位于固有口腔前端,酸蚀程度较后牙严重。酸蚀牙易引起牙敏感酸痛,牙面缺损影响美观。%Teeth acid scarification disease is of tooth hard tissue defects of decalcified dental caries disease. Is one of the workers in the production and use acid is common oral disease.In recent decades,a non professional teeth acid scarification disease clinical y. Carbonated beverage pH less than 5.5,but long-term consumption, intake of high frequency more and can also cause cumulative erosion of acid. Front teeth in the oral front-end,teeth after severe degree of acid erosion.Acid corrosion teeth easy cause tooth sensitivity to pain,tooth surface defects af ect beautiful.

  7. 桩核冠在前牙美容性修复中的临床应用%Clinical application of post-core crown in anterior teeth aesthetical restoration

    Institute of Scientific and Technical Information of China (English)

    陈勃; 郑春玉; 刘建军; 方继荣; 杨玲

    2010-01-01

    Objective To investigate the clinical status of post-core crown in anterior teeth aesthetical restoration and to observe its effect. Methods 126 cases of anterior teeth in patients with mild deformity,restored with post-core crown after informed consent meanwhile conducted clinical follow-up observation. Results In addition to 2 cases of disease after root canal treatment, 1 incisal and labial surface of porcelain fracture, other cases achieved desired results in the way of self-satisfaction,clinical efficacy and x-ray observation and periapical films. Conclusion Post-core crown in anterior aesthetical restoration has a unique position and clinical efficacy.%目的 探讨桩核冠在前牙美容性修复治疗中的临床地位,并观察其疗效.方法 对126例前牙区轻度畸形的患者,在知情同意的情况下行桩核冠修复,并进行临床随访观察.结果 除2例发生根管治疗后疾病,1例切端及唇面崩瓷以外,其他病例在自我满意度、临床效果及X线根尖片观察等方面均达到理想预期效果.结论 桩核冠修复技术在前牙美容性修复治疗中有独特的临床地位和疗效.

  8. The management of congenital malpositions of eyelids, eyes and orbits.

    Science.gov (United States)

    Morax, S; Hurbli, T

    1988-01-01

    Congenital malformations of the eye and its adnexa which are multiple and varied can affect the whole eyeball or any part of it, as well as the orbit, eyelids, lacrimal ducts, extra-ocular muscles and conjunctiva. A classification of these malformations is presented together with the general principles of treatment, age of operating and surgical tactics. The authors give some examples of the anatomo-clinical forms, eyelid malformations such as entropion, ectropion, ptosis, levator eyelid retraction, medial canthus malposition, congenital eyelid colobomas, and congenital orbital abnormalities (Craniofacial stenosis, orbital plagiocephalies, hypertelorism, anophthalmos, microphthalmos and cryptophthalmos).

  9. 透明成形冠在乳前牙美容修复中的应用效果%Application effect of strip crowns in cosmetic restoration of primary anterior teeth

    Institute of Scientific and Technical Information of China (English)

    李文敏; 秦帅华; 闫长山

    2016-01-01

    目的:观察使用透明成形冠对乳前牙大面积缺损进行复合树脂全冠修复的临床效果,并与直接树脂充填法进行对比。方法:选择上颌乳前牙牙体大面积缺损的患儿68例(152颗牙),随机分为两组。实验组:76颗牙,应用透明成形冠技术进行复合树脂全冠修复;对照组:76颗牙,去腐后采用复合树脂直接充填。分别于充填后6个月、18个月复查修复体保存情况,并从边缘密合性、边缘着色、表面质地、继发龋等方面比较两组修复效果。结果:充填后18个月复查,实验组在保存率、边缘密合性、边缘着色、继发龋四项指标上均优于对照组,差异有统计学意义(P<0.05),实验组在表面质地的成功率也高于对照组。结论:使用成形冠技术修复乳前牙大面积缺损,可有效提高修复体保存率,恢复牙体形态和功能,值得临床推广应用。%Objective To observe the clinical effect of restoration of multi-surface caries decay in primary anterior teeth with strip crowns, and to compare the method of direct resin iflling method.Methods Maxillary primary anterior teeth with multi-surface caries in children with 68 cases 152 teeth, were randomly divided into for two groups: the experimental group 76 teeth, which were restored with strip crowns; the control group 76 teeth, which were restored directly with the composite resin after getting rid of decay. After therapy,restorations were re-examined at 6-month and at 18-month follow-up respectively, at the same time, the restoration effects of the two groups were compared in the aspects of edge sealing, edge coloring, surface texture and secondary caries etc.ResultsAfter eighteen months following up,4 indicators(retention rate,edge sealing,edge coloring and secondary caries)in experimental group are better than those in control group, results there was a signiifcant difference in those ifve indicators between the two

  10. The clinical study of vacuum-formed jaw-pillow used for teeth fixing in children with traumatic anterior teeth%全牙列牙合垫用于混合牙列期儿童上颌外伤前牙固定

    Institute of Scientific and Technical Information of China (English)

    张辉伟; 李雅; 张峥

    2014-01-01

    目的:评价全牙列牙合垫用于儿童外伤前牙固定的临床效果。方法:选择58例7~12岁儿童,其中男42例,女16例,随机分为两组,实验组(30例)采用全牙列颌垫固定,对照组(28例)采用弓丝托槽技术固定。比较治疗前及固定4周后的牙松动度、患者舒适指数、牙龈指数和医生临床操作时间,并进行统计学分析。结果:外伤牙固定4周后,疗效差异无统计学意义(P>0.05);患者舒适指数、牙龈指数、临床操作时间全牙列牙合垫优于弓丝托槽(P<0.05)。结论:全牙列牙合垫用于混合牙列期儿童外伤前牙固定效果可靠,且较舒适,对牙周刺激小,可节省时间。%AIM:To evaluate the clinical effects of vacuum-formed jaw-pillow used for teeth fixing in chil-dren with traumatic anterior teeth.METHODS:58 cases of children (42 males and 16 females aged 7 -12 years) with anterior teeth trauma were randomly divided into 2 groups,and respectively treated by vacuum-formed jaw-pillow (30 cases)and arc wire (28 cases).The clinical operation time,tooth mobility,patient comfort index and gingival index were compared between the 2 groups before and 4 weeks after treatment .Tata were statistically analyzed.RE-SULTS:The efficacy between the 2 groups was not statistically different (P>0.05);the comfort index,gingival in-dex and clinical operation time of vacuum-formed jaw-pillow group were obviously better than those of control group (P<0.05).CONCLUSION:Vacuum-formed jaw-pillow used for teeth fixing in children with traumatic anterior is superior to arc wire .

  11. 不同排龈线方法用于前牙固定修复临床效果比较%Comparison of clinical effects of different kinds of gingival retraction technique in treatment of anterior teeth restoration

    Institute of Scientific and Technical Information of China (English)

    郑敏; 王晖; 周铨

    2016-01-01

    Objective To compare the clinical effects of four kinds of gingival retraction technique in treat-ment of anterior teeth restoration.Methods 169 patients for 352 teeth with tooth body and tooth dentition defect by anterior crown bridge repair were chosen and divided into 4 group by patients'order,including A group(88cases)with single track method,B group(91cases)with single line for two times method,C group(89cases)with double line method and D group(94cases)with double line for two times method.And the fixed restoration satisfaction rate of anterior teeth of both groups was compared.Results The satisfaction rates of gums,shoulder,impression,model and restoration of A group were 73.9%,70.1%,69.3%,65.9%,61.4% respectively,which of B group were 83.5%, 80.2%,80.2%,80.2%,76.9%;which of C group were 84.3%,80.9%,78.7%,77.5%,76.4%;which of D group were 94.6%,93.6%,92.6%,92.6%,90.4%.There were no significant differences in the fixed restoration satisfaction rate of anterior teeth between B group and C group(χ2 =2.43,1.17,2.85,3.04,2.30,all P >0.05). The fixed restoration satisfaction rate of anterior teeth of D group were significantly better than A,B and C groups (χ2 =14.90,16.39,15.83,19.87,21.38,all P <0.05 ).Conclusion Double line for two times method in the treatment of anterior teeth restoration can efficiently avoid ree gingival damage in the situation with abutment shoulder preparation,improve the quality of preparation,impression and model,and are helpful to higher the fitness of the neck of anterior teeth fixed restorations.%目的:探讨四种不同排龈线方法用于前牙固定修复临床效果。方法选取需行上前牙冠桥修复牙体、牙列缺损患者共169例牙352颗,依据治疗意愿分为 A(88例)、B(91例)、C(89例)及 D(94例)四组,分别采用单线一次法、单线二次法、双线一次法及双线二次法进行排龈治疗,并对四组患者前牙固定修复满意率进行比较。结果A 组牙龈、

  12. 牙周病患者前牙即刻种植的临床研究:成功因素和风险分析%Anterior teeth immediate implant of periodontitis patient:survival and risk factors

    Institute of Scientific and Technical Information of China (English)

    滕立钊; 杨小东; 吴大怡

    2014-01-01

    目的:通过对牙周病患者前牙的即刻种植临床研究,探讨牙周病患者前牙即刻种植的成功及风险因素。方法:对186名患者进行拔牙后即刻种植。所有患者都有轻度至中度的牙周病且均要求即刻种植治疗。种植术前患者均进行了牙周的基础治疗。最长临床跟踪随访5年。通过临床和放射的角度评估即刻种植的治疗效果。结果:自2007-2012年,186名牙周病患者超过500枚CDIC或replace种植体即刻植入拔牙窝,种植体存留率达到95.1%。接近80%的种植体松动发生在种植术后的六个月以内。结论:牙周病患者前牙的即刻种植较延期种植风险更大。上颌前牙即刻种植风险高于下颌。感染是失败的主要原因。根据患者的全身和局部条件合理选择手术时机和手术方式能有效控制失败风险。%Objective:The purpose of this clinical study on periodontal patients with anterior immediate im-plant was to discuss the survival and risk factors, which affect anterior teeth immediate implant of peri-odontitis patient. Methods: In this study 186 patients were be operated with anterior teeth immediate implant. All the patient had moderate chronic periodontitis and required immediate implant therapy. Before the operation of implant, the patients received the basic periodontal therapy. The longest clinical followed-up were for 5 years. Clinical results of treatment were evaluated from clinical and radiographic standpoint. Results: More than 500 dental implants of 186 patients were placed in the sockets that the anterior teeth were extracted immediately from 2007 to 2012. The survival rate of immediate implant in periodontitis patient was 95.1% during 5 years. Nearly 80% of implant loosing happened during the first 6 months after the operation of implant. Conclusion: Anterior teeth immediate implant of peri-odontitis patient had higher risk than delay implant of periodontitis patient. Immediate

  13. Stability of the anterior maxillary segment and teeth after segmental le fort I osteotomy and postoperative skeletal elastic fixation with or without occlusal splint

    DEFF Research Database (Denmark)

    Blæhr, Tue Lindberg; Jensen, Thomas; Due, Karen Margrethe;

    2014-01-01

    OBJECTIVES: To assess the short term dental and skeletal stability of the anterior maxillary segment after segmental Le Fort I osteotomy with postoperative skeletal elastic fixation with or without occlusal splint. MATERIAL AND METHODS: 29 consecutive patients underwent segmental Le Fort I.......83 to 1.69°). There was no statistically significant difference in stability between the two groups at the P value 0.05. CONCLUSIONS: The skeletal anterior fixation with postoperative elastics for eight weeks may not compromise the early postoperative dental and skeletal stability of the anterior segment...... osteotomy and elastic skeletal fixation was applied. Patients were divided into two groups according to whether a fixed occlusal splint was used for six weeks (group A) or dismounted perioperatively (group B). Changes in landmarks and reference planes between the two timepoints were estimated on lateral...

  14. Changes in alveolar bone height due to retraction of anterior teeth in adult patients%成人前牙内收前后切牙牙槽骨高度变化的研究

    Institute of Scientific and Technical Information of China (English)

    林薇薇; 陈金武

    2014-01-01

    Objective:To investigate the alveolar bone height change before and after retraction of anterior teeth in adult patients. Methods:A total of 15 adult patients with angle class I bimaxillary protrusion had 4 first premolars extracted followed by othodontic treatment for retraction of anterior teeth with straight arch wire techniques.Cone beam computed tomography(CBCT)scans were made before and 3 months after retraction.The labial and the lingual alveolar bone height around central and lateral incisors was measured and analyzed before and after treatment.Results:Significant increase of labial alveolar bone height around anterior teeth was found in both maxilla and mandible(P <0.05),however,lingual alveolar bone height was decreased(P <0.05).Conclusion:For bimaxillary protrusion patients,the lingual alveolar bone height decreased due to obvious incisors retraction in adults which should be considered carefully in orthodontic clinic.%目的:研究成人双颌前突患者前牙内收前后切牙区唇侧、舌侧牙槽骨高度的变化。方法:选取双颌前突成人患者15例,治疗需拔除4颗第一前磨牙行前牙内收,内收前后分别拍摄 CBCT 片,对其上、下颌8颗切牙唇舌侧牙槽骨高度进行测量和对比分析。结果:上、下颌切牙内收后唇侧牙槽骨高度均有不同程度升高,以下颌更为显著(P <0.05),舌侧牙槽骨高度降低(P <0.05)。结论:成人双颌前突患者切牙行大范围舌向移动时舌侧牙槽骨高度降低,临床治疗中应予以关注。

  15. 全瓷牙在前牙美容修复中的应用体会%Clinical experience with the application of all-ceramic dental restoration of anterior teeth beauty

    Institute of Scientific and Technical Information of China (English)

    朱芒

    2014-01-01

    Objective Cosmetic restoration of anterior teeth in the clinical effects of the application of porcelain teeth, Summarize the clinical experience Methods Our hospital in January 2012 to June 2012 Anterior tooth of 56 patients for the study, 28 cases were randomly selected as a control group, another 28 cases as the observation group and control group patients metal alloy porcelain repair, observe group of patients with all - ceramic dental restoration, repair effect two groups were compared. Results After the restoration of the two groups of patients overall appearance, countenance improve aspects of color and shape, psychological improvement prostheses were significant differences ( <0.05); incidence of periodontitis and gingivitis patients in the observation group were significantly lower in the control group ( <0.05). Conclusion Anterior tooth application of porcelain teeth can achieve the desired aesthetic effect, and higher security, significant clinical value.%目的:探讨前牙美容修复中应用全瓷牙的临床效果。方法:选取我院收治的56例行前牙美容修复治疗的患者,从中随机抽取28例作为对照组,另28例作为观察组,对照组患者采用金属合金烤瓷修复,观察组患者则采用全瓷牙修复,并对两组患者的修复效果进行比较。结果:两组患者修复后其整体美观、面容改善、修复体色泽及外形、心理改善等方面比较,均有较大的差异(P<0.05),有统计学意义;且观察组患者的牙周炎及牙龈炎发病率均显著低于对照组(P<0.05)。结论:采用全瓷牙进行前牙美容修复可取得理想的美学效果,且安全性较高,其临床价值显著,应予广泛应用。

  16. Embryo malposition as a potential mechanism for mercury-induced hatching failure in bird eggs

    Science.gov (United States)

    Herring, G.; Ackerman, J.T.; Eagles-Smith, C. A.

    2010-01-01

    We examined the prevalence of embryo malpositions and deformities in relation to total mercury (THg) and selenium (Se) concentrations in American avocet (Recurvirostra americana), black-necked stilt (Himantopus mexicanus), and Forster's tern (Sterna forsteri) eggs in San Francisco Bay (CA, USA) during 2005 to 2007. Overall, 11% of embryos were malpositioned in eggs ???18 d of age (n=282) and 2% of embryos were deformed in eggs ???13 d of age (n=470). Considering only those eggs that failed to hatch (n=62), malpositions occurred in 24% of eggs ???18 d of age and deformities occurred in 7% of eggs ???13 d of age. The probability of an embryo being malpositioned increased with egg THg concentrations in Forster's terns, but not in avocets or stilts. The probability of embryo deformity was not related to egg THg concentrations in any species. Using a reduced dataset with both Se and THg concentrations measured in eggs (n=87), we found no interaction between Se and THg on the probability of an embryo being malpositioned or deformed. Results of the present study indicate that embryo malpositions were prevalent in waterbird eggs that failed to hatch and the likelihood of an embryo being malpositioned increased with egg THg concentrations in Forster's terns. We hypothesize that malpositioning of avian embryos may be one reason for mercury-related hatching failure that occurs late in incubation, but further research is needed to elucidate this potential mechanism. ?? 2010 SETAC.

  17. Treatment of malpositioned periodontally compromised teeth by an interdisciplinary approach - A case report

    Directory of Open Access Journals (Sweden)

    Sonali Deshmukh

    2009-01-01

    Full Text Available The traditional orthodontic patient-base of adolescents has changed dramatically over the last 20 years. Adult patients now comprise a very large percentage of the orthodontic patient base. These patients bring with them unique challenges to the provision of aesthetic treatment. Gingival aesthetics, for a long time the exclusive concern of the periodontist, has now become one of the chief aesthetic challenges presented to the practicing orthodontist. This report illustrates the interdisciplinary approach in a patient requiring periodontic, orthodontic and prosthodontic treatment.

  18. Perawatan Ortodontik Gigi Anterior Berjejal dengan Tulang Alveolar yang Tipis

    Directory of Open Access Journals (Sweden)

    Miesje K. Purwanegara

    2015-09-01

    Full Text Available Anterior teeth movement in orthodontic treatment is limited to labiolingual direction by very thin alveolar bone. An uncontrolled anterior tooth movement to labiolingual direction can cause alveolar bone perforation at its root segment. This case report is to remind us that alveolar bone thickness limits orthodontc tooth movement. A case of crowded anterior teeth with thin alveolar bone in malocclusion I is reported. This case is treated using adgewise orthodontic appliance. Protraction of anterior teeth is anticipated due to thin alveolar bone on the anterior surface. The conclusion is although the alveolar bone surrounding the crowded anterior teeth is thin, by controlling the movement the teeth reposition is allowed.

  19. The Measurement and Analysis on the Arranging of Maxillary Anterior Teeth of Dentulous and Edentulous Jaws%上颌天然牙列与全口义齿前牙排列位置的测量分析

    Institute of Scientific and Technical Information of China (English)

    杜斌; 白乐康; 李峥

    2014-01-01

    Objective :To evaluate the relationship between the incisive papilla and maxillary anterior teeth of dentulous and edentulous jaws ,in order to give some clinical guidance for teeth arrangement of complete denture .Methods :Selec-ting 60 adult maxillary dentulous casts with normal occlusion ,and 57 upper complete denture models of edentulous pa-tients repaired in our stomatological hospital .The relationship between incisive papilla and maxillary anterior teeth were measured ,including the distance between incisor and papilla (IEP) ,intercanine line and papilla (Dip-c ) .All data were input into SPSS14 .0 system and were analyzed with statistic analysis between different groups and sex .Results:In the dentulous group ,the average IEP distance was (8 .96 ± 1 .24)mm and the average Dip-cdistance was (-0 .20 ± 1.12) mm .In the edentulous group ,The average IEP distance was (6 .33 ± 2 .02)mm and the average Dip-c distance was (2.19 ± 1 .31)mm .No difference was found for different sex in each group (P>0 .05) .The distances between the two groups had significant differences (P<0 .05) .Conclusion:The relationship between incisive papilla and maxillary anterior teeth was constant in the dentulous group .But these values are less for artificial teeth than natural dentitions .%目的:调研上颌全口义齿前牙排列位置的现状,以指导临床工作。方法:为60例天然牙列人群及57例上颌总义齿患者制取上颌牙列模型,各组按性别分别测量切牙乳突中点到1|1唇面距离(IEP)、到3|3牙尖连线距离(Dip-c ),并将测量结果用SPSS14.0软件统计分析。结果:60例天然牙列测量结果:IEP为(8.96±1.24)mm ,Dip-c为(-0.20±1.12)mm ;57例上颌全口义齿测量结果:IEP为(6.33±2.02)mm ,Dip-c为(2.19±1.31)mm ,两组内所测数据无性别间差异,但两组间存在显著差异。结论:天然牙列中上颌前牙与切牙乳突存在较恒定的

  20. Root resorption after orthodontic treatment : a study of age factor and prevalence in anterior teeth%正畸前牙牙根吸收的年龄因素及好发牙位的探讨

    Institute of Scientific and Technical Information of China (English)

    田玉楼; 王坤; 王晶; 刘芳; 朴美玲

    2013-01-01

    PURPOSE: To investigate the impact of age factor on root resorption and the prevalence in anterior teeth during orthodontic treatment. METHODS: Sixty extraction cases treated with straight wire appliance were divided into adult group and child group, with 30 cases in each group.The panoramic radiographs pre-treatment and post梩reatment were examined to measure the degrees of root resorption. A total of 360 anterior teeth in each group were evaluated- SPSS 13.0 software package was applied to perform statistical analysis. RESULTS: There was significant difference in root resorption index before and after treatment(P<0.01). The incidence of root resorption increased remarkably after orthodontic treatment There was significant difference in the degree of root resorption in two groups (P<0.01). The prevalence of root resorption in anterior teeth was: upper central incisors, upper lateral incisors, lower central incisors, lower lateral incisors, upper canines and lower canines. CONCLUSIONS: The root resorption in adult patients are more obvious than child patients. The prevalence of root resorption in anterior teeth is different. Moderate or severe root resorption is prone to happen in upper central incisors or lateral incisors in adult patients.%目的:探讨年龄因素对正畸治疗引起牙根吸收的影响及在前牙中的好发牙位,以供临床参考.方法:选择60例拔牙后经直丝弓矫治完成的病例,分为成人组与儿童组,每组各30例.以上、下颌前牙作为研究对象,每组各360颗牙.应用全颌曲面体层片,研究正畸治疗后牙根吸收情况,采用SPSS 13.0软件包对结果进行统计学分析.结果:60例患者正畸治疗前、后牙根吸收指数改变均有统计学意义(P<0.01),正畸治疗后牙根吸收发生率明显升高;成人组与儿童组牙根吸收等级比较有显著差异(P<0.01).上、下前牙各牙位牙根吸收好发顺序是上颌中切牙、上颌侧切牙、下颌中切牙、下颌侧切

  1. 上颌埋伏前牙正畸治疗时机的初步探讨%A primary study of orthodontic treatment timing for embedded upper anterior teeth

    Institute of Scientific and Technical Information of China (English)

    王君香; 苏奇志; 王秀婧

    2013-01-01

    Objective To explore the treatment timing for embeddedupper anterior teeth.Methods 20 impacted upper anterior tcethwith ectopic eruption pathway or dilacerated root from 17 orthodontic patients were selected and X-ray films were taken to determine their position.After creating space by expansion,the teeth were treated with closed eruption techniques before their root development finish.The relative lengths of root were measured after treatment for the impacted teeth and their contralateral teeth.PES index was used to evaluate the gingival soft tissue esthetics.Results Treatments for all the 20 teethwere successful.The mean root lengths for central incisor,lateral incisor and canine were (18.00±2.79) mm、(15.75±1.06) mm and (21.88±2.32) mm respectively,which were slightly shorter than that ofthe contralateral teeth [(20.25 ± 1.66) mm,(18.00±1.41) mm and (23.5±2.58) mm].The mean PES score was 10.65±2.68.Conclusions Closed eruption technique is suitable to treat embedded teeth with ectopic eruption pathway or dilacerated root before root development finish.%目的 探讨上颌埋伏前牙正畸治疗的时机.方法 对17例20颗萌出道异常或牙根弯曲的上颌埋伏前牙摄片定位、拓展间隙后,在牙根未发育完成前进行闭合式牵引,治疗后测量埋伏牙和对侧同名牙牙根的相对长度,并采用PES(the pink esthetic score)指数对牵引后的埋伏牙进行牙龈软组织美学评价.结果 20颗埋伏前牙均牵引成功,牵引后中切牙、侧切牙和尖牙的牙根平均长度分别为(18.00±2.79) mm、(15.75±1.06) mm和(21.88±2.32) mm,略短于对侧同名牙[中切牙(20.25±1.56) mm、侧切牙(18.00±1.41) mm、尖牙(23.5±2.58) mm],牙龈软组织美学评分平均为10.65±2.68.结论 对某些萌出方向异常或牙根弯曲的埋伏牙在牙根未发育完成前进行闭合式开窗和正畸牵引可获得较好的治疗效果.

  2. Clinical observation of the metal-ceramic crowns with shoulder porcelain of anterior teeth%肩台瓷金瓷冠在前牙修复中的临床效果观察

    Institute of Scientific and Technical Information of China (English)

    唐颖; 袁剑鸣; 潘峰

    2013-01-01

      Objective To observe the prosthetic effects of the metal-ceramic crowns with shoulder porcelain of anterior teeth clinically. Methods Forty-two units of metal-ceramic crowns with shoulder porcelain, forty-four u-nits Ni-Cr based porcelain-fuse-metal crowns were observed after one year through clinical methods. Results There were some differences between the two groups in color match, contour, marginal integrity and health of gum. But the difference between the two groups had no statistic significance. The differences of marginal integrity and marginal discoloration between metal-ceramic crowns with shoulder porcelain and Ni-Cr based porcelain-fuse-metal crowns had high statistic significance. Conclusion Using metal-ceramic crowns with shoulder porcelain could progress the esthetics in anterior teeth.%  目的分析肩台瓷金瓷冠在前牙修复中的临床效果。方法根据纳入标准分别对42颗肩台瓷金瓷冠、44颗镍铬合金烤瓷冠修复1年后的临床效果进行观察对比,评价其结果。结果2组间在颜色、外形、边缘密合性、牙龈健康方面有差异但无统计学意义。在牙龈灰线、边缘变色方面有差异,且差异有统计学意义。结论肩台瓷金瓷冠在前牙修复中有较好的美观效果。

  3. Stability of the anterior maxillary segment and teeth after segmental Le Fort I osteotomy and postoperative skeletal elastic fixation with or without occlusal splint

    OpenAIRE

    2015-01-01

    ABSTRACT Objectives To assess the short term dental and skeletal stability of the anterior maxillary segment after segmental Le Fort I osteotomy with postoperative skeletal elastic fixation with or without occlusal splint. Material and Methods 29 consecutive patients underwent segmental Le Fort I osteotomy and elastic skeletal fixation was applied. Patients were divided into two groups according to whether a fixed occlusal splint was used for six weeks (group A) or dismounted perioperatively ...

  4. Stability of the Anterior Maxillary Segment and Teeth after Segmental Le Fort I Osteotomy and Postoperative Skeletal Elastic Fixation With or Without Occlusal Splint

    Directory of Open Access Journals (Sweden)

    Tue Lindberg

    2014-10-01

    Full Text Available Objectives: To assess the short term dental and skeletal stability of the anterior maxillary segment after segmental Le Fort I osteotomy with postoperative skeletal elastic fixation with or without occlusal splint. Material and Methods: 29 consecutive patients underwent segmental Le Fort I osteotomy and elastic skeletal fixation was applied. Patients were divided into two groups according to whether a fixed occlusal splint was used for six weeks (group A or dismounted perioperatively (group B. Changes in landmarks and reference planes between the two timepoints were estimated on lateral cephalometric radiographs. Results: Group A: The upper incisor had a mean intrusion of -0.56 mm (SD 0.77; range -2.04 to 1.08 mm and a mean posterior movement of -0.93 mm (SD 1.03; range -2.52 to 0.96 mm. The mean change in the axial inclination of the upper incisor was -0.33° (SD 2.56; range -6° to 4° (95% CI: -1.75 to 1.08°. Group B: The upper incisor had a mean intrusion of -0.13 mm (SD 1.36; range -1.92 to 3.6 mm and a mean anterior movement of 0.11 mm (SD 1.78; range -2.88 to 3.84 mm. The mean change in the axial inclination of the upper incisor was -0.07° (SD 3.05; range -5° to 5° (95% CI: -1.83 to 1.69°. There was no statistically significant difference in stability between the two groups at the P value 0.05. Conclusions: The skeletal anterior fixation with postoperative elastics for eight weeks may not compromise the early postoperative dental and skeletal stability of the anterior segment in segmental Le Fort I osteotomy.

  5. Evaluation of porcelain laminate veneer on aesthetic restoration of anterior teeth%全瓷贴面在前牙美容修复中的疗效观察

    Institute of Scientific and Technical Information of China (English)

    邓薇; 杨永进; 蔡兴伟; 李涛; 张娜; 王亚锋

    2015-01-01

    目的:探讨全瓷贴面在前牙美容修复中的疗效。方法:选择97颗前牙,全瓷贴面修复,并进行2年的随访,采用美国公共健康协会的修正标准进行评价分析。结果:97颗全瓷贴面在修复完成后6个月,六项评价指标均达到A级;修复完成后1年,修复体周围龋:2颗达到B级;修复完成后2年,2例患者(3颗牙)失访,修复体周围龋:2颗B级、1颗C级,修复体折断:1颗B级,基牙松动:2颗B级。结论:全瓷贴面在前牙美学修复中的临床效果是非常理想的。%Objective:To evaluate the clinical effect of porcelain laminate veneer in the aesthetic restoration of anterior teeth.Methods:97 porcelain laminate veneers were fabricated, and evaluated in 2 year follow up appointments. The restorations were examined with a modified USPHS criteria.Results:All 97 porcelain laminate veneers achieved class A six months after treatment. Two porcelain laminate veneers were classified as class B for secondary caries 1 year after treat-ment. Three veneers of 2 patients missed 2-year follow up examination. Two veneers were classified as class B, and one ve-neer classified as class C due to secondary caries; one veneer was classified as class B due to fracture; two veneers were classified as class B due to mobility of abutment teeth.Conclusion:Porcelain laminate veneer is an optimal method in aes-thetic restoration of anterior teeth.

  6. 牙冠延长术用于前牙修复再治疗的疗效分析%Clinic effects of crown lengthening in the re-therapy for anterior teeth restoration

    Institute of Scientific and Technical Information of China (English)

    桂盠; 唐丽琴; 冯琛琛

    2014-01-01

    目的:评价牙冠延长术应用于前牙修复再治疗的疗效。方法:选择因前牙烤瓷修复后牙龈肿胀出血,要求重新修复治疗的患者45例(72个前牙)。基线检查后,拆除原有烤瓷冠,完善根管治疗及牙周基础治疗,然后行牙冠延长术。术后8周行永久性修复并进行牙周检查;术后8周、6个月、1、2年复诊,分别记录出血指数和探诊深度,并进行疗效分析。结果:术后各时间点牙周指数分别与术前相比,数值下降差异有统计学意义(P<0.05);各时间点牙周指数之间相比,差异无统计学意义(P>0.05)。术后6个月、1、2年有效率分别与术后8周相比无统计学差异(P>0.05),8周后各时间点有效率无统计学差异(P>0.05)。结论:牙冠延长术用于前牙修复再治疗疗效良好。%AIM:To evaluate the clinical effects of surgical crown lengthening in the re-treatment of anteri-or teeth restoration.METHODS:45 patients complaining of gum edema after anterior teeth restoration (72 teeth) were included.After baseline examination,the previous ceramic crowns were removed,root canal therapy and perio-dontal therapy were done as indicated.Then,surgical crown lengthening was performed.8 weeks after crown lengthe-ning,permanent restorations were made.Sulcus bleeding index (SBI)and probing depth (PD)were recorded at 8week,6month,1year and 2 year follow-up.RESULTS:Significantly lower values of SBI and PD were found at all time points post crown lengthening as compared with that of pre-surgery (P0.05 ).CONCLUSION:Surgical crown lengthening is an effective method for the re-therapy of anterior teeth restoration.

  7. Z350纳米树脂在前牙美容修复中的临床效果观察%Clinical effects of Z350 nano resin in the anterior teeth beauty and repair

    Institute of Scientific and Technical Information of China (English)

    唐碧茹; 马慕兰

    2016-01-01

    目的:探讨Z350纳米树脂在前牙美容修复中的临床效果。方法收集2014年1月~2015年5月期间我院收治的共150例患者(150颗)牙进行美容修复治疗,按照随机数字表法分为观察组和和对照组,观察组共75例75颗牙,用Z350纳米树脂进行前牙美容修复,对照组共75例75颗牙,用光固化树脂材料对牙齿进行美容修复。比较两组临床疗效、满意度。结果与对照组比较,观察组优良率明显较高,两组差异有统计学意义(P<0.05)。与对照组比较,观察组在色泽修复、外形美观、面容改善及心理状况改善等方面的满意度评分均明显较高,两组差异有统计学意义(P<0.05)。结论 Z350纳米树脂进行前牙美容修复效果较好,患者满意度高,更易于接受,可在临床推广应用。%Objective To investigate the clinical effect of Z350 nano resin in the anterior teeth beauty and repair. Methods 150 patients(150 teeth)for cosmetic dental restorative were collected from January 2014 to May 2015 in our hospital,according to a random number table,all the patients were divided into the observation group and the control group,a total of 75 cases(75 teeth)in the the observation group and all of them were treated with resin Z350 nano Anterior Tooth,a total of 75 cases(75 teeth)in the control group and all of them were treated with photo-curable resin material for cosmetic dental restoration.The clinical efficacy,satisfaction of two groups were compared. Results The Excellent rate of the observation group was significantly higher compared with control group,the difference was statistically significant(P < 0.05).The color restoration,appearance,face to improve and improve mental condition and other aspects of satisfaction scores of the observation group were significantly higher compared with the control group,the difference was statistically significant(P < 0.05). Conclusion The clinical effect of Z350

  8. Proportional Smile Design: Using the Recurring Esthetic Dental Proportion to Correlate the Widths and Lengths of the Maxillary Anterior Teeth with the Size of the Face.

    Science.gov (United States)

    Ward, Daniel H

    2015-07-01

    Proportional smile design is a useful tool for evaluating and designing smiles that are in harmony with the face. Although not always observed in nature, the recurring esthetic dental proportion is preferred by dentists surveyed to the width proportions observed in nature with normal-length teeth. The width/length ratio of the central incisor is a key determinant in providing a smile that is pleasing to dentists. Using the desired tooth length while maintaining the preferred 78% width/length ratio of the central incisor in conjunction with the recommended recurring esthetic dental proportion is a good method for designing a smile balanced with the face. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. Stability of the anterior maxillary segment and teeth after segmental le fort I osteotomy and postoperative skeletal elastic fixation with or without occlusal splint

    DEFF Research Database (Denmark)

    Blæhr, Tue Lindberg; Jensen, Thomas; Due, Karen Margrethe

    2014-01-01

    OBJECTIVES: To assess the short term dental and skeletal stability of the anterior maxillary segment after segmental Le Fort I osteotomy with postoperative skeletal elastic fixation with or without occlusal splint. MATERIAL AND METHODS: 29 consecutive patients underwent segmental Le Fort I...... osteotomy and elastic skeletal fixation was applied. Patients were divided into two groups according to whether a fixed occlusal splint was used for six weeks (group A) or dismounted perioperatively (group B). Changes in landmarks and reference planes between the two timepoints were estimated on lateral...... in segmental Le Fort I osteotomy....

  10. Tratamento conservador de uma má oclusão Classe I de Angle, com atresia maxilar e apinhamento anterior The conservative treatment of Class I malocclusion with maxillary transverse deficiency and anterior teeth crowding

    Directory of Open Access Journals (Sweden)

    Lincoln I. Nojima

    2011-10-01

    Full Text Available Este artigo relata o tratamento de uma paciente do sexo feminino, com 15 anos de idade, má oclusão Classe I de Angle, severo apinhamento anterossuperior, desvio da linha média superior para o lado esquerdo e atresia maxilar, associada à mordida cruzada posterior. Os procedimentos executados envolveram a expansão maxilar com disjuntor palatino do tipo Haas modificado e montagem de aparelho fixo com sistema Edgewise standard. Foram realizados desgastes proximais nos incisivos e caninos inferiores para o alinhamento anterior, bem como redução da discrepância de Bolton com excesso inferior. Esse caso foi apresentado à diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria livre escolha, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.This article reports the treatment of a 15-years-old female patient, with Class I malocclusion, severe upper anterior crowding, midline deviation to the left side and maxillary transverse deficiency associated with posterior crossbite. The procedures involved rapid maxillary expansion with modified Haas appliance and the use of Edgewise standard system. Proximal wear were performed to the alignment of mandibular incisors, as well as to reduce the Bolton discrepancy. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, representative of category free, as partial fulfillment of the requirements for obtaining the title of BBO Diplomate.

  11. Effects of direct and indirect repair methods on microleakage in weak anterior teeth root canals%直接与间接修复方法对薄弱根管微渗漏影响的研究

    Institute of Scientific and Technical Information of China (English)

    田野; 邹霖; 屈直; 许艳艳

    2016-01-01

    Objective To compare the difference of the microleakage repaired by direct method and indirect method of the funnel shaped root canal in the anterior teeth. Methods A total of 22 middle teeth at the similar size were collected, prepared into funnel root canal after finishing the root filling. The teeth were divided into A and B groups randomly, and there were 11 test pieces in each group. The root canal was repaired by direct method in group A and indirect method in group B. After 500 thermal-cold cycling and 240 000 dynamic cyclic loading,one tooth was selected in each group randomly. The microstructure were observed by scanning electron microscope (SEM). One piece of each group was randomly selected and the image of the core and the dentin was scanned by electron microscope. The remaining 20 pieces were dyed by India ink, dealt with transparent, compared and observed under the microscope. The degree of microleakage was recorded and analyzed in two groups. Results Under electron microscope, a gap can be observed in the bonding interface of group A. The gap was significantly bigger than that of group B. The leakage was significantly serious in group A than that in group B (P<0.05). Conclusion The level of microleakage of anterior teeth with flared canals, which is restored by fiber post core with the indirect method, is significantly better than that with the direct method. The indirect method has a good edge seal action and is more suitable for clinical application.%目的:比较同种纤维桩核直接法与间接法修复前牙漏斗状根管之间微渗漏的差异。方法收集22颗上颌中切牙,完善根充后,制备漏斗状根管,随机分成A、B两组,每组11个试件,A组直接法完成纤维桩核修复,B组采用间接法修复。通过500次冷热循环及240000次动态循环加载后,每组随机抽取1件制成切片,电镜扫描纤维桩核与牙本质间图像。其余的20个试件经过印度墨水染色,透明化处理

  12. Clinical evaluation of gingival composite resin restoring cervical defects in anterior teeth%应用龈色树脂修复前牙颈部缺损的临床评价

    Institute of Scientific and Technical Information of China (English)

    赵奇; 薛世华; 吴艳; 王世明

    2011-01-01

    Objective : To evaluate the clinical effects of gingival composite resin used for restoring cervical defects in anterior teeth. Methods: Eighty cervical defects of anterior teeth were involved. Firstly, they were restored with simulated restorations using only tooth colored composite resin. Then, the simulated restorations were removed and the defects were restored with simulated restorations using gingival composite resin combined with tooth colored composite resin. Visual analogue scale ( VAS) was employed to survey the patient satisfaction with the esthetic results of the two methods. The defects were filled with gingival composite resin and tooth colored composite resin. Then, longitudinal clinical evaluation were made at 1-week, 6-month, 1-year and 2-year recalls respectively using modified United States Public Health Service ( USPHS) criteria. Results : Simulated restorations made of gingival composite resin and tooth colored composite resin obtained more satisfaction in overall impression, gingival position and tooth contour than simulated restorations simply made of tooth colored composite resin ( P < 0. 1 ) . In the longitudinal clinical evaluation, no significant differences among the recalls were found in color match , restoration morphology, marginal adaptation, marginal discoloration, secondary caries or pulp sensitivity ( P > 0. 1 ) . Conclusion : Using gingival composite resin in restoring cervical defects in anterior teeth achieved not only satisfactory treatment effect but also ideal esthetic results.%目的:评价采用龈色树脂修复前牙颈部缺损的临床效果.方法:选择北京大学口腔医院第一门诊部 2007年6月至2008年10月前牙唇侧颈部缺损患者80例,先单纯使用牙色树脂模拟充填,然后用龈色树脂配合牙色树脂按照前牙美学标准模拟充填.采用视觉模拟评分法,由患者从整体印象、龈位置和牙齿轮廓3个方面对两种充填方法的美学效果满意度分别进行

  13. Clinical observation of esthetic outcomes in immediate implantation after anterior teeth trauma%前牙外伤患者即刻种植美学影响因素的临床观察

    Institute of Scientific and Technical Information of China (English)

    李韩; 何家才

    2016-01-01

    目的:评价前牙外伤后即刻种植的临床美学效果。方法选取2013—2014年就诊于种植中心的前牙外伤患者31例,共植入种植体48枚。拔除外伤患牙后,即刻种植,部分患者同期引导性骨组织再生,3个月后行最终修复。随访1年,统计种植体成功率,观察种植体周围软硬组织改变情况,评价龈乳头指数与红白美学指数、测量边缘骨水平。结果观察期内,种植体成功率均为100%。软组织恢复较好,无牙龈乳头退缩,红色美学得分随植入时间增加,差异有统计学意义,白色美学总分为(7.23±1.17)分。早期骨丧失与骨增量无明显差距,随着骨改建趋于稳定,骨丧失量明显减少,牙槽骨恢复良好。结论前牙外伤患者的即刻种植能缩短手术疗程,减缓种植体周围软硬组织吸收,达到较高的美学满意度。%Objective To evaluate esthetic outcomes in immediate implantation after anterior teeth trauma.Methods 31 cases of an-terior teeth trauma are selected from patients treated at Stomatology Dental Implant Center from 2013 to 2014, with a total number of 48 implants.Implants are placed in fresh extraction socket.Guided bone regeneration (GBR) is implemented intraoperatively when the extraction socket is accompanied by alveolar bone defect.The final restoration was performed 3 months after surgery.1 year follow -up revealed success rate of implants, and changes of hard and soft tissues around implants were observed.The Papilla Index and pink/white esthetic scores were evaluated, and the marginal bone levels around implants were also measured.Results During observation period, the success rates of all the implantations in the 31 cases are 100%.Soft tissues recovered well.No gingival papilla atrophy has been found.With implantation time increasing,pink esthetic scores increased, and the difference was statistically significant.The total score of white esthetic was 7

  14. Evaluation of the therapeutic effect of fluoride varnish Duraphat for incipient carious lesions in permanent anterior teeth%氟保护漆Duraphat治疗前牙初期龋损的临床效果

    Institute of Scientific and Technical Information of China (English)

    辛蔚妮; 许青峰

    2014-01-01

    Objective To assess the therapeutic effect of fluoride varnish Duraphat on the performance of incipient carious lesions white spot lesions (WSL) in anterior teeth in vivo. Methods The sample included 120 children aged 7 to 13 years old , with a total of 146 active WSL in permanent anterior teeth. The children were randomly divided into 3 groups, according to the treatment received:Group A (fluoride varnish Duraphat+oral health instrument, n=52), Group B (oral health instrument, n=47) and Group C (control, n=47). Maximum WSL dimensions (mesiodistal and incisogingival) were measured in millimeters by a previously calibrated single examiner using a periodontal probe . The oral hygiene was assessed by the plaque index . Results Wilcoxon test revealed a statistically significant difference (χ2=29.1,P<0.001) between the initial size and final size in A group (1.53 vs. 0.88) and B group (1.56 vs. 1.47). Pearson′s chi-square test revealed statistically significant differences (χ2=42.5, P<0.001) in the caries activity of the WSL among three groups. Conclusions The fluoride varnish Duraphat is effective to the incipient carious lesions in permanent anterior teeth .%目的:探讨氟保护漆Duraphat对前牙初期龋损白垩色斑块的治疗效果。方法共纳入并分析120例患者146个前牙唇侧白垩斑病损,分为三组:A组(涂氟保护漆Duraphat+口腔健康教育组,n=52),B组(口腔健康教育组,n=47)和C组(对照组,n=47)。由同一位已经过培训的医生采用牙周探针对白垩斑的直径及龋活动性进行评估,同时对研究对象的口腔卫生采用改良菌斑指数进行评估。结果 A组在接受2年的涂氟治疗后其白垩斑直径明显缩小,与另外两组差异有统计学意义(χ2=29.1,P<0.001),初期龋损白垩色斑块活动性龋的比例明显下降(χ2=42.5,P<0.001)。结论氟保护漆Duraphat能有效治疗光滑面的初期龋损。

  15. Research on labial and lingual alveolar bone plate thickness of the mandibular anterior teeth by CBCT%下颌前牙唇舌侧骨壁厚度的锥形束 CT 研究

    Institute of Scientific and Technical Information of China (English)

    朱娟芳; 田雪丽; 田丽萍; 杜田丰; 王茜; 马艳蕊

    2016-01-01

    目的:应用锥形束 CT(CBCT)测量下颌前牙唇舌侧骨壁厚度,为即刻种植提供临床指导。方法选取132例正常牙合个体的 CBCT 图像,对其下颌前牙进行研究。测量根尖处、根尖1/4、根中1/2、根颈1/4处的唇舌侧骨壁厚度,比较左、右侧及性别之间骨壁厚度的差异。结果下前牙左右侧同名牙相应骨壁厚度无差异。除根颈1/4处外,舌侧骨壁较唇侧厚。中切牙、侧切牙和尖牙在根颈1/4处,唇侧骨壁厚度>2 mm 的比例分别占0、0和1.51%。在根中1/4处,分别占0.76%、1.44%和3.79%。性别对舌侧骨壁厚度有影响。结论应用 CBCT 建立了正常牙合个体下颌前牙区唇舌侧骨壁厚度的参考值,为即刻种植提供临床指导依据。%Objective To investigate labial and lingual alveolar bone plate thickness of the mandibular anterior teeth by using cone-beam computed tomography (CBCT),in order to provide a reference for immediate implantation.Methods 132 individuals with normal occlusion were examined with CBCT,and their mandibular anterior teeth were analyzed.The labial and lingual alveolar bone plate thickness at the level of the apical,1/4 of the apical,1/2 of the middle and 1/4 of the cervical were measured.The differences of the thickness were compared among the side and gender.Results There were no significant differences between the left and right sides. Except on the 1/4 of the cervical,the thickness of lingual bone plate was thicker than that of labial bone plate.The frequency of the thickness of the labial bone larger than 2 mm on the 1/4 of the cervical of the center incisor,lateral incisor,and canine were 0,0 and 1.5 1%,respectively,and on 1/4 of the middle were 0.76%,1.44% and 3.79%,respectively.The lingual bone plate thickness showed significant difference between genders.Conclusion Reference values of alveolar bone plate thickness in anterior teeth of normal occlusion were established by using CBCT,which can

  16. Optimizing esthetics for implant restorations in the anterior maxilla: anatomic and surgical considerations.

    Science.gov (United States)

    Buser, Daniel; Martin, William; Belser, Urs C

    2004-01-01

    The placement of dental implants in the anterior maxilla is a challenge for clinicians because of patients' exacting esthetic demands and difficult pre-existing anatomy. This article presents anatomic and surgical considerations for these demanding indications for implant therapy. First, potential causes of esthetic implant failures are reviewed, discussing anatomic factors such as horizontal or vertical bone deficiencies and iatrogenic factors such as improper implant selection or the malpositioning of dental implants for an esthetic implant restoration. Furthermore, aspects of preoperative analysis are described in various clinical situations, followed by recommendations for the surgical procedures in single-tooth gaps and in extended edentulous spaces with multiple missing teeth. An ideal implant position in all 3 dimensions is required. These mesiodistal, apicocoronal, and orofacial dimensions are well described, defining "comfort" and "danger" zones for proper implant position in the anterior maxilla. During surgery, the emphasis is on proper implant selection to avoid oversized implants, careful and low-trauma soft tissue handling, and implant placement in a proper position using either a periodontal probe or a prefabricated surgical guide. If missing, the facial bone wall is augmented using a proper surgical technique, such as guided bone regeneration with barrier membranes and appropriate bone grafts and/or bone substitutes. Finally, precise wound closure using a submerged or a semi-submerged healing modality is recommended. Following a healing period of between 6 and 12 weeks, a reopening procedure is recommended with a punch technique to initiate the restorative phase of therapy.

  17. Prophylactic manual rotation for fetal malposition to reduce operative delivery.

    Science.gov (United States)

    Phipps, Hala; de Vries, Bradley; Hyett, Jon; Osborn, David A

    2014-12-22

    Manual rotation is commonly performed to increase the chances of normal vaginal delivery and is perceived to be safe. Manual rotation has the potential to prevent operative delivery and caesarean section, and reduce obstetric and neonatal complications. To assess the effect of prophylactic manual rotation for women with malposition in labour on mode of delivery, and maternal and neonatal outcomes. We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (31 October 2014), the Australian and New Zealand Clinical Trials Registry (ANZCTR), ClinicalTrials.gov, Current Controlled Trials and the WHO International Clinical Trials Registry Platform (ICTRP) (all searched 23 February 2014), previous reviews and, references of retrieved studies. Randomised, quasi-randomised or cluster-randomised clinical trials comparing prophylactic manual rotation in labour for fetal malposition versus expectant management, augmentation of labour or operative delivery. We defined prophylactic manual rotation as rotation performed without immediate assisted delivery. Two review authors independently assessed study eligibility and quality, and extracted data. We included only one small pilot study (involving 30 women). The study, which we considered to be at low risk of bias, was conducted in a tertiary referral hospital in Australia, and involved women with cephalic, singleton pregnancies. The primary outcome was operative delivery (instrumental delivery or caesarean section).In the manual rotation group, 13/15 women went on to have an instrumental delivery or caesarean section, whereas in the control group, 12/15 women had an operative delivery. The estimated risk ratio was 1.08 (95% confidence interval 0.79 to 1.49). There were no maternal or fetal mortalities in either groupThere were no clear differences for any of the secondary maternal or neonatal outcomes reported (e.g. perineal trauma, analgesia use duration of labour).In terms of adverse events, there were no

  18. Rehabilitation of Eyelid Malpositions Secondary to Facial Palsy

    Directory of Open Access Journals (Sweden)

    Şeyda Karadeniz Uğurlu

    2017-06-01

    Full Text Available Objectives: To evaluate patient satisfaction and outcomes of surgical treatment of eyelid malpositions secondary to facial palsy. Materials and Methods: Consecutive patients with facial palsy who underwent surgical treatment by the same surgeon at İzmir Katip Çelebi University Atatürk Training and Research Hospital between Jan 2007 and Dec 2012 were included in the study. Ophthalmic examination findings, surgical approaches, and their outcomes were evaluated. A successful result for upper eyelid position was defined as more than 50% reduction in lagophthalmos and induction of less than 2 mm of ptosis. A successful outcome for lower eyelid position was defined as the lower eyelid residing at or within 1 mm above or below the limbus. Linear visual analog scale 1 (VAS-1 (subjective complaints and VAS-2 (cosmetic outcome, both ranging from 0 to 10, were used to compare preoperative findings with findings at last postoperative visit. Results: The mean age of the 14 female and 21 male patients was 54.5±19.9 years. Gold weight implantation (n=31, lateral tarsal strip (n=22, tarsorrhaphy (n=15, suborbicularis oculi fat elevation (n=16, hard palate graft (n=14, and eyebrow ptosis repair (n=6 were performed. Average follow-up time was 17.9±16.9 months (range, 2-60. Surgical success rates were 90% for upper lids and 75% for lower lids. Mean lagophthalmos decreased from 7.1±2.7 mm to 1.6±1.6 mm postoperatively (p=0.000. The use of lubricating drops and gels was reduced from average preoperative daily values of 5.3±2.5 drops and 1.3±0.6 gel applications to 4.4±1.4 and 0.6±0.6, respectively (p=0.003, p=0.001. Conclusion: An individualized surgical approach tailored according to each patient’s severity of facial palsy and associated malpositions resulted in both functional and aesthetic improvements in our patients.

  19. Rehabilitation of Eyelid Malpositions Secondary to Facial Palsy

    Science.gov (United States)

    Karadeniz Uğurlu, Şeyda; Karakaş, Mustafa

    2017-01-01

    Objectives: To evaluate patient satisfaction and outcomes of surgical treatment of eyelid malpositions secondary to facial palsy. Materials and Methods: Consecutive patients with facial palsy who underwent surgical treatment by the same surgeon at İzmir Katip Çelebi University Atatürk Training and Research Hospital between Jan 2007 and Dec 2012 were included in the study. Ophthalmic examination findings, surgical approaches, and their outcomes were evaluated. A successful result for upper eyelid position was defined as more than 50% reduction in lagophthalmos and induction of less than 2 mm of ptosis. A successful outcome for lower eyelid position was defined as the lower eyelid residing at or within 1 mm above or below the limbus. Linear visual analog scale 1 (VAS-1) (subjective complaints) and VAS-2 (cosmetic outcome), both ranging from 0 to 10, were used to compare preoperative findings with findings at last postoperative visit. Results: The mean age of the 14 female and 21 male patients was 54.5±19.9 years. Gold weight implantation (n=31), lateral tarsal strip (n=22), tarsorrhaphy (n=15), suborbicularis oculi fat elevation (n=16), hard palate graft (n=14), and eyebrow ptosis repair (n=6) were performed. Average follow-up time was 17.9±16.9 months (range, 2-60). Surgical success rates were 90% for upper lids and 75% for lower lids. Mean lagophthalmos decreased from 7.1±2.7 mm to 1.6±1.6 mm postoperatively (p=0.000). The use of lubricating drops and gels was reduced from average preoperative daily values of 5.3±2.5 drops and 1.3±0.6 gel applications to 4.4±1.4 and 0.6±0.6, respectively (p=0.003, p=0.001). Conclusion: An individualized surgical approach tailored according to each patient’s severity of facial palsy and associated malpositions resulted in both functional and aesthetic improvements in our patients. PMID:28630790

  20. Treatment of multiple traumatized anterior teeth associated with an alveolar bone fracture in a 20-year-old patient: A 3-year follow up.

    Science.gov (United States)

    Faus-Matoses, Vicente; Martínez-Viñarta, María; Alegre-Domingo, Teresa; Faus-Matoses, Ignacio; Faus-Llácer, Vicente J

    2014-10-01

    Intrusive luxation is a type of recognizable luxation injury represented by a deeper axial displacement of the tooth toward the alveolar bone. Treatment strategies include waiting for the tooth to return to its position, immediate surgical repositioning, and repositioning through dental traction by orthodontic devices. The aim of this case report was to present the management of severe dental trauma and later restoration following IADT. A 20-year-old patient was presented after fainting at home four hours before, resulting in a dento-alveolar trauma. Clinical examinations revealed a traumatic intrusion, in 1.2, 1.1 and 2.1, uncomplicated crown fractures in 1.1 and 2.1 and a complicated crown-root fracture in 2.2. The diagnosis was confirmed with CBCT. Following IADT protocol, the emergency treatment consisted of the surgical repositioning and semi-rigid splinting using orthodontic wire-composite, replacing the buccal bone plate, and postoperative instructions to the patient regarding oral hygiene. After 2 weeks the root canal treated and filled with fiberglass posts in 1.2, 1.1, 2.1 and 2.2. Splint was removed after 4 weeks and the IADT reassessment protocol followed, with revisions at 6-8 weeks, 6 months, a year and annual reviews for 5 years. A year after the treatment, the traumatized teeth were restored with minimally invasive preparations of feldspathic ceramic. Esthetics and function were recorded with a 3-year follow-up period. Key words:Intrusive luxation, dental trauma, crown-root fracture, dento-alveolar trauma, permanent tooth, CBCT.

  1. Clinical Application of Digitized Analog Prostheses in Aesthetic Restoration of Anterior Teeth%前牙美学修复中数字化模拟修复体的临床应用

    Institute of Scientific and Technical Information of China (English)

    周开强

    2015-01-01

    目的:研究前牙美学修复中数字化模拟修复体的应用效果。方法选择需要进行前牙美术修复的患者68例,随机分为两组,对照组使用常规修复方式,观察组使用数字化模拟方式。观察两组患者戴调节时间、修复效果以及患者对修复体及修复后面部外观的满意度。结果两组修改效果对比无差异(P>0.05)。观察组戴调节时间和修复后的满意度均优于对照组(P<0.05)。结论前牙美学修复使用数字画模拟方式,事前预估、制作方式都具备可行性,这个方式,能让最初使用的调整速度加快,且患者比较满意。%Objective To study the application of digitized analog prosthesis in anterior aesthetic restorations.MethodsA patient in need of art restoration front teeth 68 patients were randomly divided into two groups,the control group used conventional repair methods,observation group used digitized analog mode. Wearing regulation time,repairing effect,and patient satisfaction with restoration and repair the appearance of the rear section were observed. ResultsThere was no difference in modifying effect of contrast(P>0.05). Observation group wearing satisfaction adjust the time and after the repair than the control group(P<0.05). Conclusion The aesthetic restoration of anterior teeth using digital painting simulation mode,prior estimates, production methods are feasible,this approach,originaly used to adjust the speed to make faster,and more satisfied patients.

  2. 玻璃纤维桩和氧化锆全瓷冠在前牙美学修复中的应用%Zirconia All-ceramic Crowns And Glass Fiber Posts On Aesthetic Restoration Of Anterior Teeth

    Institute of Scientific and Technical Information of China (English)

    宋应博

    2014-01-01

    Objective:To investigate clinical effects of zirconia all-ceramic crowns and glass fiber postson on aesthetic restoration of anterior teeth. Methods:Computer Aided Design and Computer Aided Manufacture(CAD/CAM)technicals were used to make zirconia all-ceramic crowns and glass fiber posts restoration in 162 teeth in 78 patients. In the 2 years,satisfactory degree of patients was evaluated by examining oral adaptability of restoration and gingival health condition. Results:Oral adaptability was accepted by patients with high satisfactory degree. The fall of glass fiber post was found in 2 teeth and gingivitis was found in 1 tooth. The rest were all good. Conclusion:Zirconia all-ceramic crowns and glass fiber posts technical obtained wonderful effects,which was worthy of popularization in clinical practice.%目的:探讨玻璃纤维桩和氧化锆全瓷冠在前牙美学修复中的临床应用效果。方法:应用计算机辅助设计(Computer Aided Design,CAD)和计算机辅助制作(Computer Aided Manufacture,CAM)技术,对78例前牙美学修复的患者,共162颗患牙行玻璃纤维桩和氧化锆全瓷冠修复,随访2年,调查患者满意度,观察修复体在口内适应情况和牙龈的健康状况等,综合评价其应用效果。结果:玻璃纤维桩和氧化锆全瓷冠在口内的适应性良好,患者满意程度高;随访观察中有2颗玻璃纤维桩脱落,1颗牙冠边缘出现牙龈炎,其余修复体均良好。结论:玻璃纤维桩和氧化锆全瓷冠的前牙美学修复效果良好,应用前景广阔。

  3. 浅析联冠或固定桥法修复前牙松动移位缺失%Analysis of the Crown or Fixed Bridge Restoration of Anterior Teeth Loosening Deletion

    Institute of Scientific and Technical Information of China (English)

    向兰锋

    2013-01-01

    Objective To observe the periodontal disease patients before tooth mobility displacement or loss associated with the crown or fixed bridge restoration treatment ef ect. Methods 8 cases of anterior teeth 1~4 teeth loosening or 1~2 teeth missing patients with periodontal disease, periodontal therapy, in combination with the crown or fixed bridge do permanent splint fixation treatment, observation of 1~5 years, al patients were taken X-ray radiograph. Results the periodontal disease patients before tooth mobility displacement loss associated with the crown or fixed bridge restoration after treatment, loosening control, patients feel comfortable and beautiful, the high degree of satisfaction. Conclusion for patients with periodontal disease before tooth mobility displacement or lack of appropriate indications for the crown or fixed bridge restoration treatment, ef icacy, patient satisfaction, but the doctor must be designed to handle the crown gingival margin or bridge body position, and al ow patients to oral hygiene maintenance, ef ective control of plaque.%目的观察牙周病患者前牙松动移位或缺失用联冠或固定桥修复治疗的效果。方法选取8例前牙1~4颗松动移位或1~2颗缺失的牙周病患者,采用牙周基础治疗后,用联冠或固定桥做恒久夹板固定修复治疗,观察1~5年,所有病例均拍摄X线牙片。结果牙周病患者前牙松动移位缺失用联冠或固定桥修复治疗后,松动移位得到控制,患者感觉舒适美观,其满意度高。结论对牙周病患者前牙松动移位或缺失选择合适的适应症用联冠或固定桥修复治疗,效果肯定,患者满意,但医生一定要设计处理好冠龈缘或桥体位置,并让患者做好口腔卫生维护,有效控制菌斑。

  4. Má oclusão Classe I de Angle, com mordida aberta anterior, tratada com extração de dentes permanentes Angle Class I malocclusion, with anterior open bite, treated with extraction of permanent teeth

    Directory of Open Access Journals (Sweden)

    Mírian Aiko Nakane Matsumoto

    2011-02-01

    Full Text Available A mordida aberta é uma anomalia com características distintas que, além da complexidade dos múltiplos fatores etiológicos, traz consequências estéticas e funcionais. Muitas alternativas têm sido utilizadas em seu tratamento, entre elas a grade palatina, forças ortopédicas, ajuste oclusal, camuflagem com ou sem exodontias, mini-implantes ou miniplacas e cirurgia ortognática. O diagnóstico preciso e a determinação da etiologia permitem estabelecer os objetivos e o plano de tratamento ideal para essa má oclusão. O presente relato descreve o tratamento de uma má oclusão Classe I de Angle, com padrão esquelético de Classe II e mordida aberta anterior, realizado em duas fases e que foi apresentado à diretoria do Board Brasileiro de Ortodontia e Ortopedia Facial (BBO, representando a categoria 2, como parte dos requisitos para a obtenção do título de Diplomado pelo BBO.Open bite is an anomaly with distinct characteristics which, in addition to involving complex, multiple etiologic factors, entails aesthetic and functional consequences. Many alternative approaches have been employed to treat open bite, including palatal crib, orthopedic forces, occlusal adjustment, camouflage with or without extractions, mini-implants or mini-plates, and orthognathic surgery. By determining accurate diagnosis and etiology professionals can set the goals and ideal treatment plan for this malocclusion. This report, describing the two stages treatment of a Angle Class I malocclusion with Class II skeletal pattern and anterior open bite, was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO, representative of category 2, as partial fulfillment of the requirements for obtaining the title of BBO Diplomate.

  5. False Teeth

    African Journals Online (AJOL)

    FOMCS2

    More than 80% of the respondents used traditional medicine alone or in combination with modern .... Table 2. Perceived causes of false teeth and millet disease in Bushenyi district ..... “Killer” canine removal and its sequelae in Addis Ababa.

  6. Teething Tots

    Science.gov (United States)

    ... some may seem cranky for weeks, with crying spells and disrupted sleeping and eating patterns. Teething can ... it can't break into small pieces. A wet washcloth placed in the freezer for 30 minutes ...

  7. Finnegan's teeth

    OpenAIRE

    Cowan, Judith

    2009-01-01

    Finnegan's Teeth is a visual journey seen through the eyes of the animal, Finnegan. Taking place around King's Cross in London, it follows the area as it goes through construction and deconstruction. Photographs of the happenings and events that Finnegan notices on his travels accompany the voices of the street life around him. Finnegan's Teeth is the title of a recently published book by artist Judith Cowan, which has now developed into a major public Art project. This takes Finnegan's ...

  8. 牙冠延长术用于前牙冠修复的牙周指标分析%Periodontal index analysis of crown lengthening surgery for anterior teeth crown restoration

    Institute of Scientific and Technical Information of China (English)

    李隽; 刘晓峰

    2014-01-01

    目的:评价牙周基础治疗及牙冠延长术治疗前牙不良冠修复所致牙周病的临床疗效。方法:选取30例前牙冠修复所致牙周病患者共105颗患牙,均采用牙周基础治疗及牙冠延长术后再行冠修复,观察不同时段临床冠长度的变化,记录各相关牙周指数并进行分析,评估术后全冠修复的临床效果。结果:术后短期内临床冠长度增加效果确切,治疗组术后的各项牙周指数均优于术前(P<0.05),与对照组比较无明显差异(P>0.05),在1年的观察期内保持相对稳定(P>0.05);全冠修复体的固位良好,边缘密合,龈缘与冠缘的位置关系相对稳定。结论:牙周基础治疗及牙冠延长术有利于不良冠修复所致牙周病的治疗,且冠延长术解决了生物学宽度的问题,确保了牙周健康的长期稳定。%Objective:To evaluate the clinical effect of initial therapy and crown lengthening surgery on anterior teeth involved with periodontal disease after crown restored. Method:Initial therapy and crown lengthening surgery were applied to 105 anterior teeth of 30 cases. After treatment all teeth were restored by crowns. At different time we observe changes in clinical crown length,record relevant periodontal index and analyse and evaluate clinical effect of the postoperative crown restoration. Result:Postoperative clinical crown length had obvious short-term effect.The experiment group's postoperative periodontal index were superior to preoperative index(P0.05),and remained relatively stable in one-year observation period (P >0.05).The retention of crown prosthesis was bet-ter,and the margin was fitted well and relatively stable to the margin of gingival. Conclusion:Crown lengthening surgery solved the problem of biologic width. Therefore,right selection of indications,initial therapy,crown lengthening surgery and accurate restoration design contribute to the treatment of periodontal

  9. 上颌前牙即刻种植修复8例报道%The report of maxillary anterior teeth with immediate implant in 8 cases

    Institute of Scientific and Technical Information of China (English)

    刘勇; 杨晓玄; 卢燕波; 周国清; 彭晓芸

    2015-01-01

    Objective To evaluate the esthetic effect of the lost tooth repaired by immediate implant cmbined with GRB. Methods The residual roots in maxillary an terior zone with labial bone defect of five male and three female,anged grom 18 to 55,have to be extracted.They gt immediate implant with GRB.Then the results were evaluated with CT and the satisfaction of patients. Results All implants were survived,but just one patient was found gingival recessin of adjacent tooth.The CT images changed little compared with pre-operatin. Condusion Immediate implant combined with GRB could be applied to the dental clinical practice in maxillary anterior zone for satisfactory aesthetic effect.%目的:评价上颌前牙区即刻种植联合GBR修复缺牙的美学效果。方法:8位上颌前牙残根无法保留,伴唇侧缺损的患者(男5例,女3例),年龄18~55岁,接受了骨水平种植即刻修复同期GBR骨增量处理,对其临床疗效进行评价,术前留取口内照片及放射线资料,在术后、修复完成及复查时,观察牙槽骨吸收情况及牙龈情况,询问患者的满意度。结果:接受种植修复的8例患者种植体均存活,有1例出现邻牙唇侧牙龈萎缩,其余牙齿的牙龈稳定,有2例术后牙龈缘位置向冠方增长。种植复查时放射线检查基本与修复时相比无明显变化。结论:在前牙区应用即刻种植的方法可以取得满意的美学效果,是一种较可靠的种植修复方式。

  10. Study of loose teeth fixed titanium chain for treatment of children with maxillary anterior teeth fixed traumatic loose%改良松牙固定钛链用于儿童上颌外伤松动前牙固定的临床疗效

    Institute of Scientific and Technical Information of China (English)

    韩峰

    2014-01-01

    Aim:To study the clinical curative effect of loose teeth fixed titanium chain for treatment of children with maxillary anterior teeth fixed traumatic loose .Methods:34 children with maxillary anterior teeth fixed traumatic loose were selected.They were randomly divided into two groups ,the observation group were treated with improved loose teeth fixed ti-tanium chain technology ,the control group were given the bracket archwire treatment technology ,the efficiency gingival in-dex,comfort index,falling number and operation time of resin of both groups were compared .Results:The effective rate of treatment group was 94.12%,while 88.24%in the control group,there was no significant difference between both groups (χ2 =0.060,P=0.472).Two weeks after treatment,no significant difference between the gingival index of both groups (Z=0.658,P=0.084);after 4 weeks treatment,the observation group with gingival index was significantly lower than that in the control group(Z=2.160,P=0.022).The observation group with comfort index ,resin off number and operating time was(3.96 ±1.27),(0.11 ±0.15),(8.68 ±1.18)min,the control group were(7.34 ±1.78),(0.85 ±0.36),(19.19 ± 2.85)min,the observation group with comfort index ,resin off the number and time of operation were significantly lower than those in the control group,there was significant difference between groups (t=3.834,0.056,8.327,P all<0.05).Conclu-sion:Improved loose teeth fixed titanium chain technology was used for fixing the maxillary anterior teeth trauma .The clini-cal curative effect is reliable .This technology can reduce the pain of patients ,reduce the gingival index ,and the number of resin shedding ,shorten fixed operation time as well .%目的:探讨改良松牙固定钛链技术固定儿童上颌外伤松牙的临床疗效。方法:选取2013年1月至12月接受治疗的34例牙外伤患儿为研究对象,观察组给予改良松牙固定钛链技术固定松牙,对照组给予弓丝托

  11. A finite element analysis of en-mass retraction of maxillary anterior teeth with double keyhole loops%双钥匙曲整体内收上前牙的三维有限元研究

    Institute of Scientific and Technical Information of China (English)

    李永刚; 金晶; 孙婧婧; 王为; 冯雪

    2016-01-01

    Objective:To evaluate the biomechanical effects of en-mass retraction of maxillary anterior with double keyhole loops in different kinds of loading methods on maxillary anterior teeth.Methods:Three 3D finite element models of the maxillary with double keyhole loops were constructed using MIMICS software with CT data of a male patient who had maxillary first premolars extracted.The orthoclontic force was loaded by ① back winding of the archwire end,② archwire strengthening and ③ archwire strengthening com-bined with successive ligation on the top of the doube keyhole loops,respectively.The initial displacement of maxillary anterior teeth in different loading conditions was analysed with the help of ANSYS software.Results:From the loading condition 1 to 3,on the sagit-tal direction,the displacement difference of crown and root of the maxillary central incisor was reduced from 4.19E -03 mm to -8. 85E -03 mm,which means that the lingual crown tipping movement gradually turn into bodily movement and then to labial tipping crown movement.Meanwhile the displacement of lateral incisor decreased from 7.99E -03 mm to 5.84E -04 mm and that of canine decreased from 9.47E -03 mm to 8.54E -03 mm.Vertical movement of incisors became intrusion from extrusion and intrusion move-ment of canines become more significantly.Conclusion:Torque control of anterior teeth is different in three loading conditions,load-ing by ligation and successive ligation on the top of the double keyhole loops may make the anterior tooth movement as a whole.%目的:探讨双钥匙曲整体内收上前牙的过程中不同的加力方式对上颌前牙生物力学效应的影响。方法:采用 CBCT采集患者上颌骨以及上牙列数据信息,利用 Mimics 软件进行三维重建,建立双钥匙曲整体内收上前牙的三维有限元模型;在ANSYS 软件中分别分析①末端回弯、②结扎丝加力以及③结扎丝加力联合双钥匙曲顶部连扎3种工况下上颌前牙

  12. 外伤移位前牙两种固定方法的疗效比较%Comparison of two methods on the fixation of loose anterior teeth

    Institute of Scientific and Technical Information of China (English)

    孟慧萍; 王晓洁; 任肖华; 陈宇梅

    2012-01-01

    Objective To compare the clinical effects of segmented arch technique and glass fiber reinforced composite resin dental splint method on the fixation of loose anterior teeth caused by trauma. Methods 34 patients with traumatic loose teeth were chosen as specimens, they were randomly divided into two groups, one of which treated with segmented arch technique, the other treated with glass fiber reinforced composite resin dental splint. Fixation lasted for 8 weeks. The clinical effect was compared through the clinical examination and x-ray. Results The segmented arch and glass fiber reinforced composite resin dental splint were stable and the periodontal tissue was healthy in 34 patients. The alveolar bone had not absorbed and the traumatic loose teeth were not movement any more even though the fixed appliances were taken out. Glass fiber reinforced composite resin dental splint method is better in comfortable and beautiful than segmented arch technique. Conclusion The segmented arch technique and glass fiber reinforced composite resin dental splint all are the good approach to the fixation of loose teeth, but the glass fiber reinforced composite resin dental splint is more esthetic and more comfortable.%目的 评估片段弓固定法与高强纤维夹板固定法在外伤移位前牙固定术中的临床效果.方法 将34例因训练和运动导致上前牙移位和半脱位的门诊军人随机分成两组,分别采用片段弓固定法与高强纤维夹板固定法进行复位固定,8周后通过临床和X线检查,比较其临床应用效果.结果 两组34例患者固位效果稳固、无松脱,牙龈组织健康;去除固定后检查外伤牙均无松动,无叩痛;X线检查未见牙槽骨及牙根吸收现象.在即刻效果的美观、舒适方面高强纤维夹板固定法优于片段弓固定法.结论 对于外伤所致的上前牙移位和半脱位患者,两种固定法均可有效的固定松动患牙;高强纤维夹板固定法更为美观和舒

  13. Rare occurrence of bilaterally impacted mandibular supernumerary teeth

    Directory of Open Access Journals (Sweden)

    Vinay Kumar Bhardwaj

    2012-01-01

    Full Text Available Introduction: Supernumerary teeth are present in addition to the normal complement of teeth in permanent or deciduous dentitions. Incidence is high in permanent dentition, affects both the gender. They are more common in males, with the male to female ratio of 2:1. When the supernumerary teeth are causing problems such as, extensive resorption of adjacent teeth, hindering the eruption or malposition of permanent teeth, early surgical intervention is recommended. Case Report: A case of bilaterally impacted supernumerary premolars was reported when an orthopentomograph view was taken which revealed the presence of additional teeth impacted in relation to 35-36 and 45-46. Surgical removal was done as they were resorbing the roots of teeth in their vicinity. Discussion: Literature reports increased occurrence of the supernumeraries in the maxilla but supernumerary premolars are more likely to develop in the mandible. Etiology of supernumerary teeth is ambiguous and is due to following conditions:atavism or reversion, heredity, aberrations during embryologic formation, progress zone, and unified etiologic explanation.

  14. 闭合式开窗术联合正畸牵引治疗骨埋伏阻生前牙32例临床分析%Clinical analysis of cosed-eruption surgical technique combined with orthodontic traction in the treatment of bone impacted anterior teeth of 32 cases

    Institute of Scientific and Technical Information of China (English)

    孟元元; 韩立显

    2014-01-01

    目的:探讨闭合式开窗术联合正畸牵引治疗骨埋伏阻生前牙的治疗效果。方法:收治骨埋伏前牙患者32例35颗,先行正畸开拓埋伏牙萌出间隙,后行手术开窗,术中充分暴露埋伏牙黏接牙面,黏接正畸牵引附件,待伤口愈合开始埋伏牙牵引助萌。结果:32例患者中,导萌术后有2例2颗埋伏前牙在术后2个月内自行萌出,有3例患者因出国、转学等原因停止治疗。27例共28颗埋伏前牙中成功23颗(82.14%),有效3颗(10.71%),失败1颗(3.57%)。经闭合式开窗术联合正畸牵引治疗28颗埋伏牙全部萌出至正常咬牙合位置,牙龈形态满意,牙髓活力正常,未见邻牙牙根吸收及损伤。结论:使用闭合式开窗术联合正畸牵引治疗埋伏阻生前牙可取得良好的临床治疗效果。%Objective:To explore the clinical effect of cosed-eruption surgical technique combined with orthodontic traction in the treatment of bone impacted anterior teeth.Methods:32 patients with bone impacted anterior teeth of 35 teeth were selected.The patients first were given orthodontic pioneering impacted tooth adorable out the gap,and then were given fenestration operation. Impacted tooth bonding tooth surface was fully exposed in the operation.It was adhesive with orthodontic traction accessories.After wound healing,traction of teeth was impacted to help germination.Results:In 32 patients,after guided eruption operation,2 cases of 2 impacted anterior teeth were eruption in 2 months after operation,3 patients discontinued treatment due to go abroad,transfer and other reasons.A total of 27 patients with 28 impacted anterior teeth,23 teeth(82.14%) were successful;3 teeth(10.71%) were effective;1 tooth(3.57%) was failed.After cosed-eruption surgical technique combined with orthodontic traction treatment,the 28 impacted teeth were erupted to the normal position;gingival morphology was satisfied;dental pulp vitality was normal

  15. Finite element analysis of stress distribution of mandibular anterior teeth fixed by fibre strengthened com-posite resin splint%纤维加强树脂夹板固定下颌前牙应力分布的有限元分析

    Institute of Scientific and Technical Information of China (English)

    郑立娟; 马卫东; 陈秉智

    2012-01-01

    Objective: To analyze the stress distribution of mandibular anterior teeth fixed by fibre strengthened composite resin splint. Methods:The mandibule with normal teeth of a healthy male volunteer was scanned by CT, the image was transfered into DI-COM file and then put into Mimics finite element software, the stress distribution of the anterior teeth with various alveolar bone absorption was analysed before and after application of the fibre strengthened composite resin splint. Results: The max von Mises stress of lower anterior teeth increased as the the alveolar bone absorption increased, meanwhile the strength on central and lateral incisors changed obviously and related to the canine teeth. But when the alveolar bone absorbed by 50% or more of the root length, the stress value of the apical increased significantly. Application of the fibre strengthened composite resin splint reduced the stress on the anterior teeth, and increased the stress on canine. Conclusion; Fiber composite resin periodontal splint can effectively spread the occlusal force to related teeth.%目的:探讨不同牙周状况下,纤维加强复合树脂夹板固定前后的应力分布;为临床牙周夹板应用提供理论参考.方法:采用CT技术、计算机图像处理系统及有限元软件建模,研究不同牙周支持组织的下前牙纤维加强复合树脂夹板固定前后应力的分布.结果:下前牙的von Mises应力的最大值,随着牙槽骨吸收程度的增加,逐渐增大,中切牙和侧切牙的变化明显,尖牙平缓.但当牙槽骨吸收达根长的1/2或以上时,根尖的应力值急剧增大;戴用牙周夹板后,中切牙和侧切牙的应力值均减小,而尖牙的应力值增加.结论:牙槽吸收达根长的1/2或以上时,牙周组织缓冲能力降低,应采取牙周夹板固定,纤维加强复合树脂夹板能有效分散(牙合)力至有富余潜能的牙齿上.

  16. 安氏Ⅱ1类错前牙宽度厚度与Bolton 指数测量分析%STUDY IN THE MESIODISTAL WIDTH AND THE CROWN THICKNESS OF ANTERIOR TEETH AND BONLTON INDEX IN CLASS Ⅱ1 MALOCCLUSION

    Institute of Scientific and Technical Information of China (English)

    徐佳瑛; 马超

    2015-01-01

    目的:通过对正常与安氏Ⅱ1类错模型的比较,分析上下颌牙冠宽度、上颌牙冠厚度、Bolton指数差异,为安氏Ⅱ1类错矫治设计提供参考。方法以正常,安氏Ⅱ1类错各50例为研究对象,分别进行牙冠宽度、牙冠厚度的测量并计算。结果安氏Ⅱ1类错上下颌侧切牙和下颌中切牙的牙冠宽度比正常大,差异有统计学意义(P<0.05)。 Bolton 指数前牙比:正常>安氏Ⅱ1类错。安氏Ⅱ1类错上前牙牙冠厚度均大于正常,差异有统计学意义(P <0.05)。 结论上下颌牙量不调和上前牙牙冠厚度变化会对安氏Ⅱ1类错矫治后期正常前牙咬合关系的建立产生影响。%Objective To compare the mesiodistal width and the crown thickness of anterior teeth and Bolt‐on Index of Class Ⅱ 1 and normal occlusion casts in order to provide reference for the diagnosis and treat‐ment of Class Ⅱ 1 malocclusion .Methods Fifty cases of normal occlusion ,Class Ⅱ 1 malocclusion were selected ,respectively .Mesiodistal width of anterior teeth and the upper anterior teeth's thickness were measured and Bolton Index was calculated .Results The results indicated that mesiodistal width of maxil‐lary and mandibular lateral incisors and mandibular central incisors in Class Ⅱ 1 malocclusion were larger than that in normal occlusion with significant difference(P< 0 .05) .Bolton Index of normal occlusion was larger than that of Class Ⅱ 1 malocclusion .The crown thickness of upper anterior teeth in Class Ⅱ 1 maloc‐clusion were larger than that in normal occlusion with significant difference(P < 0 .05) .Conclusion The maxillary and mandibular teeth size discrepancy and the change of the upper anterior teeth's thickness can have effect on the ultimate occlusion of Class Ⅱ 1 malocclusion after orthodontic treatmeant .

  17. Esthetic restoration for anterior teeth with the hot pressed porcelain laminate veneers%热压铸造陶瓷制作前牙瓷贴面的临床效果观察

    Institute of Scientific and Technical Information of China (English)

    许少平; 骆小平; 石玉娟

    2012-01-01

    目的:探讨采用热压铸造瓷块制作前牙瓷贴面的临床修复效果.方法:选择要求进行前牙修复的患者32例,共206颗牙.其中,氟斑牙患者20例,轻度四环素牙患者8例,牙唇侧釉质发育不全或釉质表面有明显裂纹患者4例.根据邻牙颜色、皮肤和唇颜色选择瓷块颜色,进行失蜡热压铸造成型,并经过口内试戴、仔细修形后,再在超薄贴面的边缘嵴、切缘等部位进行特殊艺术化染色处理,采用VariolinkⅡ树脂粘固剂黏结超薄瓷贴面.结果:根据改进的USPHS标准评价临床美学修复效果:瓷贴面的半透性极佳,边缘完整性好,与预备体边缘终止线对接密合.经7年多使用,瓷贴面边缘无着色,且能吸收牙龈和邻牙的色泽而产生良好的变色龙作用,同时精雕后的瓷面能够产生自然牙釉质的表面特征.经7年多临床观察,206个瓷贴面仅有5个发生瓷体折裂和脱落.结论:采用热压铸造陶瓷制作瓷贴面,具有操作简单、修复体强度高、磨除牙体组织少、美观效果好等特点,特别适用于氟斑牙、轻度四环素牙、自然磨损牙的美学修复.%To evaluate the esthetic effect of anterior porcelain veneers fabricated with the heat pressed glass ceramic. METHODS: Thirty-two patients, who wanted to receive a aesthetic restorative treatment for 206 anterior teeth were selected. Among them, 20 were for dental fluorosis, 8 were for light tetracycline stained teeth, the other 4 were labial enamel hypoplasia or obvious crack on the surface of enamel. According to the color of adjacent teeth ,skin and lips, heat pressed IPS e.rnax ingots of different color were chosen to mold the restorations. Afterwards, special straining technique was conducted on the marginal ridge and incisor ridge of the veneers after carefully trimmed in the mouth. Restorations were them bonded with Variolink II resin cement. After 7 years of follow-up, a modified USPHS criterion was used to evaluate the

  18. Observation of effect of using mineral trioxide aggregate to prevent external resorption in traumatic permanent anterior teeth%预防性使用MTA控制外伤恒前牙牙根外吸收的临床疗效观察

    Institute of Scientific and Technical Information of China (English)

    周中苏

    2013-01-01

    目的:探讨牙根发育完成的外伤冠折露髓恒牙使用MTA预防性控制根吸收的临床疗效.方法:对109颗牙根发育完成的冠折露髓恒牙随机分为预防性使用MTA治疗组(55颗)和常规治疗组(54颗),完成根管治疗.2年后,通过临床症状及X线根尖片判断疗效.结果:预防性使用MTA治疗组控制根吸收成功率为98.07%,对照组成功率为86.00%,两组间比较差异有统计学意义(P<0.05).结论:外伤恒前牙使用MTA预防性控制根吸收临床疗效好,值得临床应用.%Objective:To evaluate the effect of using mineral trioxide aggregate to prevent external resorption in traumatic permanent anterior teeth.Method:55 traumatic permanent anterior teeth with completed apices referred to our hospital for root canal treatment received an procedure with MTA,and 54 traumatic permanent anterior teeth was filled with gutta-flow.Patients were recalled after 2 years to evaluate the effect.Result:The success rate of MTA group was 98.07 % and control group was 86.00 %.There was significant different in two groups (9 < 0.05).Conclusion:The effect of MTA in preventing external resorption of traumatic permanent anterior teeth is effective,MTA is worth clinical applying.

  19. Entropion-ectropion: the influence of axial globe length on lower eyelid malposition.

    Science.gov (United States)

    Jyothi, Sreedhar B; Seddon, Jack; Vize, Colin J

    2012-01-01

    To evaluate the effect of axial globe length and other biometry parameters on age-related lower eyelid malposition. Consecutive patients with involutional lower eyelid malposition underwent preoperative biometry with Zeiss IOL Master and Hertel's exophthalmometer prior to surgery. Patients with other causes of eyelid malposition and thyroid eye disease were excluded. GraphPad InStat was used for t test and chi-square statistical analysis. Data on 57 eyelids of 52 Caucasian patients were collected. There were 28 ectropions and 29 entropions. The mean axial globe length in the ectropion group (23.5 mm, standard deviation ± 0.9) was significantly longer than in the entropion group (22.7 mm, standard deviation ± 1.03) (p = 0.008). There was significant sex predilection, with entropion more common in women and ectropion more common in men (p = 0.03). The mean axial globe projection in the ectropion group was 16.6 mm (standard deviation ± 2.4) and in the entropion group was 14.6 mm (standard deviation ± 2.7) (p = 0.002). There was no statistical difference in age, keratometry, amount of astigmatism, and cylinder axis. Involutional eyelid malposition directly correlates with axial globe length with the ectropion group having lengthier eyes compared with the entropion group. Hence, axial globe length could be an influential factor in the onset of involutional eyelid malposition.

  20. Evaluation of the Sherlock 3CG Tip Confirmation System on peripherally inserted central catheter malposition rates.

    Science.gov (United States)

    Johnston, A J; Holder, A; Bishop, S M; See, T C; Streater, C T

    2014-12-01

    Peripherally inserted central catheters are often positioned blindly in the central circulation, and this may result in high malposition rates, especially in critically ill patients. Recently, a new technology has been introduced (Sherlock 3CG Tip Positioning System) that uses an electro-magnetic system to guide positioning in the superior vena cava, and then intra-cavity ECG to guide positioning at the cavo-atrial junction. In this observational study, we investigated how the Sherlock 3CG Tip Positioning System would affect peripherally inserted central catheter malposition rates, defined using a post-insertion chest radiograph, in critically ill patients. A total of 239 catheters positioned using the Sherlock 3CG Tip Positioning System were analysed. When an adequate position was defined as low superior vena cava or cavo-atrial junction, 134 catheters (56.1%; 95% CI 50-62%) were malpositioned. When an adequate position was defined as mid/low superior vena cava, cavo-atrial junction or high right atrium (≤ 2 cm from cavo-atrial junction), 49 (20.5%; 95% CI 16-26%) catheters were malpositioned. These malposition rates are significantly lower than our own historical data, which used a 'blind' anthropometric technique to guide peripherally inserted central catheter insertion.

  1. The alar rim flap: a novel technique to manage malpositioned lateral crura.

    Science.gov (United States)

    Kemaloğlu, Cemal Alper; Altıparmak, Mehmet

    2015-11-01

    Alar cartilage malposition is a common anatomic variation in which the axis of the lateral crus lies cephalically and may be parallel to the cephalic septum. Malposition of the lateral crura may produce inward collapse of the alae that is observable on deep inspiration. The authors performed the alar rim flap technique to treat patients with alar malposition and assessed functional and aesthetic outcomes. Twelve patients who underwent primary open rhinoplasty with the alar rim flap technique were evaluated in a prospective study. A 2- or 3-mm caudal portion of the lateral crus was elevated from the underlying mucosa, pulled caudally, and extended with a cartilage graft. This extension of the alar rim flap was placed through the pyriform aperture for additional support. Patients completed pre- and postoperative questionnaires addressing nasal obstruction and underwent paranasal computed tomography. Patients received follow-up for an average of 16 months (range, 8-27 months). Patients with alar cartilage malposition and external valve insufficiency experienced aesthetic and functional improvements after rhinoplasty with the alar rim flap technique. No patients developed alar rim collapse or flap displacement. The alar rim flap technique is effective for the correction of malpositioned lateral crura and external valve insufficiency. Because this technique does not damage the scroll area, disruption of the internal valve area is avoided. 4 Therapeutic. © 2015 The American Society for Aesthetic Plastic Surgery, Inc. Reprints and permission: journals.permissions@oup.com.

  2. The primary evaluation of minimal prepared ceramic veneer in anterior teeth for clinical application%微创全瓷贴面修复临床应用初探

    Institute of Scientific and Technical Information of China (English)

    刘峰; 师晓蕊; 李祎; 徐明明; 王六

    2012-01-01

    Objective To evaluate the clinical application value of minimal prepared ceramic veneer in anterior teeth,by analyzing the esthetic effects and success rates.Methods Forty-four anterior teeth in 30 patients with minor esthetic defect were included in this study.Less than 0.5 mm preparation or no preparaion technique was used in the clinical procedure.Glass ceramics veneers were delivered and 3M Relyx Veneer were used as the adhesive.The final appearance of each restoration was evaluated by patients on visual analogue scales ( VAS ) and by professional prosthodontists. Evaluation criteria included margin effects,color,shape and translucency.The success rate of all the restoration were analyzed in 6,12 and 24 month after the treatment. Results The patients' degree of satisfaction was 9.2 ±0.4,while the excellent rate of esthetic effect of margin effect,color,shape and translucency was 89% (39/44),91% (40/44),98 % ( 43/44 ) and 93 % ( 41/44 ) by professional prosthodontist.The success rate of 6,12 and 24 month were 100% (44/44),98% ( 43/44 ) and 91% (40/44).Conclusions The minimal prepared venneers have a good esthetic effect and a satisfactory success rate,and is a suitable technique in esthetic treatment under the critical indications.%目的 通过分析微创全瓷修复体的美学效果和成功率,初步评价该修复形式的临床应用价值.方法 对30例前牙美学缺陷患者的44颗患牙进行0.5 mm厚度以内的牙体预备或不进行牙体预备,采取长石质陶瓷材料制作全瓷修复体,应用树脂粘接剂粘接.修复后患者采用视觉模拟评分法(visual analogue scales,VAS)评价美学效果满意度;同时,3名修复专业医师对修复后照片进行美学效果评价(边缘美观效果、颜色、形态、半透明度).修复后6、12、24个月复查评价成功率.结果 修复后患者对修复体美学效果的满意度为9.2±0.4;医师美学效果评价中修复体的边缘美观效果、颜色、形

  3. 前牙区牙龈组织的自我修复效果研究%Study on self-healing effect of anterior teeth area gingival soft tissue in clinical patients

    Institute of Scientific and Technical Information of China (English)

    程旭; 黄伟; 张志宏; 刘红红; 倪婧; 查大慧; 龚乃胜; 张燕

    2015-01-01

    Objective:The purpose of this study is to observe the self-healing effect of gingival soft tissue under the condition of keeping the residual roots in anterior teeth area. Method:16 patients,involving the residual roots or crowns in maxillary anterior teeth area (right maxillary central incisor) were included in the study. Grinding the residual roots or crowns to approximate alveolar ridge top level in subgingival margin and avoiding wearing gingival tissue were conducted for these 24 patients. The growth of gums were observed in the 10 th,20 th,30 th days after surgery,and then,the distance be-tween gingival papilla and adjacent regions spire and the distance between the modpoint of gingival margin and adjacent tooth spire were measured. All the statistical analyses for the experimental data measured were performed by SPSS 13.0 sta-tistical software. Result:Hyperplasia of the gum tissue in the 30 th day after surgery was nearly full of residual root fracture, and no color and texture difference was found between the gingival tissue and normal gingival. With the increasing of obser-vation time,the distance between gingival papilla and adjacent regions spire and the distance between the modpoint of gin-gival margin and adjacent tooth spire were much shorter,and the difference was statistically significant(F=11.502,P<0.001;F=26.088,P <0.001). Conclusion:Keeping the residual roots in clinic can make gingival have an ability of self-healing in the case of no damage.%目的:观察前牙区残根保留情况下牙龈组织的自我修复能力. 方法:上颌前牙区残根或残冠患者16例,将残根或残冠磨至龈缘下平齐牙槽嵴顶水平,避免磨损牙龈组织,术后第10、20、30 d观察牙龈生长情况,测量龈乳头至邻牙牙尖水平面的垂直距离、龈缘中点至邻牙牙尖水平面的垂直距离. 利用SPSS 13.0软件对测量的实验数据进行统计学分析. 结果:术后第30 d增生的软组织基本覆盖残根断面,且新生的

  4. A clinical cephalometric study of mini-implant anchorage for en-masse retraction of eight maxillary anterior teeth%微种植体辅助整体内收上前牙段的头影测量

    Institute of Scientific and Technical Information of China (English)

    张华; 麦志辉; 卢红飞; 艾虹; 文冲

    2011-01-01

    目的:研究微种植体支抗在矫治上颌前突病例中整体内收上前牙段的应用.方法:选择5例上颌前突患者,拔除第二前磨牙,采用直丝弓矫治技术,辅以微种植体支抗同时整体内收前牙段(6个前牙及2个第一前磨牙),通过X线头影测量分析,观察矫治前后上颌骨软硬组织的变化.结果:上颌骨的变化轻微;切牙平均内收(4.6±1.5)mm,压低(0.8±1.1)mm,根尖后移(1.7±1.4)mm,切牙与腭平面的夹角减少(6.8±3.5)度;支抗磨牙水平前移(0.5±0.3)mm,没有出现明显的颌向伸长;上唇突度减少(2.0±0.9)mm,鼻唇角增大(3±2.4)度.结论:微种植体能提供稳定的支抗,同时整体内收上前牙段,最大限度避免支抗的丧失,改善上唇突度.%Aim: To Study the efficiency of mini-implants as intraoral anchorage units for en-masse retraction of the 6 maxillary anterior teeth and 2 first premolars after the second premolars are extracted. Methods: Five patients requiring high anchorage after extraction of the maxillary second premolars were selected for this study. Straight wire appliance and mini-implants were used for en-masse retraction, Horizontal , vertical, and angular positions of the maxillary ? Rst molar and central incisor were evaluated ceph-alometrically before and after orthodontic retraction. Results; The edge of upper incisors were retracted (4. 6 ±1. 5)mm and intruded (0. 8 ±1. L)mm, the root apex moved distally (1. 7 ± 1.4)mm. The maxillary first molars showed mesial movement of (0. 5 ±0. 3)mm. The nasolabial angle increased (3 ±2.4)° and the angle between upper incisor and PP-plane decreased (6. 8 ± 3. 5 ) °. Conclusion: Mini-implants are efficient for intraoral anchorage reinforcement for en-masse retraction and intrusion of maxillary anterior teeth.

  5. Thickness of labial gingiva and mucosa at maxillary anterior teeth measured by cone-beam CT%上颌前牙唇侧牙龈及牙槽黏膜厚度的锥形束CT测量研究

    Institute of Scientific and Technical Information of China (English)

    师苏萌; 施生根; 白忠诚; 闫澍; 吴宝江

    2014-01-01

    AIM:To measure the thickness of labial gingiva and mucosa at maxillary anterior teeth by cone-beam CT and to analyze its association with gender and body mass index (BMI).METHODS:45 male and 55 fe-male youths of Han nationality were included.At the time of cone-beam CT scanning,a mouth opening device was used to retract soft tissues away from the teeth and gingiva.The thickness of labial gingiva and mucosa was measured at six different leves on each maxillary anterior tooth from gingival margin to crest of alveolar ridge and from the alveolar crest ridge to apical 3 mm respectively.The mucosal width was measured from gingival margin to the crest of alveolar ridge.T-test was used to examine the gender differences.Pearson correlation analysis was used to examine the correla-tions between mucosal thickness and BMI.RESULTS:As total,the thickness(mm)of gingiva at central incisor,lat-eral incisor and canine was 1.32 ±0.20,1.10 ±0.24 and 1.21 ±0.19 respectively;the thickness(mm)of mucosa of the teeth was 0.69 ±0.17,0.52 ±0.16 and 0.59 ±0.15;the mucosal widths(mm)of alveolar ridge of the teeth was 3.18 ±0.45,3.00 ±0.44 and 3.07 ±0.40,respectivelyr.Males had thicker mucosa than females(P<0.05),and the thickness was positively associated with BMI (r=0.376,P<0.05).CONCLUSION:The thickness of labial gingiva increases from crown to root direction.Gingiva was thicker than alveolar mucosa.Males have thicker labial alveolar mu-cosa than females.The thickness of alveolar mucosa was positively associated with BMI.%目的:测量上颌前牙唇侧黏膜厚度,分析其与性别及体质量指数(BMI)的相关性。方法:选择健康汉族青年男45人,女55人为研究对象,推开唇颊组织,用锥形束CT对颌面部扫描并三维重建,测量上颌前牙唇侧龈缘至牙槽嵴顶牙龈及牙槽嵴顶至其根方3 mm范围的黏膜厚度和龈缘至牙槽嵴顶的牙龈宽度。分析黏膜厚度的性别组间差异及与BMI的相关性。结果:

  6. Esthetic solution to malpositioned implants with remodeling of soft tissue: a case report.

    Science.gov (United States)

    Valente, Mariana Lima da Costa; Marcantonio, Elcio; Faeda, Rafael Silveira; de Paula, Wagner Nunes; Dos Reis, Andréa Cândido

    2016-01-01

    This article describes a clinical case of gingival conditioning with provisional fixed prostheses to improve the esthetics of the soft tissues adjacent to fixed prostheses placed on malpositioned implants. Gradual application of pressure to the tissues is an easy, nontraumatic technique for inducing formation of papillae and reestablishing the appropriate shape and contour of the gingival tissues, thereby improving esthetics and phonetics. The proposed treatment proved to be effective in remodeling the surrounding soft tissues, providing suitable contours, and restoring esthetics and function lost due to surgical treatment with malpositioned implants.

  7. Malpositioned Osseointegrated Implants Relocated with Segmental Osteotomies : A Retrospective Analysis of a Multicenter Case Series with a 1-to 15-Year Follow-Up

    NARCIS (Netherlands)

    Stacchi, Claudio; Chen, Stephen T.; Raghoebar, Gerry M.; Rosen, Daren; Poggio, Carlo E.; Ronda, Marco; Bacchini, Marco; Di Lenarda, Roberto

    2013-01-01

    Purpose: This multicenter case series evaluates retrospectively the clinical outcomes of malpositioned implants surgically relocated in a more convenient position by segmental osteotomies. Materials and Methods: Authors who published, on indexed journals or books, works about malpositioned implant

  8. 手术导萌联合正畸矫治治疗小儿上颌前牙埋伏阻生的疗效分析%Analysis of the Effect of Surgical Guide Eruption Combined With Orthodontic Treatment in the Impacted Maxillary Anterior Teeth of Children

    Institute of Scientific and Technical Information of China (English)

    丁志民

    2015-01-01

    Objective To explore the curative effect of surgical guide eruption combined with orthodontic treatment for the impacted maxil ary anterior teeth in children. Methods The effect and safety of treatment in 78 cases(86 teeth)of children with anterior teeth impacted by impacted maxil ary teeth were observed,who were treated with surgical flap guided eruption combined with orthodontic treatment in recent years. Results The success rate was 94.2%. The results showed that there was no serious complication in the dental pulp and periodontal tissues. Conclusion Surgical guide eruption combined with orthodontic treatment were effective for the treatment of the impacted maxil ary teeth in children,easy to pul in place,and the treatment effect is satisfied.%目的:探究手术导萌联合正畸矫治治疗小儿上颌前牙埋伏阻生的疗效。方法对近年我院收治的小儿上颌前牙埋伏阻生患儿78例(86颗)行手术翻瓣导萌联合正畸矫治治疗,观察矫治效果和安全性。结果患牙矫治成功率为94.2%,复查显示牙髓及牙周组织未发生严重并发症。结论该联合术式治疗小儿上颌前牙埋伏阻生的疗效确切,易牵引到位,可获得满意的矫治效果。

  9. Clinical evaluation of IPS e.max porcelain laminate veneer on anterior teeth%前牙IPS e.max全瓷贴面修复临床效果评价

    Institute of Scientific and Technical Information of China (English)

    彭文军; 刘党利; 赵艳英; 赵红宇

    2011-01-01

    目的 通过定期复诊观察,评价IPS e.max全瓷贴面修复的临床效果,并对出现的问题进行分析.方法 对39例患者89颗牙齿行IPS e.max全瓷贴面修复后,分别于12个月(89颗)、24个月(52颗)对修复体完整性、颜色协调性、边缘适合性、牙龈健康状况及牙齿敏感等方面进行观察比较,并评价临床效果.结果 12个月后89颗贴面中92.3%保持完整性,89.89%具有良好的边缘适合性,93.26%颜色保持一致,89.89%牙龈保持健康,但是有13.48%出现了牙齿敏感;24个月后52颗贴面中的90.38%保持了贴面的完整性,边缘适合性良好和牙龈健康的均占94.23%,无变色和牙齿敏感现象出现.结论 IPS e.max全瓷贴面能较好地满足临床牙齿美容需求,是一种良好的美容修复手段.%Objective To analyze the outcome of 89 IPS e. Max porcelain veneers cemented with Variolink II for 12 and 24 months. Methods Evaluated the marginal adaption, shape integrity, color match, tooth sensitivity and gingival health after porcelain laminate veneers were bonded to the anterior teeth, 89 for 12 months and 52 for 24 months. Results After 12 months cementation, 92. 3% of 89 veneers kept their integrity, 89.89% of which produced fine marginal adaption, 93.26% matched teeth well on color, and 89. 89% kept good gingival health. But tooth sensitivity was found within 13.48% of them. 24 months later, still 90.38% preserved shape integrity, 94.2% maintained good gingival health and marginal adaption. All studied veneers showed color stability and no tooth sensitivity was found. Conclusions When bonded to enamel substrate, IPS e. Max veneer can offer perfect restoration with low failure percentage, and well meet the clinical aesthetic needs.

  10. Surgical relocation of a malpositioned, unserviceable implant protruding into the maxillary sinus cavity. A clinical report.

    Science.gov (United States)

    Stacchi, Claudio; Bonino, Marco; Di Lenarda, Roberto

    2012-08-01

    Malpositioned implants always result in significant mechanical and aesthetic restorative challenges. This case report describes the correction of position of an unserviceable osseointegrated implant also protruding into the maxillary sinus cavity. This surgical technique facilitated the relocation of an implant-bony segment into a more favorable aesthetic and biomechanical position in a single stage surgery.

  11. A three dimensional finite element analysis on en-masse retraction of maxillary anterior teeth by rocking-chair archwire in sliding mechanics%摇椅弓滑动法整体内收上颌前牙的三维有限元分析

    Institute of Scientific and Technical Information of China (English)

    安晓莉; 陈宏伟; 司庆宗; 周又和; 刘斌; 王记增

    2013-01-01

    Objective To investigate the effect of en-masse retraction of maxillary anterior teeth by rocking-chair archwire (RCA) in sliding mechanics. Methods The three dimensional finite element model of maxillary teeth was created based on spiral CT data of a patient by ANSYS software. The forces on each tooth and the torques on the six center of resistance (CR) of the anterior teeth induced by the deformation of RCA with different depth and anterior retraction hook (ARH) with different height were calculated when retracted from a mini-implant between the first molar and the second premolar. The movements of anterior teeth were observed combining different depth of RCA with different height of ARH. Results The clockwise torque in sliding mechanics to realize en-masse retraction of the anterior teeth could be counterbalanced by RCA of certain depth. The combination of 7.2 mm ARH and 2 mm RCA can be used to intrude and retract maxillary anterior teeth under the condition of applying mini-implant. Conclusion The excessive retraction that usually exists in traditional treatments can be avoided by RCA in sliding mechanics and intrusion and torque control during anterior segment retraction can also be achieved by this method.%目的 探讨摇椅弓应用于滑动法内收上颌前牙的力学效应.方法 应用ANSYS软件建立上牙列三维有限元模型,分别计算不同深度摇椅弓和不同高度牵引钩内收上前牙时对6个上前牙阻抗中心产生的转矩,并观察二者联合应用时上前牙初始移动情况.结果 选择不同深度的摇椅弓可产生不同的冠唇向转矩,用以抵消摩擦力及不同高度牵引钩滑动法内收产生的冠舌向转矩,进而实现上前牙的整体移动.在上颌第二前磨牙和第一磨牙之间应用种植体支抗时,2 mm深度的摇椅弓可配合使用7.2 mm高度的牵引钩来实现上前牙的压低及整体内收.结论 摇椅弓可以有效改善内收前牙时出现的直立和舌倾状态,实现压低和转矩的双重控制.

  12. Delayed replantation of avulsed teeth

    Directory of Open Access Journals (Sweden)

    Adil N

    2007-05-01

    Full Text Available Dental injuries are very common and their extent has been classified by Ellis. Avulsion of tooth is a grievous injury and ranges from 1-16% among the traumatic injuries, of which maxillary anterior are commonest. Reimplantation of avulsed teeth is a standard procedure. However, it has certain limitations. Most often their management is very challenging. In this case report we are presenting the management of maxillary incisors by replantation after 36 hrs in a 12 year old girl.

  13. Revisions for screw malposition and clinical outcomes after robot-guided lumbar fusion for spondylolisthesis.

    Science.gov (United States)

    Schröder, Marc L; Staartjes, Victor E

    2017-05-01

    OBJECTIVE The accuracy of robot-guided pedicle screw placement has been proven to be high, but little is known about the impact of such guidance on clinical outcomes such as the rate of revision surgeries for screw malposition. In addition, there are very few data about the impact of robot-guided fusion on patient-reported outcomes (PROs). Thus, the clinical benefit for the patient is unclear. In this study, the authors analyzed revision rates for screw malposition and changes in PROs following minimally invasive robot-guided pedicle screw fixation. METHODS A retrospective cohort study of patients who had undergone minimally invasive posterior lumbar interbody fusion (MI-PLIF) or minimally invasive transforaminal lumbar interbody fusion was performed. Patients were followed up clinically at 6 weeks, 12 months, and 24 months after treatment and by mailed questionnaire in March 2016 as a final follow-up. Visual analog scale (VAS) scores for back and leg pain severity, Oswestry Disability Index (ODI), screw revisions, and socio-demographic factors were analyzed. A literature review was performed, comparing the incidence of intraoperative screw revisions and revision surgery for screw malposition in robot-guided, navigated, and freehand fusion procedures. RESULTS Seventy-two patients fit the study inclusion criteria and had a mean follow up of 32 ± 17 months. No screws had to be revised intraoperatively, and no revision surgery for screw malposition was needed. In the literature review, the authors found a higher rate of intraoperative screw revisions in the navigated pool than in the robot-guided pool (p robot-guided procedures (p robotic guidance to reduce the rate of revision surgery for screw malposition as compared with other techniques of pedicle screw insertion described in peer-reviewed publications. Larger comparative studies are required to assess differences in PROs following a minimally invasive approach in spinal fusion surgeries compared with other

  14. The Impact of Two Kinds of Immediate Dental Implant for Maxillary Anterior Teeth on the Soft and Hard Tissues in Patients With Oral Cavity%两种上颌前牙即刻牙种植术对患者口腔内软硬组织的影响

    Institute of Scientific and Technical Information of China (English)

    刘龙坤

    2015-01-01

    目的:探讨翻瓣与不翻瓣两种上颌前牙即刻牙种植术对患者口腔内软硬组织的影响。方法选取我院近年来收治行上颌前牙即刻牙种植术患者140例,采用随机数字表法分为A组和B组,各70例,分别采用翻瓣与不翻瓣上颌前牙即刻牙种植术治疗;比较两组患者种植成活率、手术时间、牙槽骨长度及术后并发症发生率等。结果 B组患者手术时间和牙槽骨长度均优于A组,P<0.05,差异具有统计学意义。B组患者术后并发症发生率低于A组,P<0.05,差异具有统计学意义。结论相较于翻瓣上颌前牙即刻牙种植术,不翻瓣上颌前牙即刻牙种植术可有效缩短手术时间,提高种植成活率,并有助于降低并发症发生风险。%Objective To investigate the effects of two kinds of immediate dental implant for maxillary anterior teeth including lfap and non-lfap on the soft and hard tissues in patients with oral cavity.MethodsSelected 140 patients with immediate dental implant for maxillary anterior teeth in our hospital were randomly divided into both group including A group and B group, each group had 70 cases, respectively with immediate dental implant for maxillary anterior teeth including lfap with immediate dental implant for maxillary anterior teeth including non-flap, and the survival rate of implantation, operation time, the length of alveolar bone and postoperative complication incidence of both groups were compared. ResultsThe operation time and the length of alveolar bone of B group was better than A group,P<0.05, had difference statistically signiifcance. The postoperative complication incidence of B group was significantly better than A group,P<0.05, had difference statistically signiifcance.Conclusion Compared with immediate dental implant for maxillary anterior teeth by flap, immediate dental implant for maxillary anterior teeth by non-flap can efficiently shorten the operation time, improve

  15. 树脂短桩结合透明冠修复上颌乳前牙残冠的临床观察%Clinical observation of resin short post combined with strip crown to restore the residual crown of maxillary deciduous anterior teeth

    Institute of Scientific and Technical Information of China (English)

    李文敏; 闫长山; 秦帅华

    2016-01-01

    Objective To observe the clinical effect of resin short post combined with strip crown to restore the residual crown of maxillary deciduous anterior teeth. Methods Select 75 residual crown of maxillary deciduous anterior teeth which were removed all of dental caries and accepted root canal therapy, and then treat them by short post core restoration with composite resin, combined with strip crown to restore the shape. Results Reexamination after 4 years showed 71 cases succeed and 4 cases failed, the success rate is 94.7%. Conclusion The method of the composite resin short pile combined with transparent crown is used to restore the residual crown of maxillary deciduous anterior teeth is reliable and suitable for clinical application.%目的:观察树脂短桩结合透明冠的方式修复上颌乳前牙残冠的临床效果。方法:选择75颗乳上前牙残冠,去净龋坏并行根管充填后,用复合树脂做短桩核修复,再结合透明冠恢复外形。结果:4年后复查,成功71颗,失败4颗,成功率94.7%。结论:采用复合树脂短桩联合透明冠的方式修复上颌乳前牙残冠,效果可靠,适合临床推广使用。

  16. 数字化口腔修复(13)--消除前牙黑三角的数字化笑设计(附病例报告)%Digital restorative dentistry and prosthodontics(13)---Digital smile design of eliminating the black triangle in anterior teeth (a case report)

    Institute of Scientific and Technical Information of China (English)

    陶娴; 姚江武

    2016-01-01

    Objective:To use computer aided design (CAD) changing the location of proximal contact point in crowns and pre-restorative digital smile design in order to get better communication and satisfaction with the patients. Method:One patient with anterior teeth broken and chronic periodontitis with the black triangle, would be proceed in all-ceramic crown restoration by two-dimensional digital smile design (2-DDSD) and three-dimensional smile designs (3-DDSD) via Photoshop CS6 software and CEREC®AC Omnicam 4.2 software. Result:Via comparison of the virtual images of 2- and 3-DDSD, both patient and dentist reached consensus on the images of the teeth morphology which were changed from triangle to square. Because of that the black triangles in anterior teeth were disappeared completely, this restoration was the most satis-faction. Conclusion:2- and 3-DDSD were effective communication channel and method. Meanwhile, changing the teeth morphology via moving proximal contact point contributed to eliminate the black triangle in anterior teeth.%目的:通过计算机辅助设计,改变修复体邻面接触点的位置,并进行修复前的数字化笑设计,以获得与患者良好的沟通。方法:利用Photoshop CS6软件和CEREC®AC Omnicam 4.2软件分别对1例冠折且伴有慢性牙周暴露“黑三角”的患者行全瓷冠修复和二维/三维数字化笑设计。结果:经过患者和口腔医师共同比较二维和三维数字化笑设计的虚拟图像,双方达成共识,即牙齿的基本形态由三角形改为方形,消除了“黑三角”,修复后效果最为满意。结论:医患双方共同参与的修复前二维和三维数字化笑设计是行之有效的沟通渠道和手段,同时通过移动邻面接触点改变牙齿基本形态的方法有利于消除前牙“黑三角”。

  17. 上颌前牙美学区连续多颗牙缺失即刻种植的临床研究%Clinical study on immediate implant of multiple adjacent teeth in maxillary anterior esthetic zone

    Institute of Scientific and Technical Information of China (English)

    祝岩; 万澎波; 赵伟; 邵元霞; 魏抗抗; 刘瑾; 刘军祥

    2016-01-01

    形切口为相邻多颗牙即刻种植的应用技巧提供了临床依据,值得临床推广。%Objectives To analyze the influence of different dental implant systems utilized for immediate implant in maxillary es⁃thetic zone on peri⁃implant bone resorption, and to investigate the techniques and esthetic factors of applying the improved minimally invasive H⁃shaped notch to the immediate implant of multiple adjacent teeth in maxillary anterior esthetic zone. Methods 58 patients who were subjected to dental implantation and restoration from January 2011 to January 2015 were included in the study. The improved minimally invasive H⁃shaped notch was used in all the patients. Based on the implanted dental systems, they were divided into three groups:group 3I, group DIO, and group Replace. The follow⁃up time was 12 months, during which their peri⁃implant bone resorption, probing depth, and sulcus bleeding index after surgery were observed. The gingival marginal tissue recessions were analyzed according to Miller’ s classification and interproximal papillae was analyzed according to Jemt’ s classification. The stability of the implants was analyzed according to Albrektsson’ s criteria of success. Results Six months after surgery, the peri⁃implant bone resorption of patients in all groups was stable, showing no significant differences among different dental implant systems (P>0.05), but the peri⁃implant bone resorption of different dental implants increased differently that the bone resorption of group DIO in the 3rd month was evidently higher than that of group Replace and group 3I, which was statistically significant (P0.05);in 9th and 12th months, com⁃pared with natural teeth, the differences of sulcus bleeding index were still not statistically significant ( P>0.05) . six months after surg⁃ery, the probing depth in all the groups was stable and was slightly higher than natural teeth at various periods, but the difference was not

  18. 成人骨性Ⅱ类错牙合不同垂直骨面型前牙区牙槽骨形态的 CBCT 研究%A cone-beam CT study on alveolar bone morphology in anterior teeth area of adult skeletal Class Ⅱ mal-occlusion subjects with different vertical skeletal types

    Institute of Scientific and Technical Information of China (English)

    季海宁; 梁源; 隋珂; 高麒; 丁寅

    2016-01-01

    目的:应用锥形束 CT(CBCT)研究成人骨性Ⅱ类错(牙合)患者前牙区牙槽骨形态特征及垂直骨面型对其的影响。方法:纳入64名成人骨性Ⅱ类错(牙合)患者,对照组选择正常(牙合)15名,进行锥形束 CT 的拍摄,对前牙区牙槽骨各项数据进行对比分析;并将骨性Ⅱ类错(牙合)患者根据垂直骨面型的不同进行分组整理分析。结果:骨性Ⅱ类错(牙合)患者前牙区唇舌侧牙槽骨高度及厚度均低于对照组(P <0.05)。骨性Ⅱ类错(牙合)高角组患者前牙区唇舌侧牙槽骨高度、牙槽骨厚度均低于低角组(P <0.05)。结论:骨性Ⅱ类错(牙合)患者前牙区牙槽骨厚度尤其是切牙区牙槽骨厚度较低,高角组低于低角组。%Objective:To study the alveolar bone morphology in the anterior teeth area of the skeletal Class Ⅱ malocclusion subjects with different vertical skeletal types.Methods:64 patients with skeletal Class Ⅱ malocclusion and 15 subjects with normal occlusion were included.The alveolar bone structure of the anterior teeth were observed using CBCT.Results:The labial and lingual alveolar bone height and the alveolar bone thickness of the incisors of the patients were much lower than those of the normal controls.The height of labial and lingual alveolar bone and the alveolar bone thickness of anterior teeth in high-angle subgroup were lower than those in low-angle subgroup.Conclusion:The thickness of the anterior teeth alveolar bone of skeletal Class Ⅱ malocclusion is low,espe-cially in the high-angle group.

  19. 应用锥形束CT评价前牙唇舌侧牙槽骨高度及厚度的研究%Evaluation of quantitative measurement of labial and lingual alveolar height and thickness in anterior teeth by cone-beam computed tomography

    Institute of Scientific and Technical Information of China (English)

    钟金晟; 柳登高; 欧阳翔英; 谢晓艳

    2012-01-01

    Objective To evaluate the accuracy of in vitro and in vivo measurement of labial and lingual alveolar height and thickness in anterior teeth by cone-beam computed tomography ( CBCT). Methods Anterior teeth sockets in 10 dry mandibles were examined by CBCT, and the alveolar height and thickness were measured and compared with direct measurement. Twenty-two anterior teeth, that had been determined to extract, were examined by CBCT, and the alveolar height and thickness were measured and compared with direct measurement after the extraction. Results In vitro experiments , no significant difference was found between the data obtained by CBCT and direct measurements ( P > 0.05 ) . In vivo experiments, no significant difference was found between the data obtained by CBCT and direct measurements except for the labial alveolar height. The difference might be caused by the trauma from the extraction and patient mobility during the projection. Conclusion CBCT could provide accurate information of labial and lingual alveolar height and thickness in anterior teeth.%目的 评价锥形束CT(CBCT)在体内外定量测量前牙唇舌侧牙槽骨高度及厚度的准确性.方法 体外实验利用CBCT测量10个干下颌骨下前牙牙槽窝的高度和厚度,并与直接测量结果进行比较;体内实验选取待拔除的22颗前牙,拔除前使用CBCT测量牙槽骨的高度和厚度,并与拔除后即刻直接测量的结果进行比较.结果 体外实验CBCT与直接测量结果之间的差异无统计学意义(P>0.05);体内实验CBCT对唇侧牙槽骨厚度测量结果大于CBCT测量结果(P<0.05),而其他3个参数二者之间的差异无统计学意义,造成差异的原因可能与拔牙的损伤和CBCT拍摄过程中患者的移动有关.结论 CBCT可以较好地反映前牙唇舌侧牙槽骨高度和厚度的实际情况.

  20. 口腔临床新兴实用技术学习班通知玻璃纤维桩修复前牙牙体缺损的临床效果比较%Comparision of the clinical effects of glass-fiber post on endodontically treated anterior teeth with varying ferrule heights and configurations

    Institute of Scientific and Technical Information of China (English)

    田菊忠; 王宏

    2011-01-01

    目的 探讨不同程度前牙牙体缺损玻璃纤维桩核修复的临床疗效.比较前牙重度牙体缺损运用冠延长术和未运用冠延长术后玻璃纤维桩修复的临床效果.方法 临床选择182例前牙缺损患者的共295颗患牙,按牙体缺损程度分3类:Ⅰ类、Ⅱ类和Ⅲ类,按缺损程度所有患牙分为A、B、C、D、E五组,A组为Ⅰ类牙体缺损62颗,B组为Ⅱ类牙体缺损77颗,C组为Ⅲ类牙体缺损并保留2 mm以上牙本质肩领的患牙59颗,D组为Ⅲ类牙体缺损48颗,E组为Ⅲ类牙体缺损49颗,A、B、C、D四组均采用玻璃纤维桩核修复,E组采用牙冠延长术牙体颈部获得至少2 mm大小的牙本质肩领后采用玻璃纤维桩核修复.结果 A、B、C、D、E各组治疗成功率分别为100%、100%、96.6%、85.4%、97.9%,其中A、B、C、E四组之间两两比较无显著性差异(P>0.05),D、E两组之间比较有显著性差异(P<0.05).结论 前牙牙体缺损颈部留有至少2 mm大小的牙本质肩领,玻璃纤维桩核修复能达到较好的效果,牙冠延长术后玻璃纤维桩核能有效修复重度前牙缺损.%Objective To study the clinical effects of glass-fiber post on anterior teeth with varying ferrule heights and configurations. To compare the clinical effects of glass-fiber post following surgical crown lengthening or not on severe anterior teeth defect.Methods 295 anterior teeth with varying ferrule heights were divided into Ⅰ、Ⅱ、Ⅲ degree teeth defects. All teeth were divided into five groups: A、B、C、D、E. Group A:62 teeth with Ⅰ degree defect; Group B :77 teeth with Ⅱ degree defect; Group C :59 teeth with Ⅲ degree defect; Group D:48 teeth with Ⅲ degree defect; Group E:49 teeth with Ⅲ degree defect; The groups of A、B、C、D were restored with glass-fiber post; The teeth of group E gained ferrule no less than 2mm following surgical crown lengthening and were restored with glass-fiber post. Results The success rates of group A

  1. 超声骨刀行冠延长术后纤维桩修复上颌前牙的临床应用%Clinical application of fiber posts in restoring maxillary anterior teeth after surgical crown lengthening by piezosurgery

    Institute of Scientific and Technical Information of China (English)

    李张维; 康成容; 吴妹娟; 王玉栋; 潘宣

    2015-01-01

    目的 观察保留冠折位于龈下的上颌前牙残根残冠,使用超声骨刀行冠延长术后纤维桩修复的临床疗效.方法 27例患者共32颗患牙,经完善的根管治疗后使用超声骨刀行冠延长术,术后6周复诊,采用纤维桩、双固化树脂水门汀及复合树脂材料恢复桩核,二氧化锆烤瓷冠修复.术后通过临床和X线片检查评估修复体的临床疗效.结果 27例患者的32颗患牙经过1~3年期间的随访检查,成功29颗(90.6%),失败3颗(9.4%).结论 超声骨刀应用于上颌前牙冠延长术,并联合纤维桩修复,可取得良好的治疗效果.%Objective To observe the clinical effects of fiber posts in restoring maxillary anterior teeth after surgical crown lengthening by piezosurgery. Methods After root canal therapy, 32 teeth from 27 patients were lengthened with piezosurgery. After 6 weeks, they were restored by fiber posts, dual cure resin cement, composite res-in material. And then, zirconia crowns were applied to restore them. The patients were observed the restoration effects by clinical results and X-ray. Results The 32 teeth from 27 patients were followed up for 1~3 years, with 29 teeth successfully restored (90.6%) and 3 teeth unsuccessfully restored (9.4%). Conclusion A satisfactory treatment ef-fects could be achieved by surgical crown lengthening with piezosurgery and fiber posts in restoring maxillary ante-rior teeth.

  2. Wisdom Teeth Management

    Science.gov (United States)

    Wisdom Teeth Management Wisdom teeth, or third molars, are the last teeth to develop and appear in your mouth. They come ... of third molars, disease status, and to suggest management options ranging from removal to a monitored retention ...

  3. Wisdom Teeth Management

    Science.gov (United States)

    Wisdom Teeth Management Wisdom teeth, or third molars, are the last teeth to develop and appear in your mouth. They come ... of third molars, disease status, and to suggest management options ranging from removal to a monitored retention ...

  4. 汉族青年人上颌前牙牙根位置及牙槽骨厚度的测量分析%Measurement of sagittal root position and the thickness of the facial and palatal alveolar bone of maxillary anterior teeth

    Institute of Scientific and Technical Information of China (English)

    杨刚; 胡文杰; 曹洁; 柳登高

    2013-01-01

    Objective To classify the relationship of the sagittal root positions of the maxillary anterior teeth to their respective osseous housings,and to measure the thickness of facial and palatal alveolar bone by cone-beam computed tomography(CBCT).Methods Twenty-three subjects [9 male,14 female,mean age:(24.5 ± 1.6) years] who fulfilled the inclusion criteria were involved in this study.The CBCT images were evaluated and the relationship of the sagittal root position of the maxillary anterior teeth to its associated osseous housing was recorded as Kan's Class 1,2,3,4.The facial and palatal alveolar bone thickness at three locations:2 mm apical to crest level,mid-root level and apical level,was measured respectively.Results Ninety seven point one percent(134/138) of the anterior maxillary teeth were classified as Class 1.Only 2.9% (4/138) were Class 4.Occurrences of >2 mm thickness of maxillary facial alveolar bone were found 2.2% (6/276 sites) at 2 mm apical to crest level and mid-root level in the sample of maxillary anterior teeth.Conclusions The majority of the anterior maxillary teeth roots were positioned close to the labial cortical plate.Most tooth sites in the anterior maxilla had a thin facial bone wall.%目的 对上颌前牙牙根与牙槽骨在矢状向的位置关系进行分类,测量上颌前牙唇腭侧牙槽骨厚度,为深入了解上颌前牙牙根和牙槽骨的关系提供参考.方法 选择牙周健康的汉族青年23名[男性9名,女性14名,平均年龄(24.5±1.6)岁],对共计138颗上颌前牙拍摄锥形束CT,通过锥形束CT配套软件进行三维重建处理,调整至合适的位置及轴向,定性分析上颌前牙牙根与牙槽骨的矢状向位置关系,并进一步定量测量上颌前牙唇腭侧牙槽骨的厚度.结果 97.1% (134/138)的上颌前牙牙根矢状向位置偏向唇侧骨皮质,2.9% (4/138)的牙根偏向腭侧骨皮质;上颌前牙唇侧正中骨嵴顶下方2 mm和根中部位点仅有2.2%(6/276)

  5. Analysis on self-healing effect of anterior teeth area gingival soft tissue in canine model%前牙区软组织自我修复效果的实验测量观察

    Institute of Scientific and Technical Information of China (English)

    黄伟; 张志宏; 刘红红; 鲍军燕; 张敏; 韩倩; 何华

    2014-01-01

    Residual roots model was conducted in the maxillary anterior teeth area of the canine ( right maxillary lateral incisor and left maxillary central incisor) by grinding dental crown to approximate alveolar ridge top level in subgingival margin and avoiding wearing gingival tissue. The growth of gums was observed in the 1, 3, 4, 5 weeks after surgery through measuring the distance between gingival papilla and adjacent regions spire, the vertical dis-tance between gingival papilla and the level of the adjacent regions spire, the distance between the modpoint of gin-gival margin and adjacent tooth spire and the vertical distance between the modpoint of gingival margin and the level of the adjacent regions spire. All the statistical analyses for experimental data were performed by SPSS statistical software. The results showed hyperplasia of the gum tissue in the fourth week after surgery was nearly full of residu-al root fracture, and no color and texture difference was found between the gum tissue in the fifth week after surgery and normal gum. According to data the growth of gum tissue was toward the direction of hyperplasia during the ob-servation period. This study shows that gums have some certain ability of self-healing in the case of no damage, and the residual root tissue can complete self-healing in 4 weeks.%在犬的上颌前牙区(右上颌侧切牙、左上颌中切牙)制造残根模型,将牙冠磨至龈缘下约平齐牙槽嵴顶水平,避免磨损牙龈软组织,术后第1、3、4、5周观察其牙龈生长情况,测量龈乳头至邻牙牙尖顶的距离、龈乳头至邻牙牙尖顶的水平面的垂直距离、龈缘中点至邻牙牙尖顶的距离、龈缘中点至邻牙牙尖顶的水平面的垂直距离。利用SPSS软件对测量的实验数据进行线图分析。结果显示术后第4周增生的软组织基本长满残根断面,术后第5周新生的软组织与正常牙龈在颜色、质地上基本一致,测量数据显示在观察周期

  6. Malposition and revision rates of different imaging modalities for percutaneous iliosacral screw fixation following pelvic fractures

    DEFF Research Database (Denmark)

    Zwingmann, Jörn; Hauschild, Oliver; Bode, Gerrit;

    2013-01-01

    INTRODUCTION: Percutaneous iliosacral screw placement following pelvic trauma is associated with high rates of revisions, screw malpositioning, the risk of neurological damage and inefficient stability. The correct entry point and the small target corridor may be difficult to visualize using only...... an image intensifier. Therefore, 2D and 3D image-based navigation and reconstruction techniques could be helpful tools. The aim of this systematic review and meta-analysis was to evaluate the best available evidence regarding the rate of malpositioning and revisions using different techniques for screw...... implantation, i.e., conventional, 2D and 3D image-based navigation and reconstruction techniques, CT navigation. METHODS: A systematic review and meta-analysis were performed using the data available on Ovid Medline. 430 studies published between 1/1948 and 2/2011 were identified by two independent...

  7. Free Nipple Graft Technique to Correct Nipple and Areola Malposition after Breast Procedures

    Directory of Open Access Journals (Sweden)

    Mario Rietjens, MD

    2013-11-01

    Full Text Available Summary: Secondary correction of nipple areola complex (NAC malposition represents a major concern after breast reconstructive procedures. It is frequently requested by patients complaining about asymmetric areolas impairing the whole reconstructive procedure and asking for improved cosmetic outcomes. Several methods have been described to achieve a good symmetry between the 2 areolas, either natural or reconstructed. We describe our correction technique with free NAC graft. A total of 16 patients were treated with free NAC grafts between April 2010 and April 2013 at the European Institute of Oncology, Milan, Italy. This series focused on the surgical technique and its postoperative outcomes. Three cases of partial graft loss (18% were observed in the postoperative period. No total NAC necrosis occurred. No infection was observed. All the complications were managed with a conservative treatment, not requiring any further surgery. NAC malposition following breast reconstructive procedures can be corrected using the technique of free NAC graft with reliable and satisfactory results.

  8. Percutaneous retrieval of malpositioned, kinked and unraveled guide wire under fluoroscopic guidance during central venous cannulation

    Directory of Open Access Journals (Sweden)

    Gopal Krishan Jalwal

    2014-01-01

    Full Text Available The placement of central venous catheter using Seldinger′s technique, remains a commonly performed procedure with its own risks and benefits. Various complications have been reported with the use of guide wire as well as catheter. We report a unique problem during subclavian vein cannulation due to guidewire malposition which led to its kinking and difficult retrieval requiring removal in fluoroscopy suit. The probable mechanism of guide wire entrapment and possible bedside management of similar problems is described.

  9. Anatomically corrected malposition of the great arteries--case reports and a review.

    Science.gov (United States)

    Oku, H; Shirotani, H; Yokoyama, T; Kawai, J; Nishioka, T; Noritake, S; Shinohara, T; Nakamura, Y; Sunakawa, A; Oka, H; Saga, T; Horio, S; Wakaki, N

    1982-06-01

    Anatomically corrected malposition of the great arteries (ACM) is an extremely uncommon cardiac disease in which the great arteries arise from their appropriate ventricles despite abnormal spatial interrelations. Two patients with this malformation underwent successful surgical intervention for their associated anomalies. One was of situs solitus, d-loop and l-malposition and the other of situs inversus, l-loop and d-malposition of the great arteries. Fifty-three cases with accurate anatomical description were collected from the literature, and anatomical characteristics and associated anomalies were investigated. From the standpoint of anatomy and hemodynamics, we considered that ACM should be classified into atrioventricular concordant ACM, atrioventricular discordant ACM and ACM with situs ambiguus. Heart position and conus were variable. Dextrocardia and mesocardia were frequent. Bilateral conus was characteristic in concordant ACM, and subpulmonary conus was prominent in discordant ACM. The hypoplasia of the right heart and juxtaposition of the atrial appendages were in high incidence in cases of ACM. Surgical intervention was also discussed.

  10. Radionuclide angiocardiography in the clinical evaluation of cardiac malpositions in situs solitus in adults.

    Science.gov (United States)

    Guit, G L; Kroon, H M; Chin, J G; Pauwels, E K; van Voorthuisen, A E

    1986-04-01

    A right-sided position of the heart in the chest in situs solitus is an abnormal feature easily discernible from a plain chest radiograph. This cardiac malposition may be due to cardiac displacement (dextroposition), which is usually a feature of lung disease, or a structural abnormality of the heart (dextrocardia). Because each condition has different clinical pathologic implications, it is important to distinguish them. Chest films, however, often provide no conclusive information. We performed radionuclide angiocardiography (RNA) in six adults with a cardiac malposition in situs solitus. It was found that morphologic data obtained from the serial images may distinguish dextroposition from dextrocardia. In addition, these images permitted us to diagnose congenitally corrected transposition, a cardiac anomaly which occurs with increased frequency in situs solitus with dextrocardia. Quantitative shunt detection performed during this procedure is helpful in the differential diagnosis of dextroposition and able to distinguish uncomplicated dextrocardia from dextrocardia associated with other cardiac abnormalities. RNA therefore is a valuable and easily performed method in the analysis of cardiac malpositions in adults.

  11. Clinical application of the surgical crown lengthening combining all ceramic crown after failure of the anterior teeth PFM crown restoration%牙冠延长术结合全瓷冠修复在前牙烤瓷冠失败病例的应用

    Institute of Scientific and Technical Information of China (English)

    李雪峰

    2013-01-01

    目的:探讨应用牙冠延长术结合全瓷冠技术治疗前牙生物学宽度不足导致不良烤瓷冠修复的临床疗效。方法选取26例因生物学宽度不足导致的前牙修复失败病例,进行完善牙周治疗,根管治疗,并进行牙冠延长术后全瓷冠修复,观察术前,术后六周以及修复后三个月以及修复六个月的PD(探诊深度), SBI(出血指数)并予以记录。结果24例患者治疗效果较好,两例术后牙龈高度不对称,患者不甚满意。结论牙冠延长术结合全瓷冠修复可以较好的解决前牙不良烤瓷冠修复的再治疗问题。%Objective To investigate the effect after crown lengthening surgery combining all ceramic crown on anterior teeth failure of PFM crown restoration because of insufficient biological width Methods Select 26 failure cases of anterior teeth caused by insufficient biological width , repair to perfect the periodontal treatment, root canal treatment, and crown lengthening surgery. After treatment all teeth were restored by all ceramic crown, At baseline, 6 weeks after surgery and 3 months and 6 months after the restoration BOP and PD were recorded and analyzed. Results 24 patients treatment effect is good, two cases of postoperative were not very satisfied because of gum hight asymmetric. Conclusion Crown lengthening sursery combining all ceramic crown restoration can solve the failure PFM restoration on anterior teeth.

  12. Comparison of the clinical value of porcelain veneer and all ceramic crowns in the restoration of anterior teeth%烤瓷贴面和全瓷冠在前牙美容修复中的临床应用价值比较

    Institute of Scientific and Technical Information of China (English)

    刘卫锋; 刘继华; 闫慧鑫; 王生党; 王垚

    2015-01-01

    目的:旨在比较烤瓷贴面和全瓷冠在前牙美容修复中的临床效果。方法选择2012年1月至2013年1月在我院接受烤瓷贴面和全瓷冠前牙美容修复的患者127例(320颗),根据患者的牙齿情况选择修复材料,其中接受烤瓷贴面修复患者70例(144颗),全瓷冠修复患者57例(176颗),320颗前牙均采用耐火代型技术进行修复,对所有患者随访2年。为了评价2种修复方式在前牙美容中的效果,分别在修复后3个月和24月后比较近期的美容效果和远期的完整性效果。结果经烤瓷贴面和全瓷冠修复后,患者均达到较好的近期美容效果,其主观满意度均达到100%,2种修复方式差异无统计学意义(P=0.51);全瓷冠修复的客观满意度为94.7%,高于烤瓷贴面(90.0%),表明全瓷冠的遮色效果优于烤瓷贴面。修复2年后全瓷冠的完好率仍为100%,烤瓷贴面的完好率为96.0%,二者差异有统计学意义(P=0.04),全瓷冠修复的远期完整性效果更佳。结论烤瓷贴面和全瓷冠对于前牙修复均能收到较好的美容效果,全瓷冠修复的远期完整性效果优于烤瓷贴面修复。%Objective To compare the clinical effects of porcelain veneer and all ceramic crowns in the cosmetic restoration of anterior teeth .Methods One hundred and twenty-seven patients ( 320 teeth ) , who received porcelain veneer and all ceramic crowns in the cosmetic restoration of anterior teeth from January , 2012 to January, 2013 in our hospital were chosen for our study .The repair materials for the patients′teeth were selected in accordance with the patient conditions of the teeth .All the 320 anterior teeth were repaired with refractory generation technology , of which 70 cases (144 teeth) were repaired with porcelain veneer and 57 cases (176 teeth) were repaired with all ceramic crowns , and all the patients had medical follow-ups for 2

  13. O efeito da retração dos dentes anteriores sobre o ponto A em pacientes submetidos ao tratamento ortodôntico corretivo The effect of retraction of anterior teeth on the point A in patients submitted to corrective orthodontic treatment

    Directory of Open Access Journals (Sweden)

    Tien Li An

    2008-04-01

    Full Text Available OBJETIVO: avaliar o efeito da retração anterior sobre o ponto A sagital e verticalmente, bem como a correlação e a previsibilidade do comportamento dessas estruturas. METODOLOGIA: sessenta telerradiografias em norma lateral foram usadas, tomadas no início e no final do tratamento ortodôntico corretivo, a partir de 30 pacientes (22 feminino e 8 masculino com idade entre 10 e 17 anos antes do tratamento, com má oclusão de Classe II, divisão 1 ou Classe I, que foram submetidos às extrações dos quatro primeiros pré-molares ou somente dois primeiros pré-molares superiores. Além das variáveis .1NA,1-NA, 1.PP e 1-A, mensurações lineares horizontais e verticais foram feitas em relação a uma linha de referência construída a partir da linha SN menos 7º e uma linha perpendicular a ela. Todos os dados foram mensurados duas vezes, e as médias foram submetidas ao teste t emparelhado, de correlação linear e de regressão. RESULTADOS: em média, o ponto A retraiu 0,71mm e movimentou para baixo 2,38mm, seguindo 1,03mm e 4,13mm de retração, respectivamente, do ápice radicular e da borda incisal, e 2,35mm de extrusão dentária. A retração do ponto A apresentou correlação positiva em relação ao ápice radicular (r = 0,75; alfa OBJECTIVE: it was aimed to evaluate the effect of retraction of anterior teeth on the point A sagittally and vertically, as well as the correlation and the predictability of the behavior of these structures. METHODS: sixty lateral cephalograms were used, which were taken at the beginning and at the end of fixed appliance orthodontic treatment, from thirty patients (22 female and 8 male aging from 10 to 17 years at baseline, with Class II, Division 1 or Class I malocclusion, who underwent four first premolars extractions or maxillary first premolars extractions only. Besides the variables 1.NA, 1-NA, U1/PP and U1«AVERT, horizontal and vertical linear measurements were made in relation to a horizontal

  14. Supernumerary teeth: Report of four unusual cases

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    Arun Kumar

    2012-01-01

    Full Text Available Supernumerary tooth denotes duplication of tooth in the normal series. It is a developmental anomaly and has been argued to arise from multiple etiologies. These teeth may remain embedded in the alveolar bone or can erupt into the oral cavity. The supernumerary tooth might cause esthetic and/or functional problems, especially if it is situated in the maxillary anterior region. Complications reported were delayed or prevented eruption of succedaneous teeth, displacement or rotation, crowding of the affected region, abnormal diastema, dilacerations, cystic formation, and sometime eruption into the nasal cavity. In this case report, four unusual cases of supernumerary teeth that resulted in varying degrees of disturbances in permanent dentition are presented. Conservative surgical intervention and light orthodontic forces were used to bring the teeth into normal position with minimal disturbance to the surrounding oral structures.

  15. Supernumerary teeth: Report of four unusual cases.

    Science.gov (United States)

    Kumar, Arun; Namdev, Ritu; Bakshi, Lokesh; Dutta, Samir

    2012-04-01

    Supernumerary tooth denotes duplication of tooth in the normal series. It is a developmental anomaly and has been argued to arise from multiple etiologies. These teeth may remain embedded in the alveolar bone or can erupt into the oral cavity. The supernumerary tooth might cause esthetic and/or functional problems, especially if it is situated in the maxillary anterior region. Complications reported were delayed or prevented eruption of succedaneous teeth, displacement or rotation, crowding of the affected region, abnormal diastema, dilacerations, cystic formation, and sometime eruption into the nasal cavity. In this case report, four unusual cases of supernumerary teeth that resulted in varying degrees of disturbances in permanent dentition are presented. Conservative surgical intervention and light orthodontic forces were used to bring the teeth into normal position with minimal disturbance to the surrounding oral structures.

  16. 不同类型胶黏剂联合复合树脂充填修复乳前牙环状龋疗效对比分析%Comparative analysis of curative effect of different types of adhesive combined with com posite resin in iflling repair deciduous anterior teeth cricoid caries

    Institute of Scientific and Technical Information of China (English)

    李菊

    2016-01-01

    目的:研究不同类型胶黏剂联合复合树脂充填修复乳前牙环状龋的临床效果,以期提高乳前牙环状龋的治疗效果。方法选取本院2013年7月至2014年3月治疗的35例乳前牙环状龋患儿(108颗患牙)为研究对象,随机将其分为观察组(18例,55颗患牙)和对照组(17例,53颗患牙)。观察组患儿应用新型混合型胶黏剂联合复合树脂充填修复患牙,对照组患儿采用自酸蚀牙本质胶黏剂联合复合树脂充填修复患牙。分别于修复后6个月和12个月进行随访,比较两组患儿的治疗效果。结果观察组患儿患牙修复体固位、边缘密合性、牙髓活力评分均显著低于对照组(P<0.05)。结论新型混合型胶黏剂联合复合树脂对乳前牙环状龋充填修复的临床效果优于自酸蚀牙本质胶黏剂联合复合树脂,是较理想的治疗方案,值得临床推广应用。%ObjectiveTo investigate the clinical effect of composite resinfilling restoration with different adhesives in deciduous anterior teeth cricoid caries, so as to improve the curative effect.MethodFrom July 2013 to March 2014, 35 cases (108 involved teeth) of children with deciduous anterior teeth cricoid caries were selected as the research objects and were randomly divided into observation group (18 cases, 55 involved teeth) and control group (17 cases, 53 involved teeth). Observation group applied composite resin with new mixed adhesive asfilling restoration materials and control group applied composited resin with self-etching dentin adhesive. Evaluated the clinical effect of both groups.ResultThe scores of observation group on retention of restorations, marginal closeness, dental pulp vitality scores were significantly lower than control group (P<0.05).ConclusionThe new mixed resin adhesive with composited resin has ideal effect on treating deciduous anterior teeth cricoid caries and deserves clinical expansion.

  17. Cervicoplastia anterior Anterior cervicoplasty

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    Lucas Gomes Patrocínio

    2004-10-01

    Full Text Available Muitos pacientes buscam correção estética da frouxidão da pele do pescoço, depósito de gordura na região submentoneana ou bandas de platisma. Em grande parte dos casos a ação medial, via cervicoplastia anterior é necessária. OBJETIVO: Demonstrar a casuística e avaliar os resultados e complicações com a técnica de cervicoplastia anterior no Serviço de Otorrinolaringologia da Universidade Federal de Uberlândia. FORMA DE ESTUDO: Relato de série. PACIENTES E MÉTODOS: Quarenta e dois pacientes, entre 39 e 65 anos de idade, sendo 40 (95,2% do sexo feminino e 2 (4,8% do masculino, foram submetidos a cervicoplastia anterior. Retrospectivamente foram avaliados resultados e complicações. RESULTADOS: Destes, 34 apresentaram resultados satisfatórios, 4 apresentaram déficit estético notado somente pelo cirurgião, 3 apresentaram déficit estético notado somente pelo paciente e 1 apresentou déficit estético necessitando cirurgia revisional. Ao estudo fotográfico, todos os pacientes apresentaram melhora do perfil cervical, redução das bandas de platisma e da frouxidão da pele, estabilização da musculatura cervical e acentuação do ângulo cervicomental, em graus variados. Houve complicação em 2 casos (discreto serohematoma e cicatriz um pouco alargada. CONCLUSÃO: A cervicoplastia, associada ou não à tração lateral pela ritidoplastia, é uma técnica que produz resultados satisfatórios na grande maioria dos casos.Many patients look for aesthetic correction of the laxity of neck skin, submandibular fat deposit or platisma bands. In a large part of the cases, medial action, through anterior cervicoplasty is necessary. AIM: To demonstrate the casuistic and to evaluate the results and complications with anterior cervicoplasty technique in the Otorhinolaryngology Service of the Federal University of Uberlândia. STUDY DESIGN: Serie report. PATIENTS AND METHODS: Forty-two patients, between 39 and 65 years of age, being 40 (95

  18. Clinical investigation of pulpotomy with Pulpdent Multi-Cal in young permanent anterior teeth%PulpdentMulti-Cal用于年轻恒前牙活髓切断术的临研究

    Institute of Scientific and Technical Information of China (English)

    白洁; 秦满; 姬爱平

    2011-01-01

    Objective:To investigate the clinical characteristics and prognosis of pulpotomy with Pulp-dent Multi-Cal (PMC) in young permanent incisors. Methods: Twenty-five young permanet incisors with vital pulps and complicated crown fractures were treated by pulpotomy with PMC at the Emergency Department of Peking University School and Hospital of Stomatology. The teeth were checked clinically and radiographically during fixed intervals. Healing of the pulp was considered to have taken place if the following criteria were met; absence of clinical symptoms, absence of apical radiolucency, continued root development in immature teeth, radiographic evidence of dentin bridge formation, and positive response to pulp vitality tests. The results were compared with the teeth which underwent pulpotomy with preparation made by our hospital. Results:Followed up for 6 -15 months (median 12 months) , on basis of the criteria for pulp healing, all teeth got successful treatment. And all the teeth showed radiographic evidence of dentin bridge formation within 1 to 3 months after pulpotomy. The operation time of PMC pulpotomy was significantly shortened (P <0.01). The root length of teeth performed with PMC pulpotomy and normal teeth had no significant difference (P >0. 05). Conclusion: PMC is an acceptable material when used in pulpotomy of young permanent teeth.%目的:研究Pulpdent Multi-Cal (PMC)盖髓剂用于活髓切断术的临床可操作性和疗效,为临床应用提供参考依据.方法:对因冠折露髓到北京大学口腔医院急诊科就诊患者的上颌年轻恒前牙25颗(20例患者)进行活髓切断术,用PMC盖髓剂作为活髓保存剂,观察临床可操作性和操作时间,术后对患牙进行定期随访观察,复诊时记录患牙的临床检查和X线片检查情况,并与采用北京大学口腔医院自制制剂进行活髓切断术的患牙进行比较.结果:随访6~15个月(中位时间12个月),25颗患牙(20例患者)均于1~3个月间

  19. 计算机辅助设计与制作氧化锆桩核在前牙修复中的应用%Clinical application of zirconia post and core made by CAD/CAM in the restoration of anterior teeth

    Institute of Scientific and Technical Information of China (English)

    刘自力; 罗文平; 贺美兰; 黄慧洁; 晏祥任; 岑荣基

    2012-01-01

    Objective To investigate the clinical application of zirconia post core made by computer-aided design and manufacturing (CAD/CAM) in the restoration of anterior teeth. Methods Seventy-five anterior teeth from 68 patients after root therapy were restored with zirconia post core crown made by CAD/CAM. At the 6 to 24 months recall appointment, clinical evaluation was applied according to the stability, beauty and periodontal index of the prosthesis. Results Three repairs were loosen, while the others were successful. During the observation, the successful ratio was 96% (72/75 ). Conclusion The recent results of the clinical application of zirconia post core made by CAD/CAM in the restoration of anterior teeth was satisfactory and the oncoming effects still depend on the further observation.%目的 评价计算机辅助设计与制作(computer-aided design and manufacturing,CAD/CAM)氧化锆桩核在前牙残根、残冠修复中的应用效果.方法 收集前牙大面积缺损患者68例共75颗患牙,CAD/CAM氧化锆桩核和全瓷冠修复,随访6 ~ 24个月,从修复体的稳定性、美观效果及牙周健康状况3个方面进行评价.结果 75颗全瓷冠修复体,2颗桩核与根部之间出现松动,牙冠与桩核之间不松动;1颗出现冠松动,桩核与根部无松动.X线片未见根尖周病变,也未出现根折、桩折.修复体与邻牙及对侧、对颌同名天然牙的电脑比色数值( Shade 值)差值为0的占41颗,差值为1~2的占34颗,差值为3及以上的为0颗.修复体外形美观,无边缘着色,牙龈形态与颜色正常.6~24个月累计成功率为96%( 72/75).结论 CAD/CAM氧化锆桩核应用于前牙修复近期效果满意.

  20. Comparison of treatment effects of modified crown lengthening surgery and orthodontic traction with crown lengthening surgery on the maxillary anterior teeth complex root fracture%改良牙冠延长术与正畸牵引加牙冠延长术对上前牙复杂根折治疗效果的比较

    Institute of Scientific and Technical Information of China (English)

    李军科; 程瑞卿

    2011-01-01

    目的 比较改良牙冠延长术与正畸牵引+牙冠延长术对上前牙复杂根折的治疗效果.方法 选取60颗牙体缺损达龈下4.Omm以上的具有保留价值的上颌前牙,随机均分为两组,每组30颗患牙,分别采用改良牙冠延长术和正畸牵引+牙冠延长术,分别记录术前、术后一周及修复后6个月的牙周探诊深度(PD)、龈沟出血指数(SBI)、牙齿松动度(TM),观察临床效果.结果 两组病例术后及修复后PD、SBI明显改善,有显著性差异(P<0.05),组间比较,无显著性差异(P>0.05).结论 两种术式对上前牙复杂根折病例均能取得较好的治疗效果.%Objective To compare the effects of modified crown lengthening surgery and orthodontic traction with crown lengthening surgery on the maxillary anterior teeth complex root fracture.Methods Sixty maxillary anterior complicated root fracture teeth with from the lowest site tooth defect to the gingival margin > 4.0mm, which can be preserved, were selected and respectively divided into two groups, and each group have 30 tooth.The modified crown lengthening surgery and onhodontics traction with crown lengthening surgery was used in the two groups respectively.The probing depth ( PD) , sulcus bleeding index ( SBI) , tooth mobility ( TM) were recorded before operation, at 7 day after operation and on six month after resloration of tooth.Results PD, SBI were decreased signiricantly at 7 day after operation and on six month after restoration in the two groups ( P < 0.05).There was no significant difference in comparison between groups ( P > 0.05).Conclusion Cood effect was obtained in using the both two methods on the maxillary anterior teeth complex root fracture.

  1. 改良牙冠延长术与正畸牵引加牙冠延长术对上前牙复杂根折治疗效果的比较%Comparison of curative effects between modified crown lengthening surgery and orthodontic traction combined with crown lengthening surgery in the treatment of maxillary anterior teeth complex root fracture

    Institute of Scientific and Technical Information of China (English)

    李新; 马科院

    2014-01-01

    目的:探讨改良牙冠延长术与正畸牵引加牙冠延长术对上前牙复杂根折的治疗效果。方法80例上前牙复杂根折患者,依据治疗措施不同进行临床分组,治疗Ⅰ组40例,采用单独牙冠延长术治疗;治疗Ⅱ组40例,采用正畸牵引联合牙冠延长术治疗。观察两组疗效。结果治疗Ⅱ组上前牙复杂根折患者美学效果评分和功能满意评分明显优于治疗Ⅰ组,差异均有统计学意义(P<0.05)。结论正畸牵引加牙冠延长术对上前牙复杂根折治疗效果明显,预后良好,值得临床推广应用。%Objective To investigate the curative effects between modified crown lengthening surgery and orthodontic traction combined with crown lengthening surgery in the treatment of maxillary anterior teeth complex root fracture. Methods A total of 80 patients with maxillary anterior teeth complex root fracture were divided into groups according to different treatment measures. The treatmentⅠgroup (n=40) received crown lengthening surgery for treatment alone, and the treatmentⅡgroup (n=40) received orthodontic traction combined with crown lengthening surgery for treatment. The curative effects of the two groups were observed. Results The aesthetic score and functional satisfaction score of the treatment Ⅱgroup were better than those of the treatment Ⅰgroup, and the difference had statistical significance (P<0.05). Conclusion Orthodontic traction combined with crown lengthening surgery can provide good curative effect and prognosis in the treatment of maxillary anterior teeth complex root fracture, and it is worthy of clinical application and promotion.

  2. Clinical therapeutic effect comparison between Sirona Cerec 3D all-ceramic crowns and porcelain fused to metal crown in anterior teeth restoration%Sirona Cerec3D全瓷冠与金属烤瓷冠修复前牙的临床对比

    Institute of Scientific and Technical Information of China (English)

    汤琼

    2012-01-01

    目的 评价Sirona Cerec 3D全瓷冠进行前牙修复的临床效果.方法 将81例(145颗前牙)患者进行随机分组,参照美国加利福尼亚牙科协会(CDA)评价标准,对使用1年的牙冠进行评价,并与同期治疗的金属烤瓷冠进行对比.结果 Sirona Cerec 3D全瓷冠修复组在边缘完整性、解剖外形、颜色和表面的成功率分别为97.5%、95%、100%、97.5%,而金属烤瓷冠对照组成功率为97.6%、92.6%、87.8%和95.1%.修复组在解剖外形和颜色方面明显优于对照组(P<0.05),且牙龈炎等副反应发生率小.结论Sirona Cerec 3D全瓷冠进行前牙修复效果良好,值得临床广泛推广.%Objective To evaluate the clinical therapeutic effect ofSirona Cerec 3D all-ceramic crowns in anterior teeth restoration.Methods 81 patients(145 anterior teeth) were divided randomly into two groups.The clinical evaluation criteria of CDA was performed 6 months to two years after wearing.And we compared the effects with porcelain fused to metal (PFM) crowns in the same period.Results On the integrity of crown margin,anatomical shape,color and surface,the succeed rate of all-ceramic crowns group were 97.5%,95%,100% and 97.5% respectively while PFM crowns group were 97.6%,92.6%,87.8% and 95.1% respectively.All-ceramic crowns group was better than PFM crowns group on the anatomical shape and color ( P < 0.05 ) and had less side effects.Conclusion Sirona Cerec 3D all-ceramic crowns has a good effect in anterior teeth restoration,worthy in expanded clinical use.

  3. Study the relationship of third molar and relapse of lower anterior teeth crowding after orthodontic treatment%下颌第三磨牙与正畸治疗后下前牙拥挤复发的相关性分析

    Institute of Scientific and Technical Information of China (English)

    夏静

    2016-01-01

    Objective To investigate the relationship of third molar and relapse of lower anterior teeth crowding after ortho-dontic treatment.Method 40 untreated subjects without skeletal malocclusion and with varying degrees of anterior teeth crowding were studied.They were divided into two groups after orthodontic treatment.Test group were extracted the third molar.Control group were held the third molar.Dental casts were measured according to Little′s irresularity index(IRID)5 years later.Results There were no significant difference between two groups through 5 years (P >0.05).Conclusion Third molar is not the main reason for relapse of anterior teeth crowding after orthodontic treatment.The prophylactic removal of third molar with no clinical symptom should be avoided.%目的:探讨下颌第三磨牙的存在与正畸结束后下前牙拥挤复发的关系。方法:选择骨性Ⅰ类下颌前牙区拥挤的患者40例,在正畸治疗结束,牙齿排齐后,随机分为两组,每组20例。试验组行下颌第三磨牙拔除术,对照组保留第三磨牙,五年后测量下前牙不整齐指数(MD -IRID)。结果:五年后观察,两组患者下前牙拥挤复发率差异无统计学意义(P >0.05)。结论:下颌第三磨牙与正畸结束后下前牙拥挤复发无直接关系,拔除没有临床症状的第三磨牙来预防下前牙拥挤复发其实不可取。

  4. MULTIPLE RETAINED TEETH IN MANDIBLE: A Case Report

    OpenAIRE

    Cvetan Cvetanov; Ivan Chenchev; A. Bakardjiev

    2010-01-01

    Purpose: The aim of this science report is to show a rare case of multiple impacted teeth at adult patient and our propose clinical approach.Materials and methods: The clinical case is showed from adult man /64-year old/ with multiple impacted teeth (6 impacted teeth in the anterior place on the mandible) were not suggestive of any syndrome or metabolic disorder. The extraction of the impacted teeth was made on two stage with piezosurgery unit under local anaesthesia. For prevention of post...

  5. A Rare Presentation of Right Lung Hypoplasia Associated with Dextrocardia and Visceral Malposition

    Directory of Open Access Journals (Sweden)

    Ayşe Yıldırım

    2012-08-01

    Full Text Available Lung hypoplasia is often associated with pulmonary venous return abnormalities, referred to as the Scimitar syndrome, in pediatric patients. A two day-old male patient presented to our clinic with respiratory distress and mild cyanosis. Diagnostic studies revealed dextrocardia, right sided hypoplasia of upper and middle lung lobes and enlargement of the left lung due to the compensation, midline liver, right sided stomach and right sided spleen. No pulmonary venous return abnormalities were detected. This is the first report of lung hypoplasia associated with heterotaxy, visceral malposition and normal pulmonary venous return.

  6. Cause of Subclavian Catheter Malposition and Technical Procedures to Take Care

    Directory of Open Access Journals (Sweden)

    Sedat Gürkök

    2012-10-01

    Full Text Available Central venous catheter application is a minor surgical procedure for patients in care unit and for patients who was planned for major operation. This procedure performs commonly on bad side with local anesthesia. In spite of minor surgical procedure, it can cause serious complications due to technical mistakes. The complications rate decrease if the professional person performed. The malposition is the most common complication. It generally associated with application mistakes. The aim of this article is to uncover the mistakes of subclavian catheter application that used commonly and the technical procedure to take care.

  7. Extracorporeal Membrane Oxygenation Cannula Malposition in the Azygos Vein in a Neonate with Right-Sided Congenital Diaphragmatic Hernia

    Directory of Open Access Journals (Sweden)

    Seung Jun Choi

    2016-05-01

    Full Text Available Malposition of the extracorporeal membrane oxygenation (ECMO venous cannula in the azygos vein is not frequently reported. We hereby present such a case, which occurred in a neonate with right-sided congenital diaphragmatic hernia. Despite ECMO application, neither adequate flow nor sufficient oxygenation was achieved. On the cross-table lateral chest radiograph, the cannula tip was identified posterior to the heart silhouette, which implied malposition of the cannula in the azygos vein. After repositioning the cannula, the target flow and oxygenation were successfully achieved. When sufficient venous flow is not achieved, as in our case, clinicians should be alerted so they can identify the cannula tip location on lateral chest radiograph and confirm whether malposition in the azygos vein is the cause of the ineffective ECMO.

  8. RTD MACRO-LOCK POST固位增强型石英纤维桩与金属桩修复上颌前牙残冠的临床疗效比较%Clinical Effect Contrast Between RTD MACRO-LOCK POST Retentive Enhanced Quartz Fiber Post and Metal Post In Restoration Of Residual Crown Of Maxillary Anterior Teeth

    Institute of Scientific and Technical Information of China (English)

    韩凉; 袁方; 应王贵

    2012-01-01

    Objective Clinical effect contrast between RTD MACRO-LOCK POST retentive enhanced quartz fiber post and metal post in restoration of residual crown of maxillary anterior teeth. Methods Select 200 cases with maxillary anterior teeth defect, randomly divide into 2 groups. Use RTD MACRO-LOCK POST retentive enhanced quartz fiber post and metal post for post core crown, observe and compare the clinical effects after 3 years. Results There is no significant difference between 2 groups after 6 months (P>0.05). The clinical success rate of fiber post group is higher than that of the metal post group after 3 years (P<0.05 ). Conclusion With correct choice of indications, the clinical effect of RTD MACRO-LOCK POST retentive enhanced quartz fiber post is better than that of the metal post.%目的 观察RTD MACRO-LOCK POST固位增强型石英纤维桩与金属桩修复上颌前牙残冠的临床疗效.方法 选取上颌前牙牙体缺损患者200例,随机分为两组,分别采用RTD MACRO-LOCK POST固位增强型石英纤维桩与金属桩进行桩核冠修复,随访观察3年.结果 纤维桩组患者修复后6个月临床成功率与金属桩组无明显区别(P>0.05),修复后3年临床成功率高于金属桩组(P<0.05).结论 在正确选择适应证前提下,RTD MACRO-LOCK POST固位增强型石英纤维桩修复效果优于金属桩.

  9. 正畸治疗中上颌第二磨牙颊侧倾斜萌出相关因素的研究%Study on related-factors of buccal malposition of upper second molars in orthodontic treatment

    Institute of Scientific and Technical Information of China (English)

    林非欧; 林新平; 倪振宇

    2011-01-01

    Objective To investigate factors related to the buccal malposition of upper second molars in orthodontic treatment.Methods Eighty - four orthodontic patients were enroUed in this study.At first visit, the upper second molars of each aubject have not erupted and erupted after the treatment but without any adjustment.Then Logistic regression was used to analyze the correlation between upper second molars buccal malposition and seven factors (including the existcnce of third molar germ, treatment with or without extracting teeth, ∠SN - MP, ∠ANB, crowding of poaterior arch before treatment, crowding of posterior arch post - treatment and mesial movement of lower first molar).Results Logistic regression revealed significant correlation between the buccal malposition of upper second molars and the crowding of posterior arch posttreatment ( P <0.001) , but other factors were excluded.The regression equation is Y = 1.238X -2.919.Conclusion There is significant correlation in the crowding of posterior arch between the patients with and without buccal malposition of the upper second molar.Buccal malposition of the upper second molar tend to occur more frequently in patients with more crowding of posterior arch, and extracting teeth could reduce the crowding.%目的 探讨正畸治疗过程中影响上颌第二恒磨牙颊侧倾斜萌出的因素,为临床工作提供参考.方法 选取84例正畸治疗患者,初诊时上颌第二磨牙均未萌出,正畸治疗结束时,上颌第二磨牙萌出建(牙合),且第二磨牙未经治疗.用Logitic回归分析正畸治疗后上颌第二磨牙颊倾的发生与第三磨牙的牙胚存在与否、是否拔牙、下颌平面角、错(牙合)类型、治疗前牙弓后段拥挤度、治疗后牙弓后段拥挤度和第一磨牙前移量之间的关系.结果 上颌第二磨牙颊侧倾斜与治疗后牙弓后段拥挤度密切相关(P<0.001),其它因素排除在外,逐步回归方程为Y=1.238X

  10. 基于计算机辅助设计的个性化舌侧矫治的前牙内收系统的临床研究%A clinical study of retraction system of maxillar anterior teeth with computer-aid designed for individual lingual orthodontics

    Institute of Scientific and Technical Information of China (English)

    张栋梁; 周春华; 白玉兴

    2012-01-01

    Objective To evaluate the effects of anterior torque controlling with individual lingual en masse retraction in the maxillary anterior teeth using computer-aided designed lever-arm and miniscrew system.Methods 20 non-growing cases with treatment protocol of extraction was selected and treated with individual lingual system,employing the lever-arm and miniscrew as en masse retraction system.Based on CBCT data,Mimics 10.0 and Claytool software was used to determine the length of the lever-arm and the position of the miniscrew so as to make sure the line of action of retraction force pass through the center of resistance of 6 maxillary anterior teeth and parallel to occlusion plane.The cephalograms were analyzed for differences in skeletal,dental and soft tissue variables between pretreatment and postretraction.Results Distances from tip of upper central incisor to PTV (PTV-U1) and upper lip to E line (LS-E) was significantly decreased (P<0.001),and no significant difference was noted for the distance from tip of upper central incisor to Palatal Plane (P>0.05).Significant retraction of maxillary anterior teeth was achieved in all patients and improved profile was obtained.Bodily movement and slightly controlled tipping occurred during the retraction and maxillary molars did not show any statistically significant movement. Conclusions The computer-aided design and location of the lingual retraction system (lever-arm and miniscrew) produced excellent and efficient retraction with great accuracy in control of anterior torque.%目的 评价计算机辅助设计的个性化舌侧前牙内收系统对前牙整体内收过程中转矩控制的效果.方法 选取20例拔除上颌第一双尖牙并且采用个性化舌侧系统进行矫治的正畸病例,采用舌侧牵引延长臂(lever-arm)和腭侧微种植钉整体内收上颌6颗前牙.基于患者的CBCT数据,采用Mimics 10.0和Claytool软件确定舌侧牵引延长臂的长度和微种植钉植入部位,使内

  11. Tooth wear, Neanderthal facial morphology and the anterior dental loading hypothesis.

    Science.gov (United States)

    Clement, Anna F; Hillson, Simon W; Aiello, Leslie C

    2012-03-01

    The Anterior Dental Loading Hypothesis states that the unique Neanderthal facial and dental anatomy was an adaptive response to the regular application of heavy forces resulting from both the masticatory and cultural use of the anterior teeth. Heavy anterior tooth wear frequently observed in Neanderthal specimens is cited as a main source of evidence for heavy forces being applied to these teeth. From this, it might be predicted that the wear shown on the anterior teeth of Neanderthals would greatly exceed that of the posterior teeth and that this differential would be greater than in other hominins with different facial morphologies. In this paper, a new method of examining tooth wear patterns is used to test these predictions in a large assemblage of Late Pleistocene hominins and a group of recent hunter-gatherers from Igloolik, Canada. The results show that all Late Pleistocene hominins, including Neanderthals, had heavily worn anterior teeth relative to their posterior teeth but, contrary to expectations, this was more pronounced in the modern humans than in the Neanderthals. The Igloolik Inuit showed heavier anterior tooth wear relative to their posterior teeth than any Late Pleistocene hominins. There was, however, a characteristic Neanderthal pattern in which wear was more evenly spread between anterior teeth than in modern humans. Overall, the evidence presented here suggests that all Late Pleistocene hominins habitually applied heavy forces between their anterior teeth and that Neanderthals were not exceptional in this regard. These results therefore does not support the Anterior Dental Loading Hypothesis.

  12. 前牙修复“动态功能性设计”概念的提出与临床实践%The concept of “dynamic functional design”for anterior teeth restoration and its clinical application

    Institute of Scientific and Technical Information of China (English)

    吴国锋

    2016-01-01

    针对前牙修复中前导功能的设计问题,该文提出前牙修复“动态功能性设计”(DFD)的新概念。先由前牙“数字化微笑设计”(DSD)技术引申出 DFD 概念的含义,提出两者在前牙修复过程中是互为补充的关系。然后通过10个临床病例具体介绍了影响 DFD 设计的4个临床因素,并根据 DFD 提出了一种前牙修复的临床对象分类法。%This article introduces a new concept,named “dynamic functional design”(DFD)for the anterior guidance control of prosthe-ses.The concept was proposed from the deficiency of “digital smile design”as a complement.Four key points have been discussed to realize DFD in clinic by 1 0 real cases,and a new classification for anterior teeth restoration is presented according to DFD in this paper.

  13. Quartz splintTM高强度石英纤维和Super-Bond C & B粘结剂固定下前牙松动牙疗效比较%Comparison of the clinical effect of Quartz splintTM high strength quartz fiber and Super-Bond C & B adhesive for anterior teeth loosening

    Institute of Scientific and Technical Information of China (English)

    赵静

    2016-01-01

    目的:比较Quartz splintTM高强度石英纤维和Super-Bond C&B粘结剂固定慢性牙周炎下前牙松动牙的临床效果。方法:选取下前牙松动需要做牙周夹板松牙固定患者40例,随机分为两组。A组:在洁治、刮治和根面平整后,使用Quartz splintTM高强度石英纤维做牙周固定;B组:在在洁治、刮治和根面平整后,使用Super-Bond C&B粘结剂做牙周固定。两组固定后即刻让患者对于固定物做出异物感评价。固定6个月后比较治疗前后的牙周探诊深度和牙周附着丧失情况。结果:两组治疗前后的牙周探诊深度和牙周附着丧失均比治疗前有明显减少,有统计学意义。组间比较,无统计学意义。固定后即刻异物感评价,B组优于A组,有统计学意义。结论:对于下前牙松动的患者,洁治、刮治和根面平整后使用Quartz splintTM高强度石英纤维和Super-Bond C&B粘结剂牙周夹板固定,均可以使牙周状况明显改善。Super-Bond C&B粘结剂牙周夹板异物感小于Quartz splintTM高强度石英纤维。%Objective To compare the clinical effect of Quartz splintTM high strength silica fiber and Super-Bond C&B adhesive in the treatment of anterior teeth loosening of the periodontal disease. Methods 40 patients with anterior teeth loosening need to be fixed in patients with loose teeth, and were randomly divided into two groups. In group A, scaling and root planing, the use of Quartz splintTM high strength quartz fiber periodontal fixed. In group B, scaling, root planing, the use of Super-Bond C&B adhesive periodontal fixation. A group and B group make foreign body sensation evaluation after fixation immediately. After 6 months of treatment, the depth of the periodontal probe and the loss of periodontal attachment were compared with that before and after the treatment. Results The depth of the periodontal probe and the loss of periodontal attachment in the A group and the B

  14. 上颌前牙及前磨牙区唇(颊)侧骨厚度及嵴顶高度相关性研究%The correlation between the labial (buccal)bone thickness and alveolar crest height in maxillary anterior teeth and premolar zone

    Institute of Scientific and Technical Information of China (English)

    张朋; 贾筱诗; 张秋霞; 卫晓霞; 许孟杰; 王蒙

    2015-01-01

    目的:测量正常�青年人上颌前牙及前磨牙区唇(颊)侧牙槽骨厚度及嵴顶高度,并研究二者之间的相关性。方法:对67名汉族青年志愿者上颌前牙及前磨牙区进行 CBCT 扫描,测量该区域牙槽嵴顶区唇(颊)侧牙槽骨厚度及唇侧牙槽嵴顶与釉牙骨质界(CEJ)间距离,采用 SPSS 17.0软件进行分析。结果:第一前磨牙颊侧嵴顶与 CEJ 之间距离最大(P <0.05);在CEJ 根方2 mm 处唇(颊)侧嵴顶高度与唇(颊)侧骨厚度呈负相关(P <0.05),0.6<|r|<0.8。结论:上颌第一前磨牙颊侧嵴顶较其他牙位高,牙槽嵴顶区唇(颊)侧骨厚度越薄,唇(颊)侧嵴顶距 CEJ 越远,种植美学风险越大。%Objective:To investigate the labial(buccal)bone thickness at alveolar crest zone and alveolar crest height of the maxil-lary anterior teeth and premolars of young adults with normal occlusion.Methods:The alveolar bone of the anterior teeth and premo-lars of 67 eligible Han national young volunteers was scanned by CBCT.Then the facial bone thickness and the distance between the facial alveolar crest and Cemento-enamel Junction(CEJ)of the anterior teeth and premolars were measured and analyzed after recon-struction.Results:The distance between labial (buccal)crest and labial (buccal)CEJ of the maxillary first premolars was the lar-gest(P <0.05);there was a negative correlation between the labial(buccal)crest height and the facial alveolar bone thickness at 2 mm from CEJ toward root derection[(P <0.05),0.6 <|r|<0.8].Conclusion:The labial (buccal)crest of the first premolars was higher than that of other teeth in maxillary aesthetic zone.At alveolar crest zone,when the labial (buccal)bone was thinner,the dis-tance between labial (buccal)crest and labial (buccal)CEJ was larger,and the implant aesthetic risk is higher.

  15. 前牙IPS热压铸造全瓷粘接桥修复的3年临床应用研究%All-ceramic resin bonded fixed partial denture made of IPS hot-pressed casting porcelain restore anterior missing teeth: a three years clinical observation

    Institute of Scientific and Technical Information of China (English)

    周团锋; 王新知; 张桂荣

    2011-01-01

    Objective :To clinic observation of IPS Empress2 and IPS e. max all ceramic resin bonded fixed partial dentures used in one anterior teeth lost in upper jaw or less than two anterior tooth lost in lower jaw. Methods : 22 patients, 26 restorations had been made, which included 16 single-retainer all ceramic resin bonded fixed partial dentures and 10 two-retainers all ceramic resin bonded fixed partial dentures. Secondary caries of the abutments, shade in the margin of the retainers and the integrity of the restorations had been observed at 3 months, 6 months, 1 year, 2 years and 3 years after all ceramic resin bonded fixed partial dentures having been bonded. Results : In the 3 years of clinic observation of the anterior all ceramic resin bonded fixed partial dentures, 1 two-retainers restoration lost bond after it had been made for 3 months, a retainer of one two-retainers restoration was broken after 6 months, but they are still used after modified as one-retainer all ceramic resin bonded fixed partial dentures, 1 two-retainers restoration lost bond two year later, It was integrity and re-bonded again that was still stable. No secondary carries and no shade in margin of the retainers had been found. Their color matches with the nature teeth excellently. The success rate was 88.5% . Conclusion: IPS Empress 2 and IPS e. max all ceramic resin bonded fixed partial dentures should be a good selection in one or two teeth lose in anterior jaws.%目的:观察单个上前牙或下颌2个以内前牙缺失采用IPS Empress 2或IPS e.max热压铸造全瓷粘接桥的临床修复效果.方法:22位患者,共制作26件前牙热压铸造全瓷粘接桥,包括16例单翼全瓷粘接桥和10例双翼全瓷粘接桥,修复后3个月、6个月、1年,2年和3年观察修复体的完整性,基牙的继发龋,边缘着色及修复体的颜色匹配.结果:1例双翼全瓷粘接桥修复后3个月脱落;1例双翼全瓷粘接桥6个月后一侧连接体折断,均改为单翼

  16. Gastric malpositioning and chronic, intermittent vomiting following prophylactic gastropexy in a 20-month-old great Dane dog

    OpenAIRE

    Sutton, Jessie S.; Steffey, Michele A.; Bonadio, Cecily M.; Marks, Stanley L

    2015-01-01

    A 20-month-old castrated male great Dane dog was presented for evaluation of chronic intermittent vomiting of 2 months’ duration. A prophylactic incisional gastropexy performed at 6 mo of age resulted in gastric malpositioning and subsequent partial gastric outflow tract obstruction.

  17. Using High-frequency Electric Knife to Open Assistant Anterior Teeth%利用高频电刀切开助萌上前牙的疗效观察

    Institute of Scientific and Technical Information of China (English)

    王景涛; 李新青; 吴大铭; 娄晓静; 李振杰

    2013-01-01

    Objective:To observe the efect of electrotome gingivoplasty in retarded eruption treatment. Methods:51 premature loss teeth of the 45 patients who need gingivectomy were carried out immediately,were randomly divided into eleltrotome group(27cases)and routine surgery group(24cases). Results:Teeth in the cases were al erupted after operation,al the periodontal and pulp of the cases were no dif erence between eleltrotome group and routine surgery group.There was a significant statistical dif erence between eletrotome group and routine surgery group (p<0.01) on the time and amount of bleeding in the opreation. Al the children of the cases were combined wel with dentists. Conclusions:The study shows that electrotome gingivoplasty is a successful and reliable method in retarded eruption treatment.%目的:探讨应用高频电刀切开助萌上前牙迟萌的临床疗效。方法45例患者51颗上前牙迟萌,24颗上前牙经过传统手术切除牙龈,对照组27颗上前牙经高频电刀切开切缘或合面龈片组织,暴露迟萌上前牙切缘或合面。结果51颗迟萌上前牙均正常萌出,牙体萌出后,牙髓、牙周情况良好。两种术式均无明显出血。电刀切除和传统手术切除牙龈两者术式时间及出血量分别为:(2.1±1.4)min和(11±3.6)min,(1.5±1.7)ml和(12±4.3)ml。传统术式的20例患儿,配合很好的2例,一般的15例,但有3例患儿配合较差。电刀切除的25例患儿,能较好配合治疗的23例,2例患儿配合一般。结论高频电刀是治疗上前牙迟萌的一种有效的技术手段之一。

  18. Low Cardiac Output Secondary to a Malpositioned Umbilical Venous Catheter: Value of Targeted Neonatal Echocardiography

    Directory of Open Access Journals (Sweden)

    Dany E. Weisz

    2014-05-01

    Full Text Available Systemic hypotension is common in very low birthweight preterm infants but the nature of the precipitating cause may be unclear. Targeted neonatal echocardiography (TnEcho is being increasingly used to support hemodynamic decisions in the neonatal intensive care unit (NICU, including identifying impairments in the transitional circulation of preterm infants, providing timely re-evaluation after institution of therapies and evaluating the placement of indwelling catheters. We present a case of a preterm infant with systemic hypotension and low cardiac output secondary to a large transatrial shunt induced by a malpositioned umbilical venous catheter. Repositioning of the line led to resolution of the hemodynamic disturbance and clinical instability, highlighting the utility of TnEcho in the NICU.

  19. 单件式锥状种植体即刻修复下前牙的临床疗效观察%Clinical observation for one-piece tapered implants immediate restoration of the lower anterior teeth

    Institute of Scientific and Technical Information of China (English)

    刘世锋; 杨小东; 滕立钊; 董鑫; 凌雄健; 周尚敏; 吴大怡; 刘果生

    2016-01-01

    目的:评价使用单件式锥状种植体在下前牙区拔牙后即刻种植并即刻修复的临床疗效。方法:将无保留价值的下前牙患牙拔除后,采用了同期植入单件式锥状种植体并即刻修复,并且修复1年以上,有随访记录的病例资料做回顾性研究。结果:53例患者共75枚单件式锥状种植体,平均观察年限3.7年,种植体存留率100%。种植修复体周围牙龈组织健康,种植体颈部无明显骨吸收。结论:单件式锥状种植体适合用于下前牙区域的即刻修复,临床疗效确切。%Objective:To evaluate clinical effects of immediate restoration after one-piece tapered implant in-stallation in lower anterior region with immediate extraction. Methods: This retrospective study includ-ed patients who have received immediate restoration after one-piece tapered implant installation in lower anterior region with immediate extraction for over 1 year. The follow-up data and clinical effects were collected and evaluated respectively. Results: The average observed period of total 75 one-piece tapered implants in 53 cases was 3.7 years. The survival rate was 100%. All implants had healthy gum tissues. In addition, no obvious periimplant bone resorption was observed. Conclusion: The clinical ef-fects of immediate restoration after one-piece tapered implant installation in lower anterior region with immediate extraction are definite.

  20. Direction of the J-Tip of the Guidewire to Decrease the Malposition Rate of an Internal Jugular Vein Catheter

    Directory of Open Access Journals (Sweden)

    Byeong jun Ahn

    2015-11-01

    Full Text Available Background We hypothesized that the direction of the J-tip of the guidewire during insertion into the internal jugular vein (IJV might determine its ultimate location. Methods In this study, 300 patients between the ages of 18 and 99 years who required central venous catheterization via IJV in the emergency department enrolled for randomization. IVJ catheterization was successful in 285 of 300 patients. An independent operator randomly prefixed the direction of the J-tip of the guidewire to one of three directions. Based on the direction of the J-tip, patients were allocated into three groups: the J-tip medial-directed group (Group A, the lateral-directed group (Group B, or the downward-directed group (Group C. Postoperative chest radiography was performed on all patients in order to visualize the location of the catheter tip. A catheter is considered malpositioned if it is not located in the superior vena cava or right atrium. Results Of the total malpositioned catheter tips (8 of 285; 2.8%, the majority (5 of 8; 62.5% entered the contralateral subclavian vein, 2 (25.0% were complicated by looping, and 1 (12.5% entered the ipsilateral subclavian vein. According to the direction of the J-tip of the guidewire, the incidence of malpositioning of the catheter tip was 4 of 92 in Group A (4.3%, 4 of 96 in Group B (4.2%, and there were no malpositions in Group C. There were no significant differences among the three groups (p = 0.114. Conclusions The direction of the J-tip of the guidewire had no statistically significant effect on incidence of malpositioned tips.

  1. Dentigerous cyst in a child associated with multiple inverted supernumerary teeth: a rare occurrence.

    Science.gov (United States)

    Agrawal, Neeraj K

    2012-01-01

    Dentigerous cysts associated with supernumerary teeth are rare with most of them developing around a mesiodens in the anterior maxilla. Dentigerous cysts from multiple supernumerary teeth, especially with inverted tooth, are rare in other regions of the maxilla. We report a unique case of a dentigerous cyst in a child associated with multiple inverted supernumerary teeth and relevant review of literarature. Dentigerous cyst arising from multiple supernumerary teeth and not anterior maxillary mesiodens is quite uncommon. In a child, such findings associated with inverted tooth are still rare. Such cysts should be managed by excision as soon as possible.

  2. 四种材料冠修复体对上颌前牙修复效果的比较%Comparative study on the effect of anterior teeth resteration by 4 kinds of ceramic crowns

    Institute of Scientific and Technical Information of China (English)

    王志凌; 陈立强; 陈鹏; 蒋志平; 高铭武; 李宁毅

    2011-01-01

    [Objective] To compare the effect of crown made by 4 different kinds material in resteration of maxillary anterior tooth. [Methods] The effect was evaluated by the following indices including color, marginal adaptation, gingival border stainjracture of the crown and status of the gingival. [ Results ] Galvanized forming ceramic crown and Cercon all-ceramic crown were better than Ni-Cr alloy ceramic crown and Co-Cr alloy ceramic crown in all aspects. [Conclusion] Galvanized forming ceramic crown and Cercon all-ceramic crown are favorable choice to restore the maxillary anterior tooth,and the Co-Cr alloy ceramic crown is better than Ni-Cr alloy ceramic crown.%[目的]比较四种材料制成的冠修复体修复上颌前牙的临床应用效果.[方法]从修复体颜色,冠边缘适合性,颈缘着色,修复体折裂和牙龈健康状况等五个方面对修复效果进行比较评价.[结果]金沉积瓷冠和泽康氧化锆全瓷冠在各个方面均优于镍铬和钴铬烤瓷冠.[结论]金沉积瓷冠和泽康氧化锆全瓷冠是上颌前牙的理想修复方式,而钴铬合金烤瓷冠优于镍铬合金烤瓷冠.

  3. Observation on clinical application value of all-ceramic crown of glass ifber post and resin core for residual crown and residual root repair of anterior teeth%玻璃纤维桩树脂核全瓷冠在前牙残冠及残根修复中的临床应用价值探讨

    Institute of Scientific and Technical Information of China (English)

    李伟; 赵国廷; 徐革英

    2014-01-01

    Objective To observe the clinical application value and effect of all-ceramic crown of glass fiber post and resin core for residual crown and residual root repair of anterior teeth. Method 106 cases with residual crown and residual root of anterior teeth treated in our hospital from April 2010 to March 2012 were selected, and the patients received repair after root canal therapy. The patients were divided into two groups according to repair modes, observation group and control group. Observation group received repair of all-ceramic crown of glass ifber post and resin core, and control group received repair of cast metal post-core and baked porcelain crown. The repair effect of two groups was compared and observed. Result After following up for two years, the success rate and satisfactory degree of observation group was evidently higher than that of control group, and the expulsion rate and odontagma rate of restoration was lower than that of control group (P<0.05), which had statical signiifcance. Conclusion Applying all-ceramic crown of glass ifber post and resin core to all-ceramic crown of glass ifber post and resin core for residual crown and residual root repair of anterior teeth not only has good retention, good color and appearance maintenance, and has little stimulation on the surrounding tissues, but also can effectively reduce detachment and fracture of restoration, which evidently improves the success rate of repair and satisfactory degree of patients, which has ideal clinical application value.%目的:探讨在前牙残冠、残根修复中使用玻璃纤维桩树脂核与全瓷冠的临床应用效果及价值。方法选取本院2010年4月至2012年3月收治的前牙残冠、残根患者106例,根管治疗后修复,并根据修复方式分为观察组与对照组,观察组患者使用玻璃纤维桩树脂核与全瓷冠修复,对照组患者使用铸造金属桩核与烤瓷冠或全瓷冠修复,对比观察两

  4. Clinical research on segmental invisible technique with mini-implant for en-masse retraction of maxillary anterior teeth%片段隐形矫治器结合微种植体内收上前牙的临床研究

    Institute of Scientific and Technical Information of China (English)

    金丽飞; 黄一慧; 弓国梁; 林新平

    2016-01-01

    Objective To evaluate the clinical efficiency of segmental invisible technique with mini-implant for en-masse retraction of maxillary anterior teeth on the aspect of vertical and torque in the treatment of bimaxillary protrusion. Methods Twelve subjects with upper dental alveolar bone protrusion were selected for this study. Arch-dimension variables were evaluated by cephalometric and dental models before and after orthodontic retraction. All data were analyzed by SPSS 20. 0 software. Results For vertical control, U1E-PP was increased by 0. 78 mm, U1AP-PP was decreased by 0. 29 mm, while the change of U1CR-PP showed no significant difference ( P>0. 05). For sagittal control, all the anterior teeth showed a decreased torque with canine displaying uprighting. Conclusion Segmen-tal invisible technique with mini-implant is efficient in the vertical and torque control of anterior teeth in the treatment of bimaxillary protrusion, and it can demonstrate invisible and aesthetic orthodontic effects.%目的:评估片段隐形矫治器结合微种植体矫治前突患者时对上前牙垂直向和转矩方面的控制效果。方法选取12例双牙槽前突患者,通过测量治疗前后X线头颅定位侧位片上颌前牙矢状向与垂直向的变化值,以及模型上的转矩变化值,使用SPSS 20.0软件进行统计分析。结果治疗后上切牙切缘至腭平面距离U1E-PP增加0.78 mm,上切牙根尖点至腭平面距离U1AP-PP减小0.29 mm,上切牙阻抗中心至腭平面距离U1CR-PP的变化无统计学差异(P>0.05),上切牙阻抗中心的位置基本不变;治疗后的上前牙转矩值减少,尖牙出现直立趋势。结论片段隐形矫治技术治疗前突患者对其上前牙的垂直向和转矩控制较好,总体获得了良好的治疗效果,并且在治疗期间充分发挥了隐形、美观的矫治效果。

  5. Root resorption of anterior teeth by using elastic flat bite plate during orthodontic treatment of deep overbite%深覆患者弹性颌平面导板矫治后下前牙牙根吸收情况观察

    Institute of Scientific and Technical Information of China (English)

    常永春; 郭杰

    2015-01-01

    Objective To observe the root resorption of the anterior teeth by using elastic flat bite plate during ortho-dontic treatment of deep overbite.Methods Sixty-one cases with deep overbite were selected and randomly divided into the observation group (21 cases for the young subgroup, 12 cases for the adult subgroup) and the control group (17 cases for the young subgroup, 11 cases for the adult subgroup) .Both groups underwent orthodontic treatment, and we used elas-tic flat bite plate in the observation and rigid flat bite plate in the control group, respectively.Periapical films were taken before and after the process of stimulating root resorption, and the root resorption of anterior teeth was measured.Results The patients in the two groups obtained satisfactory results and the effect of bite-opening was obvious.Root resorption a-mount in the observation group was (0.79 ±0.29) mm, during which the root resorption amount for the young subgroup was (0.69 ±0.29) mm and adult subgroup was (0.96 ±0.19) mm, and they were respectively(1.03 ±0.25), (0.91 ± 0.23) and (1.21 ±1.18) mm in the control group.Significant differences were found between the two groups ( all P<0.05).Conclusion The root resorption of the anterior teeth caused by elastic flat bite plate during orthodontic treatment of deep overbite is lighter than the traditional rigid plane bite plate.%目的:观察深覆患者弹性颌平面导板矫治后下前牙牙根吸收情况。方法深覆患者61例,随机分为观察组33例(青少年、成年患者各21、12例)、对照组28例(青少年、成年患者各17、11例)。两组均进行深覆矫治,其中观察组戴用弹性平面导板,对照组戴用硬性平面导板。分别于治疗前后拍摄根尖X线片,测算下前牙牙根吸收量。结果两组均取得满意疗效,打开咬合效果明显。观察组下前牙牙根吸收量为(0.79±0.29) mm,其中青少年亚组为(0.69±0.29

  6. Are teeth evidence in acid environment

    Directory of Open Access Journals (Sweden)

    Makesh Raj

    2013-01-01

    Full Text Available Aim: Teeth are the most durable structures that resist destruction more than skeletal tissue Commercially available acids can be used to destroy the body or a part, to mask human identification. The present study examines the effect of caustic acids on human dentition. Materials and Methods: Ten upper anterior teeth each were immersed in 37% hydrochloric acid (conc. HCl, 65% nitric acid (conc. HNO 3 and 96% sulfuric acid (conc. H 2 SO 4 . Teeth were retrieved, washed in distilled water, dried, photographed and radiographed at intervals of 15 min, 30 min, 1 hr, 3 hr, 5 hr and 8 hr. Results: Teeth placed in conc. HCl and conc. HNO 3 dissolved completely after 8 hours, while that placed in conc. H 2 SO 4 retained its morphology and radiographic dimension even after 8 hours. Conclusion: Hence teeth can serve as a tool in identification (age estimation and sex determination of the victim when in contact with conc. H 2 SO 4 .

  7. Ankylosed teeth as abutments for maxillary protraction: a case report.

    Science.gov (United States)

    Kokich, V G; Shapiro, P A; Oswald, R; Koskinen-Moffett, L; Clarren, S K

    1985-10-01

    It has been recognized that using the maxillary teeth to deliver extraoral force to the maxilla not only results in sutural remodeling but also periodontal remodeling and tooth movement. In patients with severe maxillomandibular malrelationships, the potential for tooth movement often limits the amount and duration of extraoral force and, consequently, affects the success of treatment. This case report describes a technique to intentionally ankylose deciduous teeth in a patient with severe maxillary retrusion. The ankylosed teeth were used as abutments to deliver an anteriorly directed intermittent extraoral force. After 12 months of treatment, the anterior crossbite was nearly corrected. At that point the ankylosed teeth loosened because of root resorption and the treatment was terminated. Cephalometric superimposition demonstrated that the occlusal correction was the result of anterior maxillary movement with little mandibular growth and no movement of the ankylosed teeth. The results suggest that intentionally ankylosed teeth may be used as abutments for extraoral traction in patients with a severe disturbance in maxillary growth.

  8. Changes of crown to root ratio of upper anterior teeth during orthodontic treatment of juvenile and adult patients:a preliminary study%青少年与成人正畸治疗前后上前牙冠根比变化的初步研究

    Institute of Scientific and Technical Information of China (English)

    钟佳永; 林新平; 汪志蔚; 郭萍

    2011-01-01

    Objective To investigate the changes of crown to root ratio of upper anterior teeth during straight wire appliance treatment, and the correlation with age. Methods 23 juvenile patients and 23 adult patients were selected. The 46 patients were divided into two groups according to age:adolescent group and adult group. External apical root resorption and alveolar crest loss of upper anterior teeth were measured on the pre-treatment and post-treatment panoramic-radiographs. The crown to root ratios of the teeth were calculated before and after treatment. Results Before the treatment, the crown to root ratios of the central incisor group, the lateral incisor group and the cuspid group of adolescent group were 0.62 ± 0.04,0.63 ± 0.04, 0.54 ± 0. 05, respectively. After the treatment, they changed into 0.70 ± 0.06, 0.70 ± 0.06, 0.60 ±0.06, respectively. Before the treatment, the crown to root ratios of central incisor group,lateral incisor group and the cuspid group of adult group were 0.67 ± 0.04, 0. 66 ± 0. 05, 0. 57 ± 0. 05, respectively. After the treatment, they changed into 0.78 ± 0.06,0.77 ± 0. 05 ,0.70 ± 0.06, respectively. Changes of crown to root ratio of upper anterior teeth occured to every patient. There was significant difference between adult group and adolescent group( P <0.01 ). Conclusions The crown to root ratio of upper anterior teeth was found significantly increased after straight wire appliance treatment, and the adult group was of higher level than adolescent group,but it was still acceptable clinically.%目的 探讨直丝弓矫治器矫治前后牙齿冠根比的变化规律,及年龄因素在其中所起的作用.方法 选取青少年患者23例和成人患者23例共46例,分为青少年组和成年组,根据正畸治疗前后全口曲面断层片,以托槽为参照系,测量计算出治疗前后中切牙、侧切牙及尖牙的根尖吸收量、牙槽嵴吸收量及冠根比变化量,进行配对t检验,分析年龄因素与矫

  9. The clinical effect of MTA in root tip reverse filling treatment for external apical root resorption of permanent anterior teeth%MTA用于根尖倒充填治疗恒前牙根尖外吸收的临床疗效观察

    Institute of Scientific and Technical Information of China (English)

    马列娜; 杨丽

    2016-01-01

    Objective:To explore the clinical effect of MTA in root tip reverse filling treatment for external apical root resorption of permanent anterior teeth.Methods:78 patients with periapical disease were selected.They were randomly divided into the experimental group and the control group with 39 cases in each.The experimental group was treated by MTA in root tip reverse filling.The control group was treated with silver mercury.We compared the treatment effect of two groups.Results:In the experimental group,the apical closure and repair of lesions were significantly better than the control group(P<0.05).The treatment effective rate of the experimental group of 97.4% was significantly higher than 89.7% of the control group(P<0.05).Conclusion:The clinical effect of MTA in root tip reverse filling treatment for external apical root resorption of permanent anterior teeth was significant.%目的:探讨矿物三氧化物凝聚体(MTA)用于根尖倒充填治疗恒前牙根尖外吸收的临床效果。方法:收治根尖周病患者78例,随机分为试验组和对照组各39例,试验组行MTA术进行根尖倒充填,对照组给予银汞合金治疗,比较两组的治疗效果。结果:试验组根尖封闭状况及病损区修复情况明显优于对照组(P<0.05)。试验组治疗有效率97.4%,明显高于对照组的89.7%(P<0.05)。结论:MTA用于根尖倒充填治疗恒前牙根尖外吸收的临床疗效显著。

  10. 渗透树脂治疗固定矫治后前牙唇面白垩斑的临床观察%Clinical observation on the effect of infiltration resin for the labial white spot lesions of anterior teeth after orthodontic treatment

    Institute of Scientific and Technical Information of China (English)

    杨红丽; 唐睿; 黄珊珊; 杨雁

    2016-01-01

    目的:观察渗透树脂治疗固定矫治后前牙唇面白垩斑的临床效果。方法:选取32例179颗患牙,参照ICDAS评估方法分为A、B、C组,观察治疗后即刻、1周及1年的治疗效果。结果:经ANOVA及Duncan多重比较,3组患牙疗效具有极显著差异(P<0.01),术前、术后1周及术后1年比较显示治疗效果不会随时间变化产生显著差异(P=0.91)。结论:渗透树脂治疗能改善患牙的美观,临床效果与患牙的病损程度有关,治疗1年后牙面颜色稳定。ICDAS方法是简单、有效、易掌握的评估方法。%Objective:To evaluate the effect of infiltration resin on the labial white spot lesions of anterior teeth after orthodontic treatment. Method:179 teeth with white spot lesions from 32 patient,and divided into A,B,C groups based on ICDAS criterion,and treated with infiltration resin. The teeth were examined immediate,one week and one year after the treatment. Result:There were significant difference among the three groups after infiltration resin treatment (ANOVA and Duncan test,P<0.01). The difference were insignificant before,one week or one year after the treatment(P=0.91). Conclu-sion:The infiltration resin treatment was effective for the white spot lesion at the early caries and could enhance the aesthetic appearance,which was stable after one-year recall. This investigation demonstrates ICDAS criterion as both a highly clinic-feasible and efficient method for caries grading.

  11. 纳米树脂用于前牙美容修复的临床疗效分析%Nano resin used for anterior teeth cosmetic repair analysis of the clinical effectio

    Institute of Scientific and Technical Information of China (English)

    夏娜

    2015-01-01

    目的::研究纳米树脂材料用于前牙美容修复的临床疗效.方法:选取2013年2月~2014年5月在我院接受前牙美容修复治疗的160例患者作为本次研究的对象.根据患者自愿选择分为观察组和对照组,每组80人,观察组患者给予纳米树脂材料治疗方法,对照组患者采取光固化复合树脂材料的治疗方法,治疗后比较两组患者疗效的差异.结果:在患者治疗1个月、3个月、6个月后,观察组患者的敏感发生率、相关并发症发生率远远低于对照组(P<0.05),而美观满意度则远远高于对照组(P<0.05).结论:纳米树脂材料应用于前牙美容修复治疗中拥有更加显著的效果,值得被广泛推广.%Objective:To observe the clinical ef ection of nano resin material used for anterior tooth cosmetic repair.Methods:Analyzed from February 2013 to May 2014 in our hospital treated with anteriG or tooth cosmetic repair of the clinical data of 160 patients,as the study object.According to the patients’voluntary choice divided into observation group and control group,each group of 80 people,the obG servation group patients give treatment of nano resin materials,the control group patients treated with light-curing composite resin material method,comparing the dif erence between the two groups of paG tients with curative ef ect after treatment.Result:In patients after 1 month,3 month,6 months later,the observation group of patients with the sensitive rate,and the incidence of complications is much lower than the control group(P<0.05),while satisfaction is significantly higher than control group(P<0.05).Conclusion:Nano resin material used for anterior tooth cosmetic repair has more significant ef ect,is worth popularizing widely.

  12. Indirect porcelain veneer technique for restoring intrinsically stained teeth.

    Science.gov (United States)

    Cutbirth, S T

    1992-01-01

    Indirect porcelain veneers are often the ideal restoration for intrinsically stained teeth. This article details a step-by-step procedure for esthetically restoring discolored teeth. Porcelain laminate veneers are often indicated when teeth bleaching or direct composite bonding procedures cannot provide the desired esthetic result. Veneers are more appealing to many patients than full coverage crowns because of the more conservative tooth preparation required. If technique details are followed meticulously and cases are appropriately selected, porcelain veneers are not only durable but also promote marvelous gingival health and may be the most esthetic anterior dental restoration.

  13. Frequency of intrusive luxation in deciduous teeth and its effects.

    Science.gov (United States)

    Carvalho, Vivian; Jacomo, Diana Ribeiro; Campos, Vera

    2010-08-01

    The aims of this study were three-fold: First, to determine the prevalence of partial and total intrusion of the primary anterior teeth. Second, to investigate the sequelae of total and partial intrusive luxation in the primary anterior teeth and in their successors and finally, to establish whether the sequelae on both deciduous and permanent teeth were related to the child's age at the time of the intrusion. Data collected from records of 169 boys and 138 girls, all between the ages of zero and 10 years, who were undergoing treatment during the period of March 1996 to December 2004. The sample was composed of 753 traumatized deciduous teeth, of which 221 presented intrusive luxation injury. Children with ages ranging from one to 4 years were the most affected with falls being the main cause of intrusion. Of all intruded teeth 128 (57.9%) were totally intruded and 93 (42.1%) partially. Pulp necrosis/premature loss and color change were the most frequent sequelae in both total and partial intrusions. Concerning permanent dentition, the most common disturbances were color change and/or enamel hypoplasia. Both types of intrusion caused eruption disturbance. Total intrusion was the most frequent type of intrusive luxation. There was no significant correlation between the child's age at the time of intrusion and the frequency of subsequent sequela on primary injured teeth (P = 0.035), between the age at the time of injury and the developmental disturbances on permanent teeth (P = 0.140).

  14. Study of Perioral Force Exerted on the Teeth in Preadolescent Children with Anterior Crossbite after Treatment%替牙期前牙反(牙合)患者治疗后口周力分布变化的研究

    Institute of Scientific and Technical Information of China (English)

    张新海; 刘国勤; 赵海军; 陈骏; 张庆福; 陈铁楼

    2012-01-01

    To provide a theoretical basis for the treatment and prevation of preadolescent children with anterior crossbite by measuring the perioral force distibution of the patients. 30 preadolescent children with anterior crossbite were selected for our study. Among them 15 children were male and 15 children were female. Their age ranged from 8 years old to 12 years old. The mean age was 10. 8 years old. Their perioral force of pre - and post - treatment in the area as followed were measured; the labial and lingual sides of man-dibular and maxillar central incisors, the first premolars and molars of both sides. About the distribution of the perioral force, there were no significient difference between pri - and post - treatment. Neglect values were not found in the lingual side of mandibular incisors. There were significient differences in perioral force values of both side of up incisor between pri - and post - treatment (P < 0. 05 ). Perioral soft tissues included muscular tissue can adapt to the changes of hard tissues and make corresponding changes to the hard tissue structures tomaintain the balance and stability of stomatognathic system.%测量替牙期前牙反(牙合)患者治疗前后口周力的分布情况,为替牙期前牙反(牙合)的预防和临床治疗提供理论依据.临床选取30名替牙期前牙反(牙合)患者,年龄8岁~12岁,平均年龄10.8岁,其中男性15名,女性15名,测量其治疗前后姿势位时上、下中切牙区唇、舌侧,左右上、下第一前磨牙区颊舌侧,左右上、下第一磨牙区颊舌侧口周力值,分析姿势位时受试者牙弓周围口周力分布变化的情况及规律.治疗前后受试者口周力各区域的分布规律基本一致;值得注意的是治疗后下切牙舌侧不再存在负压现象;治疗前后上中切牙区口周力测量值存在着显著的差异(P<0.05).口周肌肉等软组织具有适应硬组织改变的功能,随着硬组织结构的改变,口周软组织通过发生

  15. Restoring Esthetics after Anterior Tooth Loss for a Five-Year-Old Child: Natural Tooth Pontic Fiber Reinforced Prosthesis

    Directory of Open Access Journals (Sweden)

    Dhirja Goel

    2013-01-01

    Full Text Available The loss of anterior teeth can be hurtful to the patient both psychologically and socially. As the children are becoming more aware these days, they have also become conscious about their looks. Early loss of deciduous anterior teeth has a psychological effect on many children. In such young patients, paper replacement of the teeth can minimize these concerns. Many approaches have been described for this temporary replacement. This article describes the technique to use extracted natural teeth as pontics bonded to adjacent teeth with fiber reinforced resin. A fiber reinforced temporary replacement of missing teeth provides adequate strength and esthetic requirements in such cases.

  16. Clinical effect on the subgingival tooth defect of the anterior teeth crown after surgical crown lengthening%牙体缺损达龈下前牙行牙冠延长术后冠修复的临床效果

    Institute of Scientific and Technical Information of China (English)

    卢文博; 王京阳

    2015-01-01

    目的:对前牙牙体缺损达龈下的患者行冠延长术,探讨冠延长适应证、手术方法及术后修复方法和效果。方法收集2009年6月~2013年3月于中国中医科学院广安门医院就诊的前牙牙体缺损达龈下患者36例(41颗患牙),行牙冠延长术,牙体缺损位于龈下<2 mm,采用龈切除术;牙体缺损位于龈下2~4 mm,采用翻瓣去骨及骨成形术,术后6~8周行全冠修复。比较修复效果及修复前后龈沟出血指数(SBI)、菌斑指数(PLI),松动度(TM)、延长出的冠高度、黑三角发生率。结果①41颗患牙的牙体缺损断面术后均暴露,无松动;1年后仅1例出现冠脱落,其余良好。②术后6、12周SBI(0.98,0.76)、PLI(0.70,0.44)低于术前(2.35,1.52),TM(0.65,0.52)高于术前(0.37),差异有统计学意义(P<0.05)。③术后6周[(3.02±0.51)mm]、12周[(3.24±0.59)mm]延长出的冠高度均高于术后2周[(2.35±0.46)mm],差异有统计学意义(P<0.05)。④修复即刻(78.05%)、修复后6个月(21.95%)、修复后12个月(19.51%)黑三角发生率差异有统计学意义(P<0.05)。⑤修复后12个月SBI(1.14)、PLI(0.71)高于修复即刻(0.76,0.44),差异有统计学意义(P<0.05)。结论通过严格控制冠延长术适应证和术后修复方法,以及正确牙周护理,前牙牙体缺损达龈下可获得满意的临床修复效果。%Objective To carry out surgical crown lengthening for patients with subgingival tooth defect of the anterior teeth crown, discuss the selection of indications, surgical techniques, postoperative repair methods and effects. Meth-ods 36 patients with a total of 41 teeth structure defect were selected from June 2009 to March 2013 in Guang' anmen Hospital, China Academy of Traditional Chinese Medicine. All of them were treated with anterior subgingival surgical crown lengthening. Patients whose subgingival tooth defect located< 2 mm, treated with gingival resection; patients whose

  17. Neonatal and maternal outcomes of successful manual rotation to correct malposition of the fetal head; A retrospective and prospective observational study

    National Research Council Canada - National Science Library

    Nicola Tempest; Naomi McGuinness; Steven Lane; Dharani K Hapangama

    2017-01-01

    .... Methods Outcomes of all births successfully assisted by manual rotation followed by direct traction instruments were compared with other methods of operative birth for fetal malposition in the second stage of labour...

  18. A comparative study of the clinical effects on the treatment of the subgingival defects of the upper anterior teeth by modified crown lengthening surgery and by crown lengthening surgery with orthodontic traction%改良牙冠延长术与正畸牵引加牙冠延长术治疗上前牙龈下牙体缺损的疗效比较

    Institute of Scientific and Technical Information of China (English)

    雷琼; 陈燕

    2012-01-01

    Objective The purpose of the study is to compare the clinical effects on the treatment of the subgingival defect of the upper anterior teeth by modified crown lengthening surgery and by crown lengthening surgery with Orthodontic traction. Methods 54 upper anterior teeth from 46 patients were divided into two groups randomly, including 27 teeth in the observation group treated by crown lengthening surgery with orthodontic traction and 27 in the control group treated by modified crown lengthening surgery. The difference of indexes before and after treatment in the two groups. Results The indexes such as PPD, GI and TM were improved statistically after treatment ( P 0.05 ) . Conclusion Both the modified crown lengthening surgery and the crown lengthening surgery with orthodontic traction can be applied to treat the subgingival defect of the upper anterior teeth.[ Key words ] modified crown lengthening surgery; crown lengthening surgery with orthodontic traction; subgingival defects%目的 比较改良牙冠延长术与正畸牵引加牙冠延长术对上前牙龈下牙体缺损的治疗效果.方法 选择上前牙龈下牙体缺损患者46例(54颗牙),随机均分为两组.对照组采用改良牙冠延长术治疗,观察组采用正畸牵引加牙冠延长术治疗.比较治疗前后两组患者治疗后各指标的差异.结果 与治疗前比较,两组患者PPD、GI、TM等指标均有不同程度的改善,差异有统计学意义(P<0.05).两组患者之间比较,差异无统计学意义(P>0.05).结论 改良牙冠延长术与正畸牵引加牙冠延长术对上前牙龈下牙体缺损均有较好的治疗效果,临床工作中可根据患者情况选择使用.

  19. COMPARISON OF BOND STRENGTH OF THREE DENTURE TEETH MADE IN IRAN WITH RESIN BASES AND IVOCLAR DENTURE TEETH

    Directory of Open Access Journals (Sweden)

    R MOSHARRAF

    2002-09-01

    Full Text Available Introduction. One of the most common repairs in removable prostheses is, substitution debonded teeth in their places. In the other hand, with the incrased use of implants & the commensurate increase in force applied to prosthetic components, it is probable that tooth debonding will become an even greater clinical problem. Therefore in this study we are trying to select the strongest bond strength of Iranian denture teeth with respect to lvoclar denture teeth (Approved and recommended by ADA. Methods. In this study the upper anterior set of three Iranian denture teeth (called Berelian, Marjan and Supernevoclar and lvoclar denture teeth were used. of each type of denture teeth, 21 specimens was selected and the denture teeth glaze was removed in each specimen. Then the laboratory procedures (removal of wax & resin packing according to British Standard 3990 (BS 3990 or ISO 3336 was done. Each specimen was tested by an Instron machine. The tensile test used with the cross-head speed of 5mm/min until fracture occured. Results. The mean bond strength in Berelian teeth uppermost, afterward Marjan, Ivoclar and Super nevoclared in second, third and fourh rank respectively. But statistical analysis showed no significanrt difference among the mean bond strength in four groups of denture teeth. The percentage of cohesive fracture (sum of acrylic farcture and dental fracture in Berelian specimens was uppermost, afterward Supernevoclar and Marjan were placed in second, third & fourth rank respectively. But statistical analysis showed no significant difference among the percentage of cohesive fracture in different groups of denture teeth. Discussion. The bond strength and the percentage of cohesive fracture of Iranian denture teeth is the same & competitive to lvoclar denture teeth (approved and recommended by ADA.

  20. 成年人正畸治疗中上前牙牙根吸收的CBCT研究%Study of CBCT for Root Resorption of the Anterior Teeth of Maxillary During Adult Orthodontic Treatment

    Institute of Scientific and Technical Information of China (English)

    乔义强; 朱凤节; 崔淑霞

    2014-01-01

    To evaluate the correlations between root resorption during orthodontic treatment using cone-beam computed tomography(CBCT).Method:10 patients who treated for orthodontic tooth were selected, and measured the root resorption around six teeth(bilateral maxillary central incisors,lateral incisors,and canines) by using CBCT,before orthodontic treatment and after 12 months treatment,the correlation was calculated between root resorption.Result:The length of all measuring tooth root were compared before and after treatment,and the differences were statistically significant(P<0.05). The root resorption was largest in the maxillary lateral incisors, the left and right lateral incisors were 1.13 mm and 1.14 mm respectively;followed by the maxillary central incisors, the left and right central incisors were 0.97 mm and 0.96 mm;and then was the maxillary canines,the left and right canines were 0.87 mm and 0.95 mm.Conclusion:(1)The patients have an obvious root absorption in the treatment of orthodontic tooth orthodontic.(2)This study has demonstrated that CBCT is a useful approach for evaluating apical root resorption after orthodontic treatment.%目的:本研究使用三维影像CBCT进行评价旨在提高正畸治疗中牙根吸收的精确性。方法:选取进行正畸拔牙治疗的患者10例,并在治疗前和治疗12个月分别拍摄CBCT,测量治疗前后上颌6个牙齿的长度(双侧中切牙、侧切牙和尖牙),计算得出牙根吸收的数值。结果:所有测量牙齿治疗前后牙根长度比较均有统计学意义(P<0.05)。牙吸收量最大为上颌侧切,左右侧分别为:1.13 mm和1.14 mm;其次为上颌双侧中切牙,左右侧分别为:0.97 mm和0.96 mm;上颌双侧尖牙吸收最少,左右侧分别为0.87 mm和0.95 mm。结论:(1)结果显示正畸拔牙矫正患者治疗中有一个明显的牙根吸收。(2)本研究证实使用CBCT评价牙根吸收是一个有效而且精确的方法。

  1. Clinical study of traction preservation of maxillary anterior teeth residual root with microscrew anchorage%种植钉牵引保存上颌前牙残根的临床研究

    Institute of Scientific and Technical Information of China (English)

    温兴涛; 任柏林; 包丽娜; 李东健

    2015-01-01

    目的:通过种植钉辅助正畸加力牵引上前牙龈下残根,评价其使用效果。方法选择上前牙冠折病例18例,前牙10例,前磨牙8例。在需要牵引的牙齿附近植入2颗彼此平行的微种植钉,用树脂粘接托槽,将片段弓固定在托槽上,牵引龈下残根。结果所有患牙断端均达到龈缘上1mm以上,向移动距离为2.8~4.3mm。15例合格,3例修复体松动达Ⅱ度,判定为不合格。结论利用正畸方法牵引龈下牙根,再行桩冠修复,可有效地解决前牙美观的问题,这种方法不需要以邻牙或对牙作为支抗,能有效避免支抗牙移位或支抗丧失的不良反应。%Objective   To evaluate the effect of orthodontic extrusion with microscrew anchorage in the repair of reexposed subgingival residual root. Methods   A total of 18 cases of anterior teeth with crown fracture, 10 cases of anterior teeth, and 8 cases of premolar were chosen. Two parallel microimplants were implanted near the traction dental implant, with resin-bonded brackets. Segmental arch is fixed on the bracket and traction of subgingival residual root. Results   The broken end of all teeth reached a gingival margin of 1 mm. The distance of the occlusion to the mobile was 2.8 mm to 4.3 mm. Among 18 patients, 15 cases were qualified, and 3 cases of prosthesis were unqualified. Conclusion  Orthodontic traction with microscrew anchorage has good effect on the repair of under-the-gum residual root. The greatest advantage of this method is that it does not need to use adjacent teeth or antagonistic teeth as anchorage, thus effectively avoiding the

  2. Four year's clinical evaluation of glass fiber reinforced resin-bonded fixed partial denture as a periodontal splint to replace lost anterior teeth%玻璃纤维增强复合树脂牙周夹板粘接修复前牙缺失的四年临床观察

    Institute of Scientific and Technical Information of China (English)

    肖遵胜; 姜婷; 方晓倩; 吕品; 李健; 贾璐

    2016-01-01

    目的 评价玻璃纤维增强复合树脂粘接义齿修复前牙缺失的临床存活率并分析其影响因素.方法 选择1~3颗前牙缺失、缺牙区邻牙牙周支持丧失严重、不符合种植义齿及全冠固位固定义齿修复条件的30例患者,制作玻璃纤维(Everstick C&B)增强复合树脂粘接义齿30个.采用树脂粘接系统(Superbond C&B)进行粘接固定修复.在修复即刻、修复后1、2、3、4年分别对义齿的完全存活率、功能存活率、基牙牙槽骨高度进行记录和评估,分析失败原因.采用完全随机的单因素方差分析及卡方检验分析基牙骨高度变化.结果 修复1~3年后,每年分别出现义齿连接体折裂1例,经过树脂修补后继续使用.第3、4年各有1例连接体再次折裂后义齿整体脱落.4年随诊后,30例玻璃纤维增强复合树脂粘接义齿的完全存活率为83% (25/30),功能存活率为93% (28/30).22% (13/60)的邻牙骨高度降低,而另外78% (47/60)的邻牙骨高度增加,与修复后第1年相比差异有统计学意义(P<0.05),邻牙牙周状况得到改善.结论 4年临床观察显示,对于1~3颗前牙缺失合并邻近基牙牙周支持受损的患者,玻璃纤维增强复合树脂粘接义齿是一种可行的固定修复方式.%Objective To evaluate the clinical performance of glass fiber reinforced resin-bonded fixed partial denture(GFR-RBFPD) as a periodontal splint on abutment teeth with reduced periodontal support.Methods Thirty fixed-fixed GFR-RBFPD were delivered to restore anterior partial edentulous dentitions.The adjacent abutment teeth had severely reduced periodontal support and were not indicated for full crown retained FPD.The success rate and functional survival rate had been recorded and the periodontal condition had been evaluated for 4 years.The results were statistically analyzed with single factor variance analysis and chi square test(α=0.05).Results In the first,second,and third year following

  3. Clinical use of CBCT and light cure adhesive system in treatment of maxillary anterior impacted teeth%锥形束 CT和光固化粘接技术在上颌埋伏前牙矫治中的应用

    Institute of Scientific and Technical Information of China (English)

    陈慧霞; 沈云娟; 秦燕军; 曹寅

    2014-01-01

    Objective To analyze the clinical use of CBCT and light cure adhesive system in treatment of anterior maxil -lary impacted teeth in orthodontics .Methods Patients with impacted teeth were divided into two groups according to methods of examination .Brackets of traditional X-ray group were bonded and rebonded with Tianjin-Beijing enamel adhesive system while brackets of CBCT group with Transbond TM PLUS MIP and Transbond TM PLUS light cure adhesive system .Treatment dura-tion and rates of bond failure of the two groups were collected and analyzed .Results For the traditional X-ray group,the fail-ure rate was higher(P<0.05)and the treatment duration was longer (P<0.05) than that of the CBCT group.Conclusion The clinical use of CBCT and light cure adhesive system is of great value in the orthodontic treatment of anterior maxillary im -pacted teeth .%目的:评价锥形束CT( CBCT)和光固化粘接技术在上颌埋伏前牙正畸矫治中的应用效果。方法选择2006年3月-2012年10月在我院正畸科诊治的上前牙埋伏阻生患者28例,根据患者埋伏阻生牙检查定位方法分为传统X线片组和CBCT组,传统X线片组采用37%磷酸酸蚀剂和津京牙釉质粘接剂严格按照使用说明进行埋伏牙托槽的直接粘接和脱落后再粘接;CBCT 组采用3M公司生产的TransbondTM PLUS MIP耐湿性处理液和TransbondTM PLUS光固化粘接剂严格按照使用说明进行托槽的直接粘接和脱落后再粘接。分别记录2组患者埋伏牙牵引至正常位置所需时间及牵引过程中埋伏牙托槽的脱落情况,比较其差异。结果 CBCT组埋伏牙托槽脱落次数及矫治时间均少于传统X线片组( P<0.05)。结论 CBCT和光固化粘接技术的结合在上颌前部埋伏阻生牙的正畸矫治过程中发挥了积极有效的作用。

  4. 纳米复合树脂和光固化复合树脂材料用于前牙美容修复的效果比较%Effect of Nano-Composite Resin Material and Light-Cured Composite Resin Material on Cosmetic Restoration of Anterior Teeth

    Institute of Scientific and Technical Information of China (English)

    王玫

    2014-01-01

    目的:比较纳米复合树脂材料和光固化复合树脂材料用于前牙美容修复的效果。方法选择接受前牙美容修复的患者100例作为研究对象,分别使用光固化复合树脂材料及纳米复合树脂材料,比较治疗后牙齿敏感发生率及自觉疼痛评分差异。结果观察组治疗后1 d、1周、1个月牙齿敏感发生率分别为8.00%,6.00%,4.00%,均明显低于对照组( P﹤0.05);平均疼痛评分为(2.63±0.72)分,并发症发生率为22.22%,均明显低于对照组( P﹤0.05);优良率为88.00%,满意度为92.00%,均明显高于对照组( P﹤0.05)。结论纳米复合树脂材料用于患者前牙美容修复可有效降低近期牙齿敏感发生率,减轻自觉疼痛感受,优于光固化复合树脂材料。%Objective To compare the effect of the nano-composite resin material and the light-cured composite resin material on cosmetic restoration of anterior teeth. Methods The 100 patients receiving cosmetic restoration of anterior teeth were selected as the research subjects and used the light-cured composite resin materials and the nano-composite resin materials respectively. The occur-rence rates of the tooth sensitivity and the perceived pain scores after therapy were compared between the two kinds of materi-als. Results The occurrence rates of the teeth sensitive on 1 d' 1 week' 1 month after treatment in the observation group were 8. 00%' 6. 00% and 4. 00% respectively' which were significantly lower than those in the control group ( P﹤0. 05 ) . The average pain scores in the observation group were ( 2. 63 ± 0. 72 ) and the occurrence rate of complications was 22. 22%' which were significantly lower than those in the control group ( P﹤0. 05 ) . The excellent rate in the observation group was 88. 00% and the satisfaction was 92. 00%' which were significantly higher than those in the control group( P﹤0. 05). Conclusion Nano-composite resin can effectively

  5. Malocclusion of teeth

    Science.gov (United States)

    ... clean and decrease risk of tooth decay and periodontal diseases ( gingivitis or periodontitis ). Eliminate strain on the teeth, ... JA, ed. McDonald and Avery's Dentistry for the Child and Adolescent . 10th ed. St. Louis, MO: Elsevier; 2016:chap ...

  6. 种植体支持牙龈诱导在上颌前牙种植美学修复的应用效果分析%Implant-supported Application Results in Induced Gingival Maxillary Ante-rior Teeth Aesthetic Restoration Planting Analysis

    Institute of Scientific and Technical Information of China (English)

    姜美鹏

    2016-01-01

    目的:探析种植体支持牙龈诱导在上颌前牙种植美学修复的应用效果。方法整群选取并回顾性分析2014年2月—2016年2月该院收治的85例上颌前牙种植患者的临床资料,按修复方案不同分为对照组(35例)和研究组(50例),对照组行即刻佩戴临时冠塑形牙龈修复,研究组行种植体支持牙龈诱导成形修复,对比两组软组织红色美学评分(PES)﹑骨吸收评价(DBI)及龈乳头指数。结果研究组临时冠塑形后骨吸收评价(0.21±0.14)﹑红色美学评分(7.32±1.62)及永久修复后骨吸收评价(0.28±0.23)﹑红色美学评分(7.79±1.23)均显著优于对照组,差异有统计学意义(P<0.05)。结论种植体支持牙龈诱导成形在上颌前牙区种植美学修复的应用效果显著。%Objective Of implant-supported application results in induced gingival maxillary anterior teeth Aesthetic restoration planting. Methods Group selection A retrospective analysis in February 2015 - the clinical data of February 2016 our hospital 85 cases of patients with maxillary anterior teeth grow, according to the repair program divided into con-trol group (35 cases) and study group (50 cases), control group were immediate temporary crown to wear gum shaping repair, implant-supported research group underwent induction therapy to repair the gums, compared two groups of red and soft tis-sue aesthetics score (PES), the evaluation of bone resorption (DBI) and papilla index. Results After the temporary crown shaping Study Group evaluation of bone resorption (0.21 ± 0.14), red aesthetic score (7.32 ± 1.62), and after evaluation of the permanent repair of bone resorption (0.28 ± 0.23), red aesthetic score (7.79 ± 1.23) were significantly better than the control group differences were statistically significant (P<0.05).Conclusion Implant-supported application results in induced gingival maxillary anterior dental implants aesthetic restorations significantly.

  7. Bonding of acrylic denture teeth to resin denture bases.

    Science.gov (United States)

    Geerts, G A V M; Stuhlinger, M E

    2012-07-01

    Anterior teeth debonding from dentures is a common problem. This study tested the bond strength of denture teeth to two types of denture resin, with and without grooving the ridge-lap surface. Bond strength and fracture type of three different groups were compared: 1. Teeth bonded to heat-cured polymethyl methacrylate (PMMA); 2. Teeth bonded to pour-type PMMA; 3. Grooved teeth bonded to pour-type PMMA. Specimens were manufactured following ISO standard 22112. Force values at failure were analysed using one-way analysis of variance, using the mixed procedure with confidence interval of 95%. Types of failure were identified as adhesive, cohesive or combination. In descending order, mean failure forces were 418.55N (Group One), 367.55N (Group Two) and 290.05N (Group Three). There was no significant difference between the means of groups 1 and 2 (p = 0.0627). Group Three differed from both other groups (p denture teeth (83% and 72% respectively); group Three showed predominantly cohesive fractures within the denture PMMA (75%). Without ridge-lap modification, the bond strengths of denture teeth to pour-type and heat-cured denture resin were similar. Failures were predominantly of cohesive nature within the teeth themselves. Grooving the ridge-lap reduced fracture resistance and led to breakages predominantly in denture PMMA.

  8. Changes in alveolar bone thickness due to retraction of lower anterior teeth%内收下切牙对下切牙区牙槽骨改建的影响

    Institute of Scientific and Technical Information of China (English)

    李佳岭; 李小兵; 李佳园

    2011-01-01

    目的 对拔除第一前磨牙内收下切牙后,下切牙区牙槽骨的改建情况进行头影测量分析。方法选择47例治疗前轻度拥挤、拔除4颗第一前磨牙以内收下切牙的患者,在其治疗前后行X线头颅侧位片检查,采用盲法对软硬组织和下切牙区牙槽唇舌侧厚度的进行测量,并采用SPSS 13.0软件对治疗前后的测量数据进行配对t检验。结果头影测量分析显示:拔除4颗第一前磨牙内收切牙后,下切牙区牙槽整体厚度减小。唇舌向:舌侧牙槽厚度减少较多,唇侧牙槽厚度减小较少。垂直向:靠近牙冠的牙槽厚度减少较少,根部减小较多。结论内收下切牙后,牙槽骨的生物学改建以吸收为主,增生很少,因此下前牙牙槽厚度减少明显。治疗前下齿槽座点和根尖处唇舌侧骨皮质改建能力较弱,可以近似作为下切牙移动的“限制点”所在,帮助临床医生确定下切牙移动的范围。%Objective To investigate the changes of alveolar bone thickness after retraction of lower incisor. Methods 47 patients of slight crowding and four first premolars extracted for orthodontics purpose, were collected as study samples. Their pre- and post treatment cephalometric films were analyzed by blind method for hard and soft tissue changes and remodeling of anterior alveolar after treatment. Paired t test was used to evaluate the hard and soft tissue changes with SPSS 13.0 software package. Results The cephalometric values demonstrated that: Lower incisor alveolar thickness showed a significant decrease after incisor retraction. From sagittal view, the lingual cortical plate thickness reduced more than the labial one; from vertical view, alveolar bone thickness at the apical level decreased more than that at the coronal level. Conclusion The absorption of alveolar bone exceed the apposition during lower incisor retraction, so that the alveolar thickness decreased significantly

  9. Evaluation of malposition of the branch pulmonary arteries using cardiovascular computed tomography angiography

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Hui [Guangdong Academy of Medical Sciences, Department of Radiology, Guangdong General Hospital, GuangZhou, GuangDong (China); Brigham and Women' s Hospital, Harvard Medical School, Cardiovascular Imaging Program, Department of Medicine (Division of Cardiovascular Medicine) and Radiology, Boston, MA (United States); Juan, Yu-Hsiang [Brigham and Women' s Hospital, Harvard Medical School, Cardiovascular Imaging Program, Department of Medicine (Division of Cardiovascular Medicine) and Radiology, Boston, MA (United States); Chang Gung Memorial Hospital, Linkou and Chang Gung University, Department of Medical Imaging and Intervention, Taoyuan (China); Wang, Qiushi; Huang, Hongfei; Yang, Lin [Guangdong Academy of Medical Sciences, Department of Radiology, Guangdong General Hospital, GuangZhou, GuangDong (China); Xie, Zhaofeng [Guangdong Academy of Medical Sciences, Department of Pediatric Cardiology, Guangdong General Hospital, GuangZhou, GuangDong (China); Chen, Jimei; Zhang, Xiaoshen [Guangdong Academy of Medical Sciences, Department of Cardiovascular Surgery, Guangdong General Hospital, GuangZhou, GuangDong (China); Liang, Changhong [Guangdong Academy of Medical Sciences, Department of Radiology, Guangdong General Hospital, GuangZhou, GuangDong (China); Guangdong Academy of Medical Sciences, Department of Radiology, Guangdong General Hospital, Guangzhou (China); Chung, Taylor [Children' s Hospital and Research Center Oakland, Department of Diagnostic Imaging, Oakland, CA (United States); Kwong, Raymond Y.; Saboo, Sachin S. [Brigham and Women' s Hospital, Harvard Medical School, Cardiovascular Imaging Program, Department of Medicine (Division of Cardiovascular Medicine) and Radiology, Boston, MA (United States)

    2014-12-15

    To analyze 15 cases of malposition of branch pulmonary arteries (MBPA) for the hospital-based prevalence, clinical information, surgical outcome, imaging findings, associated cardiovascular and airway abnormalities on cardiovascular computed tomography angiography (CCTA). We retrospectively searched for patients with MBPA from our database consisting of patients referred for CCTA due to known or suspected congenital heart disease and also from all patients receiving chest computed tomography (CT) during the same time period. We analyzed the hospital-based prevalence, image findings, associated cardiovascular anomalies, airway compression, and recorded the clinical information and surgical outcome. Our study showed 15 patients with MBPA (hospital-based prevalence: 0.33 % among patients with congenital heart disease and 0.06 % in all patients receiving chest CT or CCTA). Classic type was more common than lesser type (67 % versus 33 %). All patients had associated cardiovascular anomalies, including aortic arch abnormalities (80 %) and secondary airway compression (33 %). Surgery was performed in 67 % of cardiovascular anomalies and 60 % of airway stenoses. MBPA has a hospital-based prevalence of 0.33 % among patients with congenital heart disease and 0.06 % in all patients receiving either chest CT or CCTA. CCTA can delineate the anatomy of MBPA, associated cardiovascular and airway abnormalities for preoperative evaluation. (orig.)

  10. Aspiration of two permanent teeth during maxillofacial injuries.

    Science.gov (United States)

    Xiao, Wen-lin; Zhang, Dai-zun; Wang, Yan-hui

    2009-03-01

    Aspiration of a tooth in maxillofacial injuries is a known complication necessitating prompt recognition and early treatment to minimize potentially serious and, sometimes, even fatal consequences. Here, we report a rare and unusual case in its presentation, the patient having aspirated 2 permanent teeth after maxillofacial, cervical vertebrae, and thoracic region crush injuries due to a motor vehicle accident. The diagnosis of teeth aspiration was delayed until 2 weeks after the event. An aspirated anterior tooth was expectorated by the patient himself, and the other aspirated anterior tooth was removed by flexible bronchoscopy. The paper also emphasizes that clinicians must be aware of dental injury resulting from maxillofacial injuries and account for all teeth as part of their evaluation, keeping an open mind as to where a missing tooth might be located. A rapid diagnosis depends on high clinical suspicion, clinical signs, and radiologic findings.

  11. 根尖囊肿前牙行即刻种植联合引导骨再生术对骨形成的影响%The effect of immediate implant combined guided bone regeneration technique on the bone formation of anterior teeth with apical cyst

    Institute of Scientific and Technical Information of China (English)

    赵殿才; 何琨瑜; 欧阳舢

    2016-01-01

    Objective To evaluate the bone formation of immediate implant in combination with guided bone regeneration (GBR) technique in restoration of anterior teeth with apical cyst. Methods Twenty⁃nine residual roots in 20 patients who asked for implant treatment and had no surgical contraindications were included. The residual roots were extracted and cystectomy was performed, followed by immediate implant and GBR. The second stage surgery was performed 6 months later and restorations were cemented in 8 months postoperatively. One year follow⁃up was performed to observe the stability of the implants and crowns. X⁃ray was also taken to evaluate the bone loss around the implant. Results Only one implant was loose,the rest implants were demonstrated to have good clinical results without loosen,dislocation or collagen membrane exposure. The gingival margins around the implants were free from suppuration and porrhea. High patient satisfaction and good masticatory function were reported during the follow⁃up. X⁃ray showed bone resorption was less than 1.2 mm for one year and good calcification of implanted bone powders. The clinical successful rate was 96.6% in this study. Conclusion For the cases of anterior teeth apical cyst,apical cyst cystoectomy in combination with immediate implant surgery and GBR technique can be used as a reliable and effective method to reduce the absorption of alveolar bone and facilitate new bone formation.%目的:评价前牙区根尖囊肿摘除后行即刻种植联合同期引导骨再生术(GBR)的骨形成情况。方法本研究入选共20例患者29颗无保留价值的残根,所有患者就诊时均要求种植修复,排除手术禁忌后拔出残根,行囊肿摘除术+即刻种植+GBR。术后6个月行二期手术,8个月冠修复,永久修复后随访1年,观察种植体及义齿的稳定性和牙片变化,对临床效果进行评价。结果除1枚种植体松动明显,其余种植体植骨区新骨形成

  12. 上颌前牙翻瓣与不翻瓣即刻牙种植术对患者口腔内软硬组织的影响对比%Maxillary anterior teeth turned contrast flap and the effect of flapless immediate implant on patients with oral soft tissue

    Institute of Scientific and Technical Information of China (English)

    林华荣; 钱三楼; 温兴涛

    2015-01-01

    Objective: To explore the application of flap and flapless on maxillary anterior teeth of immediate implant soft tissue contrast effect, oral cavity. Method: Selected January 2012 to January 2014 of 254 cases of surgery patients in our hospital for immediate dental implant, and according to the patients to choose different implantation divided into observation group and control group. The observation group was given with no flap for immediate implant, the control group was used flap immediate implant, compared the two groups of patients after operation and the satisfaction indexes. Results: The patients in the observation group after treatment satisfaction reached 88.93%(217/244), was significantly higher than the control group of 79.10%(193/244). Moreover, the observation group's planting survival rate was high, operation time was short, the better was the symptoms and postoperative. Conclusion: No flap of anterior maxillary teeth immediate implant does not need to flap suture, reduce the risk of postoperative infection, can better meet the needs of patients. This relieves the pain to a great extent, is worthy of recommendation.%目的:探究应用翻瓣与不翻瓣对上颌前牙即刻牙种植术效果,对比口腔内软硬组织状况。方法:选择2012年1月至2014年1月在我院行即刻牙种植术病患254例,并根据病患选择不同种植术分为观察组和对照组。其中观察组采用不翻瓣进行即刻牙种植术,对照组采用翻瓣即刻牙种植术。对比两组病患术后各项指标和满意度。结果:观察组病患治疗后满意度达到88.93(217/244),明显高于对照组79.10(193/244)。并且,观察组种植成活率高、手术时间短,且术后各症状表现更好。结论:不翻瓣对上颌前牙行即刻牙种植术不需要翻瓣缝合,降低术后感染的几率,能更好满足病患需求。这在极大程度上减轻了病患的疼痛,值得临床推荐。

  13. Supernumerary teeth in clinical practice

    Directory of Open Access Journals (Sweden)

    Anna K. Szkaradkiewicz

    2011-07-01

    Full Text Available Introduction: Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth. The prevalence rates of supernumerary teeth in the permanent dentition amounts 0.1-6.9%, and in deciduous dentition 0.4-0.8%. The presence of supernumerary teeth can be found in everyday dental practice.Case presentation: We describe 3 cases of patients with supernumerary teeth. First patient had supernumerary lateral incisor 12s, second - premolar fused, multicuspid, supernumerary deciduous tooth 64s of having several interconnected roots, and third - erupted odontoma between teeth 13 and 14. In all cases treatment involved the removal of the supernumerary tooth.Conclusions: The decision on proceeding with the supernumerary teeth should be based on the full clinical picture and interview. Early diagnosis and removal of supernumerary teeth allow to avoid or reduce possible complications.

  14. Estimating Gear Teeth Stiffness

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard

    2013-01-01

    The estimation of gear stiffness is important for determining the load distribution between the gear teeth when two sets of teeth are in contact. Two factors have a major influence on the stiffness; firstly the boundary condition through the gear rim size included in the stiffness calculation...... and secondly the size of the contact. In the FE calculation the true gear tooth root profile is applied. The meshing stiffness’s of gears are highly non-linear, it is however found that the stiffness of an individual tooth can be expressed in a linear form assuming that the contact length is constant....

  15. Evaluation of malposition of the branch pulmonary arteries using cardiovascular computed tomography angiography.

    Science.gov (United States)

    Liu, Hui; Juan, Yu-Hsiang; Wang, Qiushi; Xie, Zhaofeng; Chen, Jimei; Huang, Hongfei; Zhang, Xiaoshen; Yang, Lin; Liang, Changhong; Chung, Taylor; Kwong, Raymond Y; Saboo, Sachin S

    2014-12-01

    To analyze 15 cases of malposition of branch pulmonary arteries (MBPA) for the hospital-based prevalence, clinical information, surgical outcome, imaging findings, associated cardiovascular and airway abnormalities on cardiovascular computed tomography angiography (CCTA). We retrospectively searched for patients with MBPA from our database consisting of patients referred for CCTA due to known or suspected congenital heart disease and also from all patients receiving chest computed tomography (CT) during the same time period. We analyzed the hospital-based prevalence, image findings, associated cardiovascular anomalies, airway compression, and recorded the clinical information and surgical outcome. Our study showed 15 patients with MBPA (hospital-based prevalence: 0.33% among patients with congenital heart disease and 0.06% in all patients receiving chest CT or CCTA). Classic type was more common than lesser type (67% versus 33%). All patients had associated cardiovascular anomalies, including aortic arch abnormalities (80%) and secondary airway compression (33%). Surgery was performed in 67% of cardiovascular anomalies and 60% of airway stenoses. MBPA has a hospital-based prevalence of 0.33% among patients with congenital heart disease and 0.06% in all patients receiving either chest CT or CCTA. CCTA can delineate the anatomy of MBPA, associated cardiovascular and airway abnormalities for preoperative evaluation. MBPA has a hospital-based prevalence of 0.33% among congenital heart disease patients. Classic type of MBPA was more common than lesser type. All MBPA patients had associated cardiovascular anomalies, 33% had secondary airway compression. CCTA delineates the anatomy of MBPA, associated cardiovascular and airway abnormalities. CCTA is beneficial in MBPA for preoperative evaluation and planning.

  16. Clinical evaluation of midazolam intravenous sedation under bispectral index monitoring on romoval of anterior supernumerary teeth in children%咪达唑仑静脉注射对儿童埋伏多生牙拔除术中镇静效果的临床评价

    Institute of Scientific and Technical Information of China (English)

    关明; 王恩博; 刘宇; 崔念晖; 丁蓓; 张伟

    2012-01-01

    Objective: To evaluate the efficacy and safety of midazolam intravenous sedation plus local anaesthesia on removal of children' s anterior supernumerary teeth in dental clinic. Methods: A total of 41 ASA I children with anterior supernumerary teeth aged 6 to 14 were selected for removal surgery, anaesthesia was done by moderate sedation by midazolam intravenous titration plus local anaesthesia. Heart rate (HR) , blood pressure (BP) , pulse oxygen saturation rate (SpO2) , bispectral index (BIS) and Ramsay sedation score ( RSS) at different time points were recorded (5 min after patient is in operation room, at local anaesthesia injection, at incision, 10 min after incision and at the end of operation). After operation, the overall efficacy of sedation by Houpt rating scale was evaluated by surgeon, anaes-thesiologist and anaesthetic nurse. Results; Among the 41 children, 29 were male, 12 were female, mean age (9.76 ±2.46) years old; The average operation time was (23.83 ±9.98) min, total dose of midazolam was (2. 96 ±0. 92) mg with a dosage rate being (0. 084 ±0. 016) mg/kg. There was a positive correlation between age and total dose (r=0.69, P < 0.01) ; and a negative correlation between age and total dosage (r= -0. 37, P <0. 05). With the decreasing of age, probability for children to move or cry during local anaesthesia can increase, while with the increasing of age, probability for children to memorize the clicking of drill or hammer could increase. The correlation coefficient between RSS and BIS value was r = -0. 854 (P <0.01) , the median BIS value corresponded to RSS of 3 was 75. Pulse oxygen saturation rate was above 95% in all the cases. Conclusion: Sedation by midazolam intravenous titration is a safe and efficient method of anesthesia for removal of children' s anterior supernumerary teeth when BIS value is above 75.%目的:旨在评估咪达唑仑静脉镇静联合局部麻醉拔除儿童上颌理伏多生牙的镇静效果及共安全性.方法:选

  17. 应用改良E型桥体成形上颌前牙缺牙区软组织形态的临床研究%Clinicla research of application of innovative E-po ntic design shaping the soft tissue of missing maxillary anterior teeth

    Institute of Scientific and Technical Information of China (English)

    黄娜; 吕杰; 李平; 唐尤超; 王远勤

    2015-01-01

    目的:评价前牙缺失区应用改良E型桥体成形前牙缺牙区软组织形态的临床效果。方法选择上颌前牙缺失拟行天然牙固定义齿修复的患者19例,行天然基牙的牙体预备,不做传统方法的阶段性临时冠牙龈成形。在石膏代型上进行特殊E型桥体的制作,技师要在石膏代型的预计组织进入深度内创造出唇侧90°的线角和邻间角及斜向舌侧的平面。根据该型设计要点和最终修复体的形态在桥体组织面上行激光外科修整,试戴、粘接修复体。修复结束后2个月和12个月进行治疗后随访。测量记录桥体处牙龈乳头高度水平、龈缘水平、角化龈宽度、改良菌斑指数及改良出血指数。结果随访观察期内所有义齿行使功能良好,修复前和修复后12个月时角化龈宽度分别为3.6 mm和2.7 mm。修复后2个月和修复后12个月改良菌斑指数分别为0.70和0.75,改良出血指数分别为0.25和0.40,近中牙龈乳头高度水平分别为5.49 mm和5.31 mm,远中牙龈乳头高度水平为5.89 mm和5.73 mm,龈缘水平为10.84 mm 和10.48 mm,改良菌斑指数和改良出血指数的差异均无统计学意义;而牙龈乳头高度水平、龈缘水平,角化龈宽度差异有统计学意义。结论应用改良E型桥体成形上颌前牙缺牙区软组织可获得良好的效果。%Objective The purpose of this clinical study was to evaluate the effect of utilizing an innovative E-pontic design in missing maxillary anterior teeth soft tissue area.Methods The patients with the missing anterior teeth who in-tended to receive fixed partial denture restoration were included n this clinical study.At the tooth preparation and impres-sion appointment, the pontic site did not have to be anatomically developed by the provisional at this stage.In the labora-tory setting, the clinician sculpted the approximate outline and predetermined tissue depth on the

  18. Efficacy and Long-term Prognosis of Zirconia All-ceramic Crown Plus Fiber Post for Repair of Ante-rior Teeth Complex Crown Root Fracture%氧化锆全瓷冠加纤维桩修复前牙复杂冠根折的疗效及远期预后分析

    Institute of Scientific and Technical Information of China (English)

    周凌燕; 毛艳; 苏宗佑; 陈俊文; 罗家威; 吕夏

    2016-01-01

    Objective To analyze the efficacy and long-term prognosis zirconia all-ceramic crown plus fiber post to repair anterior teeth complex crown root fracture.Methods From Feb.2008 to Jan.2010 in Affiliated Stomatology Hospital of Guangxi Medical University 110 patients for treatment of anterior teeth crown root fracture were included as research objects,and were divided into observation group and control group according to random number table method,55 cases each.The observation group adopted zirconia all-ceramic crown plus fiber post restoration treatment,an the control group adopted conventional orthodontic traction plus crown lengthening surgery for treatment.The tooth mobility,periodontal probing depth,gingival sulcus bleeding index of the two groups before and after treatment were compared,and 5 years of follow-up was done to compare the long-term prognosis.Results After treatment the tooth mobility,the sulcus bleeding index of the observation group were significantly lower than the control group [ ( 0.19 ±0.04 ) vs ( 0.40 ± 0.11),(0.78 ±0.16) vs (2.01 ±0.27),P <0.01],probing depth of the observation group was signifi-cantly higher than the control group[(5.99 ±0.14) mm vs (3.97 ±0.10) mm,P<0.01],the difference was statistically significant ( P <0.05 );the repair success rate of the observation group was significantly higher than the control group [92.73% (51/55) vs 54.55% (30/55)],the difference was statistically sig-nificant ( P <0.05 ) .Root fracture, secondary caries and periodontal disease incidence of the observation group were significantly lower than the control group [1.82%(1/55) vs 14.55%(8/55),1.82%(1/55) vs 9.09%(7/55),3.64%(2/55) vs 18.18%(10/55)],the differences were statistically significant(P<0.05).Conclusion Zirconia all-ceramic crowns plus fiber post has good clinical efficacy for anterior teeth complex crown root fracture,which can promote tooth mobility,probing depth,and improve sulcus bleeding index,with good long-term prognosis,thus is

  19. Malocclusion (Misaligned Teeth)

    Science.gov (United States)

    ... More Information Medical Dictionary Also of Interest (Quiz) Biology of the Mouth (Video) Root Canal Additional Content Medical News Malocclusion ˌmal-ə-ˈklü-zhən (Misaligned Teeth) By David F. Murchison, DDS, MMS, Clinical Professor, Department of Biological Sciences;Clinical Professor, The University ...

  20. Management of supernumerary teeth

    Directory of Open Access Journals (Sweden)

    Abhishek Parolia

    2011-01-01

    Full Text Available Supernumerary paramolars are the rare anomalies of the maxillofacial complex. These are more common in the maxilla than in the mandible. This article reviews the etiology, frequency, classification, complications, diagnosis and management of supernumerary teeth (bilateral maxillary paramolars

  1. About Kids' Teeth

    Science.gov (United States)

    ... “smile insurance.” Baby Tooth Decay Baby Tooth Decay Is Real As soon as teeth appear in ... of a mouth appliance. Prevent Decay Prevent Kids’ Tooth Decay You can prevent tooth decay for your kids ...

  2. Snow-white teeth

    National Research Council Canada - National Science Library

    Sarll, D

    2006-01-01

    ... well have pointed out, but unavailingly, that snow-white teeth adorn only the grins of infants.There is, however, another ploy that colleagues might try in their quest to enlighten patients, particularly those of a literary disposition: adduce the attributes of 'youthful beauty' given to us by Virginia Woolf (1882 - 1941). From her novel, Orla...

  3. The Use of Glass-fibers Ribbon and Composite for Prosthetic Restoration of Missing Primary Teeth-Laboratory and Clinical Research

    OpenAIRE

    Zilberman, Uri; Lasilla, Lippo

    2014-01-01

    Very few modalities can be used for restoring missing primary anterior teeth, although the impact of missing anterior teeth during early childhood can be harmful. In the permanent dentition the use of glass-fibers ribbon and composite materials are frequently used for restoring missing teeth with no or minimal preparation. The purpose of this study was to examine the possibility to use the glass-fibers ribbon (ever-Stick from GC Corporation, Japan) together with esthetic composite materials (...

  4. Anterior makeover on fractured teeth by simple composite resin restoration

    OpenAIRE

    2011-01-01

    Background: In daily practice dentists usually treat tooth fractures with more invasive treatments such as crown, veneer and bridges which preparation require more tooth structure removal. While currently there is trend toward minimal invasive dentistry which conserves more tooth structure. This is enhanced with the vast supply of dental materials and equipment in the market, including restorative materials. Provided with these supporting materials and equipment and greater patient’s demand f...

  5. Aesthetic approach for anterior teeth with enamel hypoplasia

    Directory of Open Access Journals (Sweden)

    Josué Martos

    2012-01-01

    Full Text Available Enamel hypoplasia is a developmental defect of the enamel that is produced by a disturbance in the formation of the organic enamel matrix, clinically visible as enamel defects. Disorders that occur during the stages of enamel development and maturation reduce the amount or thickness of the enamel, resulting in white spots, tiny grooves, depressions and fissures in the enamel surface. The complexity and intensity of the dental deformity lesions will conduct the ideal treatment-associating conservative techniques. This article presents a case report of a restorative treatment of enamel hypoplasia using hybrid composite resin to mask color alteration and enamel defects. An aesthetic appearance that respects the tooth polychromatic and the self-esteem of the patient can be achieved with this approach.

  6. Prevalence of anterior teeth fracture among visually impaired individuals, India

    Directory of Open Access Journals (Sweden)

    Anil Agrawal

    2013-01-01

    Conclusion: The prevalence of dental injuries in a group of individuals with blind. This should alert caregivers to carry out a profound investigation of the events and suggest methods to reduce this type of morbidity.

  7. Mouth and Teeth (For Parents)

    Science.gov (United States)

    ... Reading Is Your Child Too Busy? Helping Your Child Adjust to Preschool School Lunches Kids and Food: ... in this article? Basic Anatomy of the Mouth and Teeth Normal Development of the Mouth and Teeth What the Mouth ...

  8. Mesiodistal crown diameters of the primary and permanent teeth in southern Chinese--a longitudinal study.

    Science.gov (United States)

    Yuen, K K; So, L L; Tang, E L

    1997-12-01

    The mesiodistal crown diameters of the primary and permanent teeth were measured on serial casts of 112 Hong Kong Southern Chinese (61 males and 51 females) taken at 5.68 and 12.31 years of age. None of the teeth showed significant sex difference in bilateral asymmetry, and significant bilateral asymmetry was found only for the upper primary second molars. The asymmetries were small and the sizes of the antimeres were averaged. Posterior teeth were generally less variable than anterior teeth in both dentitions in Chinese, which is contrary to other reports, but the anterior tooth of each morphological class was, in general, less variable than the posterior member. Male teeth were larger than those of females except for the lower central and lateral incisors in both dentitions, but the difference was not statistically significant. None of the primary teeth nor three of the permanent teeth were found to have significant sex differences in size. Percentage sexual dimorphism ranged from 0.06 to 1.97 per cent for the primary teeth and from 0.36 to 5.27 per cent for the permanent teeth. In the primary dentition, molars were the most dimorphic teeth in both arches, while upper incisors and lower canine were the least dimorphic teeth in their own arch. Among the permanent teeth, the canines were the most dimorphic and the incisors were among the least dimorphic teeth in both arches. Tooth sizes in both dentitions were, in general, larger than those of the Caucasians, comparable with Northern Chinese, but smaller than those of Australian Aboriginals.

  9. 上颌前牙区不翻瓣即刻牙种植术对患者口腔内软硬组织的影响分析%Analysis of Maxillary Anterior Teeth Area Flapless Dental Implants Immediately to Soft and Sclerous Tissue in the Mouth

    Institute of Scientific and Technical Information of China (English)

    刘伟林

    2015-01-01

    Objective:To study maxillary anterior teeth area flapless dental implants immediately to soft and sclerous tissue in the mouth .Method:From Mar.2010 to Mar.2013 in our hospital with surgery treat-ment of front teeth or premoLar repair patients 100 cases as the research object .In digital method of 50 cases was randomly divided into observation group and control group of 50 cases.The control group was treated with flap of immediate implant surgery , while the observation group was treated with flapless dental implants im-mediately surgery , statistics and compared two groups of postoperative overall situation , sclerous and soft tis-sue following surgery , and PES grading and VAS score before and after the treatment .Result:The postoper-ative pain and swelling of 1 day ratio in observation group were significantly lower than the control group , and 12 months after gingival papilla index proportion was significantly higher than the control group , differences were statistically significant (all P 0.05) .Observation group of 12 months after the operation of the crest of absorption value was significantly less than the control group;the difference was statistically significant ( P 0.05) .PES rating of the two groups after treatment , and VAS scores were raising before the treatment , but the rising degree of observation group was significantly higher than the control group, the difference was statistically significant (P <0.05).Conclusion: Maxillary anterior teeth area flapless dental implants immediately , curative effect is better , which has more aesthetic feeling , is worth promoting .%目的:研究分析上颌前牙区不翻瓣即刻牙种植术对患者口腔内软硬组织的影响。方法:选择2010年3月至2013年3月在我院接受手术治疗的前牙或者前磨牙修复患者100例作为研究对象。以数字法随机分成观察组50例以及对照组50例。对照组实施翻瓣的即刻牙种植手术,观察组则实施不翻瓣的即刻牙

  10. Iatrogenic mid-root perforation of fused teeth

    Directory of Open Access Journals (Sweden)

    Vijay Kumar

    2012-01-01

    Full Text Available Fusion is defined as a union between the dentin and/or enamel of two or more distinct dental sprouts that occurs at any stage of the dental organ. Its prevalence ranges from 0.5%-2.5% in the primary dentition alone and 0.1%-1% of the primary as well as the permanent dentition. These fused teeth can cause various problems such as caries, periodontal disease, abnormal eruption, impaction or an ectopic eruption of an adjacent tooth and reported in the literature. However this paper documented an unusual case of iatrogenic root perforation of fused permanent lower anterior teeth during inter maxillary fixation.

  11. A multicenter randomized 5-year clinical evaluation of restoration made of Ni-Cr porcelain-fused-to-metal with or without gold-plating for anterior teeth%镍铬烤瓷与镀金镍铬烤瓷前牙修复体5年随机效果评价

    Institute of Scientific and Technical Information of China (English)

    吴玮; 张清磊; 卢丹; 何帅; 王文莲

    2012-01-01

    目的:评价镀金镍铬烤瓷修复体与镍铬烤瓷修复体在3个单位用于前牙修复的5年临床效果.方法:对3个单位158例患者的268颗天然牙随机分为2组:134颗镍铬合金烤瓷(对照组)与134颗镀金烤瓷修复体(镀金组)进行上前牙固定修复,分别于粘结时、3个月、6个月、1年、3年及5年对比评价其修复效果,主要临床观察指标为牙龈变色与探诊出血情况.结果:两组修复体临床戴入时均未发生探诊出血情况,对照组有3颗发生了牙龈变色(2.24%),镀金组也有1颗发生了牙龈变色(0.75%),两组之间存在显著差异(P<0.05).3个月后有1例镍铬烤瓷修复体出现牙龈探诊出血(0.75%),而牙龈变色的表现与基线无明显变化(P>0.05),镀金烤瓷组无变化.1年、3年及5年复诊时镀金烤瓷冠与镍铬合金烤瓷冠相比,较少出现烤瓷冠边缘牙龈变色和牙龈灰线及探诊出血情况(P<0.05).结论:本研究5年临床观察结果提示镀金镍铬烤瓷冠用于前牙修复短期效果较为理想,且较镍铬烤瓷冠良好,但是随着应用时间的延长,其美学效果逐步降低.%Objective To evaluate the 5-years clinical quality of gold-plating technique used in Ni-Cr metal ceramic restorations in anterior teeth in 3 units. Methods 268 teeth of 158 cases from 3 units were radonmaziedlly divided into two groups. 134 teeth of control group were restored with Ni-Cr metal ceramic crown, while 134 teeth in gold-plating group were treated with gold -plating technique on the Ni -Cr metal restorations.Gingival discoloration, bleeding on probing (BOP) were examined at baseline,3 months,6 month, 1 year,3 years and 5years after restoration cementation. Chisquare test was used for statistical analysis with software SPSS 18.0. Results Gingival discolorations were found in 3 cases of control group (2.24%), 1 case in gold-plating group (0.75%) at baseline, there was significant difference between 2 groups (P<0.05), while

  12. INCIDENCE OF SILICONE RUBBER IMPRESSION MATERIAL FOUND IN THE GINGIVAL SULCUS AFTER IMPRESSION PROCEDURE FOR FIXED PARTIAL DENTURES OF MAXILLARY ANTERIOR TEETH%上前牙固定修复中硅橡胶印模材料龈沟残留的观察

    Institute of Scientific and Technical Information of China (English)

    周鹏; 石连水; 曾永发; 张林

    2013-01-01

    目的分析评估用硅橡胶二次印模法制取上前牙印模中的龈沟残留材料情况,为临床安全使用硅橡胶印模材料提供指导。方法对135颗拟行固定修复的上前基牙使用硅橡胶二次印模法制取印模后,观察并记录印模基牙龈沟翼缺损数,并依次用以下两种方法检查口内基牙龈沟中硅橡胶印模材料残留情况:A:采用肉眼直视下观察基牙龈沟,B:在5倍放大镜下继续用刮治器探寻基牙龈沟;分别记录材料残留数量与位置。结果135颗上前牙印模在肉眼直视下见24颗印模翼缘缺损,口内直视观察发现9颗基牙龈沟硅橡胶残留,继续放大镜下用刮治器探查,又发现13例龈沟深部残留。结论硅橡胶印模龈沟残留现象比较常见且容易被忽略,应引起临床医师的的高度重视,印模后应常规使用刮治器械探查龈沟内是否有印模材料的残留现象。%Objective: To evaluate the incidence rate of silicone rubber impression material remaining in the gingival crevice after removal of the set impression. Methods: A total of 135 anterior abutment teeth were prepared for complete coverage restorations. Curette were used to find the remaining pieces of impression material with a forehead type magnifying glass. Results:An inspection of the impression after removal, revealed defect in the sulcus region of 24 teeth. Subsequent visual inspection of the sulcus revealed 9 and a further exploration of the sulcus with curette revealed 13. Conclusion:For being relatively easy to ignore silicone rubber impression of gingival sulcus residual phenomenon after impression procedures, it should cause clinicians more attention to it. It would be prudent to consider a routine curettage of abutment sulci after impression-making.

  13. Application of ultrasound biomicro-scopy in the planning of cataract surgery in anterior megalophthalmos

    Directory of Open Access Journals (Sweden)

    Mohammad Ali Zare

    2011-01-01

    Full Text Available Anterior megalophthalmos, a rare hereditary disorder, is macrocornea (horizontal corneal diameter more than 13 mm in association with enlarged lens-iris diaphragm and ciliary ring. One of the major challenging issues in the cataract surgery of these patients is preventing intraocular lens (IOL malposition, because of probable large capsular bag. Several approaches have been selected by previous surgeons, such as, custom-made anterior chamber IOLs. In this study, we show a normal capsular bag diameter despite ciliary ring enlargement, with application of ultrasound biomicroscopy (UMB. We suggest that in cases of anterior megalophthalmos without phacodonesis, UBM could measure the actual size of the capsular bag and obviate the need for further procedures.

  14. 安氏Ⅱ类2分类错牙合上前牙冠根形态的锥形束CT分析%A cone-beam computed tomography study on crown-root morphology of maxillary anterior teeth in Class Ⅱ,division 2 malocclusion

    Institute of Scientific and Technical Information of China (English)

    黎敏; 王斯维; 赵一姣; 刘怡

    2016-01-01

    Objective:To study crown-root morphology of maxillary anterior teeth in ClassⅡ,division 2 malocclusion using cone-beam CT (CBCT)combined with computer aided measurement technology to provide guidance for clinical treatment.Methods:The samples which consisted of 36 cases radiographed with CBCT techniques were selected and divided into two groups (1 8 each )based on the type of maloc-clusion presented:ClassⅡ,division 2 group (groupⅡ2)and ClassⅠgroup (groupⅠ).The measure-ments of crown-root morphology including crown-root angle and surface-shaft angle were got by Multiple Planer Reconstruction of CBCT data uploaded into InvivoDental software 5.0.The data were processed with SPSS 20.0 software package and t test was employed for comparison of angular measurements. Results:In group Ⅰ,crown-root angles of maxillary central incisor,maxillary lateral incisor and maxillary canines were 1 79.08°±3.31 °,1 76.55°±2.77°and 1 84.20°±2.51 °respectively, surface-shaft angles were 21 .00°±2.63°,1 9.63°±2.35°and 1 9.36°±2.30°respectively. While in group Ⅱ 2 ,crown-root angles of maxillary central incisor,maxillary lateral incisor and maxillary canines were 1 76.80°±2.62°,1 74.1 3°±3.28°and 1 81 .79°±2.88°respectively, surface-shaft angles were 23.20°±2.95°,22.29°±2.1 9°and 20.61 °±2.34°respectively. Compared with group Ⅰ,significant statistical differences were observed with the exception of sur-face-shaft angle of maxillary incisor.There was significant difference in crown-root angle between group Ⅱ2 and 1 80 °.Conclusion:The maxillary anterior teeth in ClassⅡ,division 2 malocclusion exhibited significant crown-root morphology which would influence the torque after orthodontic treat-ment.Special attention should be paid to the position of maxillary anterior teeth roots during ortho-dontic treatment for Class Ⅱ,division 2 malocclusion.The ideal position of tooth movement should be decided by the root rather than the

  15. [Multiple retained deciduous teeth: a case report].

    Science.gov (United States)

    Wang, Jing; Lai, Wen-Li

    2009-06-01

    Retained deciduous teeth are defined as the succedaneous permanent teeth have erupted while the primary teeth were retained, or the permanent teeth unerupted while the primary teeth remained in the permanent dentition. One case of multiple retained deciduous teeth was reported.

  16. MULTIPLE RETAINED TEETH IN MANDIBLE: A Case Report

    Directory of Open Access Journals (Sweden)

    Cvetan Cvetanov

    2010-07-01

    Full Text Available Purpose: The aim of this science report is to show a rare case of multiple impacted teeth at adult patient and our propose clinical approach.Materials and methods: The clinical case is showed from adult man /64-year old/ with multiple impacted teeth (6 impacted teeth in the anterior place on the mandible were not suggestive of any syndrome or metabolic disorder. The extraction of the impacted teeth was made on two stage with piezosurgery unit under local anaesthesia. For prevention of postsurgical complications, as a swelling and prevention of postsurgical resorbtion were used coneshapes from pressure xeno colagen. To base on clinical and radiological examination we will discuss the differential diagnosis and we will offer a clinical approach about decided the case.Result and Conclusion: The incidence of multiple retained teeth by literature research range from 10.9% to 40.4%, most frequently is the retention of the third molars. In the literature most rarely have clinical reports about multiple retained teeth which differ from third molars at adult patients. The rare clinical case we showed is very demonstrative and the medicative approach which we used gave excellent result.

  17. [Infants wearing teething necklaces].

    Science.gov (United States)

    Taillefer, A; Casasoprana, A; Cascarigny, F; Claudet, I

    2012-10-01

    Numerous infants wear teething necklaces, a quack remedy with a real risk of strangulation or aspiration of small beads. Evaluate parental perceptions and beliefs about the use of teething necklaces and analyze parental knowledge about the associated dangers. Between March and July 2011, in three different pediatric units of a tertiary children's hospital and a general hospital in Toulouse and Montauban (southwest France), voluntary parents were invited to be interviewed about their child wearing a teething necklace. The interviews were conducted following an anthropological approach: they were recorded and then fully transcribed and analyzed. Parents were informed that the conversation was recorded. During the study period, 48 children were eligible. Eleven families refused to participate, 29 parents were interviewed face to face. The children's mean age was 14 years ± 7 months, the male:female ratio was equal to 0.8 (12 boys, 15 girls). The mean age of children when necklace wearing was started was equal to 4 ± 2 months. The mean mother's age was 31 ± 5 years and 33 ± 4 years for fathers. The parents' religion was mostly Catholic (60%). Teething necklaces were mainly made of amber (n=23). Sales information about the risks associated with the necklaces was for the most part absent (92%). The most frequent positive parental perceptions were analgesic properties and a soothing remedy (73%); a birth accessory and memory (64%); an esthetic accessory (60%); a protective amulet (60%); and an alternative or additional element to other traditional therapeutics (55%). The negative parental perceptions (n=4) were an unnecessary accessory, costume jewelry, a pure commercial abuse of a popular belief, a dangerous item with a risk of strangulation, and the absence of proof of its efficacy. Although parents concede that teeth eruption is benign, they fear its related symptoms. To a natural phenomenon a natural response: they use a necklace to satisfy the analogy. The

  18. Eruptive malpositioning of the mandibular permanent lateral incisors: three case reports.

    Science.gov (United States)

    Bradley, E J; Bell, R A

    1990-01-01

    Ectopic eruption of the mandibular permanent lateral incisors involving the loss of the adjacent primary canines is not uncommon, yet the extreme distalization and transposition of such teeth (partial or true) has been reported infrequently. Three cases that illustrate various anomalous eruption-exfoliation patterns are presented. Theories that attempt to explain the etiology of anomalous eruption positions are discussed. However, the multifactorial process of growth and development makes it difficult to identify specific primary etiological factors. Treatment options also are discussed and illustrated, with emphasis on early orthodontic intervention for optimal results.

  19. New teeth from old: treatment options for retained primary teeth.

    Science.gov (United States)

    Robinson, S; Chan, M F W-Y

    2009-10-10

    Retention of primary teeth beyond their expected exfoliation date is encountered relatively frequently. Most commonly this is due to absence of the permanent successor. In this article patient assessment and the restorative treatment options are discussed with particular emphasis on retention of the primary tooth/teeth in the medium to long-term. The restorative techniques that may be used to improve aesthetics and function of retained primary teeth are illustrated. Consideration of this minimally invasive approach is commended in such cases.

  20. Teeth number anomalies in permanent dentition among non-syndromic dental patients.

    Science.gov (United States)

    Aslan, Belma Işik; Akarslan, Zühre Zafersoy

    2013-03-01

    The aim of this study was to establish teeth number anomalies in relation to gender, tooth type, location, distribution pattern and the association between frequently missing teeth among a group of dental patients in Turkey. A total of 378 non-syndromic patients (240 females and 138 males) with an age range of 7-45 (x +/- SD = 22.07 +/- 3.6) having evidence of absent or excess teeth were evaluated in the study. Pearson Chi-square, Fisher's exact, McNemar and Kappa coefficients were used for statistical analysis. 237 patients had a total of 546 congenitally missing teeth and 141 had 185 excess teeth. Congenitally missing teeth were more commonly seen rather than the presence of supernumerary teeth. Difference was determined in the frequent locations of congenital missing and supernumerary teeth. The most frequent missing tooth type was found to be the mandibular second premolar (26.6%), while the majority of supernumerary teeth were located in the anterior region of the maxillary arch (37.9%). Both teeth number anomalies were more commonly seen among females. In hypodontia cases the occurrence of symmetrical agenesis of laterals and second premolars in maxilla; centrals and second premolars in mandible was notable. Agenesis of mandibular centrals was found to be associated with maxillary lateral agenesis in males. Also higher prevalence of molar teeth agenesis was determined in the occurrence of at least 4 teeth agenesis. These findings will serve as information about the contemporary demographic pattern of teeth number anomalies among non-syndromic Turkish dental patients and can provide evidence that agenesis of some teeth symmetrically or together are the products of the same genetic mechanisms.

  1. 脱细胞真皮基质用于前牙即刻种植扩增角化龈的临床研究%Clinical Observation of Peri-implants Keratinized Tissue Augmented in Anterior Teeth with Acellular Dermal Matrix Xerograft

    Institute of Scientific and Technical Information of China (English)

    彭国光; 谢建雅; 夏炜; 严鑫; 吴俊伟; 沈琳; 吴美珍; 谭玉莲

    2011-01-01

    Objective To evaluate the effectiveness of acellular dermal matrix (ADM) xerograft in increasing the width and esthetics of keratinized gingiva around anterior immediate dental implants. Methods Twenty patients received ADM xerograft with/without guided bone regeneration ( GBR ) after immediate implants in maxillary or mandibular anterior regions. The width of keratinized gingiva was recorded at 3 and 6 months after final porcelain crown restoration. The parameter was compared to the mean width of adjacent teeth, and the implant gingival papilla was evaluated with Jemt' s classification. Results ADM xerografts provided satisfactory results. The width and esthetics of the gingival/papilla in immediate implants were no difference (P >0.05) with them in the natural adjacent teeth, and the position before operation. Conclusion The width of keratinized tissues was augmentation by using the ADM xerograft.%目的 研究脱细胞真皮基质用于前牙即刻种植扩增角化龈的临床效果.方法 唇侧骨板垂直缺损不超过牙根长度1/3的单颗前牙即刻种植病例20例,拔除患牙即刻种植,利用异种脱细胞真皮基质双层封闭植牙创口,并与周围黏膜加压严密缝合,2~3周拆线,8~12周行冠修复.冠修复后3、6个月,从龈缘高点到膜龈联合线测量种植牙角化龈的宽度,和邻牙及术前角化龈的宽度进行比较,并对种植牙的龈乳头进行美学评价.结果 20颗种植牙的角化龈宽度与种植前相比无明显差异,与相邻牙也无明显差异,膜龈联合线自然;17例种植牙的龈乳头达到Jemt氏分类的2级、3级.种植前,20颗种植牙的角化龈宽度为(4.460±0.220) mm,冠修复后3个月为(4.451±0.245) mm,正常邻牙是(4.410±0.189) mm.冠修复后3个月,种植位点角化龈平均宽度与正常邻牙比较(t =1.283,P=0.215)、与术前比较(=0.584,P=0.566),差异均无统计学意义.冠修复后6个月,种植位点角化龈宽度为(4.448±0.223) mm

  2. PES and WES evaluation of CAD/CAM custom abutments and all ceramic crowns in the anterior teeth area%红、白美学评价 CAD/CAM 个性化基台与全瓷冠在前牙区的应用

    Institute of Scientific and Technical Information of China (English)

    张晓真; 周国兴; 戴文雍; 赵毅; 邱憬; 王洁; 汤春波

    2013-01-01

    Objective:To investigate the clinic application of computer aided design&computer aided manufacturing ( CAD/CAM) custom abutments and all ceramic crowns and evaluate their esthetic effect in the anterior teeth area according to the assessment criteria Pink Esthetic Score ( PES ) and White Esthetic Score ( WES ) .Methods:Totally 73 CAD/CAM custom abutments and all ceramic crowns were used in 51 implant-supported prosthesis cases .The esthetic prosthetic effect was evaluated according to the assessment cri-teria PES and WES.Results:The 3-month-follow-up results of totally 73 CAD/CAM custom abutments and all ceramic crowns of 51 pa-tients:the percentage of the PES scores of 10,8-9,6-7 and≤5 was 9.59%,71.23%,17.81%,and 1.37%,respectively;the percent-age of the WES scores of 10,8-9,6-7 and ≤5 was 39.73%,60.27%,0%,and 0%,respectively.The 6-month-follow-up results: the percentage of the PES scores of 10,8-9,6-7 and≤5 was 8.22%,69.86%,17.81%,and 4.11%,respectively;the percentage of the WES scores of 10,8-9,6-7 and≤5 was 36.99%,61.64%,1.37%,and 0%,respectively.The 1-year-follow-up results:the percentage of the PES scores of 10,8-9,6-7 and≤5 was 5.48%,68.49%,20.55%,and 5.48%,respectively;the percentage of the WES scores of 10,8-9,6-7 and ≤5 was 31.51%,64.38%,4.11%,and 0%,respectively.During the follow-up of 1 to 3 years,there was only one abutment got fractured when the torque control was installed ,and one loosened during observation .In all cases,the gingivae were in healthy condition ,and no further obvious gingival retreat or periimplantitis occurred .Conclusions:PES and WES are objective ,integrat-ed and comparable .CAD/CAM custom abutments and all ceramic crowns have good biocompatibility and chemical stability ,and can be more widely used in the anterior teeth area .However,their long term effects need to be confirmed by further follow-up.%目的:研究计算机辅助设计及计算机辅助制作( CAD/CAM )个性化基台及全瓷冠的临床

  3. Clinical management of supernumerary teeth: A report of two cases

    Directory of Open Access Journals (Sweden)

    Mittal M

    2010-09-01

    Full Text Available Supernumerary tooth may closely resemble the teeth of the group to which it belongs, i.e. molars, premolars or anterior teeth, or it may bear little resemblancein size or shape to which it is associated. Many complications can be associated with supernumeraries, like impaction, delayed eruption or ectopic eruption of adjacent teeth, crowding, development of median diastema and eruption into floor of the nasal cavity. This may also cause the formation of follicular cysts with significant bone destruction. Early intervention to remove it is usually required to obtain reasonable alignment and occlusal relationship. This article will present the clinical management of an (i impacted supernumerary tooth impeding the eruption of maxillary central incisor and (ii erupted supernumerary tooth with midline diastema.

  4. Smile design for the adolescent patient--interdisciplinary management of anterior tooth size discrepancies.

    Science.gov (United States)

    Waldman, Alexander B

    2008-05-01

    Adolescent patients often seek orthodontic treatment to correct spacing of the maxillary anterior teeth. If the spacing is caused by a tooth size discrepancy that affects one or more anterior teeth, an interdisciplinary treatment plan involving orthodontic, restorative, and periodontal treatment is recommended to achieve a harmonious esthetic result. This article describes a clinical approach for treatment of these complex cases, focusing on the importance of tooth form, gingival esthetics, and treatment sequencing.

  5. The role of modern imaging techniques in the diagnosis of malposition of the branch pulmonary arteries and possible association with microdeletion 22q11.2.

    Science.gov (United States)

    Cuturilo, Goran; Drakulic, Danijela; Krstic, Aleksandar; Gradinac, Marija; Ilisic, Tamara; Parezanovic, Vojislav; Milivojevic, Milena; Stevanovic, Milena; Jovanovic, Ida

    2013-04-01

    Malposition of the branch pulmonary arteries is a rare malformation with two forms. In the typical form, pulmonary arteries cross each other as they proceed to their respective lungs. The “lesser form” is characterised by the left pulmonary artery ostium lying directly superior to the ostium of the right pulmonary artery, without crossing of the branch pulmonary arteries. Malposition of the branch pulmonary arteries is often associated with other congenital heart defects and extracardiac anomalies, as well as with 22q11.2 microdeletion. We report three infants with crossed pulmonary arteries and one adolescent with “lesser form” of the malformation. The results suggest that diagnosis of malposition of the branch pulmonary arteries could be challenging if based solely on echocardiography, whereas modern imaging technologies such as contrast computed tomography and magnetic resonance angiography provide reliable establishment of diagnosis. In addition, we performed the first molecular characterisation of the 22q11.2 region among patients with malposition of the branch pulmonary arteries and revealed a 3-megabase deletion in two out of four patients

  6. Prevalence and factors associated with anterior open bite in 2 to 5 ...

    African Journals Online (AJOL)

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    eruption of the posterior teeth or the infra eruption of the anterior teeth and it is common in both adults and children. Objective: To evaluate ... formation of an AOB in 2 to 5-year-old children. .... stages and two sampling methods were used: the.

  7. Effects of centric relation prematurities of the frontal teeth.

    Science.gov (United States)

    Rottner, Kurt; Richter, Ernst-Jürgen; Fanghänel, Jochen; Gedrange, Tomas; Kubein-Meesenburg, Dietmar; Nägerl, Hans; Proff, Peter

    2007-01-01

    Centric relation prematurities of frontal teeth are frequently found with patients who have severe orthodontic anomalies or received extensive restorative treatment. They can cause a range of symptoms ranging from loosening of the teeth to temporomandibular disorders (TMD). The objective of this work has been to derive a mathematical description of the mandibular and periodontal forces generated by anterior prematurities for different incisor relations. In order to quantify the effect of contact area (location and inclination) and the tooth inclination, a two-dimensional mathematical approach was used. Vectorisation of the forces and bending moments makes it possible to predict under which conditions the load increase mainly affecting the anterior teeth can and may cause localized pain and eventually loosening and flaring/crowding of the upper/lower incisors and under which conditions the temporomandibular joint will suffer a large increase in retrusive force, which potentially leads to TMD. For 10 patients with anterior prematurities, analysis of the incisor relation was carried out. For all cases the conclusions drawn from the mathematical model were in full agreement with the reported symptoms, which could be successfully treated.

  8. Management of multiple impacted teeth

    Directory of Open Access Journals (Sweden)

    Nidhi Bansal

    2012-01-01

    Full Text Available An impacted or missing permanent tooth can add significant complications to an otherwise straightforward case. When multiple impacted teeth are present, the case complexity increases further. Developing a treatment sequence, determining appropriate anchorage, and planning and executing sound biomechanics can be a challenge. The following case report illustrates a patient with three retained primary teeth and three impacted permanent canines. After careful treatment planning and extraction of multiple primary teeth;, followed by attempted guided eruption of impacted teeth, the patient finished with a significantly improved functional and aesthetic result.

  9. Inhibitory reflex responses of masseter muscle in anterior open bite

    OpenAIRE

    Priyada, SANTILAKANAWONG; Hiroaki, KIRIMOTO; Yoichiro, SEKI; Kunimichi, SOMA; Orthodontic Science, Department of Orofacial Development and Function, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

    2003-01-01

    Animal studies indicated that loss of occlusal contact between maxillary and mandibular teeth causes altered functional activity of periodontal mechanoreceptors. The alteration of periodontal mechanoreceptors may influence jawmuscle reflex and masticatory muscle activity. In this study, the inhibitory reflex response of masseter muscle in subjects with anterior open bite was investigated. The study population included 10 subjects with anterior open bite with no muscle pain or craniomandibular...

  10. A Technique for Staining Extracted Teeth: A Research and Teaching Aid for Bleaching.

    Science.gov (United States)

    1980-10-01

    anterior teeth with intact crowns were scaled with an ultrasonic scalero and polished with a rubber cup and pumice to remove all extrinsic debris. A 35mm...patient and the dentist.4 Hence, the bleaching of these discolored non-vital teeth becomes an extremely important phase of endodontic therapy. 1-6...dentists at the Edward C. Penick Endodontic Study Club stated they never bleached a tooth as an undergraduate. Six chairmen of dental school

  11. Correlation between three color coordinates of human teeth.

    Science.gov (United States)

    Lee, Yong-Keun

    2014-11-01

    The objective was to determine whether there were significant correlations in the three color coordinates within each of two color coordinate systems, such as the Commission Internationale de l’Eclairage (CIE) L*a*b* system, and the lightness, chroma, and hue angle system, of human vital teeth. The color of six maxillary and six mandibular anterior teeth was measured by the Shade Vision System. Pearson correlations between each pair of the color coordinates were determined (α=0.01 ). The influence of two color coordinates on the other color coordinate was determined with a multiple regression analysis (α=0.01 ). Based on correlation analyses, all the color coordinate pairs showed significant correlations except for the chroma and hue angle pair. The CIE L* was negatively correlated with the CIE a*,b*, and chroma, but positively correlated with the hue angle. The CIE a* was positively correlated with the CIE b* and chroma. Tooth color coordinates were correlated each other. Lighter teeth were less chromatic both in the CIE a* and b* coordinates. Therefore, it was postulated that the three color coordinates of human teeth were harmonized within certain color attribute ranges, and a lack of correlations in these coordinates might indicate external/internal discolorations and/or anomalies of teeth.

  12. Uncovering labially impacted teeth: apically positioned flap and closed-eruption techniques.

    Science.gov (United States)

    Vermette, M E; Kokich, V G; Kennedy, D B

    1995-01-01

    The purpose of this study was to examine the esthetic and periodontal differences between two methods of uncovering labially impacted maxillary anterior teeth: the apically positioned flap and closed-eruption techniques. The sample consisted of 30 patients who were recalled a minimum of three months after orthodontic treatment of a unilateral labially impacted maxillary anterior tooth. Eighteen of the patients had undergone an apically positioned flap (APF) procedure, and the remaining twelve had undergone the closed-eruption (CE) technique. In the CE group, clinical examination showed less width of attached gingiva on the distal surface and increased probing bone level on the facial surface of the uncovered teeth relative to their contralateral controls. Uncovered teeth in the APF group showed more apical gingival margins on the mesial and facial surfaces; greater crown length on the midfacial surface; increased probing attachment level on the facial surface; increased width of attached gingiva on the facial surface; increased probing bone level on mesial, facial, and distal surfaces; and gingival scarring. Radiographic examination showed shorter roots on the uncovered teeth in both groups. Photographic examination revealed vertical relapse of the uncovered teeth in the APF group. We conclude that labially impacted maxillary anterior teeth uncovered with an apically positioned flap technique have more unesthetic sequalae than those uncovered with a closed-eruption technique.

  13. Robot-assisted Anterior Odontoid Screw Fixation: A Case Report.

    Science.gov (United States)

    Tian, Wei; Wang, Han; Liu, Ya-Jun

    2016-08-01

    Anterior odontoid screw fixation has been proved to be effective but technically challenging because the difficult approach is associated with high risks of screw malposition and damage to surrounding vital structures. Navigation techniques are therefore increasingly being used to improve safety and accuracy. However, no robot-assisted odontoid screw fixation has yet been reported. We here report a 61-year-old woman with a type II dens fracture on whom anterior odontoid screw fixation was performed under the guidance of a newly developed robotic system (TiRobot, co-designed by Beijing Jishuitan Hospital and TINAVI Medical Technologies). One odontoid screw was safely and accurately placed, the calculated deviation between the planned and actual positions being 0.9 mm. No intraoperative complications were identified and the patient was discharged on Day 5. Follow-up studies after 2 weeks showed good clinical and radiological results. We believe this is the first reported case of robot-assisted anterior odontoid screw fixation. We consider that complicated procedures can become feasible, safe and accurate using TiRobot systems.

  14. Effects of the marginal position of porcelain fused metal crown on beauty and periodontal health for anterior teeth%不同金瓷冠边缘位置对前牙区美容和牙周健康的影响

    Institute of Scientific and Technical Information of China (English)

    张志慧

    2015-01-01

    Objective To explore the influence of the marginal position of porcelain fused metal crown on beauty and periodontal health for anterior teeth. Methods 96 patients were treated by porcelatin fused metal crowns and were randomly divided into three groups. According to the difference in the marginal position of the crown patients were with crown margins up the gingival level,at the gingival level and under the gingival level.The degee of satisfaction,gingival crevicular fluid volume (GCF) , aspartate(AST) and alkaline phosphatase(ALP) were investigated at 1-month,3-month and 6-month after premanent restoration. Results The satisfaction survey of under the gingival level group and at the gingival level group were higher than up the gingival level group's.There was significant statistically difference. Conclusion Based on the results of this study, the crown with gingival margin at gingival level is better than others.Crown margin at gingival level should been chosen at most times by dentists.%目的:探讨不同冠边缘设计对前牙区金瓷全冠修复患者的美观和牙周健康的影响。方法:选择需进行金属熔附烤瓷全冠修复病例96例,随机分成3个治疗组,根据冠的颈缘位置不同分别采用龈上冠边缘修复、平龈冠边缘修复和龈下冠边缘修复,调查3组患者全冠戴入后患者美观满意度,检测全冠戴入后龈沟液量及AST、ALP活性的变化。结果:龈下冠边缘修复和平龈冠边缘修复组患者美观满意度明显较龈上冠边缘修复组高;龈上冠边缘修复和平龈冠边缘修复组患者对牙周损伤明显较龈下冠边缘修复组低,差异均具有统计学意义(P<0.05)。结论:全冠平龈冠边缘修复设计既不影响患者对美观方面的需求,又对龈沟液的影响较小,优于龈上冠边缘修复和龈下冠边缘修复,不考虑其他影响因素时,临床应优先选择。

  15. Keeping Your Child's Teeth Healthy

    Science.gov (United States)

    ... options than ever. A silver-colored material called amalgam (a special mix of metals) was once the substance of choice for most fillings in permanent teeth. But now, other materials like composite resins are becoming popular. Resins bond to the teeth ...

  16. Improved pathologic teeth migration following gingivectomy in a case of idiopathic gingival fibromatosis.

    Science.gov (United States)

    Seki, Keisuke; Sato, Shuichi; Asano, Yukhiro; Akutagawa, Hideyasu; Ito, Koichi

    2010-01-01

    A case is reported of a 20-year-old woman with generalized severe gingival overgrowth covering almost all of the teeth with diastemata, diagnosed as idiopathic gingival fibromatosis. After initial therapy, the patient underwent surgery consisting of a full-mouth internal beveled gingivectomy. Postoperatively, the maxillary anterior teeth spontaneously moved to almost optimal positions. Removing the cause by gingivectomy can lead to spontaneous correction of the pathologic tooth migration. With supportive periodontal treatment, the patient showed no recurrence of gingival enlargement or repositioning of the teeth at the 5-year follow-up.

  17. Multiple supernumerary teeth and odontoma in the maxilla: A case report

    Directory of Open Access Journals (Sweden)

    P B Sood

    2010-01-01

    Full Text Available Most supernumerary impacted teeth are located in the anterior maxillary region. They are classified according to their form and location. Their presence may give rise to a variety of clinical problems. The detection of supernumerary teeth is best achieved by thorough clinical and radiographic examination. Their management should form part of a comprehensive treatment plan. This article presents an overview of the diagnostic problems associated with multiple supernumerary impacted teeth and includes a discussion of the classification, diagnosis, and management of this difficult clinical entity.

  18. Rehabilitation of severely mutilated teeth under general anesthesia in an emotionally immature child.

    Science.gov (United States)

    Navit, S; Katiyar, A; Samadi, F; Jaiswal, J N

    2010-01-01

    Dental caries is the single most common chronic childhood disease. In rampant caries, there is early pulp involvement and gross destruction of the maxillary anterior teeth as well as posterior teeth. This leads to decreased masticatory efficiency, difficulty in speech, compromised esthetics, development of abnormal tongue habits and subsequent malocclusion and psychological problems. The restoration of severely decayed primary incisors is often a procedure that presents a special challenge to dentists, particularly in an uncooperative child. This case report documents the restoration of severely mutilated deciduous teeth in an emotionally immature patient under general anesthesia.

  19. Polycarbonate crowns for primary teeth revisited: Restorative options, technique and case reports

    Directory of Open Access Journals (Sweden)

    Karthik Venkataraghavan

    2014-01-01

    Full Text Available Esthetics by definition is the science of beauty - that particular detail of an animate or inanimate object that makes it appealing to the eye. In the modern, civilized, and cosmetically conscious world, well-contoured and well-aligned white teeth set the standard for beauty. Such teeth are not only considered attractive but are also indicative of nutritional health, self esteem, hygienic pride, and economic status. Numerous treatment approaches have been proposed to address the esthetics and retention of restorations in primary teeth. Even though researchers have claimed that certain restorations are better than the others, particularly owing to the issues mentioned above, the search for the ideal esthetic restoration for the primary teeth continues. This paper revisits and attempts to reintroduce the full coverage restoration, namely, polycarbonate crown, for use in primary anterior teeth.

  20. Polycarbonate crowns for primary teeth revisited: restorative options, technique and case reports.

    Science.gov (United States)

    Venkataraghavan, Karthik; Chan, John; Karthik, Sandhya

    2014-01-01

    Esthetics by definition is the science of beauty - that particular detail of an animate or inanimate object that makes it appealing to the eye. In the modern, civilized, and cosmetically conscious world, well-contoured and well-aligned white teeth set the standard for beauty. Such teeth are not only considered attractive but are also indicative of nutritional health, self esteem, hygienic pride, and economic status. Numerous treatment approaches have been proposed to address the esthetics and retention of restorations in primary teeth. Even though researchers have claimed that certain restorations are better than the others, particularly owing to the issues mentioned above, the search for the ideal esthetic restoration for the primary teeth continues. This paper revisits and attempts to reintroduce the full coverage restoration, namely, polycarbonate crown, for use in primary anterior teeth.

  1. Notching and anterior beveling on fossil horse incisors: Indicators of domestication?

    Science.gov (United States)

    Rogers, Richard A.; Rogers, Laurine A.

    1988-01-01

    One of the lines of evidence cited for possible late Pleistocene human control of horses has been the presence of notching and anterior beveling on horse incisor teeth recovered from upper and middle Paleolithic sites in Europe. Similar forms of wear have been found on the incisor teeth of wild horses from early and middle Pleistocene deposits in North America. Notching appears partly due to malocclusion and chipping. The causes of beveling are less certain but may involve the eating of bark. Therefore, the presence of notching and anterior beveling on horse incisor teeth may not be a reliable indicator of human control.

  2. Triple Teeth: Report of an Unusual Case

    OpenAIRE

    Prashant Babaji; M. A. Prasanth; Gowda, Ajith R.; Soumya Ajith; Henston D'Souza; Ashok, K. P.

    2012-01-01

    Fusion or synodontia is a union of two or more than two developing teeth. Commonly fusion occurs between teeth of the same dentition, mixed dentition, or between normal and supernumerary teeth. Fused primary teeth present with several clinical problems like caries, periodontal problem, arch asymmetry, delayed eruption, ectopic eruption of succedaneous teeth, aesthetic, and other complications. This paper presents a rare and unusual case of triple teeth in mandibular primary dentition.

  3. Triple Teeth: Report of an Unusual Case

    Directory of Open Access Journals (Sweden)

    Prashant Babaji

    2012-01-01

    Full Text Available Fusion or synodontia is a union of two or more than two developing teeth. Commonly fusion occurs between teeth of the same dentition, mixed dentition, or between normal and supernumerary teeth. Fused primary teeth present with several clinical problems like caries, periodontal problem, arch asymmetry, delayed eruption, ectopic eruption of succedaneous teeth, aesthetic, and other complications. This paper presents a rare and unusual case of triple teeth in mandibular primary dentition.

  4. Management of anterior dental crossbite with removable appliances

    Directory of Open Access Journals (Sweden)

    Ayca Tuba Ulusoy

    2013-01-01

    Full Text Available This case report describes the treatment of an 8-year-old girl with anterior dental crossbite using a series of removable appliances to bring the teeth into a normal position. Clinical presentation and intervention: A removable acrylic appliance with a bite plate incorporating a screw was used to correct the anterior dental crossbite and align the incisors. The subsequent eruption of the maxillary left lateral incisor on the palatinal side was treated with a second acrylic plate incorporating a labiolingual spring. After an 8-month period, the anterior crossbite involving multiple incisors was corrected.

  5. Supernumerary Teeth in Nepalese Children

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    Varun Pratap Singh

    2014-01-01

    Full Text Available Objective. The objectives of the present study were to investigate the prevalence and characteristics of supernumerary teeth in a patient sample of Nepalese children. Study Design. A survey was performed on 2684 patients (1829 females and 1035 males ranging in age from 6 to 14 for the presence of supernumerary teeth. For each patient with supernumerary teeth the demographic variables (age and sex, number, location, eruption status, and morphology were recorded. Descriptive statistics were performed. Results. Supernumerary teeth were detected in 46 subjects (1.6%, of which 26 were males and 20 were females with a male : female ratio of 1.3 : 1. The most commonly found supernumerary tooth was mesiodens followed by maxillary premolars, maxillary lateral incisor, and mandibular lateral incisor. Of the 55 supernumerary teeth examined, 58.18% (n=32 had conical morphology, followed by tuberculate (30.90%, n=17 and supplemental (10.90%, n=6 forms. The majority of the supernumerary teeth were erupted (56.36%, n=31. Conclusion. The prevalence of supernumerary teeth in Nepalese children was found to be 1.6%, the most frequent type being mesiodens. Conical morphology was found to be the most common form of supernumerary tooth.

  6. Supernumerary teeth in Nepalese children.

    Science.gov (United States)

    Singh, Varun Pratap; Sharma, Amita; Sharma, Sonam

    2014-01-01

    The objectives of the present study were to investigate the prevalence and characteristics of supernumerary teeth in a patient sample of Nepalese children. A survey was performed on 2684 patients (1829 females and 1035 males) ranging in age from 6 to 14 for the presence of supernumerary teeth. For each patient with supernumerary teeth the demographic variables (age and sex), number, location, eruption status, and morphology were recorded. Descriptive statistics were performed. Supernumerary teeth were detected in 46 subjects (1.6%), of which 26 were males and 20 were females with a male : female ratio of 1.3 : 1. The most commonly found supernumerary tooth was mesiodens followed by maxillary premolars, maxillary lateral incisor, and mandibular lateral incisor. Of the 55 supernumerary teeth examined, 58.18% (n = 32) had conical morphology, followed by tuberculate (30.90%, n = 17) and supplemental (10.90%, n = 6) forms. The majority of the supernumerary teeth were erupted (56.36%, n = 31). The prevalence of supernumerary teeth in Nepalese children was found to be 1.6%, the most frequent type being mesiodens. Conical morphology was found to be the most common form of supernumerary tooth.

  7. Failed anterior cruciate ligament reconstruction: analysis of factors leading to instability after primary surgery

    Institute of Scientific and Technical Information of China (English)

    MA Yong; AO Ying-fang; YU Jia-kuo; DAI Ling-hui; SHAO Zhen-xing

    2013-01-01

    Background Revision anterior cruciate ligament (ACL) surgery can be expected to become more common as the number of primary reconstruction keeps increasing.This study aims to investigate the factors causing instability after primary ACL reconstruction,which may provide an essential scientific base to prevent surgical failure.Methods One hundred and ten revision ACL surgeries were performed at our institute between November 2001 and July 2012.There were 74 men and 36 women,and the mean age at the time of revision was 27.6 years (range 16-56 years).The factors leading to instability after primary ACL reconstruction were retrospectively reviewed.Results Fifty-one knees failed because of bone tunnel malposition,with too anterior femoral tunnels (20 knees),posterior wall blowout (1 knee),vertical femoral tunnels (7 knees),too posterior tibial tunnels (12 knees),and too anterior tibial tunnels (10 knees).There was another knee performed with open surgery,where the femoral tunnel was drilled through the medial condyle and the tibial tunnel was too anterior.Five knees were found with malposition of the fixation.One knee with allograft was suspected of rejection and a second surgery had been made to take out the graft.Three knees met recurrent instability after postoperative infection.The other factors included traumatic (48 knees) and unidentified (12 knees).Conclusion Technical errors were the main factors leading to instability after primary ACL reconstructions,while attention should also be paid to the risk factors of re-injury and failure of graft incorporation.

  8. Surgical management of multiple supernumerary teeth and an impacted maxillary permanent central incisor.

    Science.gov (United States)

    Rallan, Mandeep; Rallan, Neelakshi Singh; Goswami, Mousumi; Rawat, Kamini

    2013-05-22

    Hyperdontia is the condition of having supernumerary teeth, or teeth which appear in addition to the regular number of teeth. It is a developmental anomaly and has been argued to arise from multiple aetiologies. The most common site is the maxillary incisor region; but the prevalence of more than three teeth supernumerary tooth is less than 1%. A case of 13 year male patient is reported with a multiple impacted supernumerary tooth in maxillary anterior region hindering the eruption of right permanent central incisor. The supernumerary tooth was treated via surgical approach followed by an interim prosthesis for permanent central incisor which later on erupted in due course of time. Background Supernumerary teeth may be defined as any teeth or tooth substance in excess of the usual configuration of 20 deciduous and 32 permanent teeth. The presence of supernumerary teeth in the premaxillary region often poses unique diagnostic and managerial concerns for the practitioner. Rarely is the surplus number compensated by an absence or deficiency of other teeth. Therefore, the dysfunctional nature of supernumerary teeth and their ability to create a variety of pathological disturbances in the normal eruption and position of adjacent teeth warrants their early detection and prudent management. Approximately 76-86% of cases represent single-tooth hyperdontia, with two supernumerary teeth noted in 12-23% and three or more extra teeth noted in less than 1% of cases. Multiple supernumerary teeth are also associated with many syndromes like cleidocranial dysplasia and Gardner’s syndrome etc. However, it is rare to find multiple supernumeraries in individuals with no other associated disease or syndrome. In such cases, the maxillary anterior region is the common site of occurrence. The exact aetiology is not clearly understood. The supernumerary teeth result from any disturbance in the initiation and proliferation stages of odontogenesis. There are several theories regarding the

  9. Crown lengthening in the maxillary anterior region: a 6-month prospective clinical study.

    Science.gov (United States)

    Deas, David E; Mackey, Scott A; Sagun, Ruben S; Hancock, Raymond H; Gruwell, Scott F; Campbell, Casey M

    2014-01-01

    The purpose of this study was to assess osseous parameters and stability of maxillary anterior teeth following crown lengthening surgery. Thirty-six patients requiring facial crown lengthening of 277 maxillary anterior and first premolar teeth were included. Presurgical and intraoperative clinical measurements were recorded at baseline and 1, 3, and 6 months postsurgery at midfacial, mesiofacial, and distofacial line angles. The data presented here suggest that when crown lengthening anterior maxillary teeth, the distance between the desired gingival margin and alveolar crest is usually insufficient to allow for biologic width. In addition, there is significant tissue rebound that may stabilize by 6 months. Tissue rebound appears related to flap position relative to the alveolar crest at suturing. These findings suggest that clinicians should establish proper anterior crown length with osseous resection.

  10. A case of congenital absence of numerous primary teeth treated with a denture for deciduous teeth

    OpenAIRE

    向井, 綾子; MUKAI, AYAKO

    2015-01-01

    Anomalies of the number of teeth include anodontia. The congenital absence of all teeth is called complete anodontia, and that of several teeth is called partial anodontia. Agenesis of numerous teeth causes a decrease in mastication and esthetic problems, and its treatment is often difficult.In the present paper, we report the case of a partial anodontia patient congenitally missing 6 primary teeth and some permanent teeth. The patient was treated using a denture for deciduous teeth to improv...

  11. Nipple-Areola Complex Malposition in Nipple-Sparing Mastectomy: A Review of Risk Factors and Corrective Techniques from Greater than 1000 Reconstructions.

    Science.gov (United States)

    Choi, Mihye; Frey, Jordan D; Salibian, Ara A; Karp, Nolan S

    2017-08-01

    Nipple-areola complex malposition after nipple-sparing mastectomy can be a challenging issue to correct. The current literature is largely limited to smaller series and implant-based reconstructions. A retrospective review of all nipple-sparing mastectomies from 2006 to 2016 at a single institution was performed. Incidence, risk factors, and corrective techniques of nipple-areola complex malposition were analyzed. One thousand thirty-seven cases of nipple-sparing mastectomy were identified, of which 77 (7.4 percent) underwent nipple-areola complex repositioning. All were performed in a delayed fashion. The most common techniques included crescentic periareolar excision [n = 25 (32.5 percent)] and directional skin excision [n = 10 (13.0 percent)]. Cases requiring nipple-areola complex repositioning were significantly more likely to have preoperative radiation therapy (p = 0.0008), a vertical or Wise pattern incision (p = 0.0157), autologous reconstruction (p = 0.0219), and minor mastectomy flap necrosis (p = 0.0462). Previous radiation therapy (OR, 3.6827; p = 0.0028), vertical radial mastectomy incisions (OR, 1.8218; p = 0.0202), and autologous reconstruction (OR, 1.77; p = 0.0053) were positive independent predictors of nipple-areola complex repositioning, whereas implant-based reconstruction (OR, 0.5552; p < 0.0001) was a negative independent predictor of repositioning. Body mass index (p = 0.7104) and adjuvant radiation therapy (p = 0.9536), among other variables, were not predictors of nipple-areola complex repositioning. Nipple-areola complex malposition after nipple-sparing mastectomy can be successfully corrected with various techniques. Previous radiation therapy, vertical mastectomy incisions, and autologous reconstruction are independently predictive of nipple-areola complex malposition. Therapeutic, III.

  12. 整脊治疗骶髂关节损伤与错位误诊案例%A MISDIAGNOSED CASE OF SACROILIAC JOINT INJURY AND MALPOSITION

    Institute of Scientific and Technical Information of China (English)

    魏小明; 李红莲

    2008-01-01

    @@ Sacroiliac joint malposition is one of the main causes evoking lumbocrural pain. Because its clinical symptoms are similar to those induced either by lumbar intervertebral disc protrusion or by ankylosing spondylitis (AS) at the early stage, and because X-ray results taken at its early stage were not evident for differentiating the diseases, misdiagnosis may occur in some doctors due to lack of experience. The authors treated several cases of pain in hip joint, which had been diagnosed as ankylosing spondylitis.

  13. Color differences between artificial and natural teeth in removable partial denture wearers.

    Science.gov (United States)

    Ueda, Takayuki; Takagi, Ichiro; Ueda-Kodaira, Yorika; Sugiyama, Tetsuya; Hirose, Naoki; Ogami, Koichiro; Mori, Kazunari; Sakurai, Kaoru

    2010-01-01

    The purpose of this study was to investigate differences between natural tooth color and that selected for artificial teeth in partial dentures at our department with a view to establishing criteria for obtaining greater harmonization between colors. The participants in this study comprised partial denture wearers visiting the Department of Prosthodontics, Tokyo Dental College Chiba Hospital, in whom both artificial teeth and natural teeth were present in the maxillary anterior tooth area. Natural tooth color was measured according to VITA classical shade guide number using a dental color measurement apparatus. Artificial tooth color in partial dentures produced at our department was investigated by referring to medical records. Color of 28 participants' natural teeth and 345 participants' artificial teeth was investigated. Differences in color distribution between the natural and artificial tooth were analyzed using the Fisher exact test. The most frequent color of natural tooth was C-type, accounting for 39%, followed by D- at 32%, A-at 22% and B-type at 7%. In terms of artificial tooth color, A-type was the most common (97%). The color distribution of natural teeth differed significantly from that of artificial teeth in partial dentures. These results suggest that artificial tooth color did not harmonize with the color of the natural teeth in partial denture wearers.

  14. Prevalence rate of supernumerary teeth among non-syndromic South Indian population: An analysis

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    M Nazargi Mahabob

    2012-01-01

    Full Text Available Aim: Supernumerary teeth are considered as one of the most significant dental anomalies during the primary and early mixed dentition stage. The main objective of the study was to determine the prevalence rate of supernumerary teeth in the patients who reported to the Department of Oral Medicine and Radiology and to study the associated clinical complications. Materials and Methods: A longitudinal observational study was conducted of 2216 patients for a period of 4 months with the documentation of demographic data, the presence of supernumerary teeth, their location, and associated complications such as mechanical trauma, dental caries, and associated pathology. Results: The study recorded 27 supernumerary teeth from the examined 2216 patients. This yields a prevalence of 1.2%, with greater frequency in males which was 1.49% and in females the frequency was 0.85%. The greatest proportion of supernumerary teeth was found in the maxillary anterior region (77.8%. Out of this, 85.7% were classified as mesiodens based on their location. The displacement of adjacent teeth was the most common finding, followed by dental caries. Conclusion: The prevalence of supernumerary teeth in this study was 1.2% which is in agreement with that reported in similar studies and the maxillary mesiodens was the most common location. Displacement of adjacent teeth was the most common finding.

  15. Prevalence and characteristics of supernumerary teeth in a non-syndromic South Indian pediatric population

    Directory of Open Access Journals (Sweden)

    Rajesh T Anegundi

    2014-01-01

    Full Text Available Background: Supernumerary teeth are one of the most widely reported and significant anomaly in patients affecting the primary and early mixed dentition. Aim: To describe the distribution and characteristics of the supernumerary teeth in South Indian population of paediatric patients. Design: In a 12 year retrospective study, a total of 63,569 patients up to the age of 14 years who visited our department between June 2003 and May 2013 were revised.790 cases of supernumerary teeth were found. Patients were evaluated for age, sex, site, status of dentition, number, position, orientation and type of supernumerary teeth. Statistical analysis was carried out using chi square test. Results: 790 subjects with supernumerary teeth (481 males and 309 females were detected, revealing male-female ratio of 1.55:1.The most common supernumerary teeth were mesiodens (82.28%, the most common site was the anterior maxilla (92.53%region. Majority of patients had a single erupted supernumerary oriented straight in the arch. Patients in mixed dentition stage reported with maximum number of supernumerary teeth. Conclusions: The prevalence of supernumerary teeth in non syndromicSouth Indian paediatric population is 1.24% with slight male predilection and conical mesiodens being the commonest.

  16. Prevalence and characteristics of supernumerary teeth in a non-syndromic South Indian pediatric population.

    Science.gov (United States)

    Anegundi, Rajesh T; Tegginmani, Veeresh S; Battepati, Prashant; Tavargeri, Anand; Patil, Shruthi; Trasad, Vijay; Jain, Garima

    2014-01-01

    Supernumerary teeth are one of the most widely reported and significant anomaly in patients affecting the primary and early mixed dentition. To describe the distribution and characteristics of the supernumerary teeth in South Indian population of paediatric patients. In a 12 year retrospective study, a total of 63,569 patients up to the age of 14 years who visited our department between June 2003 and May 2013 were revised.790 cases of supernumerary teeth were found. Patients were evaluated for age, sex, site, status of dentition, number, position, orientation and type of supernumerary teeth. Statistical analysis was carried out using chi square test. 790 subjects with supernumerary teeth (481 males and 309 females) were detected, revealing male-female ratio of 1.55:1.The most common supernumerary teeth were mesiodens (82.28%), the most common site was the anterior maxilla (92.53%)region. Majority of patients had a single erupted supernumerary oriented straight in the arch. Patients in mixed dentition stage reported with maximum number of supernumerary teeth. The prevalence of supernumerary teeth in non syndromic South Indian paediatric population is 1.24% with slight male predilection and conical mesiodens being the commonest.

  17. Prevalence rate of supernumerary teeth among non-syndromic South Indian population: An analysis.

    Science.gov (United States)

    Mahabob, M Nazargi; Anbuselvan, G J; Kumar, B Senthil; Raja, S; Kothari, Sucitha

    2012-08-01

    Supernumerary teeth are considered as one of the most significant dental anomalies during the primary and early mixed dentition stage. The main objective of the study was to determine the prevalence rate of supernumerary teeth in the patients who reported to the Department of Oral Medicine and Radiology and to study the associated clinical complications. A longitudinal observational study was conducted of 2216 patients for a period of 4 months with the documentation of demographic data, the presence of supernumerary teeth, their location, and associated complications such as mechanical trauma, dental caries, and associated pathology. The study recorded 27 supernumerary teeth from the examined 2216 patients. This yields a prevalence of 1.2%, with greater frequency in males which was 1.49% and in females the frequency was 0.85%. The greatest proportion of supernumerary teeth was found in the maxillary anterior region (77.8%). Out of this, 85.7% were classified as mesiodens based on their location. The displacement of adjacent teeth was the most common finding, followed by dental caries. The prevalence of supernumerary teeth in this study was 1.2% which is in agreement with that reported in similar studies and the maxillary mesiodens was the most common location. Displacement of adjacent teeth was the most common finding.

  18. Clinical survey on type of restoration in deciduous teeth.

    Science.gov (United States)

    Fukuyama, Tatsuro; Oda, Shinya; Yamashita, Haruto; Sekiguchi, Hiroshi; Yakushiji, Masashi

    2008-02-01

    This study was conducted in 533 children with 1,634 treated teeth who visited the Pediatric Dentistry Department at the Chiba Hospital of Tokyo Dental College between January and December, 2003. Restorations on deciduous tooth were categorized by age of patient and tooth type. The following observations were made: Children aged 4 (17.9%) visited the clinic most frequently and this group had the highest number of deciduous restorations (21.3%). Among the 1,634 deciduous teeth restored, metal inlays were provided in 29.4% of total teeth restored, composite resin restorations in 27.2%, stainless-steel crowns in 25.7%, composite resin full crowns in 7.7%, glass-ionomer cement restorations in 6.6%, and amalgam restorations in 3.4%. By age, composite resin was most frequently used in children aged 1 to 3. In children aged 5 to 9, metal inlay was most frequently used. Those aged 4 received mostly stainless-steel crowns. Composite resin restorations were used mostly in anterior deciduous teeth, and metal inlays mostly in deciduous molars. Previous research indicated an increasing trend towards composite resin restorations and composite resin full crowns. The present study also confirmed such a trend. While the use of metal inlays and stainless-steel crowns tended to increase until 1987, the present study indicated a trend to decrease.

  19. 微螺钉结合片段弓技术内收上前牙的临床研究%Micro-screw with Segmental Arch Technique for En-masse Retraction of Maxillary Anterior Teeth:A Clinical Cephalometric Study

    Institute of Scientific and Technical Information of China (English)

    张燕琴; 林新平

    2013-01-01

    目的:评估微螺钉结合片段弓技术内收上前牙对上切牙垂直向和转矩控制的效果.方法:选取16例上颌前突患者分为实验组(微螺钉结合片段弓技术)和对照组(微螺钉全牙弓).测量治疗前后的X线头颅定位侧位片相关指标,使用SPSS17.0软件分析.结果:实验组上切牙切缘至RL(通过翼上颌裂点作腭平面的垂线)距离U1E-RL减小7.26 mm,阻抗中心至RL距离U1CR-RL减小3.72 mm,根尖至RL距离U1AP-RL减小1.23 mm,切缘至腭平面的距离U1E-PP增加0.49 mm,阻抗中心至腭平面的距离U1CR-PP减小0.19 mm,根尖至腭平面的距离U1AP-PP减小0.25 mm,上切牙长轴与腭平面交角U1-PP减小11.65°;对照组U1E-RL减小6.18mm,U1CR-RL减小2.94 mm,减小U1AP-RL 0.47 mm,U1E-PP增加0.53 mm,U1CR-PP增加0.27 mm,U1 AP-PP增加0.28 mm,U1-PP减小16.31°.结论:微螺钉结合片段弓技术内收上前牙对上切牙的转矩和垂直向控制较好.%Objective:To evaluate the efficiency of micro-screw with segmental arch technique for en-masse retraction of maxillary anterior teeth.Methods:Sixteen subjects with upper dental alveolar bone protrusion were selected for this study.They were divided into two groups:experimental group (micros-crew with sectional arch technique) and control group (micro-screw with the whole arch).Torque and vertical of the central incisor were evaluated cephalometrically before and after orthodontic retraction.All data were analyzed by SPSS17.0 software.Results:Experimental group:U1E-RL was decreased by 7.26mm,U1CR-RL was decreased by 3.72mm,U1AP -RL was decreased by 1.23mm,U1E-PP was increased by 0.49mm,U1CR-PP was decreased by 0.19mm,U1AP-PP was decreased by 0.25mm,U1-PP was decreased by 11.65°; control group:U1E-RL was decreased by 6.18mm,U1CR-RL was decreased by 2.94mm,U1AP-RL was decreased by 0.47mm,U1E-PP was increased by 0.53mm,U1CR-PP was increased by 0.27mm,U1AP-PP was increased by 0.28mm,U1-PP was decreased by 16.31

  20. The value of the Gothic arch tracing in the positioning of denture teeth.

    Science.gov (United States)

    el-Gheriani, A S; Winstanley, R B

    1988-07-01

    Twenty-five subjects of three nationalities carried out Gothic arch tracings. Measurements between the side arms were compared with the upper intercuspid distances measured in the same subjects. A relationship was found which may be of value in the setting up of anterior maxillary denture teeth.

  1. On the meaning of movable attachment of the incisiviform teeth in Ruminantia

    NARCIS (Netherlands)

    Bemmel, van A.C.V.

    1952-01-01

    In Ruminantia, the roots of the incisiviform teeth in the lower jaw are only partially enclosed in the bony alveolus. Only the lingual part of the alveolus continues in oral direction, the labial part being open at the anterior side, and occupied by fibrous tissue, which is elastic and compact. One

  2. On the meaning of movable attachment of the incisiviform teeth in Ruminantia

    NARCIS (Netherlands)

    Bemmel, van A.C.V.

    1952-01-01

    In Ruminantia, the roots of the incisiviform teeth in the lower jaw are only partially enclosed in the bony alveolus. Only the lingual part of the alveolus continues in oral direction, the labial part being open at the anterior side, and occupied by fibrous tissue, which is elastic and compact. One

  3. INVESTIGATION OF IMPACTED SUPERNUMERARY TEETH: A CONE BEAM COMPUTED TOMOGRAPH (CBCT STUDY

    Directory of Open Access Journals (Sweden)

    Gökhan GÜRLER

    2017-10-01

    Full Text Available Purpose: The purpose of this study was to investigate the impacted supernumerary teeth which were initially detected on panoramic radiographs by using cone beam computed tomography (CBCT. Materials and Methods: In this retrospective study, supernumerary teeth diagnosed on panoramic radiographs taken from patients who had admitted for routine dental treatment were evaluated using CBCT. Patients’ age, gender, systemic conditions as well as number of supernumerary teeth, unilateral-bilateral presence, anatomical localization (maxilla, mandible, anterior-premolar-molar, mesiodens-lateral-canine, parapremolar-paramolar-distomolar shape (rudimentary, supplemental, tuberculate, odontoma, position (palatal-lingual-buccal-labial-central, shortest distance between the tooth and adjacent cortical plate, complications and treatment were assessed. Results: A total of 47 impacted supernumerary teeth in 34 patients were investigated in this study. Of these, 33 (70.2% were unilateral and 14 (29.8% were bilateral. Only 1 supernumerary tooth was found in 27 patients (79.4% whereas 7 patients (20.6% had 2 or more supernumerary teeth. Most of the teeth located in the anterior region (74.4% of the jaws and maxilla (74.4%. Twenty teeth (42.5% were mesiodens, 11 (23.4% were lateral or canine, 14 (29.7% were parapremolar and 2(4.4% were distomolar. Twenty-seven teeth (57.4% were rudimentary, 15 (31.9% were supplemental and 5 (10.7% were odontoma in shape. The shortest distance between the supernumerary tooth and adjacent cortical plate varied between 0 to 2.5 mm with a mean of 0.66 mm. The most common clinical complaint was the non-eruption of permanent teeth (42.5%. All supernumerary teeth were removed under local anesthesia. Orthodontic traction was performed for those impacted permanent teeth if necessary. Conclusion: Impacted supernumerary teeth are usually in close proximity to cortical bone. Although this may facilitate surgical access, there is a risk of

  4. Bayes reconstruction of missing teeth

    DEFF Research Database (Denmark)

    Sporring, Jon; Jensen, Katrine Hommelhoff

    2008-01-01

     We propose a method for restoring the surface of tooth crowns in a 3D model of a human denture, so that the pose and anatomical features of the tooth will work well for chewing. This is achieved by including information about the position and anatomy of the other teeth in the mouth. Our system...... contains two major parts: A statistical model of a selection of tooth shapes and a reconstruction of missing data. We use a training set consisting of 3D scans of dental cast models obtained with a laser scanner, and we have build a model of the shape variability of the teeth, their neighbors...... regularization of the log-likelihood estimate based on differential geometrical properties of teeth surfaces, and we show general conditions under which this may be considered a Bayes prior.Finally we use Bayes method to propose the reconstruction of missing data, for e.g. finding the most probable shape...

  5. Class I malocclusion with anterior crossbite and severe crowding

    Directory of Open Access Journals (Sweden)

    Daltro Enéas Ritter

    2014-04-01

    Full Text Available This article reports the orthodontic diagnosis and treatment planning carried out with a 14-year and 5-month-old female patient with esthetic and functional complaints. She presented an Angle Class I malocclusion, anterior crossbite and severe crowding in both maxillary and mandibular arches, in addition to a lightly concave straight facial profile. Orthodontic treatment did not require extraction. Crossbite was corrected by protrusion of upper teeth, which contributed to alignment and leveling of teeth, in addition to improving the patient's facial profile. The case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as a requirement for the BBO certification.

  6. Endodontic management of taurodontic teeth

    Directory of Open Access Journals (Sweden)

    Prakash R

    2005-01-01

    Full Text Available Taurodontism is a morpho-anatomical change in the shape of the tooth in which the body of the tooth is enlarged and the roots are reduced in size. Although taurodontism is a dental rarity, this unusual radicular form should merit circumspect considerations in planning and treatment. Endodontic management in taurodont teeth has been described as complex and difficult. The present paper describes the successful completion of endodontic treatment in three taurodontic teeth with appropriate use of instruments and techniques and also emphasizes the need for post endodontic rehabilitation.

  7. Angle Class II malocclusion treated with extraction of permanent teeth.

    Science.gov (United States)

    Barreto, Gustavo Mattos

    2013-01-01

    Angle Class II malocclusion associated with anterior open bite in adult patients demands a carefully elaborated orthodontic planning, aiming at restoring not only harmonious dental and facial esthetics, but also a balanced masticatory function. Orthognathic surgery or permanent teeth extraction are often the choice of treatment, therefore, treatment decision is related to all dental, skeletal and functional aspects. The present report discusses orthodontic compensation carried out by means of upper premolar extraction performed to correct the Class II canine relationship and, consequently, the anterior open bite, accepting that the upper incisors be retroclined. This clinical case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO) as part of the requirements for obtaining the BBO Certification.

  8. Angle Class II malocclusion treated with extraction of permanent teeth

    Directory of Open Access Journals (Sweden)

    Gustavo Mattos Barreto

    2013-08-01

    Full Text Available Angle Class II malocclusion associated with anterior open bite in adult patients demands a carefully elaborated orthodontic planning, aiming at restoring not only harmonious dental and facial esthetics, but also a balanced masticatory function. Orthognathic surgery or permanent teeth extraction are often the choice of treatment, therefore, treatment decision is related to all dental, skeletal and functional aspects. The present report discusses orthodontic compensation carried out by means of upper premolar extraction performed to correct the Class II canine relationship and, consequently, the anterior open bite, accepting that the upper incisors be retroclined. This clinical case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO as part of the requirements for obtaining the BBO Certification.

  9. Influence of the sagittal balance of the spine on the anterior pelvic plane and on the acetabular orientation.

    Science.gov (United States)

    Legaye, Jean

    2009-12-01

    The Anterior Pelvic Plane (APP), defined by the anterior superior iliac spines and the pubic tubercle, was commonly used as reference for positioning and postoperative evaluation of the orientation of the acetabular cup in total hip arthroplasty. APP was assumed to be vertical, but was not observed always so, mostly because of associated spinal diseases inducing perturbations in the harmony of the sagittal balance of the pelvi-spinal unit. Consequently a sagittal rotation of the pelvis occurs, and so a tilt of the APP which alters directly the orientation of the cup in upright position. An analysis of the APP tilt related to the sagittal balance of the spine was provided and its implication on the cup orientation. It appeared essential for an individual adjustment of the cup positioning to avoid a functional mal-position which can lead to an increased risk of dislocation and impingement.

  10. Case study: limitations of panoramic radiography in the anterior mandible.

    LENUS (Irish Health Repository)

    Walker, Cameron

    2009-12-01

    Dental Panoramic Tomography (DPT) is a widely used and valuable examination in dentistry. One area prone to artefacts and therefore misinterpretation is the anterior region of the mandible. This case study discusses a periapical radiolucency related to lower anterior teeth that is discovered to be a radiographic artefact. Possible causes of the artefact include a pronounced depression in the mental region of the mandible or superimposition of intervertebral spaces. Additional limitations of the DPT image include superimposition of radio-opaque structures, reduced image detail compared to intra-oral views and uneven magnification. These problems often make the DPT inappropriate for imaging the anterior mandible. Clinical Relevance: Panoramic radiography is often unsuitable for radiographic examination of the anterior mandible.

  11. Esthetic Challenges in Rehabilitating the Anterior Maxilla: A Case Report.

    Science.gov (United States)

    Miranda, M E; Olivieri, K A; Rigolin, F J F; de Vasconcellos, A A

    2016-01-01

    The rehabilitation of an unesthetic smile in the anterior maxilla is always a clinical challenge, especially when an improper shape and size, old restorations, and unesthetic shading are present. In addition, an irregular gingival zenith contour in the anterior maxilla can affect the smile's harmony. Thus, detailed treatment planning is needed to define a functional and esthetic prosthetic rehabilitation. This study describes a clinical case in which a 55-year-old woman was rehabilitated using Digital Smile Design planning and full ceramic crowns (metal free) in the anterior zone of the maxilla and mandible. To normalize the gingival zenith, a dynamic compression technique was performed using provisional restorations to condition the gingival tissues and harmonize the proportional length of the anterior upper teeth.

  12. CONGENITAL ANTERIOR TIBIOFEMURAL SUBLUXATION

    Directory of Open Access Journals (Sweden)

    A. Shahla

    2008-06-01

    Full Text Available Congenital anterior tibiofemoral subluxation is an extremely rare disorder. All reported cases accompanied by other abnormalities and syndromes. A 16-year-old high school girl referred to us with bilateral anterior tibiofemoral subluxation as the knees were extended and reduced at more than 30 degrees flexion. Deformities were due to tightness of the iliotibial band and biceps femuris muscles and corrected by surgical release. Associated disorders included bilateral anterior shoulders dislocation, short metacarpals and metatarsals, and right calcaneuvalgus deformity.

  13. Surgical management of impacted incisors in associate with supernumerary teeth: A combine case report of spontaneous eruption and orthodontic extrusion

    Directory of Open Access Journals (Sweden)

    D Das

    2012-01-01

    Full Text Available Maxillary permanent incisors impaction is not a frequent case in dental practice, but its treatment is challenging because of its importance to facial esthetics. Supernumerary teeth are the main cause of impaction of upper incisors. Supernumerary teeth when present can cause both esthetic and pathologic problems. Early detection of such teeth is most important if complications are to be avoided. In this reported case, the orthopantamogram of a 9-year-old boy revealed two impacted supernumerary teeth in the maxillary anterior region, which was interfering with the eruption of the permanent central incisors. The impacted supernumerary teeth were surgically removed, 11 was repositioned in the arch as it was situated very high in the arch, close to the nasal floor. Twenty-one erupted spontaneously but orthodontic force was applied over 11 to bring it into the occlusion and alignment was achieved with 0.014 mm NiTi wire.

  14. Precision of a novel computed tomographic method for quantification of femoral varus in dogs and an assessment of the effect of femoral malpositioning.

    Science.gov (United States)

    Oxley, Bill; Gemmill, Toby J; Pink, Jonathan; Clarke, Stephen; Parry, Andrew; Baines, Stephen; Malcolm McKee, W

    2013-08-01

    To assess the precision of a novel protocol for determination of femoral varus angle (FVA) using computed tomography (CT) in dogs, and to quantify the effect of femoral rotational and sagittal plane malpositioning on measured FVA. Cross-sectional study. Femora (n = 66) from dogs that had pelvic limb CT examination for patellar instability (26) or other reasons (10). Three observers measured FVA of each of 66 femora on three separate occasions. Standardized orientation of a volume rendered image was achieved by superimposition of the caudal and distal aspects of the femoral condyles on a lateral projection, definition of a sagittal plane axis, and finally rotation through 90° to yield a cranial projection. Intra- and inter-observer variability were estimated using the intra-class correlation coefficient. The effect of variation in rotational and sagittal plane orientation on measured FVA was subsequently quantified using 6 femora with FVAs between -0.4° and 19°. Intra-class correlation coefficients for the 3 observers, indicating intra-observer variation, were 0.982, 0.937, and 0.974. The intra-class correlation coefficient of the means of the results from each observer, indicating inter-observer variation, was 0.976. Consistent linear variations in measured FVA occurred as a result of rotational malpositioning in all 6 tested femora, and as a result of sagittal plane malpositioning in femora with FVAs ≥ 7.9°. The reported protocol for the measurement of FVA in dogs is repeatable and reproducible. Small variations in femoral orientation, as might be expected with conventional radiography, lead to clinically significant alterations in measured FVA. © Copyright 2013 by The American College of Veterinary Surgeons.

  15. Alternativa estética para reconstrução de dentes anteriores fraturados

    Directory of Open Access Journals (Sweden)

    Rachel Marturelli

    2007-01-01

    Full Text Available Anterior teeth fractures are clinical situations that demand scientific knowledge, technicalability and artistic sense for the success of the treatment, which has the adhesive technology asan conservative and fast alternative, with excellent aesthetic results. The purpose of thisclinical report is to describe a reconstruction technique of fractured teeth with endodonticinvolvement, by the use of micron-hybrid composite resin and aesthetic fiber glass post.

  16. "Early baby teeth": Folklore and facts.

    Science.gov (United States)

    Maheswari, N Uma; Kumar, B P; Karunakaran; Kumaran, S Thanga

    2012-08-01

    Variations in the newborns' oral cavity have been an enduring interest to the pediatric dentist. The occurrence of natal and neonatal teeth is a rare anomaly, which for centuries has been associated with diverse superstitions among many different ethnic groups. Natal teeth are more frequent than neonatal teeth, the ratio being approximately 3:1. The purpose of this case report is to review the literature related to the natal teeth folklore and misconceptions and discuss their possible etiology and treatment.

  17. Bayes reconstruction of missing teeth

    DEFF Research Database (Denmark)

    Sporring, Jon; Jensen, Katrine Hommelhoff

    2008-01-01

     We propose a method for restoring the surface of tooth crowns in a 3D model of a human denture, so that the pose and anatomical features of the tooth will work well for chewing. This is achieved by including information about the position and anatomy of the other teeth in the mouth. Our system...... of a missing tooth based on the best match with our shape model on the known data, and we superior improved reconstructions of our full system....

  18. Iron deposition in modern and archaeological teeth

    Energy Technology Data Exchange (ETDEWEB)

    Williams, A.-M.M., E-mail: AnneMarie.Williams@utas.edu.au [School of Medicine, Private Bag 34, University of Tasmania, Hobart 7001 (Australia); Siegele, R. [Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234 (Australia)

    2014-09-15

    Iron surface concentrations and profile maps were measured on the enamel of archaeological and modern teeth to determine how iron is deposited in tooth enamel and if it was affected by the post-mortem environment. Teeth from Australian children who died in the second half of the 19th century were compared with contemporary teeth extracted for orthodontic purposes. Surface analysis of the teeth was performed using the 3 MV Van Der Graff Accelerator at The Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia. A small sample of teeth were then cut in the mid sagittal plane and analysed using ANSTO High Energy Heavy Ion Microprobe. Maps and linear profiles were produced showing the distribution of iron across the enamel. Results show that both the levels and distribution of iron in archaeological teeth is quite different to contemporary teeth, raising the suggestion that iron has been significantly altered by the post-mortem environment.

  19. Iron deposition in modern and archaeological teeth

    Science.gov (United States)

    Williams, A.-M. M.; Siegele, R.

    2014-09-01

    Iron surface concentrations and profile maps were measured on the enamel of archaeological and modern teeth to determine how iron is deposited in tooth enamel and if it was affected by the post-mortem environment. Teeth from Australian children who died in the second half of the 19th century were compared with contemporary teeth extracted for orthodontic purposes. Surface analysis of the teeth was performed using the 3 MV Van Der Graff Accelerator at The Australian Nuclear Science and Technology Organisation (ANSTO), Sydney, Australia. A small sample of teeth were then cut in the mid sagittal plane and analysed using ANSTO High Energy Heavy Ion Microprobe. Maps and linear profiles were produced showing the distribution of iron across the enamel. Results show that both the levels and distribution of iron in archaeological teeth is quite different to contemporary teeth, raising the suggestion that iron has been significantly altered by the post-mortem environment.

  20. Quality of Life Following Early Orthodontic Therapy for Anterior Crossbite: Report of Cases in Twin Boys

    Science.gov (United States)

    Piassi, Eluza; Antunes, Leonardo Santos; Andrade, Marcia Rejane Thomas Canabarro

    2016-01-01

    Anterior crossbite (AC) refers to a condition in which the maxillary anterior teeth are placed lingually in their relationship with the mandibular anterior teeth. This dental condition results in visible incisor differences that are associated with higher levels of dissatisfaction with appearance and have potential to negatively impact on oral health-related quality of life (OHRQoL) of the children. The aim of this paper was to report two cases of interceptive orthodontic treatment of twin children with anterior crossbite and its impact on OHRQoL of these children. Although AC affects negatively psychosocial aspects of OHRQoL of the children, the interceptive orthodontic treatment of children with AC was essential to improve their OHRQoL. PMID:27738533

  1. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst

    Directory of Open Access Journals (Sweden)

    Ritesh R Kalaskar

    2011-01-01

    Full Text Available Supernumerary teeth are the most common developmental dental anomaly resulting from hyperactivity of dental lamina, dichotomy, environmental factor, or polygenetic process of atavism. Supernumerary teeth present classical oral complication such as impaction of adjacent teeth, crowding, diastema formation, rotation, displacement of teeth, and occlusal interference. A dentigerous cyst associated with anterior supernumerary teeth (mesiodens is rare and accounts for 5% of all dentigerous cysts. The present case reports describe the successful management of the impacted permanent maxillary central incisor positioned high in the vestibule. A combination of surgical and orthodontic techniques was employed to improve treatment outcome with greater hard and soft tissue preservation and to prevent psychological problems. In the surgical phase, supernumerary teeth and dentigerous cyst were removed. Subsequently traction was employed by bonding bracket on the labial surface using closed and open eruption techniques. Successively, fixed orthodontic treatment was started to align permanent maxillary central incisors in an occlusal plane. Thus, combination of surgical and orthodontic method can be the treatment of choice over surgical extraction, implant placement, and surgical repositioning.

  2. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst

    Science.gov (United States)

    Kalaskar, Ritesh R.; Kalaskar, Ashita R.

    2011-01-01

    Supernumerary teeth are the most common developmental dental anomaly resulting from hyperactivity of dental lamina, dichotomy, environmental factor, or polygenetic process of atavism. Supernumerary teeth present classical oral complication such as impaction of adjacent teeth, crowding, diastema formation, rotation, displacement of teeth, and occlusal interference. A dentigerous cyst associated with anterior supernumerary teeth (mesiodens) is rare and accounts for 5% of all dentigerous cysts. The present case reports describe the successful management of the impacted permanent maxillary central incisor positioned high in the vestibule. A combination of surgical and orthodontic techniques was employed to improve treatment outcome with greater hard and soft tissue preservation and to prevent psychological problems. In the surgical phase, supernumerary teeth and dentigerous cyst were removed. Subsequently traction was employed by bonding bracket on the labial surface using closed and open eruption techniques. Successively, fixed orthodontic treatment was started to align permanent maxillary central incisors in an occlusal plane. Thus, combination of surgical and orthodontic method can be the treatment of choice over surgical extraction, implant placement, and surgical repositioning. PMID:22114457

  3. Rotational path of insertion for removable partial dentures with an anterior saddle.

    Science.gov (United States)

    Yip, Kevin H-K; Fang, Daniel T-S; Smales, Roger J; Newsome, Philip R H; Chow, Tak W

    2003-01-01

    The provision of removable partial dentures remains a viable treatment modality for many partially dentate patients. Replacing missing anterior teeth with a removable partial denture using a rotational path of insertion provides improved retention and appearance. The use of a rotational path of insertion also provides additional retention for a removable partial denture restoring combined anterior and posterior bounded saddles. Two case reports demonstrate the use of the rotational path of insertion for partial denture design.

  4. Anterior cervical plating

    Directory of Open Access Journals (Sweden)

    Gonugunta V

    2005-01-01

    Full Text Available Although anterior cervical instrumentation was initially used in cervical trauma, because of obvious benefits, indications for its use have been expanded over time to degenerative cases as well as tumor and infection of the cervical spine. Along with a threefold increase in incidence of cervical fusion surgery, implant designs have evolved over the last three decades. Observation of graft subsidence and phenomenon of stress shielding led to the development of the new generation dynamic anterior cervical plating systems. Anterior cervical plating does not conclusively improve clinical outcome of the patients, but certainly enhances the efficacy of autograft and allograft fusion and lessens the rate of pseudoarthrosis and kyphosis after multilevel discectomy and fusions. A review of biomechanics, surgical technique, indications, complications and results of various anterior cervical plating systems is presented here to enable clinicians to select the appropriate construct design.

  5. Comparison of Amount of Primary Tooth Reduction Required for Anterior and Posterior Zirconia and Stainless Steel Crowns.

    Science.gov (United States)

    Clark, Larkin; Wells, Martha H; Harris, Edward F; Lou, Jennifer

    2016-01-01

    To determine if aggressiveness of primary tooth preparation varied among different brands of zirconia and stainless steel (SSC) crowns. One hundred primary typodont teeth were divided into five groups (10 posterior and 10 anterior) and assigned to: Cheng Crowns (CC); EZ Pedo (EZP); Kinder Krowns (KKZ); NuSmile (NSZ); and SSC. Teeth were prepared, and assigned crowns were fitted. Teeth were weighed prior to and after preparation. Weight changes served as a surrogate measure of tooth reduction. Analysis of variance showed a significant difference in tooth reduction among brand/type for both the anterior and posterior. Tukey's honest significant difference test (HSD), when applied to anterior data, revealed that SSCs required significantly less tooth removal compared to the composite of the four zirconia brands, which showed no significant difference among them. Tukey's HSD test, applied to posterior data, revealed that CC required significantly greater removal of crown structure, while EZP, KKZ, and NSZ were statistically equivalent, and SSCs required significantly less removal. Zirconia crowns required more tooth reduction than stainless steel crowns for primary anterior and posterior teeth. Tooth reduction for anterior zirconia crowns was equivalent among brands. For posterior teeth, reduction for three brands (EZ Pedo, Kinder Krowns, NuSmile) did not differ, while Cheng Crowns required more reduction.

  6. Outcomes and stability in patients with anterior open bite and long anterior face height treated with temporary anchorage devices and a maxillary intrusion splint

    Science.gov (United States)

    Scheffler, Nicole R.; Proffit, William R.; Phillips, Ceib

    2015-01-01

    Introduction Temporary skeletal anchorage devices now offer the possibility of closing anterior open bites and decreasing anterior face height by intruding maxillary posterior teeth, but data for treatment outcomes are lacking. This article presents outcomes and posttreatment changes for consecutive patients treated with a standardized technique. Methods The sample included 33 consecutive patients who had intrusion of maxillary posterior teeth with a maxillary occlusal splint and nickel-titanium coil springs to temporary anchorage devices in the zygomatic buttress area, buccal and apical to the maxillary molars. Of this group, 30 had adequate cephalograms available for the period of treatment, 27 had cephalograms including 1-year posttreatment, and 25 had cephalograms from 2 years or longer. Results During splint therapy, the mean molar intrusion was 2.3 mm. The mean decrease in anterior face height was 1.6 mm, less than expected because of a 0.6-mm mean eruption of the mandibular molars. During the postintrusion orthodontics, the mean change in maxillary molar position was a 0.2-mm extrusion, and there was a mean 0.5-mm increase in face height. Positive overbite was maintained in all patients, with a slight elongation (<2 mm) of the incisors contributing to this. During the 1 year of posttreatment retention, the mean changes were a further eruption of 0.5 mm of the maxillary molars, whereas the mandibular molars intruded by 0.6 mm, and there was a small decrease in anterior face height. Changes beyond 1 year posttreatment were small and attributable to growth rather than relapse in tooth positions. Conclusions Intrusion of the maxillary posterior teeth can give satisfactory correction of moderately severe anterior open bites, but 0.5 to 1.5 mm of reeruption of these teeth is likely to occur. Controlling the vertical position of the mandibular molars so that they do not erupt as the maxillary teeth are intruded is important in obtaining a decrease in face height

  7. Early removal of odontoma resulting in spontaneous eruption of the impacted teeth

    Directory of Open Access Journals (Sweden)

    Achmad Harijadi

    2010-06-01

    Full Text Available Background: Compound odontomas in the anterior maxilla during mixed dentition frequently cause obstruction to the eruption pathway of permanent upper anterior teeth. Removal of the odontomas may or may not le