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Sample records for anterior teeth utilizing

  1. Restoring primary anterior teeth.

    Science.gov (United States)

    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.

  2. Restoring primary anterior teeth.

    Science.gov (United States)

    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. PMID:12412967

  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. Restoring primary anterior teeth: updated for 2014.

    Science.gov (United States)

    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. PMID:25905657

  5. Rehablitation of mandibular fracture with anterior teeth loss

    OpenAIRE

    Singh, Meenakshi; Singh, Ajay; Rajpal, Jaisika; K. K. Gupta; Singh, Vibha

    2011-01-01

    We report here on rehabilitating a case with mandibular fracture and lower anterior teeth loss. Three double-staged implants were placed in the lower anterior region; in an attempt to rehabilitate the condition of five missing lower teeth, two natural teeth were prepared to act as natural abutments. Teeth implant-supported prosthesis was fabricated. Patient with a right mandibular fracture and loss of lower anterior missing teeth was successfully rehabilitated with teeth implant-supported pro...

  6. 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.

  7. Anterior Teeth Mutilation and The Occurrence of Posterior Teeth Atrition in Siberut Island

    OpenAIRE

    Isnindiah Koerniati

    2013-01-01

    The Mentawai ethnic group is accustomed to the practice of anterior teeth mutilation on males and females prior to reaching puberty age at Siberut Island, Mentawai Islands Regency, West Sumatra Province. Objective: of this research was to analyze the effects of anterior teeth mutilation on the teeth of the Mentawai ethnic, and prove that there is a correlation between anterior teeth mutilation and posterior teeth attritions. Material & method: There were 179 respondents who contributed to...

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

    Science.gov (United States)

    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.

  9. Intrusion of anterior teeth to improve smile esthetics

    OpenAIRE

    Chandrasekharan, Deepak; Balaji, S. M.

    2010-01-01

    A gummy smile is probably one of the most common causes of an unaesthetic smile. Causes include overeruption of maxillary anterior teeth and maxillary vertical excess. Intrusion of maxillary anterior teeth with Orthodontics and Le forte I superior repositioning may form a part of the solution. Of late the use of micro implants have improved the smile esthetics of borderline surgical cases by allowing the Orthodontist to intrude teeth more than what was possible with conventional Orthodontics.

  10. Concrescent triplets involving primary anterior teeth

    OpenAIRE

    Urvashi Sharma; Anubha Gulati; Namrata C Gill

    2013-01-01

    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 r...

  11. 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.

  12. 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.

  13. Esthetic crown lengthening for maxillary anterior teeth.

    Science.gov (United States)

    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.

  14. Perikymata spacing and distribution on hominid anterior teeth.

    Science.gov (United States)

    Dean, M C; Reid, D J

    2001-11-01

    We documented the spacing and distribution of perikymata on the buccal enamel surface of fossil hominin anterior teeth with reference to a sample of modern human and modern great ape teeth. A sample of 27 anterior teeth attributed to Australopithecus (5 to A. afarensis, 22 to A. africanus) and of 33 attributed to Paranthropus (6 to P. boisei, and 27 to P. robustus) were replicated and sputter-coated with gold to enable reflected light microscopy of their surface topography. Anterior teeth were then divided into 10 equal divisions of buccal crown height. The total perikymata count in each division of crown height was recorded using a binocular microscope fitted with a vernier micrometer eyepiece. Then the mean number of perikymata per millimeter was calculated for each division. Similar comparative data for a modern sample of 115 unworn human anterior teeth and 30 African great ape anterior teeth were collected from ground sections. Perikymata counts in each taxon (together with either known or presumed periodicities of perikymata) were then used to estimate enamel formation times in each division of crown height, for all anterior tooth types combined. The distributions of these estimates of time taken to form each division of crown height follow the same trends as the actual perikymata counts and differ between taxa in the same basic way. The distinction between modern African great apes and fossil hominins is particularly clear. Finally, we calculated crown formation times for each anterior tooth type by summing cuspal and lateral enamel formation times. Estimates of average crown formation times in australopiths are shorter than those calculated for both modern human and African great ape anterior teeth. The data presented here provide a better basis for exploring differences in perikymata spacing and distribution among fossil hominins, and provide the first opportunity to describe four specimens attributed to Homo in this context. Preliminary data indicate that

  15. 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.

  16. 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.

  17. Replacement of missing anterior teeth in a patient with temporomandibular disorder.

    Science.gov (United States)

    Haralur, Satheesh B; Saeed Al-Shahrani, Omar

    2014-01-01

    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. PMID:24715993

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

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    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.

  19. 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.

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

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    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

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

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    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.

  2. 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.

  3. Psychosocial Effects of Fractured Anterior Teeth among Rural Children

    Science.gov (United States)

    Naveen, Mohan; Teja, Ravi; Paulindraraj, Shankar; Vallabhaneni, Sai K; Arumugam, Selva B

    2016-01-01

    ABSTRACT Aim: The aim of the study is to determine how rural children view children with visible incisor fracture. Materials and methods: Class 7 (aged 11-12 years) and class 10 (aged 14-15 years) schoolchildren (the participants) were invited to make a social judgment about the color photograph of two children (the subjects). Participants were randomly allocated either (i) pictures of children without incisor fracture or (ii) pictures of the same children whose photographs had been digitally modified to visible incisor fracture. Using a child-centered questionnaire, participants rated subjects using a four-point Likert scale for three negative and six positive attributes. Total attribute scores were tested for significant differences, according to whether the subject had visible incisor fracture or not, using multivariate analysis of variance (p < 0.05). Results: Both class 7 and 10 children rated subjects with visible incisor fracture more negatively than the subjects without incisor fracture. Female participants of class 10 have rated the male subject with incisor fracture significantly negatively (p < 0.01) than male subject without incisor fracture. How to cite this article: Venkatesan R, Naveen M, Teja R, Paulindraraj S, Vallabhaneni SK, Arumugam SB. Psychosocial Effects of Fractured Anterior Teeth among Rural Children. Int J Clin Pediatr Dent 2016;9(2):128-130. PMID:27365933

  4. 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

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

    OpenAIRE

    Amit Khatri; Nandlal, B

    2010-01-01

    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, conserv...

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

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    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.

  7. Application of cone-beam CT in root morphology observation of human maxillary anterior teeth

    International Nuclear Information System (INIS)

    Objective: To detect the root curvature and diameter in human maxillary anterior teeth by cone-beam computed tomography (CBCT) and to provide some anatomical parameters related to post-core design. Methods: A total of 129 human maxillary anterior teeth were selected and analyzed. The three-dimensional images of these teeth were obtained by multiplanar reconstructions (MPR) technique of CBCT, and the root curvature and diameter were observed and measured by dedicated software. Results: The mean labio-lingual root curvature degree of maxillary central incisors was significantly smaller than those of maxillary lateral incisors and canines (χ2=6.592, P=0.037), while the labio-lingual root curvature radius was significantly larger than those of other groups (χ2=8.504, P=0.014). There were significant differences in the root length distribution of the mesio-distal curved part between the three different maxillary anterior teeth groups (χ2=13.910, P=0.008). The mean diameter measured labio-lingually was significantly different from that measured mesiodistally in various groups (P=0.000). Conclusion: There are differences in root morphology of 129 human maxillary anterior teeth, and the root curvatures and diameters of human maxillary anterior teeth present differently in CBCT. (authors)

  8. Accessory roots and root canals in human anterior teeth: a review and clinical considerations.

    Science.gov (United States)

    Ahmed, H M A; Hashem, A A

    2016-08-01

    Anterior teeth may have aberrant anatomical variations in the number of roots and root canals. A review of the literature was conducted using appropriate key words in major endodontic journals to identify the available reported cases as well as experimental and clinical investigations on accessory roots and root canals in anterior teeth. After retrieving the full text of related articles, cross-citations were identified, and the pooled data were then discussed. Results revealed a higher prevalence in accessory root/root canal variations in mandibular anterior teeth than in maxillary counterparts. However, maxillary incisor teeth revealed the highest tendency for accessory root/root canal aberrations caused by anomalies such as dens invaginatus and palato-gingival groove. Primary anterior teeth may also exhibit external and internal anatomical variations in the root, especially maxillary canines. Therefore, dental practitioners should thoroughly assess all teeth scheduled for root canal treatment to prevent the undesirable consequences caused by inadequate debridement of accessory configurations of the root canal system. PMID:26174943

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

    OpenAIRE

    Lozano Ruiz, Marina; Bermúdez de Castro, José María; Carbonell i Roura, Eudald; Arsuaga, Juan Luis

    2008-01-01

    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 extramasticatory 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 microsco...

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

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    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.

  11. 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.

  12. 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.

  13. 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.

  14. Recurrent unicystic ameloblastoma in mandibular anterior teeth area

    International Nuclear Information System (INIS)

    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.

  15. 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

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

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    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

  17. 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.

  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. PMID:18617220

  19. 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

  20. 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.

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

    OpenAIRE

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

    2013-01-01

    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 go...

  2. 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.

  3. Resin-Bonded Fiber-Reinforced Composite for Direct Replacement of Missing Anterior Teeth: A Clinical Report

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    Sufyan Garoushi

    2011-01-01

    Full Text Available Missing anterior teeth is of serious concern in the social life of a patient in most of societies. While conventional fixed partial dentures and implant-supported restorations may often be the treatment of choice, fiber-reinforced composite (FRC resins offer a conservative, fast, and cost-effective alternative for single and multiple teeth replacement. This paper presents two cases where FRC technology was successfully used to restore anterior edentulous areas in terms of esthetic values and functionality.

  4. 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. PMID:19272811

  5. Fiber-reinforced Composite for Chairside Replacement of Anterior Teeth: A Case Report.

    Science.gov (United States)

    Garoushi, S; Vallittu, Pk; Lassila, Lvj

    2008-01-01

    A variety of therapeutic modalities, from implant to conventional Maryland prosthesis, can be used for the replacement of a missing anterior tooth. Whenever a minimal tooth reduction is preferred, a fiber reinforced composite (FRC) prosthesis could be a good alternative to conventional prosthetic techniques, chiefly as temporary restoration before making a final decision on the treatment. The purpose of this case report is to describe the clinical procedure of fabricating anterior chairside FRC prosthesis with pre-impregnated unidirectional E-glass fibers and veneered particulate filler composite. Fiber-reinforced composite in combination with adhesive technology appears to be a promising treatment option for replacing missing teeth. However, further and long-term clinical investigation will be required to provide additional information on the survival of directly-bonded anterior fixed prosthesis made with FRC systems. PMID:21499473

  6. Fiber-reinforced Composite for Chairside Replacement of Anterior Teeth: A Case Report

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    Garoushi S

    2008-01-01

    Full Text Available the replacement of a missing anterior tooth. Whenever a minimal tooth reduction is preferred, a fiber reinforced composite (FRC prosthesis could be a good alternative to conventional prosthetic techniques, chiefly as temporary restoration before making a final decision on the treatment. The purpose of this case report is to describe the clinical procedure of fabricating anterior chairside FRC prosthesis with pre-impregnated unidirectional E-glass fibers and veneered particulate filler composite. Fiber-reinforced composite in combination with adhesive technology appears to be a promising treatment option for replacing missing teeth. However, further and long-term clinical investigation will be required to provide additional information on the survival of directly-bonded anterior fixed prosthesis made with FRC systems.

  7. 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.

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

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    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

  9. 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.

  10. 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.

  11. 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.

  12. 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.

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

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    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.

  14. 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.

  15. 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.

  16. Fracture resistance of endodontically treated permanent anterior teeth restored with three different esthetic post systems: An in vitro study

    OpenAIRE

    Ameet J Kurthukoti; Jaya Paul; Kapil Gandhi; Divya B J Rao

    2015-01-01

    Background: Esthetic coronal reconstruction of fractured anterior teeth is often performed using intra radicular posts. Most of the commonly used commercially esthetic post systems do not exhibit similar physical properties as dentin resulting in failures. Aim: To evaluate and compare the fracture resistance and mode of failure of simulated traumatized permanent central incisors restored with three different post systems including biologic dentin posts. Materials and Methods: A total of 40 re...

  17. 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 < 0.01). Falls and 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

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

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    Ain

    2016-01-01

    Full Text Available 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 < 0.01. Falls and 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

  19. 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

  20. 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.

  1. 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.

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

    OpenAIRE

    Nanik Zubaidah

    2012-01-01

    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 expo...

  3. 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.

  4. 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.

  5. Treatment of anterior open bite and multiple missing teeth with lingual fixed appliances, double jaw surgery, and dental implants.

    Science.gov (United States)

    Jung, Min-Ho; Baik, Un-Bong; Ahn, Sug-Joon

    2013-04-01

    The treatment of adult patients with severe anterior open bite frequently requires orthognathic surgery, especially when the chin is retruded severely. If a patient has multiple missing posterior teeth, it is difficult to control the occlusal plane because it is challenging to obtain anchorage during orthodontic treatment. We report on a 25-year-old woman who had a skeletal Class II malocclusion, severe anterior open bite, vertical maxillary asymmetry, and severe dental caries on her molars. There was no posterior occlusal contact between the maxillary and mandibular molars since 5 of her molars had to be extracted because of severe caries. Lingual fixed appliances and double jaw surgery were performed to treat her skeletal and dental problems, and dental implants helped restore her masticatory function. Pretreatment, posttreatment, and retention photographs demonstrate effective, esthetically pleasing, and stable treatment results. PMID:23540629

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

    Directory of Open Access Journals (Sweden)

    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.

  7. Fiber-reinforced Composite for Chairside Replacement of Anterior Teeth: A Case Report

    OpenAIRE

    S, Garoushi; Vallittu PK; Lassila LVJ

    2008-01-01

    A variety of therapeutic modalities, from implant to conventional Maryland prosthesis, can be used for the replacement of a missing anterior tooth. Whenever a minimal tooth reduction is preferred, a fiber reinforced composite (FRC) prosthesis could be a good alternative to conventional prosthetic techniques, chiefly as temporary restoration before making a final decision on the treatment. The purpose of this case report is to describe the clinical procedure of fabricating anterior chairside F...

  8. The influence of erupting lateral teeth on maxillary anterior crowding in two Angle Class I maloclussion cases with high and low angles

    OpenAIRE

    Hiroshi Ueda; Morio Masunaga; Cynthia Concepcion; Kazuo Tanne

    2016-01-01

    Two cases of anterior crowding, both Skeletal Class I and Angle Class I maloclussion, one being low angle and the other high angle respectively, respectively, were treated and evaluated to ascertain whether or not there is a relationship among disproportionate mesial axial angulation of the maxillary lateral teeth and the Frankfurt Horizontal-Functional Occlusal plane, therefore generating maxillary anterior crowding. Both cases were Japanese boys, the first one aged 9 years 10 months with ch...

  9. 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

    Directory of Open Access Journals (Sweden)

    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.

  10. 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.

  11. Fusion and Gemination in a Primary Mandibular Anterior teeth - A Case Report.

    Directory of Open Access Journals (Sweden)

    Prasanna Kumar Rao

    2014-04-01

    Full Text Available Tooth fusion is one of the rare anomalies of the shape of the tooth. It is due to the union of two separate tooth germs. Tooth fusion and gemination in mandibular primary teeth has very little documentation in Indian population. These conditions requires a minimal intervention approach, preventive procedures, and a long-term follow-up. Here we report a rare case of fusion between left mandibular primary central and lateral incisors and gemination in right primary mandibular lateral incisor in a four year old boy. [Cukurova Med J 2014; 39(2.000: 336-338

  12. 正畸内收前牙所致牙体及牙周组织的不利改建%The adverse reconstruction of teeth and periodontal tissue caused by anterior teeth retraction

    Institute of Scientific and Technical Information of China (English)

    钱丽雯(综述); 钱玉芬(审校)

    2013-01-01

    内收前牙在安氏Ⅱ类错牙合畸形(上颌前突)及双颌前突患者正畸治疗中是不可或缺的步骤。内收前牙的关键在于能够高效移动牙齿的同时将对牙齿及其支持组织的损害减小至最低限度,然而临床上牙槽骨吸收、牙根吸收及牙龈退缩等现象在上述患者中很常见,有时甚至影响到正畸治疗的整体效果。本文对正畸内收前牙所导致牙体及牙周组织的不利改建及可能原因进行综述。%In cases of bimaxillary protrusion and Angle ClassⅡmalocclusion(maxilla hyperplasia),extraction of premo-lars and orthodontic treatment with retraction of the anterior teeth is a widely used approach. Minimizing the damage to teeth and their supporting tissue when moving teeth efficiently is needed. However many findings have shown that alveo-lar bone loss,root resorption and gingival recession occur after retracting the anterior teeth. Sometimes it even affects the overall effect of orthodontic treatment. This paper made a review of the adverse reconstruction of teeth and periodontal tis-sue caused by anterior teeth retraction and its possible risk factors.

  13. 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.

  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. 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.

  16. Cone-beam computed tomography study of the root and canal morphology of mandibular permanent anterior teeth in a Chongqing population

    Science.gov (United States)

    Zhengyan, Yang; Keke, Lu; Fei, Wang; Yueheng, Li; Zhi, Zhou

    2016-01-01

    Objective To investigate the root and canal morphology of permanent mandibular anterior teeth in a Chongqing population using cone-beam computed tomography (CBCT). Methods CBCT images of 1,725 patients in a Chongqing population were selected, and a total of 9,646 mandibular anterior teeth were analyzed. The number of root canals and the canal configurations were investigated. Results In total, 0.3% (11/3,257) of lateral incisors and 0.8% (26/3,014) of canines had double roots, and 3.8% (127/3,375) of central incisors, 10.6% (345/3,257) of lateral incisors, and 4.2% (127/3,014) of canines had multi-root canals. The difference in the incidence of multi-canals in lateral incisors between female and male was statistically significant. The frequency of multi-canals in the different age groups was 5.0% for central incisors for ages 21–30 years, 14.7% for lateral incisors for ages 41–50 years, and 8.1% for canines for ages 41–50 years. Conclusion With the limitations of the current study, we found that a high percentage of mandibular anterior teeth had multiple canals in the studied Chinese Chongqing population. The current data may provide clinicians practicing in Chongqing with a more thorough understanding of root canal morphology. PMID:26730198

  17. 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

  18. The influence of erupting lateral teeth on maxillary anterior crowding in two Angle Class I maloclussion cases with high and low angles

    Directory of Open Access Journals (Sweden)

    Hiroshi Ueda

    2016-01-01

    Full Text Available Two cases of anterior crowding, both Skeletal Class I and Angle Class I maloclussion, one being low angle and the other high angle respectively, respectively, were treated and evaluated to ascertain whether or not there is a relationship among disproportionate mesial axial angulation of the maxillary lateral teeth and the Frankfurt Horizontal-Functional Occlusal plane, therefore generating maxillary anterior crowding. Both cases were Japanese boys, the first one aged 9 years 10 months with chief complaint being anterior crowding and the second case aged 7 years and 8 months complaining of inadequate space for satisfying canine eruption. During and after the second stage of orthodontic treatment on both cases, several radiographic analysis were performed to assess treatment progress and retention; from these radiographs, it was noticed among other findings that in the high-angle case, the axial angulations of the maxillary lateral incisors were markedly smaller than in the low-angle case, thus indicating mesial tipping in the upper dental arch. This decreased mesial axial angulation of the lateral teeth observed at high angles may potentially cause maxillary space deficiency.

  19. 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.

  20. 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

  1. Investigation of shade selection on all-ceramic restorations of anterior teeth%全瓷修复体前牙比色现况调查

    Institute of Scientific and Technical Information of China (English)

    刘莹莹; 王芳; 钟晓霞; 邓华颉

    2013-01-01

    Objective: The aim of the survey was to obtain the basic information of shade selection on all-ceramic restorations of the anterior teeth so as to enhance doctor's understanding of color matching and improve their quality of shade selection. Method:474 pieces of anterior teeth working authorizations of all-ceramic restorations were divided into three groups according to the level of consignor. The questionnaire included tooth position, patient age, gender, including doctor partition colorimetric, whether digital photography auxiliary colorimetric or whether to record color special anatomical structure of the patient characteristics including stained, cracked, developmental ditch projects. Result: The statistical test showed there was significant difference in patient age, gender, doctor partition colorimetric and digital photography auxiliary colori- metric among these three groups. Conclusion: In this survey, the quality of shade selection on all-ceramic restorations of anterior teeth is generally ignored by dentists. Doctors for the partition colorimetric and digital photography auxiliary colorimet- ric technique needs to be future strengthened.%目的:了解全瓷修复体前牙比色情况,增强医生对全瓷牙与天然牙颜色匹配度的认识,进一步提高修复体比色质量.方法:搜集全瓷修复体前牙加工单共474份,根据医生所在单位等级将加工单分为3组,对其比色信息进行调查.调查内容包括患者牙位、年龄、性别,包括医生是否分区比色或特殊配色、是否有数码摄影辅助比色、是否记录患者特征色,特殊解剖结构,包括染色、隐裂、发育沟等项目.结果:3组调查项目的差异主要集中在年龄、性别、分区比色或特殊配色、数码摄影辅助比色方面.结论:全瓷修复体前牙的比色表达情况受到普遍忽视,医生对于全瓷材料前牙的分区比色或数码摄影辅助比色等技术有待进一步加强.

  2. Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding

    OpenAIRE

    Mutinelli, Sabrina; Manfredi, Mario; Guiducci, Antonio; Denotti, Gloria; Cozzani, Mauro

    2015-01-01

    Background Anchorage onto permanent dentition is a common procedure in rapid maxillary expansion. However, replacing first permanent molars with the second deciduous molars seems to be an option to reduce some negative side effects during orthodontic treatment. The purpose of this study was to evaluate the dental effect of rapid maxillary expansion with anchorage exclusively onto deciduous teeth performed in the first period of transition. Methods Twenty patients with a lateral cross-bite tre...

  3. 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

  4. 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.

  5. 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.

  6. 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.

  7. 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

  8. 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 cavity preparation resulted in lesser loss of dentin in the peri-cervical region. PMID:27656065

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

    OpenAIRE

    2014-01-01

    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 ...

  10. 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.

  11. Your Teeth

    Science.gov (United States)

    ... Homework? Here's Help White House Lunch Recipes Your Teeth KidsHealth > For Kids > Your Teeth Print A A ... help you talk. So let's talk teeth! Tiny Teeth Unlike your heart or brain, your teeth weren' ...

  12. 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.

  13. 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。

  14. Analysis on the features of tooth wear of anterior teeth in 832 adults with the age of 35~54 years old%832名35~54岁成年人前牙磨损特征分析

    Institute of Scientific and Technical Information of China (English)

    王珺; 吉凯

    2013-01-01

    目的:分析当代成年人的前牙磨损特征.方法:以832名35 ~ 54岁成年人为研究对象,评价其前牙磨损指数,并对年龄、性别、有无磨牙症史及饮食习惯等情况进行问卷调查.结果:①前牙重度磨损发生率34.67%;②45 ~54岁年龄组前牙平均磨损指数高于35 ~44岁年龄组(P<0.05);③男性前牙平均磨损指数高于女性(P<0.05);④前牙磨损指数与磨牙症、酗酒关系密切(P<0.05).结论:①前牙磨损具有明显的增龄性效应;②磨牙症、酗酒是本样本人群前牙磨损的重要危险因素.%Objective To investigate the clinical features of tooth wear of anterior teeth in adults.Methods 832 adults with the age of 35~54 years old were involved.The tooth wear index of anterior teeth was analyzed,and data about their age,sex,bruxism and the dietary pattern were collected.Results ①The incidence of severe tooth wear in anterior teeth was 34.67%.②The tooth wear index in 45~54 age group was higher than that in 35~44 age group (P<0.05).③The tooth wear index in male was higher than that in female(P<0.05).④The tooth index of anterior teeth has close relationship with bruxism and excessive drinking.Conclusion ①The tooth wear index of anterior teeth in adults is age-dependent.②Bruxism and excessive drinking are important risk factors for tooth wear of anterior teeth in the present sample.

  15. Application of cone - beam computed tomography in location of unerupted supernumerary teeth of anterior maxilla in children%锥形束CT在儿童上颌前部埋伏多生牙定位中的应用

    Institute of Scientific and Technical Information of China (English)

    王鑫; 汪学华; 陆钰; 汪庆胜; 甘朝兵; 沈洋

    2011-01-01

    Objective To evaluate the value of cone - beam computed tomography ( CBCT) in identification the position of unerupt-ed supernumerary teeth of anterior maxilla in adolescent. Methods Scanning by CBCT were used in cases with supernumerary teeth founded in the clinic by conventional X - ray examination to analysis the location of impacted teeth, determine the surgical approach, and then remove the teeth. Results The images of CBCT displayed in 16 patients with 20 supernumerary teeth of anterior maxilla, 13 in the palatal side, 5 in the labial side, 2 in the middle of alveolar, the representation the unerupted teeth seen in surgery was the same with that of the CBCT before exodontia. CBCT can accurately show the number of supernumerary teeth, crown and root morphology, labial or palatal side of the location, eruption orientation and relationship with adjacent teeth. Conclusion CBCT is the most precise and effective method to determine the authentic orientation of unerupted supernumerary teeth of anterior maxilla in adolescent.%目的 探讨锥形束CT技术在儿童上颌前部埋伏多生牙中的诊治应用价值.方法对在门诊常规X线检查中发现的埋伏多生牙病例,行锥形束CT扫描,分析判断埋伏牙的位置,确定手术进路,然后拔除.结果锥形束CT结果显示:16例患者20颗上颌前部埋伏多生牙,13颗位于腭侧,5颗位于唇侧,2颗位于牙槽骨中部,与术中所见一致.锥形束CT可以准确显示上颌前部埋伏多生牙的数量、牙冠牙根形态、唇腭侧位置、萌出方向及与邻牙关系.结论锥形束CT技术的应用是精确定位儿童上颌前部埋伏多生牙有效方法.

  16. 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

  17. Clinical study on the control of the anterior teeth movement using different heights of traction hook%不同高度的牵引钩对前牙移动控制的临床研究

    Institute of Scientific and Technical Information of China (English)

    姚宁; 高美琴; 顾永佳; 陆剑锋; 熊斌; 王林

    2015-01-01

    Objective To study the effects of MIA ( mini-implant anchorage ) combined with traction hooks with different heights on the movement of anterior teeth in order to better use the MIA in orthodontic treatment .Methods 24 patients with severe maxillary pro-trusion were randomly divided into experimental group and control group ,each containing 12 patients.The patients were treated with MIA and straight wire appliance by sliding mechanics to retract anterior teeth and narrow the extraction space .2 mm hooks in experi-ment group and 6 mm hooks in control group were used for retraction .Cephalometric radiographs were collected before and after the an-terior teeth retraction and t-test was used to analysis the data .Results 0.31 mm maxillary molar mesial movement was observed in both groups and the anterior teeth were retracted effectively and uprighted .In the experiment group ,anterior teeth were intruded about 1.82mm,while anterior teeth were protruded about 1.05 mm in the control group .Conclusions As the height of traction hook in-creased,the elongation tendency of anterior teeth increased during the retraction process ,and the lingual movement of the maxillary an-terior teeth decreased .In the clinical treatment ,the traction hooks with different heights should be used according to the specific maloc-clusion.%目的:探讨微种植支抗结合不同高度的牵引钩对前牙移动的影响,为更好地利用微种植支抗辅助内收前牙提供临床基础。方法选择上颌严重前突患者24例,随机分为实验组和对照组,每组12例。采用微种植支抗结合直丝弓技术滑动法内收前牙关闭拔牙间隙;实验组采用2 mm长牵引钩,对照组采用6 mm长牵引钩。内收前牙前后拍摄头颅侧位片进行相关指标的测量分析,配对t 检验比较组间差别。结果实验组(2 mm)和对照组(6 mm)拔牙间隙关闭后磨牙均少量前移(0.31 mm),上前牙明显内收且直立,实验组上

  18. 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。

  19. 离体下颌前牙唇舌向根管形态的研究%Survey of root canal configuration of mandibular anterior teeth in labiolingual direction

    Institute of Scientific and Technical Information of China (English)

    符大勇; 赵洪贞; 邓婧; 王玲香; 官群立

    2011-01-01

    目的 观察离体下颌前牙唇舌向根管形态及弯曲情况,为掌握正确地开髓方向提供依据.方法 采用间接数字化X线成像技术,对收集的离体105颗下颌前牙进行近远中向拍摄,根据Weine根管分类标准,观察根管类型;采用改良Schneider测量方法,分析根管弯曲情况.沿下颌前牙近远中向X线片根中1/3画延长线,观察延长线在下颌前牙切端的位置.结果 下颌前牙根管在唇舌向半数以上存在弯曲,根尖多数弯向唇侧,弯曲部位多集中在根尖1/3.结论 下颌前牙根管形态较为复杂,弯曲率较高,开髓方向应靠近切缘.%Objective To Investigate the root canal configuration and canal curvature of permanent mandibular anterior teeth in labiolingual direction. Methods A total of 105 anterior teeth were collected and examined by indirect digital X-ray radiography from labiolingual direction. The canal configuration and curvature was analyzed by Weine and Schneider methods. Results Most root canals of mandibular anterior teeth were type I, and more than half were mesialdistally curved. The most curved place was located in the apical third of the canal. Conclusion Root canal configuration of mandibular anterior teeth are relatively complex and have a higher bending rates. The direction of pulp explosure should be close to the incisal edge.

  20. 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

  1. In vivo measurements of daily UV exposure of human anterior teeth using CaF2:Tb,Sm as a thermoluminescence dosimeter

    International Nuclear Information System (INIS)

    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 CaF2: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 CaF2 co-doped with Tb4O7 and Sm2O3 (sintered CaF2: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/cm2 (32.7-143.8 mJ/cm2), 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.

  2. Determining utility values in patients with anterior cruciate ligament tears using clinical scoring systems

    Directory of Open Access Journals (Sweden)

    Szucs Thomas

    2011-08-01

    Full Text Available Abstract Background Several instruments and clinical scoring systems have been established to evaluate patients with ligamentous knee injuries. A comparison of individual articles in the literature is challenging, not only because of heterogeneity in methodology, but also due to the variety of the scoring systems used to document clinical outcomes. There is limited information about the correlation between used scores and quality of life with no information being available on the impact of each score on the utility values. The aim of this study was to compare the most commonly used scores for evaluating patients with anterior cruciate ligament (ACL injuries, and to establish corresponding utility values. These values will be used for the interpretation and comparison of outcome results in the currently available literature for different treatment options. Methods Four hypothetical vignettes were defined, based on different levels of activities after rupture of the ACL to simulate typical situations seen in daily practice. A questionnaire, including the Health Utility Index (HUI for utility values, the IKDC subjective score, the Lysholm and the Tegner score, was created and 25 orthopedic surgeons were asked to fill the questionnaire for each hypothetical patient as proxies for all patients they had treated and who would fit in that hypothetical vignette. Results The utility value as an indicator for quality of life increased with the level of activity. Having discomforts already during normal activities of daily living was rated with a mean utility value of 0.37 ± 0.19, half of that of a situation where mild sport activity was possible without discomfort (0.78 ± 0.11. All investigated scores were able to distinguish clearly (p Conclusions Here we report the correlation between the most commonly used scores for the assessment of patients with a ruptured ACL and utility values as an indicator of quality of life. Assumptions were based on expert

  3. 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.

  4. Localization analysis and application of cone-beam CT about the embedded supernumerary teeth in anterior maxillary%上前牙区埋伏多生牙的CBCT定位分析与应用

    Institute of Scientific and Technical Information of China (English)

    张新风; 王鹏来; 刘超; 程庆涛; 窦文军; 刘刚

    2012-01-01

    Objective Using CBCT to locate and analyze the embedded supernumerary teeth in the anterior maxillary region,and evaluating the clinical value of CBCT. Methods 58 cases.whose embedded supernumerary teeth in the anterior maxillary region were detected by conventional X-ray examination,but difficult to accurately locate.were examined by CBCT scanning. Three-dimensional images were obtained for localization analysis. According to the CBCT information.we determined the surgical approach,and guided the clinical operation. Results 58 cases who had 73 embedded supernumerary teeth were examind by CBCT scanning. CBCT clearly demonstrated the number.labial or palatal location, morphology, and the surrounding anatomical structures of the embedded supernumerary teeth. With the guiding of CBCT, all embedded supernumerary teeth were successfully removed. Conlusion CBCT can accurately locate the embedded supernumerary teeth in anterior maxillary,guide operation and reduce surgical damage to the adjacent hard and soft tissue.%目的:利用锥形束CT对上前牙区埋伏多生牙进行定位分析,并评价其临床应用价值.方法:对门诊常规X线检查难以准确定位的58例上前牙区埋伏多生牙患者行CBCT扫描,三维重建,对埋伏多生牙行定位分析,确定手术进路,指导临床手术.结果:CBCT精确定位58例患者73颗上前牙区埋伏多生牙,清晰直观得显示了多生牙的数目、位置、形态、与周围解剖结构毗邻关系,根据CBCT信息制订手术方案,患者均顺利拔除多生牙.结论:锥形束CT可以准确定位埋伏多生牙,利于术中发现多生牙,减少手术对邻近软硬组织的损伤.

  5. 前牙压低技术在深覆(牙合)患者矫治中的应用进展%Progress of anterior teeth intrusion in deep overbite treatment

    Institute of Scientific and Technical Information of China (English)

    陆史俊

    2011-01-01

    深覆(牙合)的治疗是口腔正畸矫治的难点之一.对于伴有垂直生长型、长面型或上唇过短、露龈笑的患者,就更需要医生进行细致诊断,合理选择矫治方法和器械.通过单纯地压低前牙能较为有效地治疗该类患者的深覆(牙合)畸形.目前,临床常用的压低前牙的方法主要有三段式片段弓技术、多用途弓技术、J钩联合高位牵引技术和微种植支抗技术等.本文就常见的前牙压低技术的方法、生物力学机制、临床疗效评价及其对周围软硬组织的影响等方面作一综述,希望为临床使用提供参考.%Deep overbite correction is one of the difficulties in orthodontic treatment. If a patient is a vertical growth patter associated with long face or gummy smile, that need doctor to diagnosis carefully and chose a reasonable methods and equipment. Anterior teeth intrusion can treat such patients with deep overbite more effectively. There are some intrusive technologies such as: 3-pieces segment arch, utility arch, J-hook, mini-implant, and so on. The aim of this article was to review the intrusion technology, biomechanical mechanisms, clinical treatment evaluation and their impact on surrounding tissues.

  6. 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。

  7. 半脱位恒前牙两种固定方式的对比研究%A comparative study on two fixation methods of permanent anterior teeth

    Institute of Scientific and Technical Information of China (English)

    杨丽荣; 柯正健; 邹小贤

    2013-01-01

    目的:对比研究钢丝-树脂夹板固定与牙弓夹板固定在半脱位恒前牙固定方式的临床效果.方法:收集2008 ~ 2012年就诊于我院的132例牙外伤患者的152颗半脱位恒前牙完整病例资料,进行回顾性研究,并进行统计学分析.结果:152颗半脱位恒前牙中有钢丝-树脂夹板固定93颗,牙弓夹板固定59颗,两种固定方法成功率分别为95.69%和88.13%,钢丝-树脂夹板固定技术在控制牙外形、牙弓形态、远期效果上优于牙弓夹板技术,差异有统计学意义(P<0.05).结论:两种方法在半脱位恒前牙固定中均疗效肯定,但钢丝-树脂夹板固定技术应其预后效果良好,更宜在临床推广.%Objective: To study the clinical effect of ultrastrength textile fiber in the fixation of dislocated tooth. Methods Collecting material of 152 subluxation of permanent anterior teeth from 132 patients with dental trauma during year 2008 to 2012. A retrospective study was carried out, and statistical analysis. Results 93 teeth used steel wire resin splint fixation in 152 permanent anterior teeth, 59 teeth were dental arch splint, the success rate of two different fixation methods were 95.69% and 88.13%, steel wire resin splint fixation technology in the control of dental arch form, shape, long-term effect is better than that of dental arch splint technique, the difference was statistically significant (P< 0.05). Conclusion Two kinds of treatments of Subluxation of permanent anterior teeth fix are effective, but Steel wire resin splint fixation technique attended with good results,suitable for clinical application.

  8. Clinical evaluation of IPS e.max Press ceramic endocrowns in individual maxillary anterior teeth malposition%铸瓷髓腔固位冠修复个别上前牙错位的疗效观察

    Institute of Scientific and Technical Information of China (English)

    李雪铃; 杨凌; 朱文军; 林雪峰

    2015-01-01

    Objective The present study aimed to evaluate the clinical effects of IPS e.max Press ceramic endocrowns applied in individual maxillary anterior teeth malposition. Methods Fifteen malposed maxillary anterior teeth were selected from fifteen patients in this study. All the malposed teeth had been endodontically treated and performed with ultrasonic scaling. After 1-2 weeks, the IPS e.max Press ceramic endocrowns were fabricated and cemented with resin cement. The color, shape, margin fitness, preservation of the restorations and the gingival health of the abutments were reviewed after 6 months and 12 months respectively. Results The margins of all restorations were well sealed; the colorsand shapes of the restorations were satisfied and matched with the natural teeth; and the periodontal tissues of the abutments were healthy. Except for one case with displacement of the abutment, the remaining endocrowns were functioning well without loosening. The preservation rate of the restorations was 100%(15/15), and the clinically acceptable rate was 93.3%(14/15). Conclusions Application of IPS e.max Press ceramic endocrowns in repairing individual maxillary anterior teeth malposition could obtain satisfied effects.%目的:探讨IPS e.max Press铸瓷髓腔固位冠在个别上前牙错位修复中的临床疗效。方法选择15例个别上前牙错位的患者,经完善根管治疗和(或)牙周治疗,1~2周后制作IPS e.max Press铸瓷髓腔固位冠,树脂粘接剂粘固。并于6个月、1年后复查修复体的颜色、形态、边缘密合性、牙龈健康情况、基牙及修复体的保存情况。结果1年内所有修复体边缘密合、牙龈健康、颜色美观;除1例基牙移位外,其余髓腔固位冠无松动移位。保存率100%(15/15),临床可接受率为93.3%(14/15)。结论 IPS e.max Press铸瓷髓腔固位冠用于个别上前牙错位的修复可取得良好的效果。

  9. Gingival fibromatosis with hemi-osseous hyperplasia of jaws, focal maxillary viral papillomatosis of gingiva, fissured tongue and congenitally missing anterior teeth: a case report and surgical management of a new syndrome.

    Science.gov (United States)

    Reddy, M Sesha; Manyam, Ravikanth; Babu, M Narendera; Saraswathi, T R

    2011-01-01

    Gingival fibromatosis is characterized by fibrotic enlargement of the gingiva that can occur as inherited or sporadic form. Inherited form can be an isolated trait or as a component of a syndrome. This article reports a 35 year old male patient affected by gingival fibromatosis associated with hemiosseous hyperplasia of mandible, maxilla, and zygoma on the right side, viral papillomatosis of maxillary anterior gingiva, fissured tongue and congenitally missing anterior teeth. The patient was subjected to phase I and phase II periodontal therapy. There was no evidence of recurrence of the enlargement after one year but the papillomatosis recurred. Gingival fibromatosis has been reported to be associated with various other abnormalities but not with those described in our case. This observation raises the possibility that the coexistence of these entities in our case may represent a new syndrome.

  10. Gingival fibromatosis with hemi-osseous hyperplasia of jaws, focal maxillary viral papillomatosis of gingiva, fissured tongue and congenitally missing anterior teeth: A case report and surgical management of a new syndrome

    Directory of Open Access Journals (Sweden)

    M Sesha Reddy

    2011-01-01

    Full Text Available Gingival fibromatosis is characterized by fibrotic enlargement of the gingiva that can occur as inherited or sporadic form. Inherited form can be an isolated trait or as a component of a syndrome. This article reports a 35 year old male patient affected by gingival fibromatosis associated with hemiosseous hyperplasia of mandible, maxilla, and zygoma on the right side, viral papillomatosis of maxillary anterior gingiva, fissured tongue and congenitally missing anterior teeth. The patient was subjected to phase I and phase II periodontal therapy. There was no evidence of recurrence of the enlargement after one year but the papillomatosis recurred. Gingival fibromatosis has been reported to be associated with various other abnormalities but not with those described in our case. This observation raises the possibility that the coexistence of these entities in our case may represent a new syndrome.

  11. Imaging study of root canal apical morphology of mandibular anterior teeth%下颌前牙根管根尖部形态的影像学研究

    Institute of Scientific and Technical Information of China (English)

    张文; 彭彬

    2013-01-01

    Objective To investigate the root canal diameters,cross-section morphology and tapers of the root canal apical part of human mandibular anterior teeth.Methods A total of 481 mandibular anterior teeth were examined by Digora indirect digital radiography both from buccolingual and mesiodistal directions.Root canal types,root canal apical part diameters,cross-section morphology and tapers were analyzed.Results The major sort of mandibular anterior teeth was type Ⅰ,while 25.46% mandibular incisors and 13.21% mandibular canines were type Ⅱ,Ⅲ and Ⅳ root canals.In the type Ⅰ root canals,buccolingual diameters (median) were larger than mesiodistal diameters (median),and the buccolingual diameter (median) at 1 mm from apex was 0.32 mm.In the mandibular anterior teeth,buccolingual tapers were larger than mesiodistal tapers,and the buccolingual tapers (median)were more than 0.10.Conclusions Mandibular anteriors' root canal apical morphology is quite complicated.To archive perfect clinical treatment effect of mandible anterior teeth,the master point file should select at least 35# root canal files cooperated with root canal irrigation,modified root canal preparation technique and strengthen disinfection technique.%目的 探讨下颌前牙根管根尖部的内径、横截面形态和锥度.方法 采用Digora间接数字化成像技术拍摄481颗下颌前牙的近远中向和颊舌向X线影像,分析根管的分型、根管根尖部内径、横截面形态和锥度.结果 下颌前牙以Ⅰ型根管为主,但仍有25.46%的下颌切牙和13.21%的下颌尖牙出现Ⅱ、Ⅲ和Ⅳ型根管.在Ⅰ型根管中,颊舌径(中间值)大于近远中径(中间值),且下颌切牙和尖牙距根尖1 mm处颊舌径的中间值为0.32 mm;下颌前牙颊舌向锥度大于近远中向锥度,颊舌向锥度的中间值大于0.10.结论 下颌前牙的根管根尖部形态较为复杂.预备单根管下颌前牙时主尖锉应选用至少35#的根管锉,并配合根管

  12. 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

  13. 锥形束CT诊断上颌前牙区多生牙价值研究%Evaluation of cone-beam CT in diagnosis of supernumerary teeth in the anterior maxilla

    Institute of Scientific and Technical Information of China (English)

    文陈妮; 李果; 任家银; 郑广宁

    2012-01-01

    Objective To evaluate the value of cone-beam CT (CBCT) in the diagnosis and orientation of supernumerary teeth in the anterior maxilla. Methods 195 supernumerary teeth in the anterior maxilla of 146 patients were included, which were examined by CBCT. The number, shape, size, 3-dimensional position, growth direction of the supernumeraries and their relationship with the neighboring teeth were analyzed. Results The 146 patients aged from 5 to 39, and males were affected more than females in a ratio of 2.95-1. 102(69.9%) patients had single supernumerary teeth. Of the 195 supernumerary teeth, 126(64.6%) were near the middle line, 131(67.2%) were conical, 51 (26.2%) were curved root, 98(50.3%) were inverted and had a length of (11.97?.40) mm. The supernumerary teeth often caused complications. Conclusion The position of the supernumerary teeth is varied in the maxilla* and often causes permanent dentition complications. CBCT imaging yields accurate 3-dimensional pictures of supernumerary teeth, local dental and bony structures, which is helpful for diagnosis and orientation of supernumerary teeth.%目的 回顾性分析锥形束CT(CBCT)在上颌前牙区多生牙诊断及定位中的价值.方法 以经CBCT确诊为上颌前牙区多生牙的146例患者的195颗多生牙为研究对象,分析多生牙的数目、形态、大小、空间位置、生长方向及其与邻近组织的关系.结果 146例患者年龄5 ~39岁,男女比例为2.95∶1,其中102例(69.9%)为单颗多生牙.195颗多生牙的长度平均为(11.97±2.40) mm,其中,126颗(64.6%)位于中线区,131颗(67.2%)为圆锥形,51颗(26.2%)牙根弯曲,98颗(50.3%)牙冠生长方向倒置,133颗(68.2%)与邻近恒牙或恒牙胚有接触,恒牙牙列常伴有各种异常.结论 多生牙空间位置变异大,可引起恒牙列病变.CBCT检查能精确直观地显示上颌前牙区多生牙及其与周围组织关系,对多生牙的诊断及定位具有重要的指导意义.

  14. 微种植体支抗压低前牙的临床与基础研究%The clinical and basic research of mini -implant anchorage for the anterior teeth intrusion

    Institute of Scientific and Technical Information of China (English)

    王亚楠; 杨四维

    2013-01-01

    The traditional methods are often not effective in intruding the anterior teeth, opening the bite and improv-ing the gummy smile during the orthodontic treatment. Mini-implant anchorage as an absolute anchorage can be im-planted into any part of the jaw. It can apply the absolute intrusion and also can produce a good clinical treatment effect. The aim of this article was to review the clinical and basic research of mini-implant anchorage for the anteri-or teeth intrusion.%  正畸临床矫治中在压低前牙,打开咬合,改善露龈笑时,传统方法对前牙施行绝对压低的效果往往不理想。微种植体支抗作为一种绝对支抗可植入颌骨任何部位,对前牙实施绝对的压低,产生良好的临床矫治效果。本文对微种植体支抗压低前牙的临床与基础研究作一综述。

  15. 氧化锆陶瓷固位钉用于修复前牙切角缺损的临床观察%Clinical observation of the zirconia ceramic pin in restoration of incisal corner defect of anterior teeth

    Institute of Scientific and Technical Information of China (English)

    景双林; 黄丽娟; 唐哲; 曹灵; 李琥; 汤春波; 张光东; 于金华

    2012-01-01

    Objective To evaluate the effects of self-made zirconia ceramic pin on restoration of incisal corner defect of anterior teeth. Methods We used CAD/CAM technique to manufacture zirconia ceramic pin. 80 cases with incisal cornar defect of anterior teeth were chosen,^ with vital pulp teeth and 44 with nonvital teeth after root caral therapy.Then,we used these pins in combination with resin to restore the incisal corner defect of 40 anterior teeth,and they were grouped as the experimental group. Composite resins without pins were applied to restore the incisal corner defects of the other 40 anterior teeth and they were used as the control group. Clinical effects were observed according to termly follow-ups. Results After one-year follow-up ,36 cases in experimental group were successful ,3 cases failed and one case was missed in the follow-up.20 cases in the control group were successful, 18 cases failed and 2 cases were missed in the follow-up.There was a significant difference in the success rates between the pin group (92.3% ) and control group (52.6% ) (P < 0.01). Conclusions During incisal corner defect restoration,the zirconia ceramic pin can significantly enhance the retention capacity of composite resin,and it is considered as a kind of novel and useful dentin pin.%目的 探讨自行研制的氧化锆陶瓷固位钉用于前牙切角缺损修复的疗效.方法 选择临床前牙切角缺损病例80例,其中活髓牙36例,死髓牙已行根管治疗44例,随机分为两组,每组40例,实验组采用CAD/CAM氧化锆陶瓷固位钉加树脂联合修复,对照组采用树脂直接充填修复,定期随访,观察其临床修复效果.结果 1年随访,实验组成功36例,失败3例,失访1例,成功率92.3%;对照组成功20例,失败18例,失访2例,成功率52.6%.两组之间比较有显著性差异(P<0.01).结论 在切角缺损修复过程中,氧化锆陶瓷固位钉可明显增强复合树脂的固位,是一种新型牙本质固位钉.

  16. Curative effect of deciduous anterior teeth crossbite treated with fixed appliance%正畸固定矫治器矫治乳前牙反�的疗效观察

    Institute of Scientific and Technical Information of China (English)

    卢仕英; 谭桂萍; 黄敏方

    2014-01-01

    Objective To explore the curative effect of deciduous anterior teeth crossbite treated with fixed appliance.Methods The curative effect of fixed appliance on deciduous anterior teeth crossbite in 15 children trea-ted in orthodontics department of People′s Hospital of Guangxi Zhuang Autonomous Region from 2011 to 2014 were analyzed.Results The longest curative course for crossbite to be quitted in 15 children was 2 months,the shortest was 3 weeks.Average total treatment course was (4 ±0.5)months.Deciduous anterior tooth overjet and overbite were normal after treatment .The curative effect of 13 children were stable following 2 years after treatment ,and just 2 pa-tients who had hereditary skeletal crossbite family history had a relapse .Conclusion Treatment for deciduous anteri-or teeth crossbite with fixed appliance need little cooperation from the child ,diminish child′s times of return visit ,can quit crossbite smoothly ,and was effective highly .%目的:探讨固定矫治器治疗乳前牙反�的疗效。方法对2011-01~2014-03在广西壮族自治区人民医院口腔正畸科自愿选择固定矫治器进行矫治的15例错�畸形病例的治疗效果进行分析。结果15例患者最长反�解除时间2个月,最短3周,平均疗程(4±0.5)个月。矫治后前牙覆�(牙�)覆盖关系正常,追踪2年,13例牙性及功能性反�疗效稳定,无复发。2例有骨性反�遗传史,反�复发。结论固定矫治器治疗乳前牙反�能够减少患儿的不配合及就诊次数,并顺利地解除乳前牙反�,是一种治疗乳前牙反�的高效矫治器。

  17. 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.

  18. Effect of occlusal adjustment on the mobility of anterior teeth with different attachment levels%咬合力调整对不同附着水平前牙动度的影响

    Institute of Scientific and Technical Information of China (English)

    张志媛; 辛海涛; 寇亚莎; 赵艳芳; 吴玉禄

    2013-01-01

    AIM: To investigate the effect of occlusal adjustment (OA) on the mobility and periodontium remodeling of anterior teeth with clinical attachment loss ( CAL). METHODS:197 anterior teeth with CAL in 26 patients were divided into 3 groups according to the degree of CAL: 0~2 mm (n = 66) , 2~4 mm ( n = 67) and 4~6 mm ( n = 64). The teeth with excessive bite force was detected and received occlusal adjustment by T-Scan Ⅲ digital occlusal system. The mobility was recorded once a month using a laser displacement sensor from the beginning of the test to the end of the third month. A repeated measurement analysis of the variance was performed to analyze the effect of OA on teeth mobility and periodontium remodeling. RESULTS: There was a significant decrease (P 0. 05 ) when the CAL exceed 4mm. CONCLUSION: OA can reduce the mobility of anterior teeth with CAL less than 4mm, and can improve the periodontium remodeling of these teeth, when the CAL is more than 4mm the effects may not be significant.%目的:对存在牙周附着丧失并伴有咬合力过大的前牙进行咬合调整,分析咬合力降低对牙周附着丧失前牙的动度和牙周组织改建的影响.方法:选取26名患者197个存在牙周附着丧失且伴有咬合力过大的前牙,根据牙周附着丧失水平的不同分为3组:0~2mm组(66个牙)、2~4 mm组(67个牙)、4~6 mm组(64个牙).采用T-ScanⅢ数字咬合测试系统对不同附着水平前牙的咬合力进行测量,对咬合力过大的前牙给予咬合调整治疗.运用激光位移测试仪测量咬合调整后3个月内的牙齿动度,采用重复测量方差分析来研究咬合调整对不同附着丧失前牙动度的影响.结果:咬合调整后3个月内牙周附着丧失≤4 mm的前牙动度明显下降(P<0.05).附着丧失>4 mm的牙齿动度较未调(牙合)组无统计学差异(P>0.05).结论:咬合力调整能明显降低附着丧失≤4 mm的前牙动度,促进其牙周组织的改建.对于附着丧

  19. Clinical utility of anterior segment swept-source optical coherence tomography in glaucoma

    Directory of Open Access Journals (Sweden)

    Dewang Angmo

    2016-01-01

    Full Text Available Optical coherence tomography (OCT, a noninvasive imaging modality that uses low-coherence light to obtain a high-resolution cross-section of biological structures, has evolved dramatically over the years. The Swept-source OCT (SS-OCT makes use of a single detector with a rapidly tunable laser as a light source. The Casia SS-1000 OCT is a Fourier-domain, SS-OCT designed specifically for imaging the anterior segment. This system achieves high resolution imaging of 10΅m (Axial and 30΅m (Transverse and high speed scanning of 30,000 A-scans per second. With a substantial improvement in scan speed, the anterior chamber angles can be imaged 360 degrees in 128 cross sections (each with 512 A-scans in about 2.4 seconds. We summarize the clinical applications of anterior segment SS-OCT in Glaucoma. Literature search: We searched PubMed and included Medline using the phrases anterior segment optical coherence tomography in ophthalmology, swept-source OCT, use of AS-OCT in glaucoma, use of swept-source AS-OCT in glaucoma, quantitative assessment of angle, filtering bleb in AS-OCT, comparison of AS-OCT with gonioscopy and comparison of AS-OCT with UBM. Search was made for articles dating 1990 to August 2015.

  20. ESTHETICS IN PRIMARY TEETH

    Directory of Open Access Journals (Sweden)

    Mathew Renu Ann

    2013-08-01

    Full Text Available Dental esthetics is an integral part of facial esthetics. Esthetic problems in childhood and adolescence can have a significant effect on psychosocial development and interaction with peers. 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 for bonding, issues related to child behavior and finally cost of the treatment. The advent of different techniques, devices, and materials helps in creating beautiful restorations which help children and adolescents improve their self-image.

  1. 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.

  2. 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。

  3. 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。

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

    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

  5. 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

  6. Color Analysis of Maxillary Anterior Teeth of Uygur Youth in Urumqi.%乌鲁木齐市维吾尔族青年上前牙色度值的研究

    Institute of Scientific and Technical Information of China (English)

    王瑞文; 王锋; 崔杰; 何惠宇

    2011-01-01

    Objective: To study the color of Uygur youth's anterior teeth. Methods: Maxillary anterior teeth of 18-25 years' old Uygur youth were included. Color analysis system of digital camera and computer was used to measure the color of maxillary anterior teeth. Results: The L values of cervical, middle and incisal parts of uygur youngth's upper center incisors were 73.27±6.43, 75. 51±5.59, 66. 92±5.58. Those of the upper lateral incisors were 67.06±7.50, 68.43±8.38, 62.11±6.99. Those for the upper canines were 59.62±11.60, 60.40±9.10、55.11±8.73. Conclusion: In Urumqi, 18-25 year-old uygur youth presented the color distributing of maxillary anterior form upper central incisor to cuspid, L values change from high to low, and a, b values from low to high. The color in different areas of teeth were different: in middle 1/3, L values were the highest, but a and b values were the lowest; the L, a and b values in cervical 1/3 were higher than those in incisal 1/3.%目的:研究乌鲁木齐市维吾尔族青年上前牙天然牙的色度值,为临床制作仿真修复体提供参考.方法:采用数码相机及计算机色度分析系统采集、分析852颗18~25岁乌鲁木齐市维吾尔族青年上前牙天然牙的色度值.结果:维吾尔族青年的上颌中切牙颈、中、切的L值分别为73.27±6.43、75.51±5.59、66.92士5.58,侧切牙颈、中、切的L值分别为67.06±7.50、68.43±8.38、62.11±6.99,尖牙颈、中、切的L值分别为59.62±11.60、60.40±9.10、55.11±8.73.结论:乌鲁木齐市18~25岁维吾尔族青年的上前牙色度值从中切牙向尖牙方向均呈现明度逐渐降低,彩度逐渐增大;各个牙位的不同部位牙面的色度值也有变化,其中中1/3的明度值最大、彩度值最小,颈1/3的明度值和彩度值均高于切1/3.

  7. The prevalence of traumatic dental injuries to permanent anterior teeth and its relation with predisposing risk factors among 8-13 years school children of Vadodara city: An epidemiological study

    Directory of Open Access Journals (Sweden)

    M C Patel

    2012-01-01

    Full Text Available Background and objective: dental trauma is an irreversible pathology that after occurrence is characterized by life-long debilitating effects. The objectives of this study were to measure the prevalence of anterior teeth fracture and their association with predisposing factors such as lip coverage, molar relationship, overjet, and variables such as age, sex, cause, and place of trauma. Materials and Methods: an epidemiological cross-sectional study was carried out among 3708 school children aged 8-13 years in the Vadodara city. All children completed a questionnaire related to history of trauma to their anterior teeth after which they were examined for lip competence, Angle′s molar relationship amount of overjet and nature of trauma sustained. The results were statistically analyzed using the prevalence test, Chi-square test, and Mantel-Haenszel Common Odds Ratio. Results: the prevalence of traumatic injuries was 8.79% and the ratio of boys: girl′s was 1.28:1. Inadequate lip coverage group sustained about five times more injuries than the adequate lip coverage group (P = 0.000, OR= 5.407. The maximum traumatic injuries were seen in children having Angle Class II Div 1 molar relationship and/or overjet greater than 5.5 mm and was statistically significant (P<0.05. Maximum number of injuries occurred at 9 years of age. The most predominant injuries were enamel fractures, the most common place for occurrence was home and fall against object, the most frequent cause. Conclusion: the prevalence of dental injuries in the Vadodara city is high and it has a great potential to be considered as an emerging public health problem.

  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.

  9. 对正常(牙合)者上颌前牙相互间牙冠宽度比例的计算机图像测量分析%Digital Image Measurement and Analysis of Crown Width Ratio between Maxillary Anterior Teeth in Population of Normal Occlusion

    Institute of Scientific and Technical Information of China (English)

    陈润; 杨舟; 吴千驹; 张小宾; 林淑娇; 叶燕惠

    2012-01-01

    Objective To provide clinical guidance for aesthetic restoration design of anterior teeth by analyzing crown width ratio between maxillary anterior teeth. Methods 96 young people meeting inclusion criteria were selected in this study. Front images of all maxillary anterior teeth in these people were taken by a digital camera and 13 final photos were chosen by Delphi technique. The width of maxillary anterior teeth in those photos was measured digitally and the -width ratio bet-ween maxillary anterior teeth was analyzed simultaneously. Results There was significant difference between golden section proportion and width ratio which was calculated by lateral incisor/ central incisor(t = 11. 959, P<0. 01). So was the result bet-ween golden section proportion and width ration which was acquired by canine/lateral incisor. The difference also existed between RED and width ratio mentioned above. Conclusion Golden section proportion and RED were not found in crown width ratio between maxillary anterior teeth of young people possessing normal occlusion in this study. However, the width ratio of maxillary anterior teeth presented an interval centralized tendency.%目的 通过对上颌前牙相互间牙冠宽度比例的研究,为临床前牙美学修复设计提供指导.方法 按纳入标准筛选正常(牙合)青年96人,分别拍摄上颌前牙正面相,并通过德尔菲法评选得到最终13幅照片,测量计算机图像上颌前牙宽度,分析上颌前牙相互间牙冠宽度的比例关系.结果 上颌侧切牙与中切牙以及上颌尖牙与侧切牙相互间的宽度比例关系与黄金分割比例关系差别具有统计学意义;上颌侧切牙与中切牙以及上颌尖牙与侧切牙相互间的宽度比例关系与RED比例关系差别具有统计学意义.结论 正常(牙合)青年上颌前牙相互间牙冠宽度未发现黄金分割比例关系及RED比例,但其比例系数有区间集中的趋势.

  10. Shape analysis of healthy gingival curve in maxillary anterior teeth in 120 Chinese youth%120例中国青年健康上前牙牙龈曲线形状特征分析

    Institute of Scientific and Technical Information of China (English)

    张豪; 乐迪; 胡文杰; 曹占强; 张艳玲

    2013-01-01

    目的:以数学上曲线分析的拐点定义为特征点,对上前牙健康牙龈的曲线特征进行分析,建立龈缘高点、牙龈曲线特征点(拐点)、接触点之间的位置关系,以获取个性化的牙龈曲线特征,为前牙修复体的接触点位置设计提供参考依据,为修复后恢复自然形态的龈乳头创造条件.方法:对120名中国青年健康上前牙的牙龈曲线进行以标准化数码图片为基础的二维牙龈曲线形态分析,测量各种形态特征值及确定牙龈曲线特征点(拐点)与龈缘高点、接触点之间的位置关系.结果:在上颌前牙区,中切牙、侧切牙、尖牙近中牙龈乳头高度平均值依次为(4.49±0.86) mm、(3.64±0.77) mm和(4.12±0.92) mm;远中牙龈乳头高度平均值依次为(4.09 ±0.72) mm、(3.48±0.83) mm和(4.13±0.94) mm.在上颌前牙区,中切牙牙龈曲线的近中拐点的横纵向比例为0.61±0.10和0.26±0.07,远中拐点的横纵向比例为0.57±0.10和0.25±0.07;侧切牙牙龈曲线的近中拐点的横纵向比例为0.50±0.10和0.23 ±0.08,远中拐点的横纵向比例为0.26±0.08和0.56 ±0.11;尖牙牙龈曲线的近中拐点的横纵向比例为0.52±0.09和0.23 ±0.07,远中拐点的横纵向比例为0.60 ±0.12和0.26 ±0.08.结论:上前牙不同牙位的龈乳头形状和牙龈曲线分布有一定的规律,上前牙各个牙位近远中牙龈曲线的特征点(拐点)位置和牙龈缘高点、接触点之间存在数量关系.%To establish the relationship of the gingival crest, the gingival curve characteristic point (inflection point, IP) and the contact points and to use it as reference to design the location of contact area in anterior teeth restoration to form the natural papillae. Methods; Two-dimensional gingival curve morphology analysis based on standardized digital images was done to measure the value of different points in the upper anterior teeth for 120 young Chinese. Results; In the maxillary anterior teeth, the

  11. 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.

  12. Survey on the Long Term Restorative Effect of Nursing Instruction After Veneer Restoration of Anterior Teeth%前牙瓷贴面修复术后护理宣教对远期效果影响的调查

    Institute of Scientific and Technical Information of China (English)

    胡爱云; 林玉婷

    2015-01-01

    Objectives To survey on the nursing instruction after veneer restoration of anterior teeth and long term restorative effect, and analyze their relationships.Methods We investigated 69 patients with 196 veneer restorations of anterior teeth via questionnaire and oral examination to gather data on nursing instruction, daily maintenance measure and long term restorative effect of veneer. These data were statistically analyzed by SPSS.Results Comparing with doctors' oral advices, patients with nursing instruction after veneer restoration presented higher teeth brushing and dental lfoss score. There was no difference on hard food masticating and color drinks drinking hobbits. Long term evaluation of veneers showed lower adhesive failure, ceramic fracture, secondary caries and staining of restoration on nursing instructed patients.Conclusion Nursing instruction after veneer restoration of anterior teeth could help to developing better daily maintenance measures, reducing the rate of adhesive failure, ceramic fracture, secondary caries and staining of restoration, and promote the long term restorative effects.%目的:通过调查前牙瓷贴面修复患者术后护理宣教及贴面修复远期效果,探讨两者间的关系。方法对在我科修复专业进行前牙瓷贴面修复的69例患者(共196个全瓷贴面),进行问卷调查和口腔检查,获取术后护理宣教、日常维护措施及瓷贴面远期状况的原始数据,进行统计学分析。结果前牙瓷贴面修复治疗术后,与医生口头医嘱相比,经护士个性化护理宣教的刷牙评分、牙线使用频率均高于前者,而咬硬物习惯及带颜色饮料饮用习惯上两者无明显差别。修复体远期评估前者较后者存在更多的修复体脱落、崩瓷、继发龋、贴面着色等不良事件发生的情况。结论前牙瓷贴面修复术后护士个性化的护理宣教有利于患者养成更好的日常维护习惯,降低修复体脱落、崩瓷

  13. 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

  14. Malocclusion of teeth

    Science.gov (United States)

    Crowded teeth; Misaligned teeth; Crossbite; Overbite; Underbite; Open bite ... Occlusion refers to the alignment of teeth and the way that the upper and lower teeth fit together (bite). The upper teeth should fit slightly over the lower teeth. ...

  15. Multidisciplinary management of impacted central incisors due to supernumerary teeth and an associated dentigerous cyst

    OpenAIRE

    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. ...

  16. 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

  17. 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

  18. 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。

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

    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。

  20. 陕西地区老年人上前牙色度值的测量分析%Color measurements and analysis of maxillary anterior teeth of elder people in Shaanxi

    Institute of Scientific and Technical Information of China (English)

    谭战民; 李立刚; 李涛

    2012-01-01

    Objective To study the color distribution of maxillary anterior teeth of elder people in Shaanxi. Methods Based on the CIE 1976 L*a*b* color space,the values of L*、a*、b* of 632 maxillary anterior teeth from 119 elder people in Shaanxi were measured by ShadeEye NCC-Ⅱ Digital colorimeter. Results The value of L*、a*、b* of the maxillary central incisors,lateral incisors and canines was 72.63±6.17、-0.68±1.12、17.32±6.59,68.3±4.53±-0.44±1.22±11.79±6.93. And 66.73±.04,0.09±1.38,20.87±0.74, respectively.The value of L*,a*,b* between the male and female was not statistical differences (P>0.05),but there was significant differences among the maxillary central incisors, lateral incisors and canines in terms of L*,a* ,b* (P<0.05).The value of L* of was decreased gradually.while the value of a* was increased according to the order of the maxillary central incisors,lateral incisors and canines.The value of b* the maxillary lateral incisors was the smallest. Conclusion There was no statistical difference in the maxillary anterior teeth between male and female subjects in Shanxi. Among elder people in Shanxi.the maxillary central incisors were the brightest, while the maxillary lateral incisors were the lightest.The maxillary canines were redder and yellower than the incisors.ror teet%目的:研究陕西地区老年人上前牙色度值分布范围,为临床应用提供参考依据.方法:以CIE 1976 L*a*b*色度空间为基础,采用ShadeEye NCC-Ⅱ比色仪对119例陕西地区老年患者的6 32颗上前牙的L*、a*、b*值进行测量分析.结果:老年人上前牙各色度值范围分别为中切牙L*:72.63±6.17,a*:-0.68±1.12,b*:17.32±6.59;侧切牙L*:68.3±6.53,a*:-0.44±1.22,b*:11.79±6.93;尖牙L*:66.73±6.04,a*:0.09±1.38,b*:20.87±5.74.男女同名牙L*、a*、b*值之间无统计学差异(P>0.05).中切牙、侧切牙及尖牙的L*、a*、b*值相互之间均存在显著性差异(P<0.05).中切牙、侧切牙、尖牙的L*值逐渐

  1. 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.

  2. 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.

  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. 微种植体支抗压低上前牙的Typodont实验研究%Typodont experimental study of intruding maxillary anterior teeth by mini-implant

    Institute of Scientific and Technical Information of China (English)

    麦志辉; 艾虹; 卢红飞; 黄晓; 龙湘玲

    2009-01-01

    Objective To study the effect of mini-implant anchorage in different locations on intruding maxillary anterior teeth in Typodont models, and provide reference to clinical treatment Methods 42 standard Typodont models with anterior alveolar vertical excess were made and randomly divided into three groups(14 for each group): Group A: Mini-implants were put between central incisors, Group B: Mini-implants were placed between central and lateral incisors, Group C: Mini-implants were placed between lateral incisor and canine.0.98N force was applied to intrude the maxillary anterior teeth.The amount of intrusion and forward movement were measured by three-dimensional measuring apparatus.The tooth inclination was measured by Software Imageware 12; while the changes of dental arch and occlusive plane were studied by the same software.Results ① in three groups, the amount of intrusion ranged from (0.9220±0.3037)mm to (5.2354±0.9620) mm, central incisor>lateral incisor>canine.The closer position to the middle point of anterior arch for the mini-implants, the intrusive effect was more significant ② All teeth were found to have moved forward and inclined to different extents after being intruded by mini-implants.The closer position to the posterior arch for the mini-implants, the less forward movement and inclination were observed.③ The closer position to the posterior arch for the mini-implants, the less changes were found in dental arch and occlusive plane, and vice versa.Conclusions ① Maxillary anterior teeth can definitely be intruded by mini-implants.② The closer position to the posterior dental arch the mini-implants were placed, the less changes were found in intrution, inclination degree, dental arch and occlusive plane, and vice versa.%目的 在Typodont模型上,模拟临床应用微种植体支抗压低上前牙的过程,研究不同部位支抗对上前牙压低效果的影响.方法 制作上前牙槽骨垂直发育过度的标准Typodont模型42个

  5. Teething Tots

    Science.gov (United States)

    ... the first set of teeth will fall out, tooth decay makes them fall out more quickly, leaving gaps ... brush and floss. Another important tip for preventing tooth decay: Don't let your baby fall asleep with ...

  6. 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.

  7. 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

  8. 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

  9. 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.

  10. 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 .

  11. 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.

  12. 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

  13. 玻璃纤维牙周夹板用于外伤前牙固定的临床研究%F-Splint-Aid Slim fiberglass fixing traumatic anterior teeth

    Institute of Scientific and Technical Information of China (English)

    李素梅; 黄念全; 王淞; 李炎钊; 刘进聪

    2014-01-01

    Objective To understand the effect of F-Splint-Aid Slim fiberglass fixing traumatic anterior teeth and the relationship between it and periodontal health.Methods 50 patients were randomly divided into a dental arch splint treatment group (group A) and a F-Splint-Aid Slim fiberglass treatment group (group B).The treatment effect,periodontal situation,patients' comfort,aesthetics,pain,gum bleeding,etc.during the treatment course were compared between the two groups.Results The success rate was 86.8% in group A and was 98.0% in group B,with a statistical difference (P < 0.05).After the treatment,the periodontal conditions,patients' comfort,and appearance were better in group B than in group A.Conclusions F-Splint-Aid Slim fiberglass is effective for fixing traumatic loose teeth.%目的 了解玻璃纤维牙周夹板用于前牙外伤固定的疗效及其与牙周健康的关系.方法 将50例患者随机分为牙弓夹板治疗组(A组)和玻璃纤维牙周夹板治疗组(B组),对患者治疗后效果,牙周情况和患者对治疗过程中的舒适性、美观性、疼痛以及牙龈出血等的出现情况进行比较.结果 A组治疗成功率86.8%,B组治疗成功率98.0%,差异有统计学意义(P<0.05).治疗后,A组的牙周情况、患者的舒适性、美观性均较B组的差.结论 玻璃纤维牙周夹板是一种固定外伤松动牙齿的有效材料.

  14. 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.

  15. 间接数字化成像技术分析208颗山东地区汉族人恒前牙根管的弯曲情况%Root canal curvature of 208 anterior teeth from Han Chinese people in Shandong Province An indirect digital X-ray radiography analysis

    Institute of Scientific and Technical Information of China (English)

    王玲香; 邓婧; 王大山

    2011-01-01

    BACKGROUND: It can to a certain extent prevent complications during root canal preparation and improve the success rate of root canal therapy by understanding root canal anatomical configuration and bending degree.OBJECTIVE: To investigate the root canal curvature of permanent anterior teeth from Han Chinese people in Shandong province.METHODS: A total of 208 anterior teeth were collected and examined by indirect digital X-ray radiography both from labiolingual and mesiodistal directions,according to Schneider method,the data obtained were analyzed.RESULTS AND CONCLUSION: Most root canals of anterior teeth from Shandong province were typeⅠ,and more than half were curved. The most curvature happened in the apical third. The highest rate of canal curvature occurred in maxillary canines. Except the central incisors,the S-shaped canal was observed on the rest teeth. The radius of mandibular anteriors was obvious longer in labiolingual directions than that in mesiodistal directions. Root canal curvatures of anterior teeth from Shandong province are complex and have a higher bending rate.%背景:熟悉根管解剖形态,了解其弯曲程度,可以在一定程度上预防根管预备时的并发症,提高根管治疗的成功率.目的:了解山东地区汉族人恒前牙根管弯曲的情况.方法:采用间接数字化X射线成像技术,对收集的离体208颗前牙进行颊舌向和近远中向拍摄,采用改良的Schneider测量方法,分析根管弯曲情况.结果与结论:山东地区汉族人前牙根管多为Ⅰ型根管,且半数以上存在弯曲,弯曲部位多集中在根尖1/3,尤以上颌尖牙根管弯曲发生率最高,除上颌中切牙外,其余牙位均有S形弯曲根管,下颌前牙在唇舌方向上弯曲半径明显高于近远中方向.提示山东地区汉族人恒前牙根管形态复杂,弯曲率较高.

  16. Affecting factors for gingival papilla in front of maxillary anterior teeth after operation%天然上前牙(根)术后龈乳头影响因素的探索

    Institute of Scientific and Technical Information of China (English)

    李蓬; 唐志辉; 许卫华; 张毅

    2011-01-01

    Objective: To analyze the factors affecting the gingival papilla in front of maxillary anterior teeth with natural roots, so as to provide proof for clinical therapy. Methods: 46 maxillary anterior papilla of 20 patients underwent flap surgery were studied. In which 26 papilla adjacent to natural intact teeth and 20 to teeth to be restorated. Plaque Index ( PLI ), probing depth ( PD), bleeding index (BI) and papilla index score (PIS) were recorded before surgery. Thickness of gingival papilla were measured with electrical vernier caliper, a standardized periodontal probe with Williams markings was used for measurements fellowing parameters: distance from crest of bone to dental cusp of adjacent tooth (root to be restorated)/distance from crest of bone to contact point( natural intact teeth), mesiodistal distance between two roots at crest level, distance from crest of bone to midlabial point of tooth, buccal- lingual width of crest during surgery. Distance from dental cusp of adjacent tooth to the base contact point. PIS, PLI, PD and BI were measured 6 months after surgery. Relationship between PIS and the clinical parameters were analyzed respectively with Logistic analysis. Results: When the distance from the crest of bone to the base of the contact point was increasing, PIS and the percentage of presence of papilla decreased significantly. Logistic analyze showed, after adjusting PD, BI and PLI, only distance from the crest of bone to the base of the contact point was the significant affecting factor( OR = 0.43, 95% CI 0.184 - 0.99, P = 0.047 ). The volume of papilla in thinner gingival biotype was significantly smaller than the thicker type( 16.8 ±7.63 vs 27.96 ±9.89mm3 ,P <0.001 ). Conclusion: Distance from crest of bone to contact point was the most important factor affecting the gingival papilla, different gingival biotype may affect papilla volume.%目的:明确影响术后天然牙根牙龈龈乳头的主要因素,为临床治疗提供依据.方

  17. 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:

  18. 不翻瓣即刻牙种植对患者口腔软硬组织的影响分析%Effect of immediate dental implant on the oral and soft tissue of patients with anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    方杨

    2016-01-01

    Objective: To study the effect of immediate dental implantation on the oral and soft tissue of the patients with anterior teeth area. Methods: From January 2013 to June 2015 in our hospital for imme-diate dental implant patients (n=30). The digital random were randomly divided into observation group and control group, 15 cases. The patients in the control group were flap in immediate implant in, the observa tion group of flapless immediate dental implantation. The effects of two groups were compared. Results: The survival rate of the observation group was 93.33%(14/15), significantly higher than that in the control group of 86.67%(13/15). The incidence of postoperative symptoms was significantly lower than that of the control group. Observation group, operation time and alveolar bone status were signifi-cantly lower than those of the control group, two groups of vas before treatment, PES score compared to no difference, respectively after the treatment, the observation group VAS score was significantly lower than that of the control group, and PES score was significantly higher than that of control group. After 1 years of operation, the crest crest absorption of the observation group was (0.71 ±0.15)mm, was signifi-cantly lower than that of the control group(1.13±0.32)mm. The difference was statistically significant (all P<0.05). Conclusion: The immediate dental implantation in the anterior teeth area of the maxillary an-terior teeth is significant, which can reduce postoperative pain, reduce the incidence of edema, and can relieve the pain and safety of the patients, which is worthy of clinical application.%目的:研究不翻瓣即刻牙种植对患者口腔软硬组织的影响并进行分析。方法:选取从2013年1月至2015年6月,于我院进行即刻牙种植患者30例。以数字法随机随机分为观察组及对照组各15例。其中对照组患者进行翻瓣即刻牙种植术,观察组则进行不翻瓣即刻牙种植术,对比两组

  19. 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.

  20. 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

  1. 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”。

  2. 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.

  3. 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.

  4. 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

  5. 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.

  6. Teeth Injuries (For Parents)

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy First Aid: Teeth Injuries KidsHealth > For Parents > First Aid: Teeth Injuries ... or young child injures the gums or baby teeth: Apply pressure to the area (if it's bleeding) ...

  7. 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

  8. 微型种植体在前牙牙列缺损种植修复中的应用%Application of microimplants in the restoration of dentition defect in anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    徐莉亚; 胡劲松; 李春林

    2015-01-01

    Objective To evaluate clinical effects of restorations in anterior teeth area with the microimplants and compare the effects between microimplant supported fixed dentures, removable partial dentures and porcelain-fused-to-metal(PFM) fixed bridges. Methods From January 2012 to December 2014, 26 cases of patients were selected as the experimental group in Guiyang Stomatological Hospital. Experiment group:The sample consisted of 26 consecutively treated partially edentulous patients who had a total of 30 microimplants, which were 2.3mm or 2.8mm in diameter and placed in 3.5-5mm edentulous space.The final restorations were fabricated with zirconia all ceramic crow 3 months later.All implants were examined clinically and radiologically in 3 months, 6 months,12 months and 24 months respectively.Another 48 cases of patients were selected as control group in the same period in the rehabilitation department of the hospital.Control group:A sample consisted of 48 patients who had a single missing tooth in the anterio teeth area.24 patients were treated with removable partial dentures(RPDs). 24 patients were treated with PFM fixed bridges. After the denture completion, the satisfaction survey to the patients was made about the aesthetic results, mastication, retention and comfort. Results Two loosing implants were removed, the remaining implants were successfully fabricated with crows.Bone level surrounding the implant is highly stable. Appearance of restorations had a good effect.The patients were satisfied with the microimplant supported fixed dentures.The satisfaction of patients with implant fixed dentures and PFM fixed bridges were higher than the patients with RPDs in aesthetic results, mastication, retention and comfort(P<0.05). The satisfaction of patients with implant fixed dentures was higher than the patients treated with PFM bridges in the comfort. No obvious differences were observed about aesthetic results, mastication, retention satisfaction among implant fixed

  9. 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.

  10. The histological effects of composite resin materials on the pulps of monkey teeth.

    Science.gov (United States)

    Heys, R J; Heys, D R; Cox, C F; Avery, J K

    1977-03-01

    Pulpal response of three bis glycol methacrylate composite resins, Smile, Simulate and Experimental Composite no. 2 were tested on primary and permanent monkey teeth using zinc oxide eugenol (ZOE) and silicate as controls. All materials were placed in Class V cavity preparations in Rhesus monkey teeth and evaluated at 3 days and 5 and 8 weeks. The materials were randomly placed in anterior and posterior teeth utilizing 75 primary and 75 permanent teeth. Following perfusion the teeth were prepared by routine histological procedures. The 3 day response of the composite resins was moderate, characterized by disruption of the odontoblasts, vacuolization and mild inflammatory response underlying the cavity. At 5 weeks the formation of reparative dentin and a decrease in the inflammatory response was similar for all resins observed. At 8 weeks a slight increase in reparative dentin and continued decrease in inflammation was noted when compared to the 5 weeks responses. At all time intervals ZOE produced the least pulpal response while silicate produced the most severe response.

  11. Management of Multiple Impacted Teeth: A Case Report and Review

    Science.gov (United States)

    Ajith, Sreedevi D; Shetty, Smitha; Hussain, Huma; Nagaraj, Tejavathy; Srinath, M

    2014-01-01

    Interdisciplinary care for the management of impacted teeth provides a holistic method of treating patients. Careful planning is necessary to reach the desired treatment goals. This article attempts to highlight the importance of diagnosis and adequate treatment planning for successful eruption of impacted teeth. The concept of forced eruption to improve the bone morphology of the impacted teeth has been used to treat a case of multiple impacted teeth. This paper reviews the diagnosis and management of impacted teeth. A case report of multiple impacted maxillary anterior teeth of a 13-year-old female patient has been presented. How to cite the article: Ajith SD, Shetty S, Hussain H, Nagaraj T, Srinath M. Management of multiple impacted teeth: A case report and review. J Int Oral Health 2014;6(3):93-8. PMID:25083041

  12. Dentulous Appliance for Upper Anterior Edentulous Span

    OpenAIRE

    Chalakkal, Paul; Devi, Ramisetty Sabitha; Srinivas, G Vijay; Venkataramana, Pammi

    2013-01-01

    This article discusses about a fixed dentulous appliance that was constructed to replace the primary upper anterior edentulous span in a four year old girl. It constituted a design, whereby the maxillary primary second molars were used to support the appliance through bands and a wire that contained an acrylic flange bearing trimmed acrylic teeth, anteriorly. The appliance was functionally and aesthetically compliant.

  13. [A Rare Case of Neonatal Teeth].

    Science.gov (United States)

    Martins, Andreia A; Ferraz, Cláudia; Vaz, Rute

    2015-01-01

    Neonatal teeth is a rare disorder of tooth eruption, arising in the oral cavity, usually in the anterior mandible, in the first month of life. Its etiology is unknown. This condition can cause breastfeeding difficulties, besides aspiration or swallowing of the teeth. We describe the case of a premature infant in the second day of life presented with gingival edema, redness and discrete swelling in the region of the mandibular central incisors. Ten days later, two small teeth with hypermobility were detected. Extraction of those teeth was performed. With this clinical case we intend to show the rarity of this entity, especially in premature infants, the possible association with various syndromes and the need for a multifactorial approach to the treatment decision (extraction / conservative treatment). PMID:26849764

  14. Cervicoplastia anterior Anterior cervicoplasty

    Directory of Open Access Journals (Sweden)

    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

  15. Posterior neonatal teeth

    Directory of Open Access Journals (Sweden)

    A Kumar

    2011-01-01

    Full Text Available Teeth which are present in the oral cavity of newborn infant at the time of birth are called "natal teeth" and which erupts in first month of postnatal life are called as "neonatal teeth." The incidence of these teeth is 1 in 2000 to 1 in 3500 live birth. The most common natal teeth reported are mandibular central incisors followed by maxillary incisors and mandibular canine. The natal or neonatal tooth in maxillary molar region is a rare occurrence. This article represents a rare case of bilateral neonatal maxillary molar teeth.

  16. 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.

  17. 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.

  18. 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.

  19. 数字化快速成型种植导板在上前牙区种植的临床应用研究%Application of digital rapid process implant template in implant surgery of maxillary anterior teeth area

    Institute of Scientific and Technical Information of China (English)

    时光辉; 任春富; 杨中锐; 朱永翠; 翟蕾

    2013-01-01

    目的:评价数字化快速成型种植导板在上前牙区种植的临床应用效果。方法对2010年4月至2012年6月在河南大学第一附属医院口腔科就诊的6例上前牙缺失患者,拍摄螺旋CT及常规取超硬石膏模型,经过三维重建、模拟种植及数字化快速成型技术制作导板后,将该导板应用于手术中。术后再次拍摄螺旋CT并与术前的情况进行对比。结果6例患者均应用该导板完成手术,手术效果满意。患者术后反应轻微,植入后3~6个月均顺利完成冠部修复,美观效果良好。经过术前、术后CT结果对比,种植体颈部的偏移为(0.71±0.17)mm,根部的偏移为(0.85±0.19)mm。结论数字化快速成型种植导板应用于上前牙种植,具有明显的技术优势与广阔的应用前景。%Objective To evaluate the effect of the application of digital rapid process implant template in implant sur-gery of maxillary anterior teeth area. Methods Totally six patients with maxillary anterior teeth missing who need im-plant surgery were collected and the implant template was made by digital rapid process technology and was used in im-plant surgery. Then the deviations of the implant body were measured. Results The surgery process was satisfactory. Slight postoperative reaction was observed,and 3-6 months after implant crown repair was successfully completed. In CT image the deviation of the neck and apical of the implant body was(0.71±0.17)mm and(0.85±0.19)mm,respectively. Conclusion The digital rapid process implant template is a very effective method in implant surgery of maxillary anteri-or teeth area.

  20. 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...

  1. Anterior-posterior and lateral hemispheric alterations in cortical glucose utilization in Alzheimer's disease

    Energy Technology Data Exchange (ETDEWEB)

    Friedland, T.F.; Budinger, T.F.; Jaqust, W.J.; Yano, Y.; Huesman, R.H.; Knittel, B.; Koss, E.; Ober, B.A.

    1984-01-01

    The anatomical and chemical features of Alzheimer's disease (AD) are not distributed evenly throughout the brain. However, the nature of this focality has not been well established in vivo. Dynamic studies using the Donner 280-Crystal Positron Tomograph with (F-18)2-fluorodeoxyglucose were performed in 17 subjects meeting current research criteria for AD, and in 7 healthy age-matched control subjects. Glucose metabolic rates in the temporal-parietal cortex are 27% lower in AD than in controls. Ratios of activity density reveal consistently lower metabolic rates in temporal-parietal than frontal cortex in the AD group, while healthy aged subjects have equal metabolic rates in the two areas. Similar findings have been reported by other laboratories. A major finding is a striking lateral asymmetry of cortical metabolism in AD which does not favor either hemisphere. (The asymmetry is 13% in the AD group, 3% in controls, p<.005.) This has not been previously reported in AD. The consistency with which anterior-posterior metabolic differences are found in AD suggests that the focality of the metabolic changes may be used to develop a noninvasive diagnostic test for the disorder. The metabolic asymmetry in AD may be compared to the clinical and pathological asymmetry found in Creutzfeldt-Jakob disease, and may represent an additional link between AD and the subacute spongiform encephalopathies.

  2. Brushing your infant's teeth

    Science.gov (United States)

    ... gov/ency/patientinstructions/000769.htm Brushing Your Child’s Teeth To use the sharing features on this page, ... how to brush their teeth on their own. Tooth and Gum Care for Young Children You should ...

  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 in between the ages ... the “Age of Wisdom.” What Is an Impacted Tooth? When a tooth is unable to fully enter ...

  4. Impacted wisdom teeth

    OpenAIRE

    Dodson, Thomas B.; Susarla, Srinivas M.

    2010-01-01

    Impacted wisdom teeth occur because of a lack of space, obstruction, or abnormal position. They can cause pain, swelling, and infection, and may destroy adjacent teeth and bone.The incidence of impacted wisdom teeth is high, with some 72% of Swedish people aged 20 to 30 years having at least one impacted third molar.

  5. 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.

  6. 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

  7. 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.

  8. 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.

  9. 纤维根管桩根管内固定联合复合树脂粘接修复儿童前牙冠根联合折%Fibrous root canal dowel internal fixation combined with composite resin adhesion in treatment of crown-root fracture of anterior teeth in children

    Institute of Scientific and Technical Information of China (English)

    汪隼; 曹慧珍

    2012-01-01

    Objective To investigate the clinical effect of fibrous root canal dowel internal fixation combined with composite resin adhesion in treatment of crown-root fracture of anterior teeth in children. Methods Eleven children (11 teeth) aged 11 to 14 with crown-root fracture caused by trauma of upper mandible medial incisor were selected. All were horizontal fracture or oblique fracture, and there was no longitudinal fracture and alveolar bone fracture. Patients received one-visit endodontics treatment after external fixation of the injured teeth, and were follow up for one week. The crown-root broken ends were restored with fibrous root canal dowel internal fixation combined with composite resin adhesion. Results Nine teeth were successfully restored, and were cosmetically and functionally resumed in short term. One patient failed due to lower palatal fracture line, with more wound hemorrhage and exudation. And the other patient failed due to consumption of hard food, which led to the loose broken ends. Conclusion Fibrous root canal dowel internal fixation combined with composite resin adhesion may be an ideal temporary restoration method in treatment of crown-root fracture of anterior teeth in children, which can resume cosmetics and function in short term and decrease loss in dental and periodontal tissues to the full extent.%目的 观察纤维根管桩根管内固定联合复合树脂粘接对儿童前牙冠根联合折的修复效果.方法 上颌中切牙外伤致冠根联合折断的患者11例(患牙11颗),年龄11 ~ 14岁,均为横折或斜折,无纵折,无牙槽骨骨折;就诊予以断牙外固定后即刻行一次性根管治疗,观察1周;采用纤维根管桩根管内固定加冠根断端复合树脂粘接的方法进行断端自体牙修复.结果 11颗患牙中,9例治疗成功,短期内恢复美观和功能,效果满意;失败2例,其中1例为腭侧折断,折断线较低,出血、渗出较多;另1例患儿未遵医嘱食用硬物

  10. 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

  11. A multi-faceted treatment approach for anterior reconstructions using current ceramics, implants, and adhesive systems.

    Science.gov (United States)

    Hajtó, Jan; Gehringer, Uwe; Ozcan, Mutlu

    2010-01-01

    Of all developments in dental technology, fulfilling the esthetic and functional demands of the patient, especially regarding anterior reconstructions, is still a challenge for both dentists and dental technicians. This becomes more difficult for patients with a previous treatment history that is not ideal. This case presentation demonstrates reconstruction of an anterior zirconia resin-bonded fixed dental prosthesis (RBFDP) for the mandible with a combined approach utilizing veneers for harmonized space distribution on the abutment teeth and an implant-supported zirconia fixed dental prosthesis in the anterior segment of the maxilla. Adhesive cementation of the restorations is also presented in a step-by-step approach based on the current state of the art.

  12. Natal teeth: a review.

    Science.gov (United States)

    Leung, Alexander K C; Robson, William Lane M

    2006-02-01

    The incidence of natal teeth is approximately 1:2,000 to 1:3,000 live births. The most commonly affected teeth are the lower primary central incisors. Natal teeth usually occur in pairs. The eruption of more than two natal teeth is rare. The majority of natal teeth represent the early eruption of normal primary deciduous dentition. Less than 10% of natal teeth are supernumerary. Natal teeth might resemble normal primary dentition in size and shape; however, the teeth are often smaller, conical and yellowish, and have hypoplastic enamel and dentin with poor or absent root formation. Complications include discomfort during suckling, sublingual ulceration, laceration of the mother's breasts and aspiration of the teeth. A dental roentgenogram is indicated to differentiate the premature eruption of a primary tooth from a supernumerary tooth. Tooth extraction is indicated if the tooth is supernumerary or excessively mobile. If the tooth does not interfere with breastfeeding and is otherwise asymptomatic, no treatment is necessary. PMID:16708508

  13. 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。

  14. 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.

  15. Evaluation of crown mesiodistal diameter of permanent teeth

    Directory of Open Access Journals (Sweden)

    H. Ravanmehr

    1994-06-01

    Full Text Available The aim of this study was to evaluate mesiodistal diameter of permanent teeth and evaluating it's distribution in Iran. In current study, 850 plastery impressions or 16590 teeth were precisely measured by a digital coulis with 0.01 mm accuracy.The obtained measures of the permanent teeth are shown in table 1. Table (4 demonstrates the symmetry of left and right maxillary and mandibular teeth. Obtainedmeasurements in Table 1 were compared with Gran's measures (Table 2 which are shown in Table (3.Bolton analysis was done and results were found close to the BolType text or a website address or translate a document.ton measures. It was concluded that it is better to replace measurements of our society instead of Bolton's. Since we found minor difference with the measures of other researchers, especially for teeth anterior to first molar, using our measures in treatment plans would not bring about any problem.

  16. 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...

  17. 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).

  18. Two cases with supernumerary teeth in lower incisor region.

    Science.gov (United States)

    Yokose, Taishi; Sakamoto, Teruo; Sueishi, Kenji; Yatabe, Kenichi; Tsujino, Keiichirou; Kubo, Shuhei; Yakushiji, Masashi; Yamaguchi, Hideharu

    2006-02-01

    Abnormalities in number of teeth are occasionally noted in clinical cases. Many theories have been proposed as regards the causes of the occurrence of supernumerary teeth, including atavism theory, mechanical tooth germ separation theory, tissue induction theory, and dental laminar morphological disturbance theory. However, none of these theories alone offers a sufficient explanation for this phenomenon. The incidence of supernumerary permanent teeth is approximately 1-3%. These are the maxillary anterior teeth, the maxillary molars, and the maxillo-mandibular premolars in terms of descending order of site of occurrence. On the other hand, incidence in the mandibular anterior tooth area, of which there have been few detailed reports, is about 0.01%, a markedly low value. In this paper, we report two rare cases of supernumerary teeth in the mandibular incisor area. We discuss their etiology and orthodontic treatment, and detail a differential diagnosis between the normal and supernumerary teeth. We found that it was difficult to establish a clear etiology and differentiation between the normal and supernumerary teeth. PMID:16924155

  19. [Cryopreservation of teeth].

    Science.gov (United States)

    Zimmerli, Melanie; Filippi, Andreas

    2010-01-01

    After tooth loss dental implants or fixed prosthetic restorations are not indicated in children and adolescents due to incomplete maxillary and mandibular development. Cryopreservation is a method for long-term storage of healthy teeth which were removed for orthodontic reasons or due to traumatic origin. These preserved teeth can be used as autogenous replants or transplants after tooth loss. During transport to and from the freezing facilities prior to freezing the teeth are stored in a cell culture medium. The tooth is transferred into a freezing tube containing cell culture medium and cryoprotectant DMSO. Teeth autotransplanted after cryopreservation show vitality of the PDL cells. Usually no enamel and/or dentinal cracks can be observed. After tooth loss transplantation of cryopreserved teeth could be an effective and biological therapy for tooth replacement. PMID:21545030

  20. [Natal and neonatal teeth].

    Science.gov (United States)

    Baumgart, Manuela; Lussi, Adrian

    2006-01-01

    Natal teeth have been defined as teeth which are present at birth, while neonatal teeth erupt during the first 30 days. Their occurrence is rare, the prevalence ranges from 1:2000 to 1:3000 with a higher frequency in the lip and palate clefts and syndroms. In about 85% natal or neonatal teeth are lower central incisors (60% in pairs), rare are upper teeth, molars and multiple teeth. In almost 90% they are part of the deciduous dentition. A lot of possible causes of early eruption are discussed, but only the relation to hereditary factors seems to be evident. An autosomal dominant trait is often described. The appearance of these teeth is dependent on the degree of maturity, but most of the time it is loose, small, discoloured and hypoplastic. Histologically, enamel hypoplasia with normal prism structure is apparent. No significant disturbances of the dentin structures are observed, only cervically dentin becomes atubular with spaces and enclosed cells. A large vascular pulp and failure of root formation are further investigations. Our microhardness measurements showed values from 24.3-32.4 KHN for enamel and 48.3-62.2 KHN for dentin, while normal deciduous teeth have an enamel hardness of 322.0 +/- 17.5 KHN. The thickness of enamel was never more than 280 microm compared to up to 1200 microm in normal teeth. This shows the retarded development of natal and neonatal teeth, because mineralization has not finished at the time of birth. In accordance with developmental age tooth structure and appearence are normal. In consideration of complications as Riga-Fede-disease, feeding problems, possibility of infection and hypermobility most of the time extraction is the treatment of choice, but in the interest of protecting the child this decision should be made carefully. PMID:17051960

  1. Mouth and Teeth (For Parents)

    Science.gov (United States)

    ... Things to Know About Zika & Pregnancy Mouth and Teeth KidsHealth > For Parents > Mouth and Teeth Print A ... lives. continue Basic Anatomy of the Mouth and Teeth The entrance to the digestive tract, the mouth ...

  2. 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.

  3. Anterior dental microwear texture analysis of the Krapina Neandertals

    Science.gov (United States)

    Krueger, Kristin; Ungar, Peter

    2012-12-01

    Some Neandertal anterior teeth show unusual and excessive gross wear, commonly explained by non-dietary anterior tooth use, or using the anterior dentition as a tool, clamp, or third hand. This alternate use is inferred from aboriginal arctic populations, who used their front teeth in this manner. Here we examine anterior dental microwear textures of the Krapina Neandertals to test this hypothesis and further analyze tooth use in these hominins. Microwear textures from 17 Krapina Dental People were collected by white-light confocal profilometry using a 100x objective lens. Four adjacent scans were generated, totaling an area of 204x276 μm, and were analyzed using Toothfrax and SFrax SSFA software packages. The Neandertals were compared to six bioarchaeological/ethnographic samples with reported variation in diet, abrasive load, and non-dietary anterior tooth use. Results indicate that Krapina anterior teeth lack extreme microwear textures expected of hominins exposed to heavy abrasives or those that regularly generated high stresses associated with intense use of the front teeth as tools. Krapina hominins have microwear attributes in common with Coast Tsimshian, Aleut, and Puye Pueblo samples. Collectively, this suggests that the Krapina Neandertals faced moderate abrasive loads and only periodically used their anterior teeth as tools for non-diet related behaviors.

  4. Effect of passive self-ligating bracket placement on the posterior teeth on reduction of frictional force in sliding mechanics

    OpenAIRE

    Kim, Kyu-Ry; Baek, Seung-Hak

    2016-01-01

    Objective The purpose of this study was to investigate the static (SFF) and kinetic frictional forces (KFF) in sliding mechanics of hybrid bracket systems that involve placing a conventional bracket (CB) or active self-ligating bracket (ASLB) on the maxillary anterior teeth (MXAT) and a passive SLB (PSLB) on the maxillary posterior teeth (MXPT). Methods The samples consisted of two thoroughbred types (group 1, anterior-CB + posterior-CB; group 2, anterior-ASLB + posterior-ASLB) and four hybri...

  5. Restoring Anterior Aesthetics by a Rotational Path Cast Partial Denture: An Overlooked Technique.

    Science.gov (United States)

    Sharma, Deeksha; Bhat, Bala Saraswati; Arora, Himanshu

    2016-05-01

    Cast Partial Dentures (CPD) has long been known to restore missing teeth in patients with minimal invasion on hard and soft tissues. Although satisfactory otherwise, the main concern in CPD is the anterior display of metal. Also the technique sensitive lab procedures, together with the esthetic concern have built an iceberg around the frequent utilization of this treatment modality. With the advent of various techniques to get rid of the metallic display, it was predicted to have more CPD's done in the dental arena. But the conceptual technicalities of the procedure took away the limelight from this treatment modality and focused on the fixed prosthodontics. Although feasible in a large number of patients, fixed prosthesis still has areas of restriction. It is here, when we apply our knowledge and skill of esthetic CPD. Esthetic CPD eliminates the metal display by utilizing desirable undercuts. The engaging action of the framework into these undercuts paves way for a rotational motion to seat the remaining prosthesis. Hence dual path of insertion helps eliminating the anterior clasp. In this case report dual path of insertion is discussed for replacing anterior teeth in an old male patient who had mild esthetic concerns. Following the conservative approach of CPD (over FPD) esthetic and restorative treatment was planned with patient's consent. PMID:27437375

  6. 疑难根管再治疗中显微超声技术的临床应用%Root canal treatment of complicated anterior teeth with dental operating microscope and ultrasonic instru-ments

    Institute of Scientific and Technical Information of China (English)

    周艳; 秦念红; 徐铁华; 林爱娟

    2014-01-01

    目的:评价显微超声技术在疑难根管再治疗中的应用。方法:选取需要根管再治疗的前牙56颗,62个根管,在根管显微镜下,采用超声根管锉,顺利疏通根管后,常规完成根管预备和根管充填,观察并评价临床疗效。结果:62个根管中,疏通了21个钙化根管,取根管内断械6个,去除根管桩7个,寻找遗漏根管11个,修补根管侧壁穿孔6个,发现根管内吸收1个,根尖封闭10个,成功完成56颗患牙(62个根管)再治疗。结论:显微超声技术在疑难根管再治疗中可以提供有效的治疗手段,提高临床治疗成功率。%Objective:To evaluate the effect of dental operating microscope(DOM) and ultrasonic instruments in the management of complicated root canals. Method:56 teeth (62 root canals)that had been treated with convention repaired before were selected for root canal therapy. The root canal of all cases were retreated with ultrasonic instruments under den-tal operating microscope. The efficient of preparation and obturation was analyzed before and after treatment. Result:The 21 calcified root canals,6 canals blocked by instrument fragments,7 canals blocked by post,11 misunderstood root canals,6 canals side hole,1 root canal absorb inside,10 canals with open canal system were retreated successfully. Conclusion:The use of dental operating microscope and ultrasonic instruments is proved effective in complicated tooth root canal retreatment.

  7. 磨牙区多生牙3例%Supernumerary teeth located in molar region: Three cases report

    Institute of Scientific and Technical Information of China (English)

    戴杰; 杨卫江; 沈宣江

    2011-01-01

    多生牙是一种牙齿数目多于人体生理牙数的牙齿发育异常,多见于上颌前牙区,而磨牙区少见.本文报道3例磨牙区多生牙病例.%Supernumerary teeth is one of the teeth dysplasia that the number of teeth exceeded normal. Most of supernumerary teeth reported were located in anterior teeth region, but rare cases were reported in molar region. This paper reported three eases that supernumerary teeth located in molar region.

  8. Syndromes with supernumerary teeth.

    Science.gov (United States)

    Lubinsky, Mark; Kantaputra, Piranit Nik

    2016-10-01

    While most supernumerary teeth are idiopathic, they can be associated with a number of Mendelian syndromes. However, this can also be a coincidental finding, since supernumerary teeth occur in 6% or more of the normal population. To better define this relationship, we analyzed the evidence for specific associations. We excluded conditions with a single affected patient reported, supernumerary teeth adjacent to clefts or other forms of alveolar disruption (as secondary rather than primary findings), and natal teeth, which can involve premature eruption of a normal tooth. Since, the cause of supernumerary teeth shows considerable heterogeneity, certain findings are less likely to be coincidental, such as five or more supernumerary teeth in a single patient, or locations outside of the premaxilla. We found only eight genetic syndromes with strong evidence for an association: cleidocranial dysplasia; familial adenomatous polyposis; trichorhinophalangeal syndrome, type I; Rubinstein-Taybi syndrome; Nance-Horan syndrome; Opitz BBB/G syndrome; oculofaciocardiodental syndrome; and autosomal dominant Robinow syndrome. There is also suggestive evidence of an association with two uncommon disorders, Kreiborg-Pakistani syndrome (craniosynostosis and dental anomalies), and insulin-resistant diabetes mellitus with acanthosisnigricans. An association of a Mendelian disorder with a low frequency manifestation of supernumerary teeth is difficult to exclude without large numbers, but several commonly cited syndromes lacked evidence for clear association, including Hallermann-Streiff syndrome, Fabry disease, Ehlers-Danlos syndrome, Apert and Crouzon syndromes, Zimmermann-Laband syndrome, and Ellis-van Creveld syndrome. © 2016 Wiley Periodicals, Inc. PMID:27250821

  9. 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.

  10. 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

  11. 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

  12. 两种粘结剂用于活髓前牙缺损修复的临床效果%Clinical study of self-etching and total-etching systems for esthetic restoration of anterior teeth with vital pulp

    Institute of Scientific and Technical Information of China (English)

    朱轶萍; 秦云

    2012-01-01

    目的 比较两种粘结剂Adper Single Bond2和Xeno Ⅲ用于活髓前牙牙体缺损复合树脂充填修复的术后敏感情况及充填修复效果.方法 124颗患牙随机分为两组,全酸蚀组使用酸蚀剂、Adper Single Bond 2行复合树脂充填,自酸蚀组使用Xeno Ⅲ行复合树脂充填,术后1、7、30d复诊,评价术后敏感发生率;1年后复诊,评价充填修复效果.结果 术后1d,自酸蚀组敏感率明显低于全酸蚀组,差异有统计学意义(x2=6.105,P=0.047);术后7d(x2=2.667,P=0.264)、30 d(x2 =1.177P=0.555),两组敏感率差异无统计学意义.1年后自酸蚀组充填修复的成功率明显高于全酸蚀组,差异有统计学意义(x2 =4.459,p=0.035).结论 自酸蚀粘结剂Xeno Ⅲ术后敏感度低;术后1年,Xeno Ⅲ的粘结充填修复效果优于Adper Single Bond 2.%Objective To evaluate the postoperative sensitivity and therapeutic effect of a self-etching system and a total-etching system in anterior teeth restorations. Methods One hundred and twenty-four anterior teeth with vital pulp that needed to be restored wete divided into two groups randomly. Adper Single Bond 2 and Xeno 、Ⅲ were applied respectively in each group. After restoration, the sensitivity of teeth was evaluated at 1 d, 7 d, 30 d, and the ratios of success were investigated 1 year later. Results The ratios of postoperative sensitivity of Xeno Ⅲ group was lower than that of Adper Single Bond 2 group at 1 day, however, no significant differences were seen at 7 days, 30 days. The successful effective rate of Xeno Ⅲ group was higher than that of Adper Single Bond 2 group statistically. Conclusion Using self-etching primer is an effective way to reduce postoperative sensitivity, and through the long term observation, Xeno Ⅲ has better bonding effect than Adper Single Bond 2.

  13. 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

  14. 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

  15. 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.

  16. About Kids' Teeth

    Science.gov (United States)

    ... for tooth decay and gum disease. Good oral hygiene is especially important for people wearing braces. And ... bottle pool around the teeth while the child sleeps. Bacteria in the mouth use these sugars as ...

  17. Malocclusion of teeth

    Science.gov (United States)

    ... are easier to clean and decrease risk of tooth decay and periodontal diseases ( gingivitis or periodontitis ). Eliminate strain ... braces and may permanently mark teeth or cause tooth decay if not properly cared for. You will need ...

  18. A Spectrophotometric Color Evaluation of Natural Teeth and Gingival

    DEFF Research Database (Denmark)

    Peng, Min; Hosseini, Mandana; Gotfredsen, Klaus

    2012-01-01

    Objectives: The aim of the present study was to evaluate the color of natural teeth and gingival in anterior maxillary using a new spectrophotometer. Materials and Methods: Thirty four patients with 52 healthy natural teeth and gingival in anterior maxillary were recruited. The color at four...... positions of each tooth (incisal 1/3, body1/3, cervical 1/3 and gingival) were assessed using a spectrophotometer (SpectroShadeTM, Micro Dental, Seria No. HDL3214, MHT, S.p.A, Italy) in CIELab coordinates. Descriptive statistics of Spss17.0 was used to analyze the distribution of color coordinates. Pearson...... correlation was used to test the relationship between the coordinates and age. Independent t test was used to test the difference between gender groups. Results: All the color coordinates for teeth and gingival were in right-left symmetric distribution by the central incisors and the distribution was in same...

  19. Taking Care of Your Teeth

    Science.gov (United States)

    ... teeth are important in many ways. If you take care of them, they'll help take care of you. Strong, healthy teeth help you chew ... have some baby teeth? If you don't take care of your teeth, cavities and unhealthy gums will ...

  20. To compare the stability of stainless mini-implants retracting maxillary anterior teeth in two different implanted sites%不锈钢种植钉支抗内收上颌前牙时两种植入部位稳定性的比较

    Institute of Scientific and Technical Information of China (English)

    彭绍斌; 文民; 程超; 裘军; 秦韶宏; 金树人

    2015-01-01

    Objective To compare the stability of stainless mini-implants retracting maxillary anterior teeth in two different implanted sites.Methods 72 patients (28 males,44 females) of maxillary protrusion were selected to retract anterior teeth with stainless mini-implants anchorage.14 males and 22 females were bucally implanted between maxillary second premolar and first molar.The other 14 male and 22 female were bucally implanted between first and second molars.The failure rates of mini-implants in two different implanted sites were compared.Results Group of implants bucally located between maxillary second premolar had a 23.38% failure rate.Group of implants bucally located between maxillary first and second molars had a 6.74% failure rate.The difference was statistically significant(P=0.002).Conclusions The stability of stainless mini-implants anchorage between maxillary first and second molars,is better than that of bucally located implants between maxillary seond premolar and first molar.%目的 比较使用不锈钢种植钉支抗内收上颌前牙时,两种不同植入部位种植钉的稳定性.方法 选取因上颌前突而行拔牙矫治的患者72例,其中男性28例,女性44例,均使用不锈钢种植钉支抗技术内收上颌前牙.对其中14例男性、22例女性患者于上颌5、6间颊侧植入种植钉,对另14例男性、22例女性患者于6、7间颊侧植入种植钉.比较两种不同植入部位种植钉的松动率.结果 两种不同植入部位种植钉松动率的比较,位于上颌5、6间颊侧植入组,松动率为23.38%,位于6、7间颊侧植入组,松动率为6.74%,前者松动率高于后者,其差异有统计学意义(P=0.002).结论 使用不锈钢种植钉支抗内收上颌前牙时,植入于上颌6、7间颊侧,种植钉稳定性优于植入于上颌5、6间颊侧.

  1. 玻璃纤维桩经表面喷砂后修复上前牙缺损的随访观察%Effect of surface sandblasting of the glass-fiber post on the restoration of upper anterior teeth

    Institute of Scientific and Technical Information of China (English)

    翁志强; 毛钊; 徐辉; 金磊; 唐成忠; 李益材; 严晓东; 冷旭

    2011-01-01

    目的 良好的固位是纤维桩修复成功的关键之一,有研究指出表面喷砂处理可提高纤维桩的固位力,文中探讨玻璃纤维桩表面喷砂处理后修复上前牙牙体缺损的临床疗效.方法 选择上前牙牙体严重缺损需行桩冠修复的患者132例共计156颗牙,随机分为2组,A组82牙为喷砂组,采用表面经过70μm/0.2MPa条件下Al2O3喷砂处理后的纤维桩进行桩冠修复;B组74牙为对照组,用未经喷砂处理的纤维桩修复.2组分别同时进行3个月至3年的临床随访观察.结果 2组桩脱落的发生率存在显著性差异(P<0.05),而桩折断的发生率未见有显著差别(P>0.05);运用Kaplan-Meirer生存曲线和log-rank检验揭示2组间纤维桩脱落的Kaplan-Meirer生存曲线差异有统计学意义(P<0.05),而2组间桩折断的生存曲线未发现显著差异(P>0.05).结论 用Al2O3 在70μm/0.2MPa条件下对纤维桩表面进行喷砂处理后,可提高固位力,延长桩的使用时间,而对桩的强度影响较小.%Objective Retention of the fiber post is one of the key issues to successful restoration. Recently some studies found that surface sandblasting might improve the binding strength of resin composite to fiber posts. This study was designed to evaluate the clinical effect of surface sandblasting on the retention of the glass-fiber post in restoring upper anterior teeth. Methods A total of 132 patients (156 anterior teeth) were chosen and randomly divided into 2 groups. Group A ( N = 82) was restored with glass-fiber posts sandblasting with Al2 O3, under the condition of 70 μ m/0. 2 MPa , group B ( N = 74) was treated without surface sandblasting ( the control group). FoUow-up observations were done every 3 months to 3 years after the post and core restorations had been finished. Results By X2 analysis, the difference of dislocation rate was significant statistically between the 2 groups (P < 0. 05) , while the fracture rate was not different

  2. 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。

  3. 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.

  4. Estimating Gear Teeth Stiffness

    OpenAIRE

    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 ...

  5. 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

  6. Intracoronal bleaching of discolored non-vital teeth using laser irradiation: a case report

    Science.gov (United States)

    Marchesan, Melissa A.; de Castro, Fabiana C.; Matarazzo, Alexandre T.; Pecora, Jesus D.; Zanin, Fatima A.; Brugnera, Aldo, Jr.

    2004-09-01

    Dissemination of blood into the dentinal tubules caused by pulp extirpation or traumatically induced internal pulp bleeding is a possible cause of discoloration of non-vital teeth. Discolored teeth, especially in the anterior region, can result in considerable cosmetic impairment. The whitening of these teeth is an alternative therapeutic method that is relatively non-invasive and conserves dental hard tissue. Recently, intracoronal bleaching of pulpless discolored teeth can be performed with the association of laser irradiation to hydrogen and carbamide peroxide and can even be accomplished in one session. This report shows a clinical case of an endodontically treated tooth submitted to bleaching using LED light and infrared LLLT therapy.

  7. Impacted Teeth and Mandibular Fracture

    OpenAIRE

    Metin, Murat; Şener, İsmail; Tek, Mustafa

    2007-01-01

    Objectives In this retrospective study, we measured the relationship between the presences of impacted or unerupted teeth in the mandible and mandibular fractures. Methods The records and radiographs of 41 patients with mandibular fracture associated with impacted or unerupted teeth were examined. The presence of impacted or unerupted teeth were assessed for each patient and related to the occurrence of fractures of mandible. Results Patients with fracture in the impacted or unerupted teeth a...

  8. 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.

  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. Fracture resistance of maxillary anterior teeth with flared root canals restored with fiber posts by 3 me-thods%纤维桩不同修复方法对薄弱根管抗折性能影响的实验研究

    Institute of Scientific and Technical Information of China (English)

    左恩俊; 牛卫东; 马国武; 胡书海

    2015-01-01

    Objective:To investigate the influence of 3 methods of fiber posts on fracture resistance of maxillary anterior teeth with flared root canals.Methods:32 human maxillary central incisors were assigned randomly to 4 groups(n =8).The crowns of the teeth were removed at a level 2 mm incisal to the cementoenamel junction(CEJ).After root canal therapy,flared canals were simula-ted in 3 groups.The flared canals were reinforced with resin cement(group A),resin composite(group B)and accessory posts (group C)respectively.In group D flared canals were not created.The same size fiber posts were cemented with resin cement in all groups.After posts cementation and composite resin core formation,all teeth were restored with metal crowns.Then the roots of the teeth were embedded in acrylic resin blocks up to 2 mm below the CEJ.The samples were loaded in a testing machine until failure occurred.Results:The maximum load value(N)for fracture of group A,B,C and D was 295.94 ±69.11,450.51 ±54.68, 479.37 ±77.81 and 618.51 ±87.42 respectively(F =118.127,P =0.000);group B vs C,P >0.05,between each 2 of the other groups,P 0.05). Conclusion:Reinforcement of flared canal with resin composite and accessory posts can increase the fracture restance of the tooth root and the most of fracture patterns are beneficial for the second repair.%目的:探讨纤维桩不同修复方法对薄弱根管抗折性能的影响。方法:将32颗离体上颌中切牙随机分为 A、B、C、D 4组(n =8)。将 A、B、C 组牙预备成漏斗状薄弱根管,采用纤维桩3种不同的修复方法修复;D 组为对照组,采用正常根管预备,用单根纤维桩复合树脂核修复。桩核修复后,4组均行铸造金属全冠修复。在电子万能试验机上持续加载至试样牙发生折裂。记录折裂时的加载载荷和折裂模式。结果:A、B、C、D 组的断裂载荷(N)分别为295.94±69.11、450.51±54.68、479.37±77.81、618.51±87.42(F

  11. 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.

  12. Evaluation on effect of glass fiber pile combined with all-ceramic crown in restoration for defect of anterior teeth%玻璃纤维桩联合全瓷冠修复前牙牙体缺损的效果评价

    Institute of Scientific and Technical Information of China (English)

    邹红

    2013-01-01

    目的 探讨玻璃纤维桩联合全瓷冠修复前牙牙体缺损的临床疗效.方法 将我院收治的因前牙缺损行美容修复的患者52 例(136 颗牙)随机分为治疗组(26 例70 颗)和对照组(26 例66 颗)两组,在根管治疗后分别采用玻璃纤维桩全瓷冠修复和铸造桩加钴铬烤瓷冠修复.观察两组修复成功率,对修复前后局部龈沟液(GCF)和龈沟液中碱性磷酸酶(ALP)水平进行检测,并对患者随访1 年,评估其远期疗效.结果 治疗组和对照组的修复成功率分别为95.7%、90.0% (P>0.05);治疗后4 周、12 周,对照组局部GCF、ALP水平均较治疗前显著升高,且显著高于同期治疗组的水平(P0.05);治疗1 年后,治疗组的修复体完整度、边缘适合度、颜色匹配均显著优于对照组(P0.05. After treatment for 4 weeks and 12 weeks, the levels of GCF and ALP was significantly increased in the control group compared with before treatment, while there was no significant difference on these indicators in the treatment group before and after treatment (t=0.65, 0.74, P>0.05). The levels after treatment were significantly higher in the control group than the treatment group (P<0.05). After restoration for 1 year, the integrity, marginal adaptation, and color match in the treatment group were all significantly better than those in the control group (P< 0.05). Conclusion Glass fiber pile combined with all-ceramic crown has relatively small stimulation on periodonti-um, with good aesthetic and biological characteristics, which can be used as an ideal restoration method for defect of anterior teeth.

  13. 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.

  14. Talon Cusp in Maxillary Permanent Incisor Teeth: Case Report

    OpenAIRE

    YAPAR, Arş. Gör. Dt. Merve İŞCAN; İLDAY, Yrd. Doç. Dr. Nurcan ÖZAKAR; ÇAĞLAYAN, Yrd. Doç. Dr. Fatma; NilgünSEVEN, Prof. Dr.

    2013-01-01

    Talon cusp is an uncommon developmental dental anomaly referring to an accessory cusp projecting from the cingulum area, or cemento-enamel junction of maxillary or mandibular anterior teeth, in both the primary and permanent dentition. The etiology of talon cusp is not well understood , but appears to have both genetic and environmental components. Permanent dentition have been involved three times more often than the primary dentition. This anomalous cusp may or may not cantain pulpal tissue...

  15. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    OpenAIRE

    Hegde, Rahul J.; Kavita Bapna

    2016-01-01

    Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid (EGTA) and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distribute...

  16. 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.

  17. Carisolv as an endodontic irrigant in deciduous teeth: An SEM study

    OpenAIRE

    Parul Singhal; Usha Mohan Das; Deepak Vishwanathan; Anita Singhal

    2012-01-01

    Aim: Root canal irrigation plays an important role in the debridement and disinfection of the root canal system. "The purpose of this study was to evaluate the efficacy of Carisolv TM , 1% sodium hypochlorite (NaOCl) gel, and 1% NaOCl solution as root canal irrigants in deciduous anterior teeth." Materials and Methods: Thirty-six extracted deciduous anterior teeth were used. Root canals were flooded with NaOCl solution in Group A, NaOCl gel in Group B and Carisolv TM in Group C and incuba...

  18. Take Care of Your Child's Teeth

    Science.gov (United States)

    ... Your Child’s Teeth Print This Topic En español Take Care of Your Child’s Teeth Browse Sections The Basics ... important. Baby teeth hold space for adult teeth. Take care of your child’s teeth to protect your child ...

  19. 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.

  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. 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.

  2. Application of computed tomography for supernumerary teeth location in pediatric dentistry.

    Science.gov (United States)

    Raupp, Suziane; Kramer, Paulo Floriani; de Oliveira, Helena Willhelm; da Rosa, Francinne Miranda; Faraco, Italo Medeiros

    2008-01-01

    Conventional radiographs provide bi-dimensional images of three-dimensional structures limiting optimal treatment planning. To overcome this deficiency, Computed Tomography (CT) has been used as a diagnostic method in Medicine and Dentistry. CT allows for supernumerary teeth location, the establishment of positional relations with other teeth, and the assessment of surrounding bone thickness; thus, facilitating surgical access and technique choice while reducing the procedure time, of great importance in pediatric dental care. The aim of this study was to present the possibility of applying CT for supernumerary teeth location, through the case report of a five-year-old female patient presenting two supernumerary teeth in the anterior palatal area. In conclusion, CT appears to be an excellent image diagnostic method for locating unerupted supernumerary teeth, providing precise information for planning and performing the surgical approach, while reducing operatory time and post-operatory complications; factors of extreme importance when treating young children. PMID:18767456

  3. 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.

  4. Sterilization of Extracted Human Teeth.

    Science.gov (United States)

    Pantera, Eugene A., Jr.; Schuster, George S.

    1990-01-01

    At present, there is no specific recommendation for sterilization of extracted human teeth used in dental technique courses. The purpose of this study was to determine whether autoclaving would be effective in the sterilization of extracted teeth without compromising the characteristics that make their use in clinical simulations desirable. (MLW)

  5. Taking Care of Your Teeth

    Science.gov (United States)

    ... important to keeping teeth healthy. When you eat sugary foods or drink sodas frequently throughout the day, the enamel that protects your teeth is constantly exposed to acids. Hard candies, cough ... foods containing sugar. Sugary or starchy foods eaten with a meal are ...

  6. 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。

  7. How Acid Reflux Disease Damages Teeth

    Science.gov (United States)

    ... more Seniors' Oral Health How to Keep Your Teeth for a Lifetime Tooth loss is simply the ... your desktop! more... How Acid Reflux Disease Damages Teeth Article Chapters How Acid Reflux Disease Damages Teeth ...

  8. Cerec anterior crowns: restorative options with monolithic ceramic materials.

    Science.gov (United States)

    Reich, Sven; Fiedlar, Kurt

    2013-01-01

    The aim of this article is to discuss the different types of monolithic ceramic crowns that can be placed on anterior teeth with existing shoulder preparations. Anterior crowns were indicated for the teeth 12 to 22 in the present case. The patient, a 65-year-old male, had received all-ceramic crowns 20 years earlier, which had started to develop cracks and palatal fractures over the last few years. The patient's teeth were prepared and four sets of crowns were fabricated using different monolithic ceramic materials: IPS e.max CAD, Cerec Blocs C In, VITABLOCS Real Life, and ENAMIC. Both shade characterization and crystallization firing were performed on the monolithic lithium disilicate glass ceramic crowns. The silicate ceramic crowns received glaze firing alone. The crowns made of hybrid ceramic (ENAMIC) were treated with a polymer sealant. PMID:24555406

  9. Triple Teeth: Report of an Unusual Case

    OpenAIRE

    Prashant Babaji; M. A. Prasanth; Ajith R. Gowda; 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.

  10. Supernumerary Teeth in Nepalese Children

    Directory of Open Access Journals (Sweden)

    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.

  11. 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.

  12. 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

    2013-01-01

    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

  13. PERIAPICAL HEALTH AND CORONARY RESTORATION QUALITY OF ROOT-FILLED TEETH IN THE TURKISH POPULATION

    Directory of Open Access Journals (Sweden)

    E. Bodrumlu

    2012-09-01

    Full Text Available Objective: The purpose of this study was to compare the quality of coronary restorations and root canal fillings with the periapical status of root-filled teeth, in a subpopulation of Turkish individuals. Method: The study included 18,210 randomly selected, 20- to 70-year-old patients referred to the Dental Faculty of Ondokuz Mayis University. A total number of 1,027 root-filled teeth from 780 patients (645 females, 382 males matched these criteria. Additionally, the radiographs were separated according to the age and gender of patients. Panoramic radiographies compared the quality of coronary restorations and root canal fillings with the periapical status of root-filled teeth. Results: The most numerous root-filled teeth were observed in the 20- to 29-year-old group, in both genders. For the maxillary and mandibular incisive teeth, the prevalence of inadequate coronary restoration with apical periodontitis (AP is 29.04% in males and 70.96%, respectively, in females (p<0.05. For the posterior teeth, in both jaws, the prevalence of inadequate coronary restoration with AP is 38.99% in males and 61.02%, respectively, in females. The AP prevalence in inadequate coronary restorations was significantly higher for the posterior than for the anterior teeth. Conclusion: This study concludes that adequate coronary restorations and crowned root-filled teeth significantly reduce AP incidence.

  14. 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

  15. A RARITY–CASES OF NATAL TEETH

    OpenAIRE

    Wairokpam Bhoomika; Ramakrishna; Oinam Joychandra; Mousumi

    2013-01-01

    ABSTRACT: Prematurely erupted teeth present at birth have been described as “natal teeth/ congenital teeth or fetal teeth”. Such teeth are of great concern to the parent because of several superstitions and beliefs. Other related inconvenien ces or dangers to the infants and mothers are the displacement and aspiration of such teeth cau sing injuries to the oral cavity along with The disturbance during breast feeding. The aim of t his case report is to discuss the...

  16. [Ancient teeth: research on teeth and jaws from archaeological sites].

    Science.gov (United States)

    Jelsma, J

    2016-05-01

    Archaeology aims to enhance our understanding of the human past. An archaeologist devotes him- or herself to material remains, most often from the earth. The best sources of information about human behaviour and the earlier conditions of life for human beings are gravesites. In addition to being a source of cultural information, well-preserved skeletons offer vast possibilities for biochemical and genetic research. Teeth in particular can provide a treasure trove of information about the lives of our ancestors. With DNA analysis, gender and genetic relationships can be determined, however, the surface of the teeth also provides information about gender, age and genetic relationships and, of course, about the use of the teeth. New discoveries are being made and new (bio-)archaeological analyses are being carried out all the time. PMID:27166454

  17. 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.

  18. 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.

  19. 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.

  20. 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.

  1. A Forgotten Technique for Replacement of Maxillary Anteriors and an associated Bony Defect: A Case Report

    OpenAIRE

    Manoaharan, P S; Ali, S.A Mohamed; Selvarangam, Suganya; Balaji, J.; Ibthigar, Mohamed

    2015-01-01

    Fixed replacement of maxillary anterior teeth with an associated bony defect has challenged the restoring dentist with problems like weight of the prosthesis thereby leading to weakening of abutment teeth, difficulty in establishing smile line and mechanical stability. This article describes the management of a patient with such defect with a forgotten prosthesis – the Andrew bridge system, which has a fixed and a removable prosthetic component with retentive clips, which anchors on to a bar ...

  2. 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.

  3. 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.

  4. Bilateral anterior shoulder dislocation

    OpenAIRE

    Meena, Sanjay; Saini, Pramod; Singh, Vivek; Kumar, Ramakant; Trikha, Vivek

    2013-01-01

    Shoulder dislocations are the most common major joint dislocations encountered in the emergency departments. Bilateral shoulder dislocations are rare and of these, bilateral posterior shoulder dislocations are more prevalent than bilateral anterior shoulder dislocations. Bilateral anterior shoulder dislocation is very rare. We present a case of 24-year-old male who sustained bilateral anterior shoulder dislocation following minor trauma, with associated greater tuberosity fracture on one side...

  5. Segmentation of teeth in CT volumetric dataset by panoramic projection and variational level set

    Energy Technology Data Exchange (ETDEWEB)

    Hosntalab, Mohammad [Islamic Azad University, Faculty of Engineering, Science and Research Branch, Tehran (Iran); Aghaeizadeh Zoroofi, Reza [University of Tehran, Control and Intelligent Processing Center of Excellence, School of Electrical and Computer Engineering, College of Engineering, Tehran (Iran); Abbaspour Tehrani-Fard, Ali [Islamic Azad University, Faculty of Engineering, Science and Research Branch, Tehran (Iran); Sharif University of Technology, Department of Electrical Engineering, Tehran (Iran); Shirani, Gholamreza [Faculty of Dentistry Medical Science of Tehran University, Oral and Maxillofacial Surgery Department, Tehran (Iran)

    2008-09-15

    Quantification of teeth is of clinical importance for various computer assisted procedures such as dental implant, orthodontic planning, face, jaw and cosmetic surgeries. In this regard, segmentation is a major step. In this paper, we propose a method for segmentation of teeth in volumetric computed tomography (CT) data using panoramic re-sampling of the dataset in the coronal view and variational level set. The proposed method consists of five steps as follows: first, we extract a mask in a CT images using Otsu thresholding. Second, the teeth are segmented from other bony tissues by utilizing anatomical knowledge of teeth in the jaws. Third, the proposed method is followed by estimating the arc of the upper and lower jaws and panoramic re-sampling of the dataset. Separation of upper and lower jaws and initial segmentation of teeth are performed by employing the horizontal and vertical projections of the panoramic dataset, respectively. Based the above mentioned procedures an initial mask for each tooth is obtained. Finally, we utilize the initial mask of teeth and apply a Variational level set to refine initial teeth boundaries to final contours. The proposed algorithm was evaluated in the presence of 30 multi-slice CT datasets including 3,600 images. Experimental results reveal the effectiveness of the proposed method. In the proposed algorithm, the variational level set technique was utilized to trace the contour of the teeth. In view of the fact that, this technique is based on the characteristic of the overall region of the teeth image, it is possible to extract a very smooth and accurate tooth contour using this technique. In the presence of the available datasets, the proposed technique was successful in teeth segmentation compared to previous techniques. (orig.)

  6. Natal Teeth: A Case Report and Reappraisal

    OpenAIRE

    Malki,Ghadah A.; Al-Badawi, Emad A.; Dahlan, Mohammad A.

    2015-01-01

    The presence of teeth at birth (natal teeth) or within a month after delivery (neonatal teeth) is a rare condition. Natal and neonatal teeth are conditions of significant importance to pediatric dentists and pediatricians. This report discusses a case in which a five-day-old infant required extraction of a mobile mandibular natal tooth to avoid the risk of aspiration and interference with feeding. Also, a review of the literature was conducted to discuss the etiology, clinical features, compl...

  7. Multiple Impacted Teeth: Report of 3 Cases

    OpenAIRE

    Bayar, Gürkan Raşit; Ortakoḡlu, Kerim; Sencimen, Metin

    2008-01-01

    While impaction of tooth is widespread, multiple impacted teeth by itself is a rare condition and often found in association with syndromes such as cleidocranial dysplasia or Gardner’s syndrome. A light of radiographic examination, we describe three Turkish young males with multiple impacted teeth who didn’t possess any systemic conditions or syndromes involving both jaws. The first patient, a 21-year-old young male, had 16 unerupted teeth and 5 unerupted supernumerary teeth. The second patie...

  8. Class I malocclusion with anterior crossbite and severe crowding

    OpenAIRE

    Ritter, Daltro Enéas

    2014-01-01

    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 leveli...

  9. Take Care of Your Teeth and Gums

    Science.gov (United States)

    ... Teeth and Gums Print This Topic En español Take Care of Your Teeth and Gums Browse Sections The ... The Basics The Basics: Overview It’s important to take care of your teeth and gums. You can prevent ...

  10. Cracked Teeth: A Review of the Literature

    OpenAIRE

    Lubisich, Erinne B.; Hilton, Thomas J.; Ferracane, Jack

    2010-01-01

    Although cracked teeth are a common problem for patients and dentists, there is a dearth of evidence-based guidelines on how to prevent, diagnose, and treat cracks in teeth. The purpose of this article is to review the literature to establish what evidence exists regarding the risk factors for cracked teeth and their prevention, diagnosis, and treatment.

  11. 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

  12. 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

  13. 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.

  14. Radiologic study of peridontal and periapical changes for the restorated teeth

    International Nuclear Information System (INIS)

    The purpose of this study is to investigate the effect of dental restorations on the periodontal and periapical tissues. The author examined 620 cases of amalgam, 390 cases of fold inlay, 442 cases of crown and 644 cases of bridge through the standard intraoral films being appended in the charts that gad been kept at the Dept. of Oral Diagnosis in Seoul National University Hospital. This study obtained the following results; 1. The restorations of amalgam, gold inlay crown and bridge were found more frequently in female than in male. 2. The restorations of amalgam, gold inlay and crown were found more numerously in mandibular teeth than in maxillary teeth in both sexes. But in the case of crown, the fact is quite the reverse especially in anterior teeth. 3. On the contrary, tn the case of bridge, the restorations of bridge were much more distributed in the maxillary teeth than in the mandibular teeth. 4. Roentgenographic changes of periodontal tissues whose teeth were treated with any type of four restorations were periodontal space widening, lamina dura discontinuity and periapical lesion in the order described in both sexes. 5. On the occasion of between amalgam and gold inlay or between crown and bridge, the differences of periodontal changes were of no consequence. On the other hand, the differences of periodontal changes were apparent between the group of amalgam and gold inlay and the group of crown and bridge.

  15. 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....

  16. The Replacement of Missing Teeth

    OpenAIRE

    Zarb, George A.

    1988-01-01

    Dentists have used a great deal of ingenuity in replacing lost teeth. Until recently, however, it was not possible to duplicate the natural situation and attach tooth-root analogues to the host bone. Osseointegration allows such an attachment, in which threaded unalloyed titanium implants are placed in the bone by means of a meticulous surgical procedure. The documented successful use of this process has already altered profoundly the predicament of the edentulous patient. The application of ...

  17. 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.

  18. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic

    OpenAIRE

    K. Pavan Kumar; Surya Kumari Nujella; S. Sujatha Gopal; K. Karthik Roy

    2016-01-01

    For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge w...

  19. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic.

    Science.gov (United States)

    Kumar, K Pavan; Nujella, Surya Kumari; Gopal, S Sujatha; Roy, K Karthik

    2016-01-01

    For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge was intact with good esthetics and no problem was reported. PMID:27195156

  20. Anterior cruciate ligament (ACL) injury

    Science.gov (United States)

    Cruciate ligament injury - anterior; ACL injury; Knee injury - anterior cruciate ligament (ACL) ... knee. It prevents the knee from bending out. Anterior cruciate ligament (ACL) is in the middle of the knee. ...

  1. 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 lead to spontaneous eruption of the impacted teeth depending on the age when the surgery is performed, the size of the lesion, and the stage of tooth development of the involved teeth. Purpose: This paper attempts to emphasize the importance of early removal of compound odontoma to enable spontaneous eruption of the affected teeth. Case: A case of odontoma in the anterior maxilla causing failure of eruption and delayed root formation of upper right permanent lateral incisor and canine in a 10-year-old male patient is presented. Case management: The odontoma was surgically removed under general anesthesia and histology result confirmed the diagnosis of compound odontoma. A three-year post surgical follow up showed spontaneous eruption as well as continued root formation of the two affected teeth. Conclusion: Removal of odontoma may lead to spontaneous eruption of the affected teeth if their root development are not completed.Latar belakang: Compound odontoma pada daerah anterior maksila pada masa geligi pergantian sering menyebabkan hambatan erupsi pada gigi permanen penggantinya. Kemungkinan terjadinya erupsi spontan gigi permanen yang impaksi setelah pengambilan odontoma tergantung dari: umur penderita pada saat dilakukan operasi, ukuran lesi odontoma dan tahapan perkembangan gigi permanen yang terlibat. Tujuan: Laporan kasus ini ingin menekankan pentingnya pengambilan compound odontoma sedini mungkin untuk memberi kesempatan tumbuhnya gigi permanen yang terlibat dan erupsi secara spontan. Kasus: Ditampilkan sebuah kasus compound odontoma pada regio maksila anterior menyebabkan gagalnya erupsi dan terlambatnya pembentukan akar gigi insisif kedua dan kaninus permanent rahang atas kanan pada penderita anak laki-laki berumur 10 tahun

  2. [Treatment of ankylosed teeth by segmental corticotomy: the Orthodontic Bone Stretching technique. Preliminary study].

    Science.gov (United States)

    Bousquet, Philippe; Artz, Christèle; Canal, Pierre

    2013-12-01

    Ankylosed anterior teeth are associated with infraclusion and can lead to a concomitant significant esthetic defect. After a review of the techniques used move these teeth into the arch, this article describes a new technique to restore occlusion and improve esthetics, or to prepare the case for either a prosthetic or implant treatment, Orthodontic Bone Stretching (OBS). This technic combines partial corticotomy and orthodontic treatment and produces bone stretching. After 8 to 12 weeks of force application, the ankylosed teeth are repositioned into occlusion or, if extraction is necessary, the bone crest is at a level consistent with a prosthetic or implant treatment. OBS technique can be adapted to implant infraclusion, or the vertical regeneration of atrophied ridge. PMID:24280548

  3. Cutaneous Sinus Tract in Association with Traumatic Injury to the Teeth

    OpenAIRE

    Mishra, Rahul; Khan, Tayyeb Sultan

    2013-01-01

    ABSTRACT The present case report is of trauma episode of the lower anterior teeth, causing pulpal necrosis with periradicular periodontitis, resulting in the occurrence of cutaneous sinus tracts (fistula). Previous misdiagnosis and inappropriate medical treatment were ineffective. Only when properly referred to dentists, the differential diagnosis was made. The guideline to diagnose cutaneous sinus tracts (fistula) is based mainly on accurate pulp sensitivity tests of the involved traumatized...

  4. Supernumerary teeth "mesiodens". Case report.

    Science.gov (United States)

    Itro, A; Difalco, P

    2003-09-01

    The supernumerary tooth is an anomaly of dental eruption that is not rare to find in the clinical practice. Among the supernumerary teeth the "mesiodens" is most frequent. The mesiodens is found in the region of the superior central incisors and it can be the cause of many complications. The aim of this work is the description of a rare symptomatic case of mesiodens and the diagnostic and therapeutic strategies to adopt when this dental anomaly occurs. In particular the authors suggest making radiographic examinations only in the family of patients with dental anomalies of number, thinking that the incidence of such anomalies is too low to justify mass radiographic examinations. PMID:14608252

  5. Supernumerary teeth in non-syndromic patients

    Energy Technology Data Exchange (ETDEWEB)

    Mali, Santosh; Karjodkar, Freny Rashmiraj; Sontakke, Subodh; Sansare, Kaustubh [Nair Hospital Dental College, Maharashtra (India)

    2012-03-15

    Hyperdontia or supernumerary teeth without associated syndrome is a rare phenomenon, as supernumerary teeth are usually associated with cleft lip and palate or other syndromes such as Gardner's syndrome, cleidocranial dysplasia, and so on. Five patients with supernumerary teeth visited our department. They had no familial history or other pathology, certain treatment protocols was modified due to the presence of supernumerary teeth. Non-syndromic supernumerary teeth, if asymptomatic, need to have periodical radiographic observation. If they showed no variation as they impacted in the jaw, careful examination is necessary because they may develop into pathological status such as dentigerous cysts. The importance of a precise clinical history and radiographic examination for patients with multiple supernumerary teeth should be emphasized.

  6. A New Design for Anterior Laminate Fixed-Partial dentures; PTU Type I

    Directory of Open Access Journals (Sweden)

    A. Pahlevan

    2006-03-01

    Full Text Available A new fixed-partial denture design using laminates is described for the replacement of a missing anterior tooth. In this article advantages, disadvantages, indications and contraindications of the new design have been discussed. This method is best suited forcases with missing incisors and esthetically compromised abutment teeth.

  7. A New Design for Anterior Laminate Fixed-Partial dentures; PTU Type I

    OpenAIRE

    A. Pahlevan

    2006-01-01

    A new fixed-partial denture design using laminates is described for the replacement of a missing anterior tooth. In this article advantages, disadvantages, indications and contraindications of the new design have been discussed. This method is best suited forcases with missing incisors and esthetically compromised abutment teeth.

  8. Human teeth biobank for research in odontology

    OpenAIRE

    Lina C Gonzáles Pita; Úsuga Vacca, Margarita Viviana; Torres Rodríguez, Carolina; Delgado Mejía, Edgar

    2014-01-01

    Human teeth biobank (HTB) is a higher education linked non-profit entity that collects, stores and administers donated teeth. Such an entity is supported by sanitary, biosafety, ethical and legal regulations. The purpose of this article is to describe the creation and development of an HTB comprising the biological, ethical, legal and biosafety aspects and the importance of keeping extracted teeth under controlled, reproducible and standardized conditions that do not affect their structure an...

  9. Corticotomy and compression osteogenesis in the posterior maxilla for treating severe anterior open bite.

    Science.gov (United States)

    Kanno, T; Mitsugi, M; Furuki, Y; Kozato, S; Ayasaka, N; Mori, H

    2007-04-01

    A new technique is described for outpatient treatment of anterior open bite. The compression osteogenesis method with a two-stage corticotomy was used in the posterior maxilla to treat a woman with severe anterior open bite. Three-week post-surgical compression using anchor plates and elastics repositioned the posterior maxillary bone/teeth segments by 7 mm to the ideal superior position. The patient had a stable skeletal position of the maxilla at 14-month follow-up with satisfactory results and no complications after orthodontic treatment. This technique appears to be an efficient option for treating patients with anterior open bite. PMID:17110086

  10. Correction of anterior crossbite using modified transparent aligners: An esthetic approach

    Directory of Open Access Journals (Sweden)

    K Korath Abraham

    2016-01-01

    Full Text Available Anterior crossbite results from the abnormal axial inclination of one or more anterior teeth. It is a major esthetic and functional anomaly which has to be corrected in the primary and early mixed dentition period to allow the normal development of maxilla and mandible as well as the occlusion. Several treatment options are available to correct the problem. A unique appliance, "modified transparent tray aligners" was used to correct the anterior crossbite in an 8-year-old child. The clinical presentation, fabrication of the appliance, and the outcome are discussed.

  11. Correction of anterior crossbite using modified transparent aligners: An esthetic approach

    Science.gov (United States)

    Abraham, K. Korath; James, Arun Roy; Thenumkal, Elza; Emmatty, Tharian

    2016-01-01

    Anterior crossbite results from the abnormal axial inclination of one or more anterior teeth. It is a major esthetic and functional anomaly which has to be corrected in the primary and early mixed dentition period to allow the normal development of maxilla and mandible as well as the occlusion. Several treatment options are available to correct the problem. A unique appliance, “modified transparent tray aligners” was used to correct the anterior crossbite in an 8-year-old child. The clinical presentation, fabrication of the appliance, and the outcome are discussed. PMID:27630508

  12. Etiological aspects of anterior open bite

    Directory of Open Access Journals (Sweden)

    Stojanović Ljiljana

    2007-01-01

    Full Text Available Introduction. Open bite is a multifactorial phenomenon and no single factor can account for open-bite. Etiology plays an important role in diagnosis. Heredity, unfavorable growth patterns, incorrect jaw postoure, are the characteristics of skeletal open bite. Digit sucking. Depending on where the thumb is placed, a number of different types of dental problems can develop. Malocclusions of the late mixed or permanent dentitions, caused by thumb sucking are not self corrected and orthodontic treatment is necessary for their correction. Lymphatic tissue. In order to produce oral respiration, the mandible is postured inferiorly with the tongue protruded and resting against the oral floor. This postural alteration induces dental and skeletal modifications similar to those caused by thumb sucking. This may cause excessive eruption of the posterior teeth, leading to an increase in the vertical dimension of the face and result in development of anterior open bite. Tongue thrust. Tongue habits cause an anterior open bite or they develop secondarily to thumb sucking. In skeletal open bite the tongue habit acts as a secondary factor which helps to maintain or exacerbate the condition. Many orthodontists have had a discouraging experience of completing dental treatment, with what appeared to be good results, only to discover that the case had relapsed because the patient had a tongue thrust swallowing pattern. Conclusion. Dentoalveolar or habitual open bite is caused by habits, which influence the growth and development of dentoalveolar processes and contribute to occlusal disharmonies. Prior to eruption of adult dentition, open bite related to oral habits is usually not a concern as when the habits stop, because the erupting dentition tends to improve spontaneously. Treatment is usually not necessary until permanent teeth erupt (~6 years old. .

  13. Reattachment of fractured teeth fragments in mandibular incisors: a case report

    Directory of Open Access Journals (Sweden)

    Yousef MK

    2015-04-01

    Full Text Available Mohammed K YousefDepartment of Operative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi ArabiaAbstract: The majority of dental trauma involves anterior teeth, especially the maxillary central incisors. A mandibular incisor fracture with or without pulp tissue involvement is considerably less common. Different approaches for treating these fractured teeth have been reported in the literature. The type of treatment rendered depends mainly on the extent of fracture, pulp involvement, radicular fracture, biologic width infringement or violation, and presence of the fractured piece. This case report illustrates reattachment of fractured fragments on two mandibular incisors without pulp exposure using a new proposed reattachment method using a combination of two different types of composite materials together with an orthodontic lingual retention wire. An 8-year-old female patient presented with fractured mandibular left incisors (Ellis class II fracture. Broken pieces were saved and brought in a closed container in water. Periapical radiographs revealed no evidence of pulpal involvement in either tooth and no periapical radiolucency was noticed. Fractured fragments and the broken teeth were prepared with circumferential bevels. Reattachment of the fractured fragments were done using two types of composite resin materials and a lingual orthodontic retention wire was also used. The patient was recalled after 8 months to follow up both teeth. Clinical examination revealed excellent composite restorations covering the fracture lines.Keywords: reattachment, fractured teeth, dental trauma 

  14. New method of laser doppler flowmetry signal processing in pulp vitality evaluation after teeth cosmetic treatment

    Science.gov (United States)

    Todea, Carmen; Sarpe, Amalia; Vitez, Bogdan; Draganescu, Gheorghe

    2014-01-01

    The present study aims to assess the pulp vitality before and after different tooth bleaching procedures, in order to determine the changes in pulpal microcirculation and whether they are reversible or not. Twelve volunteers were included in this study. For each volunteer, the pulpal blood flow of maxillary teeth was assessed prior to treatment using Laser Doppler Flowmetry. The "in office" bleaching technique was used 6 anterior teeth, with two different gels, a conventional one chemically activated (Group I 3teeth) and another one activated using Nd:YAG laser (Group II-3 teeth). The bleaching agents were applied on counterpart teeth and, after obtaining a esthetic results for each tooth, the pulpal blood flow was assessed using Laser Doppler Flowmetry immediately after treatment and then after one day and one week. All data were collected and statistically analyzed. Immediately after treatment, the assessment showed an increase of pulpal blood flow, for both study groups, but higher in Group I as compared to Group II (ptreatment method, which does not lead to irreversible damage to the dental pulp, when used correctly.

  15. Comparison of the Root End Sealing Ability of Four Different Retrograde Filling Materials in Teeth with Root Apices Resected at Different Angles – An Invitro Study

    Science.gov (United States)

    Ponnappa, K.C.; Yadav, Pankaj; Rao, Yogesh; Relhan, Nikhil; Gupta, Priyanka; Choubey, Ashish; Bhardwaj, Shivanshu

    2016-01-01

    Introduction Insufficient apical seal is the significant reason for surgical endodontic disappointment. The root-end filling material utilized should avoid egress of potential contaminants into periapical tissue. Aim The aim of this study was to compare the sealing ability of four root-end filling materials MTA, Portland cement, IRM, RMGIC in teeth with root apices resected at 0 and 45 angle using dye penetration method under fluorescent microscope. Materials and Methods Hundred extracted human maxillary anterior teeth were sectioned horizontally at the cement-enamel junction. After cleaning, shaping and obturation with gutta-percha and AH Plus sealer, the tooth samples were randomly divided in two groups (the root apices resected at 0° and 45° to the long axis of the root). The root resections were carried out by removing 2 mm and 1 mm in both the groups. Following which 3 mm deep root-end cavities were prepared at the apices and the root were coated with nail varnish except the tip. The teeth in both the group were randomly divided into four subgroups each (Pro root MTA, Portland cement, IRM and Light cure nano GIC Ketac N-100). All the retrofilled samples were stored in acrydine orange for 24 hours after which they were cleaned and vertically sectioned buccolingually. The sectioned root samples were observed under fluorescent microscope. Results The root apex sealing ability of Mineral Trioxide Aggregate (MTA) was superior to Portland cement, Intermediate Restorative Material (IRM) and LC GIC. IRM demonstrated the maximum apical leakage value among all the materials. Portland cement and LC GIC showed comparable sealing ability. Conclusion The angulation whether 0° or 45° angle did not affect the sealing ability of all the four materials used, MTA proved to be one of the superior materials for root-end filling. PMID:26894168

  16. Optimizing Anterior En Masse Retraction with Miniscrew Anchorage

    Directory of Open Access Journals (Sweden)

    Pavankumar Janardan Vibhute

    2011-01-01

    Full Text Available In severely protrusive patients, skeletal anchorage from miniscrew is often used to avoid anchorage loss with preferred miniscrew location near centre of resistance (Cres of posterior teeth. Biomechanical requirement for directing retraction force towards Cres of posterior teeth demands the insertion of miniscrew in loose mucosa, where risk of infection and failure increases. In addition, undesirable biomechanical side effects on anterior and posterior segments may be possible in all three planes, when continuous arch sliding mechanics are installed with miniscrew anchorage. This paper describes technique of molar-stabilizing power arm (MSPA for simultaneous intrusion and retraction of anteriors with miniscrew placement at attached gingiva between 1st molar and 2nd premolar. Advantages of this technique include (i the need of miniscrews placement in loose mucosa apically near the Cres of the posterior teeth is eliminated, (ii the risk of infection and miniscrew failure is lowered since the miniscrew is placed in attached gingiva rather than the loose mucosa, and (iii by adjusting vertical length or replacing MSPA, alteration of the retraction force vector is possible in all three planes; thus, need of removal and repositioning of the miniscrew (e.g., in correction of occlusal cant can be eliminated.

  17. Optimizing anterior en masse retraction with miniscrew anchorage.

    Science.gov (United States)

    Vibhute, Pavankumar Janardan

    2011-01-01

    In severely protrusive patients, skeletal anchorage from miniscrew is often used to avoid anchorage loss with preferred miniscrew location near centre of resistance (Cres) of posterior teeth. Biomechanical requirement for directing retraction force towards Cres of posterior teeth demands the insertion of miniscrew in loose mucosa, where risk of infection and failure increases. In addition, undesirable biomechanical side effects on anterior and posterior segments may be possible in all three planes, when continuous arch sliding mechanics are installed with miniscrew anchorage. This paper describes technique of molar-stabilizing power arm (MSPA) for simultaneous intrusion and retraction of anteriors with miniscrew placement at attached gingiva between 1st molar and 2nd premolar. Advantages of this technique include (i) the need of miniscrews placement in loose mucosa apically near the Cres of the posterior teeth is eliminated, (ii) the risk of infection and miniscrew failure is lowered since the miniscrew is placed in attached gingiva rather than the loose mucosa, and (iii) by adjusting vertical length or replacing MSPA, alteration of the retraction force vector is possible in all three planes; thus, need of removal and repositioning of the miniscrew (e.g., in correction of occlusal cant) can be eliminated. PMID:22567438

  18. Congenital anterior urethral diverticulum.

    Science.gov (United States)

    Singh, Sanjeet Kumar; Ansari, Ms

    2014-09-01

    Congenital anterior urethral diverticulum (CAUD) may be found all along the anterior urethra and may present itself at any age, from infant to adult. Most children with this condition present with difficulty in initiating micturition, dribbling of urine, poor urinary stream, or urinary tract infection. A careful history will reveal that these children never had a good urinary stream since birth, and the telltale sign is a cystic swelling of the penile urethra. In this paper, we present two cases of CAUD that were managed by excision of the diverticulum with primary repair. PMID:26328174

  19. Caries detection in primary teeth is less challenging than in permanent teeth

    Directory of Open Access Journals (Sweden)

    Fausto M Mendes

    2013-01-01

    Full Text Available Introduction: Most studies about caries detection methods have been performed using permanent teeth. Primary teeth, however, present significant differences from permanent teeth; hence findings of these studies with permanent teeth cannot be extrapolated. The Hypothesis: Our hypothesis is that the caries diagnosis process in primary teeth is less challenging than in permanent teeth. This assertion is based on the fact that primary enamel is thinner and the caries process progresses faster in this type of teeth when compared to permanent teeth. For these reasons, the majority of caries lesions in primary teeth would be more evident and therefore, easily detected through visual inspection. Only a few number of caries lesions would be missed by visual inspection. Thus, adjunct diagnostic methods, such as radiographs, would be unnecessary for primary teeth. Evaluation of the Hypothesis: To evaluate this hypothesis, researchers should conduct studies about the performance of the caries detection methods avoiding selection bias and defining appropriate settings. Clinical trials randomizing the diagnostic strategies would be worthwhile. The evidence supporting the benefits of adjunct methods in detecting caries lesions in primary lesions is limited. However, clinical guidelines have recommended the use of the radiographic method to detect caries in primary teeth in all symptomless children. The confirmation of our hypothesis would lead to the need to re-evaluate such guidelines.

  20. Incidence of post-operative pain following single visit endodontics in vital and non-vital teeth: An in vivo study

    Directory of Open Access Journals (Sweden)

    Sumita Bhagwat

    2013-01-01

    Full Text Available This clinical study was conducted to compare the post-operative pain following single visit endodontics in vital and non-vital teeth, with and without periapical radiolucency. A total of 60 adult patients requiring root canal therapy in anterior and premolar teeth were selected for this study. Single sitting root canal treatment was carried out and the subjects were recalled after 2 weeks and instructed to fill out a series of self-report questionnaires for responses about pain in the interim after 1 day, 2 day, 3 day, 1 week and 2 weeks. In vital teeth (Group I 60% of the treated cases had pain, of which 36% had mild pain (non-significant and 24% had moderate pain (significant. In non-vital teeth without periapical radiolucency (Group II 64% of cases had pain, of which 48% had mild pain (non-significant and 16% had moderate pain (significant. In non-vital teeth with periapical radiolucency (Group III 32% of the cases had pain of which 24% had mild pain (non-significant and 8% had moderate pain (significant. None of the teeth in any of the groups had severe pain. There was no statistical difference between incidence of pain in vital and non-vital teeth without periapical radiolucency. Non-vital teeth with periapical radiolucency exhibited relatively less pain as compared with non-vital teeth without periapical radiolucency, but the pain continued in a significant percent of teeth even after 2 weeks. Pain incidence dropped significantly within a period of 1 day to 2 weeks in vital teeth and non-vital teeth without periapical radiolucency. There was a tendency for less incidence of significant pain after a single visit root canal treatment in these groups. Results obtained were comparable with those obtained by several investigators.

  1. Fracture resistance of posterior teeth restored with modern restorative materials

    OpenAIRE

    Ibrahim M. Hamouda; Shehata, Salah H.

    2011-01-01

    We studied the fracture resistance of maxillary premolars restored with recent restorative materials. Fifty maxillary premolars were divided into five groups: Group 1 were unprepared teeth; Group 2 were teeth prepared without restoration; Group 3 were teeth restored with tetric ceram HB; Group 4 were teeth restored with InTen S; and Group 5 were teeth restored with Admira. The samples were tested using a universal testing machine. Peak loads at fracture were recorded. The teeth restored with ...

  2. Influence of voluntary teeth clenching on the stabilization of postural stance disturbed by electrical stimulation of unilateral lower limb.

    Science.gov (United States)

    Fujino, Sachiko; Takahashi, Toshiyuki; Ueno, Toshiaki

    2010-01-01

    Studies on the relationship between dental occlusion and body balance have suggested that occlusion status contributes to the maintenance of postural balance. However, little has been reported about the effects of voluntary teeth clenching on the stabilization of postural stance in novel environments. In the present study we investigated whether teeth clenching influenced adaptation to the perturbation introduced by electrical stimulation of a unilateral lower limb. Subjects (12 adults) stood on a force plate, from which motion data were obtained in the horizontal plane with and without voluntary teeth clenching and were instructed to maintain the position throughout the experiment. We evoked a novel environment by supramaximal percutaneous electrical stimulation of the common peroneal nerve. Electromyograms (EMG) were recorded from the masseter and the peroneus longus (PL) muscles with bipolar surface cup electrodes. When the disturbed postural stance was generated by electrical stimulation, the maximum reaction force in the anterior-posterior (A/P) direction with teeth clenching (CL) was significantly smaller than that without voluntary teeth clenching (control; CO) (p<0.05) and the peak time of the ground reaction force/body mass (GRF/BM) in the A/P direction occurred earlier in the CL condition than CO (p<0.05). There were no significant differences in the peak-to-peak amplitude of GRF/BM and the peak time of GRF/BM, in the M/L direction under both CL and CO conditions. Thus, the present study showed that voluntary teeth clenching contributed to stabilization of the postural stance perturbed transiently by electrical stimulation. We concluded that voluntary teeth clenching plays an important role in rapid postural adaptation to the anterior-posterior perturbation in the upright position. PMID:19879763

  3. Orthodontics Align Crooked Teeth and Boost Self-Esteem

    Science.gov (United States)

    ... desktop! more... Orthodontics Align Crooked Teeth and Boost Self- esteem Article Chapters Orthodontics Align Crooked Teeth and Boost Self- esteem Orthodontics print full article print this chapter email ...

  4. Provisional anterior tooth replacement using nonimpregnated fiber and fiber-reinforced composite resin materials: a clinical report.

    Science.gov (United States)

    Chan, Daniel C N; Giannini, Marcelo; De Goes, Mario Fernando

    2006-05-01

    The loss of anterior teeth is often a serious esthetic concern. While conventional fixed partial dentures and implant-supported restorations may be the treatments of choice, nonimpregnated fibers (NFs) and fiber-reinforced composite (FRC) resins offer a conservative alternative for improving esthetics. This article describes 2 clinical situations in which NF glass ribbon and FRC were successfully used to provisionally restore anterior edentulous areas in an esthetic, functional, and timely manner.

  5. A prosthodontic management of severely resorbed anterior ridge defect - a case report.

    Science.gov (United States)

    Rai, Rathika; V, Menaga; R, Prabhu; Kr, Geetha; R, Suprabha

    2014-09-01

    The Dental profession has devoted most of its history to restoring the effects of dental disease. The public's interest in Dental health and beauty has become an engine that continues to drive the demand for cosmetic dental procedures. In the past, achieving a beautiful smile required submission to extensive invasive procedures and expensive fixed dental prosthetic restorations. Advancements in restorative material formulations and adhesive technology have expanded such possibilities. Despite many recent advances in aesthetic dentistry techniques and materials, certain cases remain difficult to restore. Replacing missing anterior teeth presents a serious challenge to the clinicians especially with a large ridge defect. Such cases require not only replacement of the missing teeth but also the restoration of the bone defect, aesthetics and phonetics. While the conventional treatment approaches like fixed partial denture or an option of implant may not justify the restoration of the defects. A combination of fixed and removable restoration provides good alternative. The aim and purpose of this case report is to describe a multidisciplinary approach of managing a patient who reported with a similar complaint of missing anterior teeth with anterior ridge defect hoping to get not only her teeth but also her lost smile. PMID:25386538

  6. Freeze-dried fibular allograft in anterior spinal surgery: cervical and lumbar applications.

    OpenAIRE

    Wetzel, F.T.; Hoffman, M. A.; Arcieri, R. R.

    1993-01-01

    Fifty-six patients who underwent anterior fusion utilizing fibular allograft are reviewed. Thirty-two patients underwent multiple-level anterior cervical discectomy and fusion utilizing fibular strut allograft, and 24 underwent anterior lumbar discectomy and fusion using fibular strut allograft. Cervical surgery was performed via the strut technique of Whitecloud and LaRocca and lumbar surgery was performed via a transperitoneal or retroperitoneal approach. Postoperatively, patients were assi...

  7. Severe Class II anterior deep bite malocclusion treated with a C-lingual retractor.

    Science.gov (United States)

    Kim, Seong-Hun; Park, Young-Guk; Chung, Kyurhim

    2004-04-01

    A C-lingual retractor was placed on the lingual aspects of the six maxillary anterior teeth in a 24-year-old female patient with a Class II anterior deep-bite malocclusion. The treatment plan consisted of extracting both the upper first premolars and intruding and retracting the upper six anterior teeth. Transpalatal arches were soldered to the upper first and second molar bands and used as an intra-arch anchor unit for upper space closure. Double NiTi closed coil springs were used palatally between the hooks of the C-lingual retractor and the transplantar arches. A high-pull headgear was used for anchorage reinforcement during en masse retraction. It took 14 months to treat this patient. The correct overbite and overjet was obtained by simultaneously intruding and retracting the upper six anterior teeth into their proper positions by C-lingual retractor mechanics, which contributed to an improvement in facial balance. The treatment result was stable 6 months after debonding. The application of this new appliance, consideration in case selection, and sequence of treatment are presented.

  8. Take Care of Your Teeth and Gums

    Science.gov (United States)

    ... This Topic En español Take Care of Your Teeth and Gums Browse Sections The Basics Overview Why ... Brushing Tips 4 of 6 sections Take Action: Dental Checkups Get regular checkups at the dentist. Visit ...

  9. [Wisdom teeth: which way to go?].

    Science.gov (United States)

    Yitschaky, O; Segev-Neuhof, M; Laviv, A

    2016-01-01

    The debate regarding prophylactic extraction of mandibular third molar (Wisdom teeth) is not new. There is wide agreement among clinicians and researchers that an extraction in young age is easier and safer, but it may result in overtreatment, which means an unnecessary extraction of teeth that might have been functional and healthy. In order to avoid such overtreatment the clinician is obliged to be able to predict accurately the chances of third molar eruption, years before they are due to erupt. Additionally, the clinician has to estimate the chances for future pathology or infection that will force the patient to extract the tooth in years to come. In order to do so the clinician has to meticulously examine the teeth both clinically (including caries assessment of neighboring teeth, periodontal pocket depth measurements etc.) and radiographically. The purpose of this literature review is to present a balanced approach towards the issue of early prophylactic extraction of mandibular third molar.

  10. Bruxism (Teeth Grinding or Clenching) (For Parents)

    Science.gov (United States)

    ... Tropical Delight: Melon Smoothie Pregnant? Your Baby's Growth Bruxism (Teeth Grinding or Clenching) KidsHealth > For Parents > Bruxism ( ... called bruxism , which is common in kids. About Bruxism Bruxism is the medical term for the grinding ...

  11. Laser and LED external teeth-bleaching

    Science.gov (United States)

    Zanin, Fatima A.; Brugnera, Aldo, Jr.; Marchesan, Melissa A.; Pecora, Jesus D.

    2004-09-01

    Teeth-bleaching is an initial phase in the reproduction of an aesthetic smile; thus, it is very important that the dentist knows how to diagnose the causes of color changes and indicate whitening before proposing dental treatment. Technological advances in teeth-whitening lead to the development of new techniques, improving comfort, security and decreasing time of execution: argon laser, diode Laser, LED whitening, xenon light whitening. The clearing agent used in all techniques, including home whitening, is hydrogen peroxide (H2O2) in different concentrations. In this study, the authors describe mechanisms of gel activation, the use of Laser and LED"s for teeth-bleaching, the importance of diagnosis and the comfort of the patient in in-office teeth-bleaching techniques.

  12. Retrospective study of 145 supernumerary teeth

    OpenAIRE

    Fernández Montenegro, Paula; Valmaseda Castellón, Eduardo; Berini Aytés, Leonardo; Gay Escoda, Cosme

    2006-01-01

    Objective: The goal of the present retrospective study is to describe the distribution of the supernumerary teeth in a population of patients that have been attended at the Public Clinic of the Department of Oral Surgery. Background: Supernumerary teeth and multiple hyperdontia are usually associated with different syndromes, such as Gardner syndrome, or with facial fissures; however, they can appear in patients without any pathology. Their prevalence oscillates to 0.5-3.8% in patients with p...

  13. Non-syndromic supernumerary teeth: report of a case with 6 supernumerary teeth

    Directory of Open Access Journals (Sweden)

    Taghibakhsh M

    2011-02-01

    Full Text Available "nBackground and Aims: Multiple supernumerary teeth are rare and often found in association with syndromes such as Gardner, Cleidocranial dysplasia and cleft lip and palate, with a much less chance for isolated"nnon-syndromic cases. The aim of this study was to report a case with 6 supernumerary teeth without syndromic association."nCase Report: The patient was a 33 year-old female, referred to oral diseases and diagnosis department with chief complaint of sensitivity to cold and hot food in right upper premolar region. Oral examination revealed 5 erupted lingually supernumerary teeth (four in mandibular and one in maxillary premolar region, respectively. Further panoramic radiography clarified an extra impacted tooth in the palatal region of left premolar maxillary area. All extra teeth had been appeared since the age of 17 during one year, as the patient claimed. Medical history and thorough clinical and paraclinical examinations were not significant except for the hypothyroidism, since 5 years ago. No other family member noticed to be the case. Based on our findings, a diagnosis of non-syndromic multiple supernumerary teeth was established."nConclusion: A thorough examination of each patient presented with supernumerary teeth, including panoramic and intraoral radiographic images may provide valuable information regarding accompanying syndromes and unerupted teeth. Early diagnosis is an essential step for orthodontic or surgical decisions making, preventing or avoiding worsening complications such as malocclusion, adjacent normal teeth delayed eruption or rotation, diasthema, cystic lesions and resorption of contiguous teeth.

  14. Straight, white teeth as a social prerogative.

    Science.gov (United States)

    Khalid, Abeer; Quiñonez, Carlos

    2015-06-01

    A distinguishing feature of North American society is preoccupation with self-image, as seen in the ritualistic nature of bodily practices aimed at constantly improving the body. Nowhere is this more apparent than in the prevailing fixation with straight, white teeth. While there is an ever-expanding literature on the sociology of body, very little has been written on teeth in this context. Using literature from anthropology, biology, dentistry, sociology and social psychology, this study attempts to answer: (1) Why have straight, white teeth become a beauty ideal in North American society? (2) What is the basis for this ideal? (3) How is this ideal propagated? It demonstrates that dental aesthetic tendencies are biologically, culturally and socially patterned. Concepts from the works of Pierre Bourdieu and Michel Foucault are used to illustrate how straight, white teeth contribute towards reinforcing class differences and how society exercises a disciplinary power on individuals through this ideal. It is concluded that modified teeth are linked to self and identity that are rooted in social structure. Moreover, teeth demonstrate the ways in which class differences are embodied and projected as symbols of social advantage or disadvantage. Implications on professional, public health, sociological and political levels are considered.

  15. Straight, white teeth as a social prerogative.

    Science.gov (United States)

    Khalid, Abeer; Quiñonez, Carlos

    2015-06-01

    A distinguishing feature of North American society is preoccupation with self-image, as seen in the ritualistic nature of bodily practices aimed at constantly improving the body. Nowhere is this more apparent than in the prevailing fixation with straight, white teeth. While there is an ever-expanding literature on the sociology of body, very little has been written on teeth in this context. Using literature from anthropology, biology, dentistry, sociology and social psychology, this study attempts to answer: (1) Why have straight, white teeth become a beauty ideal in North American society? (2) What is the basis for this ideal? (3) How is this ideal propagated? It demonstrates that dental aesthetic tendencies are biologically, culturally and socially patterned. Concepts from the works of Pierre Bourdieu and Michel Foucault are used to illustrate how straight, white teeth contribute towards reinforcing class differences and how society exercises a disciplinary power on individuals through this ideal. It is concluded that modified teeth are linked to self and identity that are rooted in social structure. Moreover, teeth demonstrate the ways in which class differences are embodied and projected as symbols of social advantage or disadvantage. Implications on professional, public health, sociological and political levels are considered. PMID:25923766

  16. Regenerative Endodontic Treatment versus Apical Plug in Immature Teeth: Three-Year Follow-Up.

    Science.gov (United States)

    Asgary, Saeed; Fazlyab, Mahta; Nosrat, Ali

    2016-01-01

    This report compares and evaluates the treatment outcomes of regenerative endodontic treatment and apical plug as two accepted treatment protocols in a pair of necrotic immature maxillary central incisors of a 12-year old female. The patient was referred complaining of a dull pain and swelling in her upper lip area. She had a history of trauma to the anterior maxilla two years earlier. Both teeth were clinically diagnosed with pulp necrosis and periapical radiographs revealed that separate periapical radiolucent lesions surrounded the immature apices of both teeth. The left and right incisors were treated with apical plug and regenerative endodontic treatment, respectively, using calcium-enriched mixture (CEM) cement. The patient was followed-up for three years. During this period, both teeth were clinically asymptomatic and showed complete radiographic healing of the periapical lesions. The right central incisor showed root development. No tooth discoloration was evident. Apexification by apical plug placement and pulp regeneration are both reliable treatments for immature non-vital teeth. In order to choose the right treatment the advantages of either technique should be weighed against its drawbacks. CEM cement can be successfully applied for both purposes. This biomaterial causes less discoloration of the tooth. PMID:27617375

  17. Reattachment of fractured teeth fragments in mandibular incisors: a case report.

    Science.gov (United States)

    Yousef, Mohammed K

    2015-01-01

    The majority of dental trauma involves anterior teeth, especially the maxillary central incisors. A mandibular incisor fracture with or without pulp tissue involvement is considerably less common. Different approaches for treating these fractured teeth have been reported in the literature. The type of treatment rendered depends mainly on the extent of fracture, pulp involvement, radicular fracture, biologic width infringement or violation, and presence of the fractured piece. This case report illustrates reattachment of fractured fragments on two mandibular incisors without pulp exposure using a new proposed reattachment method using a combination of two different types of composite materials together with an orthodontic lingual retention wire. An 8-year-old female patient presented with fractured mandibular left incisors (Ellis class II fracture). Broken pieces were saved and brought in a closed container in water. Periapical radiographs revealed no evidence of pulpal involvement in either tooth and no periapical radiolucency was noticed. Fractured fragments and the broken teeth were prepared with circumferential bevels. Reattachment of the fractured fragments were done using two types of composite resin materials and a lingual orthodontic retention wire was also used. The patient was recalled after 8 months to follow up both teeth. Clinical examination revealed excellent composite restorations covering the fracture lines.

  18. What are the longevities of teeth and oral implants?

    DEFF Research Database (Denmark)

    Holm-Pedersen, Poul; Lang, Niklaus P; Müller, Frauke

    2007-01-01

    To analyse tooth loss and to evaluate the longevity of healthy teeth and teeth compromised by diseases and influenced by therapy as well as that of oral implants.......To analyse tooth loss and to evaluate the longevity of healthy teeth and teeth compromised by diseases and influenced by therapy as well as that of oral implants....

  19. Occlusal relationships and spacing or crowding of teeth in the dentitions of 3-4-year-old Nigerian children.

    Science.gov (United States)

    Otuyemi, O D; Sote, E O; Isiekwe, M C; Jones, S P

    1997-09-01

    A study of 525 3-4-year-old children in nursery schools and day-care centres was carried out to assess occlusal relationships and the presence of spacing or crowding of teeth. No significant differences in occlusal relationships were found between boys and girls (P > 0.05). Bilateral straight terminal planes of molars and class 1 canine relationship were the most prevalent features (74.5% and 73.3% respectively). Most of the children had 'normal' vertical and transverse occlusal relationships. The most common sites of spacing were mesial to maxillary canines and distal to mandibular canines. 32% of the children were found to have generalized anterior segment spacing, 4% showed exclusively anthropoid spaces, and 18% had either contact between all the teeth or crowding in the anterior region.

  20. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases.

    Science.gov (United States)

    Jain, Anshul; Baliga, Shridhar

    2015-07-01

    The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses. Herein, two cases are presented where implant placement was done for upper anterior teeth, which were traumatized or avulsed following maxillofacial trauma. Both patients demonstrated a history of maxillofacial trauma and had undergone open reduction and internal fixation. The first patient had a severe maxillary alveolar defect treated via autogenous bone grafting and a six-month period was given for proper integration of the bone graft. The second patient was a smoker with very poor oral hygiene and a deep bite. Thus, implant placement was not initially justified. PMID:26877745

  1. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases

    Directory of Open Access Journals (Sweden)

    Anshul Jain

    2016-01-01

    Full Text Available The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses.Herein, two cases are presented where implant placement was done for upper anterior teeth, which were traumatized or avulsed following maxillofacial trauma. Both patients demonstrated a history of maxillofacial trauma and had undergone open reduction and internal fixation. The first patient had a severe maxillary alveolar defect treated via autogenous bone grafting and a six-month period was given for proper integration of the bone graft. The second patient was a smoker with very poor oral hygiene and a deep bite. Thus, implant placement was not initially justified.

  2. Congenitally missing teeth (hypodontia): A review of the literature concerning the etiology, prevalence, risk factors, patterns and treatment

    Science.gov (United States)

    Rakhshan, Vahid

    2015-01-01

    Congenitally missing teeth (CMT), or as usually called hypodontia, is a highly prevalent and costly dental anomaly. Besides an unfavorable appearance, patients with missing teeth may suffer from malocclusion, periodontal damage, insufficient alveolar bone growth, reduced chewing ability, inarticulate pronunciation and other problems. Treatment might be usually expensive and multidisciplinary. This highly frequent and yet expensive anomaly is of interest to numerous clinical, basic science and public health fields such as orthodontics, pediatric dentistry, prosthodontics, periodontics, maxillofacial surgery, anatomy, anthropology and even the insurance industry. This essay reviews the findings on the etiology, prevalence, risk factors, occurrence patterns, skeletal changes and treatments of congenitally missing teeth. It seems that CMT usually appears in females and in the permanent dentition. It is not conclusive whether it tends to occur more in the maxilla or mandible and also in the anterior versus posterior segments. It can accompany various complications and should be attended by expert teams as soon as possible. PMID:25709668

  3. Rehabilitation of Avulsed Teeth in Fractured Jaws via Bone Grafting and Implant Placement: Report of Two Cases

    OpenAIRE

    Anshul Jain; Shridhar Baliga

    2015-01-01

    The maxillofacial region is one of the most injury-prone areas during road traffic accidents, personal violence, falls and sports. Maxillofacial trauma can lead to breakage or avulsion of upper anterior teeth, which may cause significant aesthetic and functional problems. There are many treatment options available for rehabilitation including removable partial dentures, fixed partial dentures, crown and bridges and implant-supported prostheses.Herein, two cases are presented where implant pla...

  4. The anterior cingulate cortex

    Directory of Open Access Journals (Sweden)

    Pavlović D.M.

    2009-01-01

    Full Text Available The anterior cingulate cortex (ACC has a role in attention, analysis of sensory information, error recognition, problem solving, detection of novelty, behavior, emotions, social relations, cognitive control, and regulation of visceral functions. This area is active whenever the individual feels some emotions, solves a problem, or analyzes the pros and cons of an action (if it is a right decision. Analogous areas are also found in higher mammals, especially whales, and they contain spindle neurons that enable complex social interactions. Disturbance of ACC activity is found in dementias, schizophrenia, depression, the obsessive-compulsive syndrome, and other neuropsychiatric diseases.

  5. A Novel Approach to Regain Anterior Space Using Modified 2 by 3 Fixed Appliance: A Report of Two Cases.

    Science.gov (United States)

    Mohammad, Ziauddin; Cheruku, Sampath Reddy; Penmetcha, Sarada; Bagalkotkar, Apeksha; Kumari, Surabhi

    2015-10-01

    Early loss of permanent anterior teeth in growing children has a psychological impact on the child. Anterior teeth are important both aesthetically and functionally. When a permanent tooth is lost, the teeth adjacent to the created space tend to migrate into the space resulting in the space loss. Management of regaining space with the removable appliance always depends on child cooperation for using the appliance as well as for the recall visits. The advantages of fixed appliances over the removable appliances are minimal discomfort, reduced need for patient cooperation and increased control of tooth movements in all three directions of space. Thus, a short course of fixed appliance like the modified 2 by 3 fixed appliance followed by fixed functional space maintainer could be an ideal treatment option for such cases.

  6. Rare occurrence of bilaterally impacted mandibular supernumerary teeth

    OpenAIRE

    Vinay Kumar Bhardwaj; Jai Ram Kaundal; Anil Chug; Sanjeev Vaid; Abhishek Soni; Mohinder Chandel

    2012-01-01

    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 bilater...

  7. The evaluation of the carbon fiber post system on restoration of teeth defect in children

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xiang-hao; WANG Xin-zhi

    2006-01-01

    Background Post and post-core systems are used to restore extensively damaged teeth. Among these systems,cast alloy post and core, prefabricated threaded alloy post and prefabricated simple alloy post are most frequently applied in China nowadays. In Europe and North America a combined application of the fiber post, resin-core and crown has been applied to restore seriously destructed teeth with satisfactory results in recent years. This study was intended to evaluate the clinical effect of carbon fiber post system on restoration of child anterior tooth defect after root canal therapy, based on 3- 5 years' observation.Methods One hundred and six children with incompletely established occlusion were observed and followed for an average of 42 months (ranging from 36 to 60 months). Eighty-five upper teeth and forty-one lower teeth were restored with carbon fiber post system and composite jacket crown. Periodic check-up was conducted for periodontal condition and restoration effect.Results One hundred and twenty-one (96.2%) restorations were successful. Four jacket crowns (3.0%) were lost. One tooth (0.8%) had slight gingival inflammation. Tooth root or post fracture and gingival stain were not observed. X-ray showed there was no obvious change in aspects including the width of periodontal membrane,the density of alveolar bone and the height of alveolar ridge crest.Conclusions Carbon-fiber post system can satisfy the clinical requirements of young patients who have residual anterior crown and root caused by trauma or caries, and have incomplete occlusion and have completed root canal therapy. This system helps realize good esthetic result for patients and easy practice for dentists.Carbon fiber post is safe and convenient, especially for sick children.

  8. [Different multidisciplinary approaches of two traumatic teeth fractures in the esthetic zone: a case report].

    Science.gov (United States)

    Jia, Xue-ting; Zhen, Min; Hu, Wen-jie; Liu, Yun-song

    2015-10-18

    In this article, different methods to deal with teeth fractures were discussed by presenting a case of traumatic crown-root fracture in the anterior esthetic zone. The traumatic crown-root fracture is a common problem in clinic. When a fracture line locates in close proximity to or below the alveolar bone crest, the fracture most likely involve the junctional epithelium and the connective tissue attachment. This type of fracture becomes a challenge for restorative dentists because it involves biologic, functional, and esthetic considerations, especially when the fracture occurs in an esthetic area. In this case, a young patient presented with two fractured upper anterior teeth to the Department of Periodontics, Peking University School and Hospital of Stomatology. After the comprehensive clinical evaluation, the right central incisor was decided to extract for implant therapy and the right lateral incisor was decided to retain by one modified crown lengthening surgery. The most common technique applied to save a retained root is a clinical crown lengthening procedure. However, the aggressive alveolar bone resection of both target and adjacent teeth to reestablish the bone width and periodontal health may compromise functional and esthetic outcomes. To reduce loss of excessive osseous tissue during osteotomy procedure, the modified crown lengthening of the right lateral incisor was performed, including minor bone resection and root reshaping. Regarding the right central incisor, the retained root was all located below the alveolar bone crest. The extraction and implant procedure, combined with guided bone graft were performed to avoid the damage to neighbor teeth during traditional restorative therapy and to reshape a preferable buccal contour. At the last visit, the patient was recalled with healthy periodontium, normal tooth function and favorable esthetic results.

  9. Forensic identification in teeth with caries.

    Science.gov (United States)

    Alia-García, Esther; Parra-Pecharromán, David; Sánchez-Díaz, Ana; Mendez, Susy; Royuela, Ana; Gil-Alberdi, Laura; López-Palafox, Juan; del Campo, Rosa

    2015-12-01

    Human teeth are biological structures that resist extreme conditions thus becoming a useful source of DNA for human forensic identification purposes. When it is possible, forensic prefer only non-damaged teeth whereas those with cavities are usually rejected to avoid both external and internal bacterial contamination. Cavities are one of the most prevalent dental pathology and its incidence increases with ageing. The aim of this study was to validate the use of teeth with cavities for forensic identification. A total of 120 individual teeth from unrelated patients (60 healthy and 60 with cavities, respectively) extracted by a dentist as part of the normal process of treatment, were submitted for further analysis. Dental pulp was obtained after tooth fragmentation, complete DNA was extracted and the corresponding human identification profile was obtained by the AmpFlSTR® NGM SElect™ kit. Cariogenic microbiota was determined by PCR-DGGE with bacterial universal primers and bands were excised, re-amplified and sequenced. From the 120 dental pieces analyzed, a defined genetic profile was obtained in 81 (67.5%) of them, with no statistical differences between the healthy and the cavities-affected teeth. Statistical association between teeth status, DNA content and genetic profiles was not observed. Complex bacterial communities were only detected in the cavities group, being the Streptococcus/Enterococcus, and Lactobacillus genera the most represented. We conclude that teeth with cavities are as valid as healthy dental pieces for forensic human identification. Moreover, the severity of the cariogenic lesion as well as associated bacterial communities seems not to influence the establishment of human dental profiles. PMID:26386340

  10. Miniplacas permitem tratamento eficiente e eficaz da mordida aberta anterior Miniplates allow efficient and effective treatment of anterior open bites

    Directory of Open Access Journals (Sweden)

    Jorge Faber

    2008-10-01

    Full Text Available INTRODUÇÃO: o tratamento das deformidades e más oclusões que incluem mordidas abertas anteriores foi uma das primeiras aplicações de miniplacas como forma de ancoragem ortodôntica. A implementação desse sistema de tratamento reduz o número de pacientes indicados para a cirurgia ortognática e simplifica muitos problemas. Nessa abordagem, os dentes posteriores são intruídos e a mandíbula sofre um giro no sentido anti-horário, diminuindo a altura facial inferior e projetando os pogônios de tecidos duro e mole. OBJETIVO: o presente artigo apresenta os fundamentos da mecânica ortodôntica para correção da mordida aberta anterior e os ilustra com uma série de casos clínicos.INTRODUCTION: The treatment of facial deformities and malocclusions, such as anterior open bite, was one of the first applications of miniplates for orthodontic anchorage. The use of this treatment system reduces the number of patients referred to orthognathic surgery and simplifies many problems. This approach applies intrusive forces to posterior teeth, and the mandible undergoes counterclockwise rotation, which decreases lower facial height and advances the projection of hard and soft tissue pogonions. OBJECTIVE: This study describes the principles of orthodontic mechanics in the correction of anterior open bite and illustrates these principles with a series of cases.

  11. An analysis on forced eruption in crown lengthening of un-restorable teeth

    Directory of Open Access Journals (Sweden)

    Vahid A

    2004-07-01

    Full Text Available Cervical third root defects, like perforations (due to resoption or iatrogeic, fractures or invasive decays make great difficulties for appropriate restoration making. In these circumstances crown lengthening is needed, especially for anterior teeth. Forced eruption also could be a beneficial treatment. By this therapy, cervical third root defects will be available to receive a good restoration. without gum and biologic width problems. In this article tried to introduce this method of therapy by reviewing litraure and with regard to personal research.

  12. Immediate Esthetic Rehabilitation of Periodontally Compromised Anterior Tooth Using Natural Tooth as Pontic

    Directory of Open Access Journals (Sweden)

    K. Pavan Kumar

    2016-01-01

    Full Text Available For patients who require removal of anterior teeth and their replacement various treatment modalities are available. With advancement in technology and availability of glass/polyethylene fibres, use of natural tooth as pontic with fibre reinforced composite restorations offers the promising results. The present case report describes management of periodontally compromised mandibular anterior tooth using natural tooth pontic with fibre reinforcement. A 1-year follow-up showed that the bridge was intact with good esthetics and no problem was reported.

  13. Clinical research of teeth damage from radiotherapy

    International Nuclear Information System (INIS)

    Objective: To analyze various factors inducing teeth damage from radiotherapy and the preventive and treatment methods. Methods: One hundred cases of patients treated by radiotherapy were divided into two groups. In group one there were 60 cases whose teeth were irradiated during treatment; in group two there were 40 cases whose teeth were not irradiated during treatment. Results: The caries incidence was 60% for group one and 15% for group two (P<0.01). By auto-control in 15 patients, the caries incidence on the sick side was obviously higher than that of the healthy side. Hundred percent caries incidence was found in 6 cases who received a dosage of 70 Gy. Conclusion: The authors believe that radiation damage to the teeth is associated with the following factors: 1. The dosage and location of irradiation are closely related to caries incidence; 2. The active dentinoblasts are very sensitive to radiation; 3. Damage to the salivary glands from radiotherapy can result in reduction of salvia and pH value, leading to a high growth rate of Streptococcus mutans. Following preventive measures could be considered in future cases: to apply a caries prevention coating or protective dental crown and TPS, to adjust the dose and time of irradiation, to select conformal radiotherapy technique. The key points for protecting the teeth and salivary gland from caries and damage are protection of the proliferation ability of pulp cells, anti-inflammation, promotion of microcirculation, and strengthening body resistance

  14. Anterior crossbite correction in primary and mixed dentition with removable inclined plane (Bruckl appliance).

    Science.gov (United States)

    Jirgensone, Irena; Liepa, Andra; Abeltins, Andris

    2008-01-01

    Anterior crossbite correction in early mixed dentition is highly recommended as this kind of malocclusion do not diminish with age. Uncorrected anterior crossbite may lead to abnormal wear of the lower incisors, dental compensation of mandibular incisors leading to thinning of labial alveolar plate and/or gingival recession. There are several methods for solving this problem. In this article we would like to describe removable inclined plane. This is a removable simple functional appliance on the lower arch (jaw), which works as inclined plane. One of the advantage of the Bruckl appliance is that it can also be used as retention appliance after active treatment as well as it is possible to add acrylic teeth if necessary. Therefore it can be used as a removable partial denture in lower jaw in case where there is a premature loss of the primary teeth. The use of this appliance is illustrated with three cases.

  15. Esthetic Rehabilitation of a Severely Compromised Anterior Area: Combined Periodontal and Restorative Approach

    Directory of Open Access Journals (Sweden)

    Rachele Censi

    2014-01-01

    Full Text Available The complete oral rehabilitation of patients demanding a beautiful and attractive smile involves a multidisciplinary approach that includes the change of both the morphological aspect of the teeth and the architecture of gum tissues. This clinical report describes a successful interdisciplinary approach for the treatment of an esthetically compromised dentition. In a first phase, the periodontal plastic surgery was performed for root coverage and, in particular, it was decided for the execution of a coronally advanced flap for the treatment of multiple recession defects. Once complete healing of soft tissues was obtained, six lithium disilicate veneers were placed over the anterior maxillary teeth. Lithium disilicate is a glass-based ceramic which presents excellent aesthetics and allows the passage of light without creating unnatural reflections. This feature has made it possible to recreate a natural aspect of teeth that in combination with the harmonic architecture of soft tissue has permitted obtaining a beautiful and pleasant smile.

  16. Changes in shape of posterior parts of upper jaws after extraction of teeth and prosthetic treatment.

    Science.gov (United States)

    Berg, H; Carlsson, G E; Helkimo, M

    1975-09-01

    Changes in the sagittal and transverse profiles of the anterior and posterior parts of the alveolar process after extraction of all teeth and insertion of immediate dentures were studied during a five-year period using casts of 14 patients. The casts were oriented in a uniform way with the help of reference points in the hard palate. The desired profiles could then be reproduced with a special tracing apparatus. Four profiles made during the five-year period were compared for each patient. Changes in shape of the upper jaws in the median sagittal plane agreed well with the results obtained in earlier investigations and showed a reduction of the anterior part of the alveolar process for each patient. In the posterior part of the upper jaw, on the other hand, an increase in size was seen in the transverse section of the alveolar process in most patients examined.

  17. Supernumerary teeth: case report and literature review

    International Nuclear Information System (INIS)

    Supernumerary teeth (ST) have been an anomaly of tooth development, this is refered to the increase in the number of pieces in the normal dentition. It can be unique, multiple, unilateral or bilateral, normal or altered form; appear erupted, impacted or retained. Both dentitions are affected, but is most common in the permanent. The literature review has covered and mentioned spanned supernumerary teeth, the definition, etiology, characteristics and classification according to number, position and shape; as diagnose, alterations or clinical sequelae - eruptive associated with them and possible treatments to be done when it occurs. The presence of mechanical accidents have been a frequent complication, within this, displacement of adjacent teeth has been the most common; is associated with different syndromes such as lip and palate cleft; however, they can not be related with pathologies; being mesiodens the most frequent. (author)

  18. Rotary endodontics in primary teeth - A review.

    Science.gov (United States)

    George, Sageena; Anandaraj, S; Issac, Jyoti S; John, Sheen A; Harris, Anoop

    2016-01-01

    Endodontic treatment in primary teeth can be challenging and time consuming, especially during canal preparation, which is considered one of the most important steps in root canal therapy. The conventional instrumentation technique for primary teeth remains the "gold-standard" over hand instrumentation, which makes procedures much more time consuming and adversely affects both clinicians and patients. Recently nickel-titanium (Ni-Ti) rotary files have been developed for use in pediatric endodontics. Using rotary instruments for primary tooth pulpectomies is cost effective and results in fills that are consistently uniform and predictable. This article reviews the use of nickel-titanium rotary files as root canal instrumentation in primary teeth. The pulpectomy technique is described here according to different authors and the advantages and disadvantages of using rotary files are discussed.

  19. Supernumerary teeth vary depending on gender.

    Science.gov (United States)

    Küchler, Erika Calvano; Costa, Adriana Gomes da; Costa, Marcelo de Castro; Vieira, Alexandre Rezende; Granjeiro, José Mauro

    2011-01-01

    The presence of supernumerary teeth (ST) is a dental developmental anomaly of patterning and morphogenesis. Its variability of morphology, location and developmental timing can shed light on its etiology. In this work we report ST patterns. Orthopantomograms of 1,166 pediatric subjects were examined and the morphology, location and timing of the formation of ST were determined. The frequency of supernumerary teeth in the studied population was 2.3% (n = 27). Twenty-five subjects presented one ST. Maxilla midline was the most commonly affected region (nine cases). We noted high incidence of conical morphology in the midline region. Only teeth with tuberculate morphology presented delayed formation. ST in the midline region occurred more often in males whereas ST in the incisor region were more common in females. In conclusion, ST patterns vary depending on gender. PMID:21359454

  20. Supernumerary teeth vary depending on gender

    Directory of Open Access Journals (Sweden)

    Erika Calvano Küchler

    2011-02-01

    Full Text Available The presence of supernumerary teeth (ST is a dental developmental anomaly of patterning and morphogenesis. Its variability of morphology, location and developmental timing can shed light on its etiology. In this work we report ST patterns. Orthopantomograms of 1,166 pediatric subjects were examined and the morphology, location and timing of the formation of ST were determined. The frequency of supernumerary teeth in the studied population was 2.3% (n = 27. Twenty-five subjects presented one ST. Maxilla midline was the most commonly affected region (nine cases. We noted high incidence of conical morphology in the midline region. Only teeth with tuberculate morphology presented delayed formation. ST in the midline region occurred more often in males whereas ST in the incisor region were more common in females. In conclusion, ST patterns vary depending on gender.

  1. Clinical Report of 1 Cases of Monozygotic Twins Supernumerary Teeth%单卵双胞胎兄弟额外牙1例

    Institute of Scientific and Technical Information of China (English)

    杨春敏

    2014-01-01

    额外牙是指牙数目异常,其发生可能来自形成过多的牙蕾,也可能是牙胚分裂而成。临床上最多见的是上前牙区单颗多生牙。单卵双胞胎同患多生牙未见报道,同时含有2颗或多颗多生牙者更少见。近日笔者遇到一对双胞胎兄弟,因上前牙区多生牙影响美观前来就诊,由此正确的诊断及时拔除额外牙具有临床意义。%Supernumerary tooth is tooth abnormalities, which may be derived from the formation of excessive tooth bud, may also be split into tooth germ. Clinical go up to see at most is the anterior teeth area single supernumerary teeth. Monozygotic twins with supernumerary teeth is not reported, while containing two or more supernumerary teeth are more rare. I recently met a pair of twin brothers, because to supernumerary teeth appearance came to visit, report as fol ows now.Because the forward supernumerary teeth af ect the appearance to come round to see a doctor, the clinical significance of the correct diagnosis and timely removal of supernumerary teeth. Report as fol ows now.

  2. Personal Factors Determining Patient Satisfaction with All-Ceramic Crown Treatment for Single Anterior Teeth.

    Science.gov (United States)

    Zou, Yun; Zhan, DeSong

    2016-01-01

    The Eysenck Personality Questionnaire's (EPQ) N value (neuroticism) was used to evaluate information from 158 patients before ceramic crown treatment. Patient satisfaction was also evaluated using a satisfaction questionnaire 2 weeks post treatment. Patient expectations were not correlated with sex, age, or N value, and sex was not correlated with patient satisfaction other than in relation to crown shape. Total esthetic satisfaction and feature improvement were positively correlated with age, while satisfaction for five specific criteria was negatively correlated with N value and overall expectation. These observations underscore the importance of considering the physical and psychologic aspects of patient care when planning dental treatment. PMID:27611752

  3. Assesment of gingival microcirculation in anterior teeth using laser Doppler flowmetry

    Science.gov (United States)

    Canjau, Silvana; Miron, Mariana I.; Todea, Carmen D.

    2016-03-01

    Introduction: Evaluating the health status of the gingival tissue represents an important objective in the daily practice. Inflammation changes the microcirculatory and micromorphological dynamics of human gingiva. Aim: The purpose of this study was to evaluate the microcirculation in subjects with moderate gingivitis and healthy gingiva by using laser Doppler flowmetry (LDF). Material and Methods: Recordings of the gingival microcirculation (GM) were taken from 20 healthy gingival sites and from 20 sites with moderate gingivitis. The gingival blood flows in the gingivitis group before treatment was significantly different from those in the healthy gingiva group. Signals were recorded with the aid of a laser Doppler MoorLab instrument VMS-LDF2 probe VP3 10 mm S/N 2482. Three consecutive determinations of the GM were registered for each site, as follows: before the initial therapy, at 24 hours after the initial therapy and then, 7 days after the initial therapy. The data were processed using the statistical analysis software SPSS v16.0.1. Results: The results of this preliminary study showed statistically significant differences among the GM values recorded before and after the initial therapy. Conclusions: LDF could be a useful, noninvasive, sensitive, reproducible, and harmless method for measuring gingival blood flow (gingival microcirculation) in humans.

  4. The scalpel finishing technique: a tooth-friendly way to finish dental composites in anterior teeth.

    Science.gov (United States)

    Kup, Elaine; Tirlet, Gil; Attal, Jean-Pierre

    2015-01-01

    Optimal results can be obtained on direct restorations by the application of layering procedures that combine the accurate morphological insertion of restorative materials with the knowledge of the optical and mechanical properties of both composite resin and natural hard dental tissue. Even if the finishing procedures on restorations, such as margination (the trimming of margins), are minimized by anatomical layering techniques, finishing can still be highly complicated due to a number of pre-finishing sequences using specific instruments proposed in the literature, which include finishing burs and abrasive discs. Finishing procedures performed with a scalpel on polymerized direct composite restorations can improve the quality of the final sculptured surface by developing natural contours and characteristics and by removing the excess restorative material at the tooth-structure margin. Enhanced movement control and fine fingertip perception of the surface texture while moving the scalpel blade allow the operator to detect and cut the excess composite material during the margination procedure and to refine the final anatomy. Avoiding the use of finishing burs during finishing procedures on direct composite restorations may save adjacent enamel surfaces from abrasive damage. The composite surface and margins may also benefit from using the scalpel finishing technique, considering the potential risk of excess removal and surface crazing that the improper use of finishing burs could cause to composite material. The purpose of this article is to propose and describe the scalpel finishing technique step by step, as well as to briefly discuss the advantages of its application within the limits of a clinical case report.

  5. Esthetic Rehabilitation of Anterior Teeth with Porcelain Laminates and Sectional Veneers

    NARCIS (Netherlands)

    Gresnigt, Marco; Ozcan, Mutlu

    2011-01-01

    Full-coverage bonded porcelain restorations offer predictable treatment options in dentistry, but a certain amount of tooth material must be removed to allow space for the required thickness of the restorative material. Laminate veneers and inlays are considered minimally invasive, but they also req

  6. The dynamic relationship between pathological migrating teeth and periodontal disease

    Directory of Open Access Journals (Sweden)

    Surekha R Rathod

    2013-01-01

    Full Text Available Background: Pathologic migration is defined as change in tooth position resulting from disruption of the forces that maintain teeth in normal position in relation to their arch. The disruption of equilibrium in tooth position may be caused by several etiologic factors. So, the aim of the study was to evaluate the pathologic tooth migration (PTM in the upper anterior sextant and its relationship with predisposing and external factors such as bone loss, tooth loss, gingival inflammation, age, parafunctions, lingual interposition in the tongue thrust, and oral habits. Aim: The aim of the study was to evaluate the PTM in the upper anterior sextant and its relationship with predisposing and external factors such as bone loss, tooth loss, gingival inflammation, age, parafunctions, lingual interposition in the tongue thrust, and oral habits. Materials and Methods: The study sample consisted of 100 subjects of both sexes, with age ranging from 19 to 72 years. The probing pocket depth and gingival index were recorded for each patient. Competency of lips was also evaluated as competent or incompetent. Habits such as tongue thrusting, nail biting, and lip sucking were evaluated in relation to pathological migration of the tooth. Results: The results showed that no single factor by itself is clearly associated with PTM. As bone loss increases, the association of PTM with additional factors such as tooth loss and gingival inflammation increases. Conclusion: Further studies would be of great help to identify under which circumstances PTM is reversible according to the influence of gingival inflammation, malocclusion, and other factors. This information would contribute to a better understanding of some biological implications of the so-called minor tooth movement.

  7. Anterior hip pain.

    Science.gov (United States)

    O'Kane, J W

    1999-10-15

    Anterior hip pain is a common complaint with many possible causes. Apophyseal avulsion and slipped capital femoral epiphysis should not be overlooked in adolescents. Muscle and tendon strains are common in adults. Subsequent to accurate diagnosis, strains should improve with rest and directed conservative treatment. Osteoarthritis, which is diagnosed radiographically, generally occurs in middle-aged and older adults. Arthritis in younger adults should prompt consideration of an inflammatory cause. A possible femoral neck stress fracture should be evaluated urgently to prevent the potentially significant complications associated with displacement. Patients with osteitis pubis should be educated about the natural history of the condition and should undergo physical therapy to correct abnormal pelvic mechanics. "Sports hernias," nerve entrapments and labral pathologic conditions should be considered in athletic adults with characteristic presentations and chronic symptoms. Surgical intervention may allow resumption of pain-free athletic activity. PMID:10537384

  8. Stability of maxillary anterior crowding treatment Estabilidade do tratamento de apinhamento anterossuperior

    OpenAIRE

    Camila Leite Quaglio; Karina Maria Salvatore de Freitas; Marcos Roberto de Freitas; Guilherme Janson; José Fernando Castanha Henriques

    2012-01-01

    OBJECTIVE: To evaluate the stability and the relapse of maxillary anterior crowding treatment on cases with premolar extraction and evaluate the tendency of the teeth to return to their pretreatment position. METHODS: The experimental sample consisted of 70 patients of both sex with an initial Class I and Class II maloclusion and treated with first premolar extractions. The initial mean age was 13,08 years. Dental casts' measurements were obtained at three stages (pretreatment, posttreatment ...

  9. Placement of Dental Implant in a Knife Edge Ridge in Anterior Aesthetic Zone

    OpenAIRE

    Rajput, Narpat Singh; Bhaskar, J.; Valiathan, Mohan; Chandrasekaran, S.C.; Alam, Md.Nazish

    2013-01-01

    Dental implants are established alternatives for replacing missing teeth. Dental implants are artificial tooth root, positioned in the jaw bone, in order to sustain the replacement tooth or bridge. Recent advance in dental implant technology has made it more convenient, efficient and affordable for patients. In the anterior maxilla, esthetic demands not only require well-anchored implants but also sufficient soft and hard tissue in order to achieve natural looking result. Augmentation of the ...

  10. Single Anterior Tooth Replacement by a Cast Lingual Loop Connector - A Conservative Approach

    OpenAIRE

    Dandekeri, Shilpa Sudesh; Dandekeri, Savita

    2014-01-01

    One of the most challenging and complex treatment modality is replacement of single anterior tooth. This can be overcome by different treatment options such as implant-supported restorations as well as conventional porcelain-fused-to-metal and resin-bonded fixed partial dentures. Drifting of teeth into the edentulous area may reduce the available pontic space; whereas a diastema existing before an extraction may result in excessive mesiodistal dimension to the pontic space. Loop connector fix...

  11. Endodontic management of immature teeth with spontaneous apical closure and periapical lesions: case series and review of the literature.

    Science.gov (United States)

    Çalışkan, Mehmet Kemal; Kaval, Mehmet Emin

    2015-08-01

    Spontaneous apical closure in non-vital immature teeth has been rarely encountered and outcome of non-surgical endodontic treatment of related teeth associated with periapical lesions has not yet been adequately elucidated. The aim of this article was to report endodontic management of spontaneous apical closure of infected untreated immature teeth with periapical lesions and to review previously proposed mechanisms for the development of spontaneous hard tissue barrier. Three patients were referred at different time intervals to the endodontic clinic for treatment of their maxillary anterior incisors with acute or chronic apical periodontitis. Dental histories indicated that related teeth had been subjected to trauma approximately 12-18 years previously. Radiographically, the involved teeth exhibited incomplete root formation with spontaneous apical closure and were associated with an apical radiolucency. After biomechanical preparation, calcium hydroxide paste was applied and was changed once or twice within 3 months. All canals were then filled with gutta-percha and AH Plus and the follow-up period was 16-50 months; both clinical and radiographic examinations revealed adequate function, the absence of clinical symptoms and significant healing of the periapical radiolucency.

  12. Evaluation of technical quality and periapical health of root-filled teeth by using cone-beam CT

    Directory of Open Access Journals (Sweden)

    Bilge Gülsüm NUR

    2014-12-01

    Full Text Available Objective This study aimed to assess the quality of root fillings, coronal restorations, complications of all root-filled teeth and their association with apical periodontitis (AP detected by cone-beam computed tomography (CBCT images from an adult Turkish subpopulation. Material and Methods The sample for this study consisted of 242 patients (aging from 15 to 72 years with 522 endodontically treated teeth that were assessed for technical quality of the root canal filling and periapical status of the teeth. Additionally, the apical status of each root-filled tooth was assessed according to the gender, dental arch, tooth type and age classification, undetected canals, instrument fracture, root fracture, apical resorption, apical lesion, furcation lesion and type and quality of the coronal structure. Statistical analysis was performed using percentages and chi-square test. Results The success rate of the root canal treatment was of 54.4%. The success rates of adequate and inadequate root canal treatment were not significantly different (p>0.05. Apical periodontitis was found in 228 (45.6% teeth treated for root canals. Higher prevalence of AP was found in patients aging from 20 to 29 years [64 (27% teeth] and in anterior (canines and incisors teeth [97 (41% teeth]. Conclusions The technical quality of root canal filling performed by dental practitioners in a Turkish subpopulation was consistent with a high prevalence of AP. The probable reasons for this failure are multifactorial, and there may be a need for improved undergraduate education and postgraduate courses to improve the clinical skills of dental practitioners in endodontics.

  13. Computing Contact Stresses In Gear Teeth

    Science.gov (United States)

    Oswald, Fred B.; Somprakit, Paisan; Huston, Ronald L.

    1995-01-01

    Improved method of computing contact stresses in gear teeth accounts for complicating effects like those of static and sliding friction. Provides iterative procedure for determination of contact region and nodal contact forces along with contact stresses. Method based on equations and computational procedure incorporating these effects routinely.

  14. Do We Need National Standards with Teeth?

    Science.gov (United States)

    Usiskin, Zalman

    2007-01-01

    The author, director of the University of Chicago School Mathematics Project, tackles the following question: Should the United States have national standards with teeth, that is, a single set of standards tied to assessments and agreed to by the states? Proponents advance five main arguments for implementing such a standard. In his rebuttal, the…

  15. Set Someone's Teeth on Edge

    Institute of Scientific and Technical Information of China (English)

    江河

    2002-01-01

    有些人听到刺耳的声音,或尝到酸溜溜的滋味时,会被刺激得牙齿颤动。“Set someone's teeth on edge”的成语由此产生,解释为使某人不安、烦躁甚至咬牙切齿。

  16. Elephant teeth from the atlantic continental shelf

    Science.gov (United States)

    Whitmore, F.C., Jr.; Emery, K.O.; Cooke, H.B.S.; Swift, D.J.P.

    1967-01-01

    Teeth of mastodons and mastodons have been recovered by fishermen from at least 40 sites on the continental shelf as deep as 120 meters. Also present are submerged shorelines, peat deposits, lagoonal shells, and relict sands. Evidently elephants and other large mammals ranged this region during the glacial stage of low sea level of the last 25.000 years.

  17. Simulation of a flow around biting teeth

    Science.gov (United States)

    Narusawa, Hideaki; Yamamoto, Eriko; Kuwahara, Kunio

    2008-11-01

    We simulated a flow around biting teeth. The decayed tooth is a disease that a majority of people are annoyed. These are often generated from a deep groove at occlusal surface. It is known that a person who bites well doesn't suffer from a decayed tooth easily. Biting forces reach as much as 60 kg/cm^2 by an adult male, and when chewing, upper and lower teeth approach to bite by those forces. The crushed food mixed with saliva becomes high viscosity fluid, and is pushed out of ditches of teeth in the direction of the cheek or the tongue. Teeth with complex three dimension curved surface are thought to form venturi at this time, and to generate big pressure partially. An excellent dental articulation will possibly help a natural generation of a flow to remove dental plaque, i.e. the cause of the decayed tooth. Moreover, the relation of this flow with the destruction of the filled metal or the polymer is doubted. In this research, we try to clarify the pressure distributions by this flow generation as well as its dynamics when chewing. One of our goals is to enable an objective design of the shape of the dental fillings and the artificial tooth. Tooth has a very small uneven ground and a bluff body. In this case, to calculate a computational numerical simulation to solve the Navier-Stokes equations three dimension Cartesian coordinate system is employed.

  18. Teeth: Among Nature's Most Durable Biocomposites

    Science.gov (United States)

    Lawn, Brian R.; Lee, James J.-W.; Chai, Herzl

    2010-08-01

    This paper addresses the durability of natural teeth from a materials perspective. Teeth are depicted as smart biocomposites, highly resistant to cumulative deformation and fracture. Favorable morphological features of teeth at both macroscopic and microscopic levels contribute to an innate damage tolerance. Damage modes are activated readily within the brittle enamel coat but are contained from spreading catastrophically into the vulnerable tooth interior in sustained occlusal loading. Although tooth enamel contains a multitude of microstructural defects that can act as sources of fracture, substantial overloads are required to drive any developing cracks to ultimate failure—nature's strategy is to contain damage rather than avoid it. Tests on model glass-shell systems simulating the basic elements of the tooth enamel/dentin layer structure help to identify important damage modes. Fracture and deformation mechanics provide a basis for analyzing critical conditions for each mode, in terms of characteristic tooth dimensions and materials properties. Comparative tests on extracted human and animal teeth confirm the validity of the model test approach and point to new research directions. Implications in biomechanics, especially as they relate to dentistry and anthropology, are outlined.

  19. Anterior segment spectral domain optical coherence tomography imaging of patients with anterior scleritis.

    Science.gov (United States)

    Levison, Ashleigh L; Lowder, Careen Y; Baynes, Kimberly M; Kaiser, Peter K; Srivastava, Sunil K

    2016-08-01

    The purpose of the study was to describe the findings seen on anterior segment spectral domain optical coherence tomography (SD-OCT) in patients with anterior scleritis and determine the feasibility of using SD-OCT to image and grade the degree of scleral inflammation and monitor response to treatment. All patients underwent slit lamp examination by a uveitis specialist, and the degree of scleral inflammation was recorded. Spectral domain OCT imaging was then performed of the conjunctiva and scleral tissue using a standardized acquisition protocol. The scans were graded and compared to clinical findings. Twenty-eight patients with anterior scleritis and ten patients without ocular disease were included in the study. Seventeen of the scleritis patients were followed longitudinally. Common findings on SD-OCT in patients with active scleritis included changes in hyporeflectivity within the sclera, nodules, and visible vessels within the sclera. There was significant variation in findings on SD-OCT within each clinical grade of active scleritis. These changes on SD-OCT improved with treatment and clinical improvement. SD-OCT imaging provided various objective measures that could be used in the future to grade inflammatory activity in patients with anterior scleritis. Longitudinal imaging of patients with active scleritis demonstrated that SD-OCT may have great utility in monitoring response to treatment.

  20. Prevalence of congenitally missing permanent teeth in Iran

    Directory of Open Access Journals (Sweden)

    Mahnaz Sheikhi

    2012-01-01

    Conclusion: The prevalence of congenitally missing teeth (CMT in Iranian permanent dentition was 10.9%. The most common congenitally missing teeth were mandibular second premolar fallowed by maxillary second premolars.

  1. The large superpredators' teeth from Middle Triassic of Poland

    Science.gov (United States)

    Surmik, Dawid; Brachaniec, Tomasz

    2013-09-01

    An unusual large teeth, finding from time to time in marine sediments of Muschelkalk, Silesia, Poland indicate the superpredators occurrence. According to size and morphological features the teeth are similar to archosaurs or giant marine reptiles.

  2. Carisolv as an endodontic irrigant in deciduous teeth: An SEM study

    Directory of Open Access Journals (Sweden)

    Parul Singhal

    2012-01-01

    Full Text Available Aim: Root canal irrigation plays an important role in the debridement and disinfection of the root canal system. "The purpose of this study was to evaluate the efficacy of Carisolv TM , 1% sodium hypochlorite (NaOCl gel, and 1% NaOCl solution as root canal irrigants in deciduous anterior teeth." Materials and Methods: Thirty-six extracted deciduous anterior teeth were used. Root canals were flooded with NaOCl solution in Group A, NaOCl gel in Group B and Carisolv TM in Group C and incubated for 30 min. Scanning electron microscope photomicrographs of canal wall debris in the apical, middle and coronal thirds were scored. Results: The results showed that regardless of irrigation regime, canals were consistently cleaner in the coronal and middle thirds than in the apical thirds. NaOCl solution, NaOCl gel, and Carisolv TM had comparable activity at coronal third and middle third of root canals. At the apical third, NaOCl solution cleaned canals better than NaOCl gel and Carisolv TM . Carisolv TM cleaned debris better than NaOCl gel at the apical third. Conclusion: Carisolv TM can be used as an adjunct to root canal preparation.

  3. PIXE analysis of trace elements in cetacean teeth

    International Nuclear Information System (INIS)

    PIXE was adopted for analysis of trace elements in teeth of two species of cetaceans, sperm whale (Physeter microcephalus) and pantropical spotted dolphin (Stenella attenuata). The analyses were performed along with the growth layer of the teeth, which is formed annually, suitable for age determination. Mn, Fe, Cu, Zu and Sr were detected in the teeth of sperm whale and pantropical spotted dolphin. Among these trace elements, gradual increase was observed for Zn/Ca ratio in the sperm whale's teeth. (author)

  4. Efficacy of various eugenol and non-eugenol root canal sealers in the treatment of teeth with periapical radiolucent area--a clinical and radiological study.

    OpenAIRE

    Bal C; Sikri V; Agrawal R

    1990-01-01

    A clinical and radiological study was conducted to compare the efficacy of various eugenol containing Viz. Zinc oxide eugenol, CRCS and Rosen′s Cement and non eugenol containing sealers and N2 on forty eight non-vital anterior teeth, with a periapical radiolucent area of 1-7mm in diameter. The patients were recalled after 30,90,150 and 210 days On radiological examination after 210 days CRCS showed maximum decrease in periapical radiolucency from 4.39 mm. to 1.80mm. The teeth treated w...

  5. Microleakage in primary teeth restored by conventional or bonded amalgam technique.

    Science.gov (United States)

    Myaki, S I; Rodrigues, C R; Raggio, D P; Flores, T A; Matson, M R

    2001-01-01

    The aim of this in vitro study was to evaluate marginal leakage in class V restorations in primary teeth restored with amalgam, using three different techniques. Thirty maxillary anterior primary teeth, clinically sound and naturally exfoliated, were used. In group 1 (n = 10), two thin layers of a copal varnish (Cavitine) were applied. In group 2 (n = 10), Scotchbond Multi-Purpose Plus, a dual adhesive system, was used according to manufacturer instructions. In group 3 (n = 10), One-Step adhesive system in combination with a low-viscosity resin (Resinomer) were used according to manufacturer instructions. All samples were restored with a high-copper dental amalgam alloy (GS 80, SDI). After restoration, the samples were stored in normal saline at 37 degrees C for 72 h. The specimens were polished, thermocycled (500 cycles, 5 degrees and 55 degrees C, 30-s dwell time) and impermeabilized with fingernail polish to within 1.0 mm of the restoration margins. The teeth were then placed in 0.5% methylene blue for 4 h. Finally, the samples were sectioned and evaluated for marginal leakage. The Kruskal-Wallis test showed that the filled adhesive resin (group 3) had the least microleakage. There was no significant difference between groups 1 and 2.

  6. Dentinogenesis imperfecta - hardness and Young's modulus of teeth.

    Science.gov (United States)

    Wieczorek, Aneta; Loster, Jolanta; Ryniewicz, Wojciech; Ryniewicz, Anna M

    2013-01-01

    Dentinogenesis imperfecta type II (DI-II) is the most common dental genetic disease with reported incidence 1 in 8000. Elasticity and hardness of the enamel of teeth are important values which are connected with their resistance to attrition. It is hypothesized that values of physical properties for healthy teeth and teeth with DI-II are different. The aim of the study was to investigate some physical properties of teeth extracted from patients with DI-II in comparison with normal teeth. The material of the study was six teeth: three lower molars, with clinical signs of DI-II, which were extracted due to complications of pulp inflammation and three other lower molars which were extracted for orthodontic reasons - well formed, without any signs of pathology. The surfaces of DI-II and normal teeth were tested on the CSM Instruments Scratch Tester machine (producer CSEM Switzerland) by Oliver and Pharr method. The indenter used was Vicker's VG-73 diamond indenter. Additionally, the Scanning Electron Microscopy (SEM) analysis of the surface of the teeth with DI-II was made. Vickers hardness of the teeth with dental pathology (DI-II) was seven times smaller, and Young's modulus six times smaller than those of healthy teeth. The parameters of hardness and elasticity of enamel of teeth with clinical diagnosis of DI-II were very much smaller than in normal teeth and because of that can be responsible for attrition.

  7. Natal teeth in an infant with congenital hypothyroidism

    Directory of Open Access Journals (Sweden)

    C Venkatesh

    2011-01-01

    Full Text Available Teeth erupting at birth are referred to as natal teeth. It is a common and benign finding in the neonatal period. However, they may be associated with genetic syndromes like Ellis Van Creveld syndrome and Hallermann-Streiff syndrome. We report here a case of natal teeth in an infant with congenital hypothyroidism.

  8. Multidisciplinary management of anterior diastemata

    DEFF Research Database (Denmark)

    Furuse, Adilson Yoshio; Herkrath, Fernando José; Franco, Eduardo Jacomino;

    2007-01-01

    the aesthetic results when orthodontic therapy itself is not feasible. This article presents integrated orthodonticrestorative solutions of anterior diastemata, associated with the conditioning of the gingival tissue with composite resin, and discusses the most relevant aspects related to their etiology...

  9. Anterior approach for knee arthrography

    International Nuclear Information System (INIS)

    Objective. To develop a new method of magnetic resonance arthrography (MRA) of the knee using an anterior approach analogous to the portals used for knee arthroscopy.Design. An anterior approach to the knee joint was devised mimicking anterior portals used for knee arthroscopy. Seven patients scheduled for routine knee MRA were placed in a decubitus position and under fluoroscopic guidance a needle was advanced from a position adjacent to the patellar tendon into the knee joint. After confirmation of the needle tip location, a dilute gadolinium solution was injected.Results and conclusion. All the arthrograms were technically successful. The anterior approach to knee MRA has greater technical ease than the traditional approach with little patient discomfort. (orig.)

  10. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... Taperloc Microplasty stem and E-poly antioxidant-infused technology during a hip replacement through the anterior supine ... renewed interest at this time due to several advantages that it brings. The approach that is performed ...

  11. Anterior Approach Total Hip Replacement

    Medline Plus

    Full Text Available ... it to have any real negative or deleterious effect by removing the anterior capsule. Now I would ... is what happens with one of the competitive designs. Like I told you, I just take a ...

  12. Update on anterior ankle impingement

    OpenAIRE

    Vaseenon, Tanawat; Amendola, Annunziato

    2012-01-01

    Anterior ankle impingement results from an impingement of the ankle joint by a soft tissue or osteophyte formation at the anterior aspect of the distal tibia and talar neck. It often occurs secondary to direct trauma (impaction force) or repetitive ankle dorsiflexion (repetitive impaction and traction force). Chronic ankle pain, swelling, and limitation of ankle dorsiflexion are common complaints. Imaging is valuable for diagnosis of the bony impingement but not for the soft tissue impingemen...

  13. Anterior chamber depth during hemodialysis

    Directory of Open Access Journals (Sweden)

    Gracitelli CPB

    2013-08-01

    Full Text Available Carolina Pelegrini Barbosa Gracitelli,1 Francisco Rosa Stefanini,1 Fernando Penha,1 Miguel Ângelo Góes,2 Sérgio Antonio Draibe,2 Maria Eugênia Canziani,2 Augusto Paranhos Junior1 1Ophthalmology Department, 2Division of Nephrology, Federal University of São Paulo – UNIFESP, São Paulo, Brazil Background: Exacerbation of chronic glaucoma or acute glaucoma is occasionally observed in patients undergoing hemodialysis (HD because of anterior chamber depth changes during this therapy. Purpose: To evaluate anterior chamber depth and axial length in patients during HD sessions. Methods: A total of 67 eyes of 35 patients were prospectively enrolled. Axial length and anterior chamber depth were measured using ultrasonic biometry, and these measures were evaluated at three different times during HD sessions. Body weight and blood pressure pre- and post-HD were also measured. Results: There was no difference in the axial length between the three measurements (P = 0.241. We observed a significantly decreased anterior chamber depth (P = 0.002 during HD sessions. Conclusion: Our results support the idea that there is a change in anterior chamber depth in HD sessions. Keywords: anterior chamber, hemodialysis, axial length, acute angle-closure glaucoma

  14. Teaching parents to look after children's teeth.

    Science.gov (United States)

    Lloyd, S

    1994-03-01

    Children's toothpastes with fluoride help to prevent decay, but parents should ask their dentist before giving fluoride supplements to children. Overdosage is harmful. Sugars eaten as part of a meal do less harm to teeth than those eaten frequently as snacks. Sugar-free infant drinks and children's confectionery are now on the market and are more "tooth friendly". Look out for the "happy tooth" symbol. Babies can be registered with NHS dentists as soon as the first teeth start to come through, and should be taken regularly to the dentist throughout childhood. Under the NHS scheme, dentists are paid a capitation fee to provide continuing preventive care and treatment for children free of charge.

  15. Pulpectomy procedures in primary molar teeth

    Directory of Open Access Journals (Sweden)

    Hany Mohamed Aly Ahmed

    2014-01-01

    Full Text Available Premature loss of primary molars can cause a number of undesirable consequences including loss of arch length, insufficient space for erupting premolars and mesial tipping of the permanent molars. Pulpectomy of primary molar teeth is considered as a reasonable treatment approach to ensure either normal shedding or a long-term survival in instances of retention. Despite being a more conservative treatment option than extraction, efficient pulpectomy of bizarre and tortuous root canals encased in roots programmed for physiologic resorption that show close proximity to developing permanent tooth buds presents a critical endodontic challenge. This article aims to provide an overview of this treatment approach, including partial and total pulpectomy, in primary molar teeth. In addition, the recommended guidelines that should be followed, and the current updates that have been developed, while commencing total pulpectomy in primary molars are discussed.

  16. Transplantation of Cryopreserved Teeth: A Systematic Review

    OpenAIRE

    Osathanon, Thanaphum

    2010-01-01

    The aim of this article was to examine the research articles regarding biological and mechanical properties of cryopreserved teeth for potential use in tooth transplantation. A systematic review of literatures was performed by Pubmed searching with assigned key words from January 1, 1990 to June 8, 2009. All articles were examined for inclusion criteria. Secondary search was conducted by hand-search through references of included articles from primary search. A total of 24 articles were obtai...

  17. Sexual dimorphism in permanent teeth of modern Greeks.

    Science.gov (United States)

    Zorba, Eleni; Moraitis, Konstantinos; Manolis, Sotiris K

    2011-07-15

    Sex determination is considered an important step in reconstructing the biological profile of unknown individuals from a forensic context. Forensic anthropologists have long used teeth as an additional tool for sex determination as they resist postmortem destruction. In this case the use of population-specific data is necessary since sexual dimorphism varies between different populations. Currently there are no odontometric standards for determining sex in Greek populations. The purpose of this study is to examine the degree of sexual dimorphism in permanent teeth of modern Greeks. A total of 839 permanent teeth in 133 individuals (70 males and 63 females) from the Athens Collection were examined. Mesiodistal and buccolingual crown and cervical diameters of both maxillary and mandibular teeth were measured. It was found that males have bigger teeth than females and in 65 out of 88 dimensions measured, male teeth exceeded female teeth significantly (P<0.05). Canines were the most dimorphic teeth followed by first premolars, maxillary second premolar and mandibular second molar. Although other teeth were also sexually dimorphic they did not have a statistically significant difference in all dimensions. The most dimorphic dimension was buccolingual cervical diameter followed by buccolingual crown diameter. A comparison of sexual dimorphism in teeth between different populations showed that it differs among different groups. European population groups presented the highest degree of sexual dimorphism in teeth whereas Native South Americans the lowest.

  18. Microprobe analysis of teeth by synchrotron radiation: environmental contamination

    International Nuclear Information System (INIS)

    An X-ray fluorescence set-up with microprobe capabilities, installed at the Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE) synchrotron (France) was used for elemental determination in teeth. To evaluate the influence of living habits in dental elemental composition nine teeth collected post-mortem were analysed, five from a miner and four from a fisherman. All teeth from the fisherman were healthy. From the miner some teeth were carious and one of them was filled with metallic amalgam. Teeth were sliced under the vertical plane and each slice was scanned from the root to the enamel for elemental profile determination. The synchrotron microprobe resolution was of 100 μm and incident photons of 18 keV energy were used. The elemental concentration values found suggest heterogeneity of the teeth material. Moreover, the distinct profiles for Mn, Sr, Br and Pb were found when teeth from the miner and from the fisherman are compared which can be associated with dietary habits and environmental influence. Higher concentrations of Mn and Sr were found for the fisherman teeth. In addition, Br was only observed in this group of teeth. Pb levels are higher for the miner teeth in particular for dentine regions. The influence of amalgam, such as, increase of Zn and Hg contents in the teeth material, is only noticed for the immediate surroundings of the treated cavity

  19. Microprobe analysis of teeth by synchrotron radiation: environmental contamination

    Energy Technology Data Exchange (ETDEWEB)

    Pinheiro, T. E-mail: murmur@itn1.itn.pt; Carvalho, M.L.; Casaca, C.; Barreiros, M.A.; Cunha, A.S.; Chevallier, P

    1999-09-02

    An X-ray fluorescence set-up with microprobe capabilities, installed at the Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE) synchrotron (France) was used for elemental determination in teeth. To evaluate the influence of living habits in dental elemental composition nine teeth collected post-mortem were analysed, five from a miner and four from a fisherman. All teeth from the fisherman were healthy. From the miner some teeth were carious and one of them was filled with metallic amalgam. Teeth were sliced under the vertical plane and each slice was scanned from the root to the enamel for elemental profile determination. The synchrotron microprobe resolution was of 100 {mu}m and incident photons of 18 keV energy were used. The elemental concentration values found suggest heterogeneity of the teeth material. Moreover, the distinct profiles for Mn, Sr, Br and Pb were found when teeth from the miner and from the fisherman are compared which can be associated with dietary habits and environmental influence. Higher concentrations of Mn and Sr were found for the fisherman teeth. In addition, Br was only observed in this group of teeth. Pb levels are higher for the miner teeth in particular for dentine regions. The influence of amalgam, such as, increase of Zn and Hg contents in the teeth material, is only noticed for the immediate surroundings of the treated cavity.

  20. Anticoagulation after anterior myocardial infarction and the risk of stroke.

    Directory of Open Access Journals (Sweden)

    Jacob A Udell

    Full Text Available BACKGROUND: Survivors of anterior MI are at increased risk for stroke with predilection to form ventricular thrombus. Commonly patients are discharged on dual antiplatelet therapy. Given the frequency of early coronary reperfusion and risk of bleeding, it remains uncertain whether anticoagulation offers additional utility. We examined the effectiveness of anticoagulation therapy for the prevention of stroke after anterior MI. METHODS AND FINDINGS: We performed a population-based cohort analysis of 10,383 patients who survived hospitalization for an acute MI in Ontario, Canada from April 1, 1999 to March 31, 2001. The primary outcome was four-year ischemic stroke rates compared between anterior and non-anterior MI patients. Risk factors for stroke were assessed by multivariate Cox proportional-hazards analysis. Warfarin use was determined at discharge and followed for 90 days among a subset of patients aged 66 and older (n = 1483. Among the 10,383 patients studied, 2,942 patients survived hospitalization for an anterior MI and 20% were discharged on anticoagulation therapy. Within 4 years, 169 patients (5.7% were admitted with an ischemic stroke, half of which occurred within 1-year post-MI. There was no significant difference in stroke rate between anterior and non-anterior MI patients. The use of warfarin up to 90 days was not associated with stroke protection after anterior MI (hazard ratio [HR], 0.68; 95% confidence interval [CI], 0.37-1.26. The use of angiotensin-converting-enzyme inhibitors (HR, 0.65; 95% CI, 0.44-0.95 and beta-blockers (HR, 0.60; 95% CI, 0.41-0.87 were associated with a significant decrease in stroke risk. There was no significant difference in bleeding-related hospitalizations in patients who used warfarin for up to 90 days post-MI. CONCLUSION: Many practitioners still consider a large anterior-wall MI as high risk for potential LV thrombus formation and stroke. Among a cohort of elderly patients who survived an anterior

  1. Mini-implantes ortodônticos como auxiliares da fase de retração anterior Orthodontic mini-implants assisting the anterior retraction phase

    Directory of Open Access Journals (Sweden)

    Carlo Marassi

    2008-10-01

    Full Text Available INTRODUÇÃO: os mini-implantes ortodônticos se estabeleceram como um importante método de ancoragem e vêm auxiliando os ortodontistas nas várias etapas do tratamento ortodôntico, eliminando, em grande parte, a necessidade de colaboração dos pacientes e tornando os resultados mais previsíveis. OBJETIVO: este artigo descreve os principais aspectos do uso dos mini-implantes como auxiliares da fase de retração anterior, trazendo considerações sobre suas indicações, quantidade de movimentação dos dentes anteriores, os vetores de força de retração, o controle vertical, o posicionamento dos mini-implantes, os tipos de apoio na região anterior e a força a ser utilizada. São citados os sítios de instalação mais usados para a retração anterior e abordados fatores que deverão ser controlados durante o fechamento de espaço. Por fim, são citadas algumas considerações clínicas sobre o uso dos mini-implantes nessa importante fase do tratamento ortodôntico.INTRODUCTION: The use of orthodontic mini-implants has settled as an important anchorage method and is aiding the orthodontists in the several stages of the treatment, largely eliminating the need of patients' compliance, and turning the results more predictable. AIM: This article describes the main aspects of the use of mini-implants as auxiliaries on the retraction phase of the anterior teeth, bringing considerations about their indications, amount of movement of the anterior teeth, the vectors of retraction force, the vertical control and evaluation of the incisors vestibulolingual tipping, the positioning of the mini-implants, the support types in the anterior area and the force to be applied. The placement sites best used for the anterior retraction are mentioned, and the factors that should be controlled during the space closure are approached. Lastly, some clinical considerations on the use of mini-implants in such important phase of the orthodontic treatment are

  2. Are bovine teeth a suitable substitute for human teeth in in vitro studies to assess endotoxin load in root canals?

    Directory of Open Access Journals (Sweden)

    Tiago André Fontoura de MELO

    2015-01-01

    Full Text Available The present study aimed to determine the feasibility of using bovine teeth as a suitable alternative for human teeth, in experiments involving in vitro endotoxin contamination. Twenty bovine central incisors and 20 human single-root premolars had their dental crowns removed and root lengths set at 16 mm. Root canals were prepared up to #60 K-file size and sterilized with cobalt-60 gamma irradiation (20 kGy, 6 h. The teeth were randomly divided into four groups: G1-bovine teeth (bovine negative control, n = 10, G2-human teeth (human negative control, n = 10, G3-bovine teeth, inoculated withEscherichia coli (055:B55 LPS, and G4-human teeth inoculated with E. coli LPS. The G1 and G2 groups were exposed to apyrogenic water. After the teeth had been incubated at 37 °C and atmospheric humidity for 24 h, the samples of solutions in the main canals were collected with apyrogenic absorbent paper tips. LPS levels were quantified using Limulus Amebocyte Lysate assay. The data obtained were statistically analyzed using one-way ANOVA, with a significance level of 5%. A high amount of endotoxin was detected in the inoculated human teeth (G4 when compared to the sterilized teeth (G2, as well as in the inoculated bovine teeth (G3 when compared to the inoculated human teeth (G4. However, there was no statistical difference between bovine teeth before and after the E. coli endotoxin inoculation. Therefore, under the mentioned experimental conditions, the use of bovine teeth should not be a choice for laboratory research on endotoxin contamination.

  3. A minimally invasive approach to restore function and esthetics in periodontally involved teeth.

    Science.gov (United States)

    Ricci, Andrea; Ferraris, Federico

    2011-01-01

    The objective of dental treatment is the elimination of the etiologic factors, the rehabilitation of function and esthetics, and, when possible, the maintenance of vitality and structure of the natural dentition. After the loss of the periodontal support, as a consequence of periodontal disease, it may be necessary to splint the residual teeth in order to improve their stability, and sometimes it is also necessary to modify the morphology to optimize the final esthetic outcome. In many periodontally treated teeth, prosthodontic treatment on the residual dentition will be required with an important loss of tooth structure as an unavoidable consequence. This procedure frequently requires endodontic treatment of the residual abutments in order to obtain the necessary space for replacement materials. Similar objectives could however be achieved through an alternative therapy where the esthetic remodeling of the teeth and the closure of the interproximal spaces is obtained with composite resin materials. The objective of this article is to present an alternative protocol to optimize the functional and esthetic result of periodontally treated cases, where the most frequent complication is the increased length of the clinical crown. This is obtained by utilizing a different conservative approach, which has as its main objective the stabilization of the residual teeth, the maintenance of their vitality, and the achievement of the best esthetic result possible.

  4. Maxillary anterior tooth dimensions and proportions in an Irish young adult population.

    LENUS (Irish Health Repository)

    Condon, M

    2011-07-01

    This study was undertaken in a young Irish population to determine the dimensions and ratios of the six maxillary anterior teeth. One hundred and nine Irish subjects (age 18-25 inclusive) had irreversible hydrocolloid impressions made of their maxillary dentition poured in type V stone. Clinical crown dimensions were measured with a digital calliper. The stone casts were digitally photographed in a standardised manner enabling calculation of various ratios between the maxillary anterior teeth. Sexual dimorphism existed for various tooth dimensions; most notably canine teeth were in the region of 0·8 mm longer and 0·6 mm wider in males. Central and lateral incisors were found to be 0·5 mm wider in males. It is, therefore, recommended that dimensional tooth guidelines should be given for each of the sexes and not on a population basis. With regard to tooth proportion ratios, no significant differences were found between genders or the left and right sides for any of the measurements or ratios measured. The digitally recorded tooth proportions were similar for both sexes, and the Golden Proportion guidelines could only be applied to the lateral incisor\\/central incisor widths (0·618). Identified width proportions for the canine\\/central incisor were 0·58 and for canine\\/lateral incisor 0·89.

  5. Replacement of Anterior Composite Resin Restorations Using Conservative Ceramics for Occlusal and Periodontal Rehabilitation: An 18-Month Clinical Follow-Up.

    Science.gov (United States)

    da Cunha, Leonardo Fernandes; Prochnow, Rayane Alexandra; Costacurta, Adriana Osten; Gonzaga, Carla Castiglia; Correr, Gisele Maria

    2016-01-01

    This case report describes a patient with discolored and fractured composite resin restorations on the anterior teeth in whom substitution was indicated. After wax-up and mock-up, the composite was removed and replaced with minimally invasive ceramic laminates. An established and predictable protocol was performed using resin cement. Minimally invasive ceramic restorations are increasingly being used to replace composite restorations. This treatment improves the occlusal and periodontal aspects during the planning and restorative phases, such as anterior guides, and laterality can be restored easily with ceramic laminates. In addition, the surface smoothness and contour of ceramic restorations do not affect the health of the surrounding periodontal tissues. Here we present the outcome after 18 months of clinical follow-up in a patient in whom composite resin restorations in the anterior teeth were replaced with minimally invasive ceramic laminates. PMID:27555970

  6. Replacement of Anterior Composite Resin Restorations Using Conservative Ceramics for Occlusal and Periodontal Rehabilitation: An 18-Month Clinical Follow-Up

    Directory of Open Access Journals (Sweden)

    Leonardo Fernandes da Cunha

    2016-01-01

    Full Text Available This case report describes a patient with discolored and fractured composite resin restorations on the anterior teeth in whom substitution was indicated. After wax-up and mock-up, the composite was removed and replaced with minimally invasive ceramic laminates. An established and predictable protocol was performed using resin cement. Minimally invasive ceramic restorations are increasingly being used to replace composite restorations. This treatment improves the occlusal and periodontal aspects during the planning and restorative phases, such as anterior guides, and laterality can be restored easily with ceramic laminates. In addition, the surface smoothness and contour of ceramic restorations do not affect the health of the surrounding periodontal tissues. Here we present the outcome after 18 months of clinical follow-up in a patient in whom composite resin restorations in the anterior teeth were replaced with minimally invasive ceramic laminates.

  7. Replacement of Anterior Composite Resin Restorations Using Conservative Ceramics for Occlusal and Periodontal Rehabilitation: An 18-Month Clinical Follow-Up

    Science.gov (United States)

    Prochnow, Rayane Alexandra; Costacurta, Adriana Osten; Correr, Gisele Maria

    2016-01-01

    This case report describes a patient with discolored and fractured composite resin restorations on the anterior teeth in whom substitution was indicated. After wax-up and mock-up, the composite was removed and replaced with minimally invasive ceramic laminates. An established and predictable protocol was performed using resin cement. Minimally invasive ceramic restorations are increasingly being used to replace composite restorations. This treatment improves the occlusal and periodontal aspects during the planning and restorative phases, such as anterior guides, and laterality can be restored easily with ceramic laminates. In addition, the surface smoothness and contour of ceramic restorations do not affect the health of the surrounding periodontal tissues. Here we present the outcome after 18 months of clinical follow-up in a patient in whom composite resin restorations in the anterior teeth were replaced with minimally invasive ceramic laminates. PMID:27555970

  8. Numerical Simulation Of Cutting Of Gear Teeth

    Science.gov (United States)

    Oswald, Fred B.; Huston, Ronald L.; Mavriplis, Dimitrios

    1994-01-01

    Shapes of gear teeth produced by gear cutters of specified shape simulated computationally, according to approach based on principles of differential geometry. Results of computer simulation displayed as computer graphics and/or used in analyses of design, manufacturing, and performance of gears. Applicable to both standard and non-standard gear-tooth forms. Accelerates and facilitates analysis of alternative designs of gears and cutters. Simulation extended to study generation of surfaces other than gears. Applied to cams, bearings, and surfaces of arbitrary rolling elements as well as to gears. Possible to develop analogous procedures for simulating manufacture of skin surfaces like automobile fenders, airfoils, and ship hulls.

  9. Tutankhamun's Dentition: The Pharaoh and his Teeth.

    Science.gov (United States)

    Pausch, Niels Christian; Naether, Franziska; Krey, Karl Friedrich

    2015-01-01

    Tutankhamun was a Pharaoh of the 18th Dynasty (New Kingdom) in ancient Egypt. Medical and radiological investigations of his skull revealed details about the jaw and teeth status of the mummy. Regarding the jaw relation, a maxillary prognathism, a mandibular retrognathism and micrognathism have been discussed previously. A cephalometric analysis was performed using a lateral skull X-ray and a review of the literature regarding King Tutankhamun´s mummy. The results imply diagnosis of mandibular retrognathism. Furthermore, third molar retention and an incomplete, single cleft palate are present. PMID:26963220

  10. Anterior Maxillary Intrusion and Retraction with Corticotomy-Facilitated Orthodontic Treatment and Burstone Three Piece Intrusive Arch

    OpenAIRE

    Prabhakar, Ramachandra; M K Karthikeyan; Saravanan, R.; Kannan, K.S.; Arun Raj, M.R.

    2013-01-01

    An adult patient with proclination and spacing was performed orthodontic treatment combined with corticotomy and the burstone three piece intrusive arch who desired a shortened treatment period. The patient had Angle’s Class I malocclusion with flaring of the maxillary and mandibular incisors. Pre adjusted edgewise appliance (MBT prescription) was fixed to the maxillary and mandibular teeth. Then corticotomy was performed on the cortical bone of the buccal sides in the maxillary anterior regi...

  11. The selection and arrangement of artificial teeth for complete dentures%全口义齿人工牙的选择与排列

    Institute of Scientific and Technical Information of China (English)

    吴国锋

    2012-01-01

    The selection and arrangement of artificial teeth are the key steps for complete denture manufacture. Those important factors influence the shape, size and mold of artificial teeth in the denture. Occlusion is the major consideration of posterior teeth which includes anatomic , semi- anatomic and nonanatomic ( e. G. Lingualized occlusion ) types of the teeth. It is the arrangement of the teeth that governs the contour of the lips, at rest and in speech. The most natural appearance of anterior teeth can be obtained when "denture face" ( with too perfect symmetry and regularity of the artificial teeth arrangement ) is avoided. For the setting of posterior teeth stable denture occlusion requires preservation of posterior centric occlusal stop. The trial denture appointment is used to evaluate and change, if necessary, the mold, shape and esthetic effects of anterior teeth, centric relation, and other characteristics of the denture before final processing.%选牙与排牙是全口义齿制作的关键步骤之一.前牙选择的要素包括人工牙的形态、大小和颜色.后牙则主要考虑(牙合)型,一般包括三种类型:解剖式牙、半解剖式牙、非解剖式牙(例如舌向集中(牙合)型牙).排列前牙对于恢复患者唇部正常外形以及改善发音都有重要影响,应尽量避免左右牙齿过于对称而引起的"假牙面容".后牙排列则侧重恢复咬合功能.全口义齿完成选牙和排牙后应进行临床试戴,目的是检查前牙美观是否满意、基托边缘是否合适、咬合是否良好等.

  12. Triplication of Deciduous Teeth: A Rare Dental Anomaly

    OpenAIRE

    Suresh Yadav; Shallu Tyagi; Prince Kumar; Divya Sharma

    2013-01-01

    Fusion of teeth is the union of two or more tooth germs, which are usually separated. Depending upon the stage of odontogenesis, it can be complete or incomplete. The present case describes fusion between the maxillary primary right central and lateral incisor with a supernumerary tooth. Clinical and radiographic examination revealed the presence of fused triple teeth. The fused teeth were extracted, sectioned and were visualized under stereomicroscope at three levels and the diagnosis of fus...

  13. Abordagem de lesão de cárie proximal em dentes decíduos anteriores pela técnica de abrasão: relato de caso

    Directory of Open Access Journals (Sweden)

    Fernanda Malheiro Santos

    2010-01-01

    Full Text Available The treatment of proximal carious lesions in primary teeth is usually difficult to implement. The success is related to cavity preparation, the proper color choice of the restorative material and the restorative technique itself. This case report describes for proximal carious lesions in primary teeth alternative approach, by using abrasion technique of the decayed surface and with the technique of surface abrasion of decayed, with clinical and radiographic follow-up of 07 months. It is concluded that, the abrasion technique can be effective to arrest proximal carious lesions in primary anterior teeth.

  14. Foreign Body Embedded in Anterior Chamber Angle

    Directory of Open Access Journals (Sweden)

    Shmuel Graffi

    2012-01-01

    Full Text Available Introduction. We present a case of a metallic foreign body embedded in the anterior chamber angle. After standing in close proximity to a construction worker breaking a tile, a 26-year-old woman using soft contact lens for the correction of mild myopia presented to emergency department for evaluation of a foreign body sensation of her right eye. Methods and Results. Diagnosis was confirmed by gonioscopic examination and a noncontrast CT scan of head and orbits. The foreign body was removed by an external approach without utilizing a magnet. The patient's final outcome was favorable. Discussion. The above is a rare clinical situation, which is impossible to detect on slit-lamp examination without a gonioscopic view. Proper imaging and a specific management are mandatory in order to achieve favorable outcome.

  15. Evaluation of the therapeutic efficiency of mandibular anterior implant-supported fixed bridges with cantilevers

    Institute of Scientific and Technical Information of China (English)

    WU Min-jie; WANG Xiao-jing; ZOU Li-dong; XU Wei-hua; ZHANG Xiang-hao

    2013-01-01

    Background Dental implant technology has developed rapidly in recent years.However,the use of implant-supported fixed bridges with cantilevers has been controversial.The purpose of this study was to evaluate the clinical results of the mandibular anterior implant-supported fixed bridges with a cantilever.Method Thirty-three patients (15 males,18 females; mean age,42.6 years; range 20-54 years) with two missing anterior mandibular teeth had single implant-supported fixed bridges with a cantilever.Clinical examination was recorded and radiographs were taken.The mean duration of follow-up was 30 months (15-44 months).Results All implants survived.Loosening or fracture of the prosthesis was not observed.All patients were satisfied with the treatment.The mean bone resorption values after 12,24,and 36 months of implant loading were 0.94,1.18 and 1.35 mm respectively.The changes of gingival papilla height ranged from 0 to 0.5 mm.There was significant difference between 1-year and 2 or 3 years restoration groups regarding the average gingival height changes (P <0.05).Conclusion After careful and precise selection of patients,restoration with a single implant-supported fixed bridge with a cantilever can be recommended if two anterior mandibular teeth are missing.

  16. MANAGEMENT OF TEMPORO MANDIBULAR DISORDER (TMD IN PATIENT WITH LOW VERTICAL DIMENSION AND DEEP ANTERIOR BITE

    Directory of Open Access Journals (Sweden)

    Henni Koesmaningati

    2015-06-01

    Full Text Available The cases of TMD are complex and multifactorial, therefore the management should be done by several disciplines. In this report, a 27-year-old man came to the teaching hospital of the University of Indonesia Faculty of Dentistry’s Prosthodontic Department complaining about clicking sound and pain around his right joint. He received orthodontic treatment 9 years ago with removable appliance at a private practice and had 4 premolar extractions. The patient’s face looked asymmetric, with a low vertical dimension, a Class II occlusion, and an anterior deep bite. Besides that, he clenched his teeth during emotional stress. Lateral transcranial photo showed that the position of the left condyle was relatively normal or slightly anterior, and the right condyle was in the superoposterior position in the fossa with an abnormal shape. To solve this problem, the patient was referred to the Orthodontic Department to get a correct vertical dimension and normal anterior overbite. After 6 years, the patient was again referred to the Prosthodontic Department, but the result was not successful. In order to get the right vertical dimension, an occlusal splint was fabricated to achieve a comfort jaw relation. In this position, the overbite was 2 mm, but the space between the upper and lower posterior teeth was 5 mm. In this situation, full veneer crowns were not impossible to fabricate. Finally, to maintain this comfort position, the patient was suggested to wear the occlusal splint and come regularly for control every 6 months.

  17. Anterior cruciate ligament - updating article.

    Science.gov (United States)

    Luzo, Marcus Vinicius Malheiros; Franciozi, Carlos Eduardo da Silveira; Rezende, Fernando Cury; Gracitelli, Guilherme Conforto; Debieux, Pedro; Cohen, Moisés

    2016-01-01

    This updating article on the anterior cruciate ligament (ACL) has the aim of addressing some of the most interesting current topics in this field. Within this stratified approach, it contains the following sections: ACL remnant; anterolateral ligament and combined intra and extra-articular reconstruction; fixation devices; and ACL femoral tunnel creation techniques.

  18. Anterior cruciate ligament - updating article.

    Science.gov (United States)

    Luzo, Marcus Vinicius Malheiros; Franciozi, Carlos Eduardo da Silveira; Rezende, Fernando Cury; Gracitelli, Guilherme Conforto; Debieux, Pedro; Cohen, Moisés

    2016-01-01

    This updating article on the anterior cruciate ligament (ACL) has the aim of addressing some of the most interesting current topics in this field. Within this stratified approach, it contains the following sections: ACL remnant; anterolateral ligament and combined intra and extra-articular reconstruction; fixation devices; and ACL femoral tunnel creation techniques. PMID:27517015

  19. Factors influencing trace element composition in human teeth

    Energy Technology Data Exchange (ETDEWEB)

    Tandon, L. [Los Alamos National Lab., NM (United States); Iyengar, G.V. [Biomineral Sciences International, Inc., Bethesda, MD (United States)

    1997-12-01

    The authors recently compiled and reviewed the literature published in or after 1978 for 45 major, minor, and trace elements in human teeth as a part of an International Atomic Energy Agency (IAEA) study. The purpose of this paper is to discuss the various factors that influence the concentration levels of certain trace elements in human teeth. The sampling practices and analytical techniques that are applicable for trace element analysis are also discussed. It is also our intention to identify reference range of values, where data permit such conclusions. The scrutiny was designed to identify only the healthy permanent teeth, and values from teeth with fillings, caries, or periodontal diseases were eliminated.

  20. Triplication of deciduous teeth: A rare dental anomaly

    Directory of Open Access Journals (Sweden)

    Suresh Yadav

    2013-01-01

    Full Text Available Fusion of teeth is the union of two or more tooth germs, which are usually separated. Depending upon the stage of odontogenesis, it can be complete or incomplete. The present case describes fusion between the maxillary primary right central and lateral incisor with a supernumerary tooth. Clinical and radiographic examination revealed the presence of fused triple teeth. The fused teeth were extracted, sectioned and were visualized under stereomicroscope at three levels and the diagnosis of fusion of three teeth was confirmed histologically.

  1. Prevalence of supernumerary teeth in deciduous and mixed dentition.

    Science.gov (United States)

    Dash, J K; Sahoo, P K; Das, S; Mohanty, U K

    2003-03-01

    Supernumerary teeth are the extra teeth which may have either erupted or unerupted in addition to normal dentition and are seen both in deciduous as well as permanent dentition. The incidence of supernumerary teeth shows more frequent occurrence in permanent dentition than deciduous dentition, affecting both the sexes. The etiology of supernumerary teeth is still unknown and not well understood, but thought to be the result from disturbance during the initiation and proliferation stages of tooth development. In the present study an attempt has been made to asses, its prevalence in deciduous and mixed dentition phase. PMID:12885009

  2. Válvula de uretra anterior Anterior urethral valves

    Directory of Open Access Journals (Sweden)

    Silvio Tucci Jr.

    2003-02-01

    Full Text Available Objetivo: apresentar os aspectos clínicos, diagnósticos e terapêuticos de pacientes portadores de válvula da uretra anterior. Descrição: em dois neonatos, o diagnóstico presuntivo de patologia obstrutiva do trato urinário foi sugerido pela ultra-sonografia realizada no período pré-natal, confirmando-se o diagnóstico de válvula de uretra anterior pela avaliação pós-natal. Os pacientes foram submetidos a tratamento cirúrgico paliativo, com vesicostomia temporária e, posteriormente, definitivo, pela fulguração endoscópica das válvulas. Ambos evoluíram com função renal normal. Comentários: a válvula da uretra anterior é anomalia rara que deve ser considerada em meninos com quadro radiológico pré-natal sugestivo de obstrução infravesical, secundariamente à hipótese mais comum de válvula da uretra posterior. Ressaltamos a utilização da vesicostomia como derivação urinária temporária nestes casos, prevenindo potenciais complicações pela manipulação da uretra do recém-nascido.Objective: to discuss clinical signs, diagnostic tools and therapeutics of anterior urethral valves, an obstructive anomaly of the urinary system in males. Description: signs of urinary tract obstruction were identified on pre-natal ultrasound in two male fetuses and the diagnosis of anterior urethral valves was made through post-natal evaluation. As an initial treatment, vesicostomy was performed in both patients. Later, the valves were fulgurated using an endoscopic procedure. During the follow-up period both patients presented normal renal function. Comments: anterior urethral valves are a rare form of urethral anomaly that must be ruled out in boys with pre-natal ultrasound indicating infravesical obstruction. Vesicostomy used as an initial treatment rather than transurethral fulguration may prevent potential complications that can occur due to the small size of the neonatal urethra.

  3. An ambiguous asymptomatic swelling in the maxillary anterior region—A case report

    Science.gov (United States)

    Surej Kumar, L.K.; Manuel, Suvy; Nair, Bindu J.; Nair S, Vinod

    2016-01-01

    Introduction Glandular odontogenic cyst is a rare and recently recognized type of developmental odontogenic cyst. Being odontogenic in origin, because of the pluripotentiality of the odontogenic epithelium it can show glandular or salivary features. Presentation of a case A 46 year old female patient was referred to the Oral and Maxillofacial Surgery department with chief complaint of painless swelling in the right anterior region of maxilla, radiographically associated with teeth 12, 13. Mucosa over the swelling was slightly bluish in colour and no associated palatal swelling was seen. No incidence of trauma was reported and involved teeth were not mobile. Discussion Although we have many differential diagnoses, our working diagnosis was a periapical cyst, so conventional treatment of root canal treatment, cyst enucleation, and apicoectomy was planned. Conclusion Here we present a case which was initially misdiagnosed and mismanaged but on subsequent histopathologic examination revealed the final diagnosis. PMID:27093689

  4. Biological approach for management of anterior tooth trauma: Triple case report

    Directory of Open Access Journals (Sweden)

    Puneet Goenka

    2011-01-01

    Full Text Available Anterior crown fractures are a common form of injury that mainly affect children and adolescents. The position of maxillary incisors and their eruptive pattern carries a significant risk for trauma. In the pre-adhesive era, fractured teeth needed to be restored either with pin-retained inlays or cast restorations that sacrificed healthy tooth structure, and were a challenge for clinicians to match with adjacent teeth. The development of adhesive dentistry has allowed dentists to use the patient′s own fragment to restore the fractured tooth. Three cases are presented here with complicated crown fracture of maxillary central incisors; the reattachment of the fractured tooth segment in these cases has been performed using different combinations of techniques, viz. simple reattachment, circumferential bevel and internal dentinal groove.

  5. Biological approach for management of anterior tooth trauma: Triple case report

    Directory of Open Access Journals (Sweden)

    Goenka P

    2010-09-01

    Full Text Available Anterior crown fractures are a common form of injury that mainly affect children and adolescents. The position of maxillary incisors and their eruptive pattern carries a significant risk for trauma. In the pre-adhesive era, fractured teeth needed to be restored either with pin-retained inlays or cast restorations that sacrificed healthy tooth structure and were a challenge for clinicians to match with adjacent teeth. The development of adhesive dentistry has allowed dentists to use the patient′s own fragment to restore the fractured tooth. Three cases are presented here with complicated crown fracture of maxillary central incisors; the reattachment of the fractured tooth segment in this case has been performed using different combinations of techniques, viz. simple reattachment, circumferential bevel and internal dentinal groove.

  6. Maxillary overlay removable partial dentures for the restoration of worn teeth.

    Science.gov (United States)

    Fonseca, Júlio; Nicolau, Pedro; Daher, Tony

    2011-04-01

    Prolonged tooth maintenance by a more aged population considerably increases the probability of dentists having to treat patients with high levels of tooth wear. Pathological tooth wear, caused primarily by parafunction, seems to be a growing problem that affects a large number of adult patients. The clinical report presents a case of a partially edentulous patient with an elevated degree of wear in the upper jaw caused by attrition and erosion, rehabilitated with a maxillary overlay removable partial denture (ORPD) consisting of a chrome-cobalt (Cr-Co) framework with anterior acrylic resin veneers, posterior cast overlays, and acrylic resin denture bases. Removable partial prosthesis is a treatment alternative when teeth are found to be severely worn or when the patient needs a simple and economical option. Because economics is a conditional factor of the treatment, the clinician should present different treatment alternatives to the patient, in which the overlay prosthesis can be considered.

  7. Clinical Manifestations of pathology of temporomandibular joints and masticatory muscles in patients with teeth occlusion and teeth row disturbances

    Directory of Open Access Journals (Sweden)

    A.V. Lepilin

    2010-06-01

    Full Text Available The aim of the research is a literature review about the problem of temporomandibular joints and masticatory muscles in patients with teeth occlusion and teeth row disturbances. Teeth occlusion and teeth row disturbances are widespread pathology of maxillofacial area, that can lead to different pathology alterations of masticatory system including musculo-articular dysfunction. Some specialists consider that the key factor of pathogenesis of musculo-articular dysfunction is occlusion disturbances, by the other opinion - discoordination of muscle contraction. Thus occlusive and muscular disorders are leading in pathogenesis and clinic of musculo-articular dysfunction

  8. Comparative evaluation of shear bond strength of two self-etching adhesives (sixth and seventh generation on dentin of primary and permanent teeth: An in vitro study

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    Yaseen S

    2009-03-01

    Full Text Available Aim: The present study was undertaken to compare and evaluate shear bond strength of two self-etching adhesives (sixth and seventh generation on dentin of primary and permanent teeth. Materials and Methods: Flat dentin surface of 64 human anterior teeth (32 primary and 32 permanent divided into four groups of 16 each. Groups A and C were treated with Contax (sixth generation, while groups B and D were treated with Clearfil S3 (seventh generation. A teflon mold was used to build the composite (Filtek Z-350 cylinders on the dentinal surface of all the specimens. Shear bond strength was tested for all the specimens with an Instron Universal Testing Machine. Data were statistically analyzed using one-way ANOVA for multiple group comparison, followed by student′s unpaired ′t′ test for group-wise comparison. Results: There was no statistically significant difference in shear bond strength among the study groups except that primary teeth bonded with Contax exhibited significantly lesser shear bond strength than permanent teeth bonded with Clearfil S3. Conclusion: This study revealed that Clearfil S3 could be of greater advantage in pediatric dentistry than Contax because of its fewer steps and better shear bond strength in dentin of both primary and permanent teeth.

  9. Teething myths among nursing mothers in a Nigerian community

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    Opeodu Olanrewaju Ige

    2013-01-01

    Full Text Available Background: Many symptoms had been associated with teething in children with the possibility of overlooking potentially fatal condition. Symptoms that had been associated with teething include diarrhoea, fever, vomiting and cough. The possibility that any of these symptoms could have been due to other causes call for thorough investigation of the child before concluding that it is only "teething". Objectives: The study was carried out to assess the beliefs of nursing mothers concerning symptoms that are associated with teething among children and to identify those that would seek medical treatments in case of their children having such symptoms during teething. Materials and Methods: Two hundred and ninety nursing mothers whose children had erupted at least a tooth were interviewed in the immunisation clinics of the University College Hospital and Adeoyo Maternity Teaching Hospital, both in Ibadan, Nigeria, on their beliefs and practice concerning teething in children. Results: One hundred and eighty-eight (64.8% of the mothers associated symptoms such as fever, cough, catarrh and diarrhoea with eruption of teeth in their children. Over half of the women agreed that a child having either fever (51.0%, ear infection (57.6% or cough (50.3% should be promptly taken for medical consultation and not be tagged "teething", while for other symptoms such as gum pain (74.5%, sleepless night (56.6%, vomiting (51.4% and diarrhoea (51.7%, over half of the mothers believed that the symptoms will resolve following the eruption of the teeth. Conclusion: The study demonstrated that mothers in the study attributes several symptoms to teething, which could be detrimental to the survival of their children as the symptom could have been due to other causes. There is, therefore, need for public enlightenment to create awareness on the possible effect of presumptuous belief that childhood diseases are due to teething process.

  10. Does the maxillary anterior ratio in Korean adults follow the Golden Proportion?

    Science.gov (United States)

    2016-01-01

    PURPOSE The purpose of this study was to determine the effect of changes in the horizontal plane angle on the mesiodistal width ratios of the maxillary anterior teeth during the acquisition of frontal view photographs, derive these ratios for Korean adults on the basis of the data obtained, and analyze them using the Golden Proportion as a reference. MATERIALS AND METHODS In experiment I, 30 plaster casts were mounted on an articulator and positioned on the angle-measuring device with a center setting of 0°. The device was rotated to 10° in 1° increments in a counterclockwise direction. At each angle, photographs were obtained and analyzed. Experiment II was based on 60 patients who visited the Department of Prosthodontics at Kyungpook National University Dental Hospital from February 2012 to February 2015. The patients were divided into three groups [Male (M), Female (F), Total (M + F)]. Frontal views were obtained for all groups and analyzed. RESULTS From 1° to 10°, the relative mesiodistal width ratios for the maxillary anterior teeth showed no significant differences from those at 0°. In all three groups, the relative width ratio of the maxillary central incisor was smaller than that specified in the Golden Proportion; the opposite was true for the canine. CONCLUSION Our results suggest that the mesiodistal width ratios of the maxillary anterior teeth do not follow the Golden Proportion in Korean adults, and that a change in the horizontal plane angle from 1° to 10° during frontal photography does not affect these ratios. PMID:27141256

  11. Maternal diets, nutritional status, and zinc in contemporary Mexican infants' teeth: Implications for reconstructing paleodiets.

    Science.gov (United States)

    Dolphin, Alexis E; Goodman, Alan H

    2009-11-01

    Despite attempts to use zinc (Zn) concentrations in hard tissues to comment upon the degree of carnivory in past populations, zinc has yielded inconsistent trophic level effects. The question of what, if anything, zinc in human enamel reveals regarding past diets is the focus of this research. We test whether the zinc content of deciduous tooth enamel from contemporary Mexican infants varies by maternal dietary variables such as zinc intake, proportion of animal products consumed, and dietary components that are known to impact zinc absorption. Deciduous teeth were collected from former participants in a longitudinal study of maternal and infant diet and function in highland Mexico. The Zn/Ca ratios of both prenatal and postnatal regions of 37 anterior teeth representing 26 individuals were assessed via laser ablation-inductively coupled plasma-mass spectrometry. Maternal dietary data collected during lactation were not correlated with zinc levels in the early postnatal enamel of infants' teeth, which were forming at the same time. In the case of prenatal enamel, zinc values were correlated with the consumption of foods known to influence Zn bioavailability, most notably tortillas (P = 0.008; r = 0.510), but not with meat consumption. Unexpectedly, women who consumed diets with poor zinc bioavailability during pregnancy gave birth to infants whose prenatal enamel demonstrated the highest Zn/Ca ratios, possibly due to enhanced zinc absorption during pregnancy for those mothers suffering most from long-term micronutrient deficiency. These results would suggest that zinc is not a reliable trophic level indicator. PMID:19373846

  12. Prevalence and Pattern of Accessory Teeth (Hyperdontia in Permanent Dentition of Iranian Orthodontic Patients.

    Directory of Open Access Journals (Sweden)

    Fariborz Amini

    2013-11-01

    Full Text Available Awareness of hyperdontia pattern/prevalence can be useful in early diagnosis and prevention by general practitioners, pediatric dentists, and orthodontists. Since the previous results regarding the pattern of hyperdontia (supernumerary teeth are controversial, this study aimed to assess this subject among Iranian orthodontic patients.All approved panoramic radiographs of 3374 orthodontic patients (aged 10 to 20 years old who had visited orthodontic departments of all Tehran dentistry universities and 10 private clinics during the years 1999-2009 were investigated to establish the prevalence/pattern of hyperdontia in permanent dentition (excluding third molars. The data were analyzed using a chi-square, a chi-square goodness-of-fit, and a Fisher exact test (α=0.05.Of the patients, 2012 were female and 1362 were male. The prevalence of hyperdontia was 0.72% (14 females [0.69% of females], 10 males [0.73% of males], female-to-male ratio=1:1.055. The difference between the genders was not significant (P = 0.896. No double or multiple supernumeraries were found. The most common accessory teeth were mesiodens (58.3%, maxillary laterals (25%, and maxillary premolars (16.7%. Hyperdontia was significantly more common (P=0.000 in maxilla (there was only one mandibular accessory tooth. It was more frequent in the anterior segment (P=0.000. However the occurrence was not significantly different between bimaxillary right and left quadrants (P=0.6.Hyperdontia was more common in premaxilla, and the most common accessory tooth was mesiodens. Unlike earlier studies, no bilateral accessory teeth were found. Also no gender dimorphism was discerned.

  13. Congenital grooves and cervical enamel projections on the teeth and their relation to periodontal status

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    G.V. Prashanth

    2014-04-01

    Full Text Available Background: Periodontitis is primarily a dental plaque induced inflammatory disease, local factors that facilitate the accumulation of bacteria may contribute to the progression of the disease. Periodontal disease is not a single entity nor is there a single causative factor that elicits a consistent periodontal response. Dental abnormalities such as palatal grooves and cervical enamel projections (CEPs can act as a predisposing factor to the initiation of localized periodontal destruction. Objectives: 1. To evaluate the presence of developmental grooves and CEP in the anterior and posterior teeth. 2. To study their relationship to periodontal health. Methodology: The study included 1700 subjects of both genders. The presence of palatal grooves and CEPs were detected by visual perception and the suspected area was probed to measure the depth of the groove or enamel extension. The periodontal condition of the area was also examined and the statistical analysis was performed. Results: The prevalence rate of palatal grooves on the central incisor and lateral incisor was 1.8% and 9% respectively while 1.1% had enamel extensions on the molar teeth, all of which were associated with gingivitis or periodontitis. Conclusion: Grooves and projections in the cervical area caused increased plaque accumulation and might be considered a secondary etiological factor in periodontal breakdown and hence should be taken into consideration during periodontal examination and therapy.

  14. Neanderthal teeth from Moula-Guercy, Ardèche, France.

    Science.gov (United States)

    Hlusko, Leslea J; Carlson, Joshua P; Guatelli-Steinberg, Debbie; Krueger, Kristin L; Mersey, Ben; Ungar, Peter S; Defleur, Alban

    2013-07-01

    Here we describe dental remains from a Neanderthal fossil assemblage from Moula-Guercy, France. Our report demonstrates that the Moula-Guercy hominid remains contribute important morphological, developmental, and behavioral data to understanding Neanderthal evolutionary history. We include gross comparative morphological descriptions and enamel surface microstructure and microwear data. These teeth reveal numerous characteristics that are diagnostic of Neanderthals and provide no evidence for the presence of any other hominid taxa. Enamel growth increment data from the Moula-Guercy specimens yield evidence of a Neanderthal pattern of development, although at the lower end of the range of variation. The presence of a significant number of linear enamel hypoplasias indicates that these individuals were stressed during childhood. Molar microwear data suggest that these Neanderthals did not differ significantly from modern humans in terms of the fracture properties of the food they were consuming. The incisor microwear and macro striations provide evidence that these individuals may have been using their anterior teeth as tools, similar to the practices of several modern human populations such as the Inuit, Ipiutak, and Australian Aboriginals, and reminiscent of evidence from other Neanderthals from Krapina, Croatia, as well as the 600,000 year old hominids from Sima de los Huesos, Spain. Am J Phys Anthropol 151:477-491, 2013.© 2013 Wiley Periodicals, Inc. PMID:23737145

  15. 38 CFR 3.379 - Anterior poliomyelitis.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Anterior poliomyelitis. 3... Specific Diseases § 3.379 Anterior poliomyelitis. If the first manifestations of acute anterior poliomyelitis present themselves in a veteran within 35 days of termination of active military service, it...

  16. Resistance to cyclic loading of teeth restored with posts

    DEFF Research Database (Denmark)

    Sahafi, A; Peutzfeldt, A; Ravnholt, G;

    2005-01-01

    This in vitro study evaluated the effect of presence of post, presence of core, and of shape, type, and surface treatment of posts on resistance to cyclic loading of crowned human teeth. For all teeth, crowns designed without ferrule were cast in sterling silver and luted with resin cement (Panavia...

  17. Surgically facilitated experimental movement of teeth : systematic review

    NARCIS (Netherlands)

    Liem, A. M. L.; Hoogeveen, E. J.; Jansma, J.; Ren, Y.

    2015-01-01

    Several surgical techniques based on corticotomy and dental distraction have been developed to improve the movement of teeth and reduce the duration of orthodontic treatment. In this systematic review we have critically assessed published studies on the experimental movement of teeth to find out whe

  18. Facial lesions in piglets with intact or grinded teeth

    Directory of Open Access Journals (Sweden)

    Hansson Monica

    2012-04-01

    Full Text Available Abstract Background Piglets are born with eight sharp teeth that during nursing can cause facial lesions on littermates and teat lesions on the sow. Teeth grinding in piglets is therefore often practiced to reduce these lesions. The aim of this study was to assess the consequences of grinding piglet teeth in regard to the occurrence of lesions. In this study the piglets' teeth were grinded in 28 litters, and in 36 litters the piglets' teeth were kept intact. Twice, one time during the first week and one time during the second week after birth facial lesions of the piglets were scored and the teats of the sows were examined for lesions. The facial lesion score accounted for the amount and severity of lesions. The individual observations on piglets in the litter were synthesized in a litter facial lesion score. Findings 69.8% and 43.5% of the piglets had facial lesions in week 1 and week 2 respectively. The effect of treatment was not significant on litter facial lesion score. The litter facial lesion score was higher in week 1 than in week 2 (p p = 0.003 than in small litters. Mortality between week 1 and week 2 was higher in litters with intact teeth (p = 0.02. Sow teat lesions only occurred if litters had intact teeth. Conclusions According to our results teeth grinding is only justifiable in large litters.

  19. Rare occurrence of bilaterally impacted mandibular supernumerary teeth

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    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.

  20. Size variation in samples of fossil and recent murid teeth

    NARCIS (Netherlands)

    Freudenthal, M.; Martín Suárez, E.

    1990-01-01

    The variability coefficient proposed by Freudenthal & Cuenca Bescós (1984) for samples of fossil cricetid teeth, is calculated for about 200 samples of fossil and recent murid teeth. The results are discussed, and compared with those obtained for the Cricetidae.

  1. Real-Time Rendering of Teeth with No Preprocessing

    DEFF Research Database (Denmark)

    Larsen, Christian Thode; Frisvad, Jeppe Revall; Jensen, Peter Dahl Ejby;

    2012-01-01

    We present a technique for real-time rendering of teeth with no need for computational or artistic preprocessing. Teeth constitute a translucent material consisting of several layers; a highly scattering material (dentine) beneath a semitransparent layer (enamel) with a transparent coating (saliv...

  2. The Vikings bare their filed teeth.

    Science.gov (United States)

    Arcini, Caroline

    2005-12-01

    Finds of deliberate dental modification have for the first time been found in archaeological human skeletal material from Europe. The type of modification is a horizontally filed furrow on the frontal upper part of the tooth crown. The furrows are single or, more usually, multiple, and are found on the front teeth in the maxilla. The affected individuals are 24 men from the Viking Age (ca. 800-1050 AD), found in present day Sweden and Denmark. The marks are so well-made that it is most likely they were filed by a person of great skill. The reason for, and importance of, the furrows are obscure. The affected individuals may have belonged to a certain occupational group (such as tradesmen), or the furrows could have been pure decoration.

  3. Sorption of zinc on human teeth

    International Nuclear Information System (INIS)

    Zinc containing dental amalgams are sometimes used as fillings by dentists. The freshly mixed mass of the amalgam alloy and liquid mercury packed or condensed into a prepared tooth cavity. Zinc has been included in amalgams alloys up to 2% as an aid in manufacturing by helping to produce clean sound castings of the ingots. Although such restorations have a relatively long service life, they are subject to corrosion and galvanic action, thus releasing metallic products into the oral environment. The aim of this paper is to investigate the uptake (sorption) of Zinc ionic species on human teeth using the radioactive tracer technique. For this purpose the isotope Zn-65 produced from pile-irradiation of zinc metal was used. The various liquids studied were drinking water (tap water), tea, coffee, red tea and chicken soup. Sorption was studied through immersion of a single human tooth (extracted) in each of these liquids

  4. A newer approach in positioning teeth for dental prosthetics using lateral cephalometric, trans-cranial radiographs, and the Denar-Witzig articulator: a case of hypodontia in an adolescent patient.

    Science.gov (United States)

    Chapra, A; White, G E

    2001-01-01

    Traditionally in full denture prosthetics, anterior teeth are set on the models, independent of the effects on the face. More enlightened dentists, will then adjust the wax-up for speech, and some effects on the lips. Consideration is infrequently given to restoring the face by repositioning the teeth and mandible. Rarely is thought given to the effects of occlusion on the posture of the body. This report uses several techniques to restore facial esthetics and body posture. The techniques used include a cephalometric radiograph, transcranial radiographs, an articulator that has an adjustable "TMJ" (Denar-Witzig), and Symmetrigraf Posture Chart. This clinical report describes a newer approach in the positioning of maxillary anterior teeth for a patient with hypodontia and nail dysplasia syndrome, and the overall effect of this approach on the face and posture of the patient. Conventionally the precise form of the maxillary wax rim is fabricated with considerable variation from technician to another, based on the technicians training. This variation is evident on the position of the labial aspect of the rim horizontally and vertically. The wax rim is then further adjusted chair side based on subjective evaluation of the face. The maxillary anterior teeth position is established without considering that the lip position is not yet accustomed to the wax rim.

  5. A complex odontoma of the anterior maxilla associated with an erupting canine.

    Science.gov (United States)

    Pillai, Ajay; Moghe, Swapnil; Gupta, Mithilesh K; Pathak, Abhishek

    2013-11-12

    Many developmental anomalies of the jaw are accidentally diagnosed during radiographic investigations for other symptoms. Complex odontomas are odontogenic tumours, relatively rare in the anterior maxilla and generally asymptomatic. Frequently the odontoma may interfere with the eruption of teeth. This paper describes a case of complex odontoma in an 8-year-old girl, which resulted in the palatal displacement of the lateral incisor and an erupting permanent canine. A calcified mass was seen on the radiograph and was provisionally diagnosed as an odontoma which was surgically enucleated. Routine follow-up was carried out for more than 1 year and no recurrence was seen.

  6. Epidermoid cyst in Anterior, Middle

    Directory of Open Access Journals (Sweden)

    Kankane Vivek Kumar

    2016-09-01

    Full Text Available Epidermoid cysts are benign slow growing more often extra-axial tumors that insinuate between brain structures, we present the clinical, imaging, and pathological findings in 35 years old female patients with atypical epidermoid cysts which was situated anterior, middle & posterior cranial fossa. NCCT head revealed hypodense lesion over right temporal and perisylvian region with extension in prepontine cistern with mass effect & midline shift and MRI findings revealed a non-enhancing heterogeneous signal intensity cystic lesion in right frontal & temporal region extending into prepontine cistern with restricted diffusion. Patient was detoriated in night of same day of admission, emergency Fronto-temporal craniotomy with anterior peterousectomy and subtotal resection was done. The histological examination confirms the epidermoid cyst. The timing of ectodermal tissue sequestration during fetal development may account for the occurrence of atypical epidermoid cysts.

  7. Forensic study of sex determination using PCR on teeth samples.

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    Murakami H

    2000-02-01

    Full Text Available In this study, sex determination using polymerase chain reaction (PCR on tooth material was evaluated from the viewpoint of forensic medicine. The sensitivity of PCR for detection of the Y chromosome-specific alphoid repeat sequence and the X chromosome-specific alphoid repeat sequence was 0.5 pg of genomic DNA. Sex could be determined by PCR of DNA extracted from the pulp of 16 freshly extracted permanent teeth and dentine including the surface of the pulp cavity of 6 freshly extracted milk teeth. Sex could be determined using the pulp in all 20 teeth (10 male and 10 female preserved at room temperature for 22 years. For the pulp of teeth stored in sea water, the sex could be determined in all 8 teeth immersed for 1 week and in 5 of 6 teeth immersed for 4 weeks. In the remaining 1 tooth, in which sex determination based on the pulp failed, the sex could be determined correctly when DNA extracted from the tooth hard tissue was examined. For teeth stored in soil, the sex could be determined accurately in all 8 teeth buried for 1 week, 7 of 8 teeth buried for 4 weeks, and in all 6 teeth buried for 8 weeks. When teeth were heated for 30 min, sex determination from the pulp was possible in all teeth heated to 100, 150, and 200 degrees C, and even in some teeth heated to 250 degrees C. When this method was applied to actual forensic cases, the sex of a mummified body estimated to have been discovered half a year to 1 year after death could be determined readily by examination of the dental pulp. In the skeletons of 2 bodies placed under water for approximately 1 year and approximately 11 years and 7 months, pulp tissues had been dissolved and lost, but sex determination was possible using DNA extracted from hard dental tissues. These results indicate that this method is useful in forensic practices for sex determination based on teeth samples.

  8. Anterior impingement syndrome in dancers

    OpenAIRE

    O’Kane, John William; Kadel, Nancy

    2007-01-01

    Anterior impingement is a common problem in dancers occurring primarily secondary to the repetitive forced ankle dorsiflexion inherent in ballet. Symptoms generally occur progressively and may respond to conservative treatment including addressing biomechanical faults that contribute to the problem. As impingement progresses, movements essential to ballet may become impossible and arthroscopic ankle surgery is often effective for both diagnosis and treatment, allowing athletes to return to da...

  9. Immunohistochemical studies of the periodontal membrane in primary teeth

    DEFF Research Database (Denmark)

    Bille, Marie-Louise Bastholm; Nolting, Dorrit; Kjær, Inger

    2009-01-01

    Objectives. To describe the periodontal membrane of human primary teeth immunohistochemically, while focusing on the epithelial layer of Malassez, fibers, and peripheral nerves, and to compare the findings with those of a previous study of human permanent teeth. Material and methods. Nineteen human...... primary teeth extracted in late childhood in connection with treatment were fixed, decalcified, dehydrated, and embedded in paraffin. Paraffin sections were stained with wide spectrum screening (WSS), Vimentin, and NeuN in order to mark the epithelial layer of Malassez, fibers, and peripheral nerves...... could be identical to those in regions with no resorption. Conclusion. In regions without resorption, spatial organization of the periodontal membrane of primary teeth was similar to that of permanent teeth, although the number and distribution of epithelial cells and fibers differed. In regions with...

  10. Natal and neonatal teeth: A report of three cases

    Directory of Open Access Journals (Sweden)

    Ana Regina Romano

    2015-01-01

    Full Text Available The occurrence of natal and neonatal teeth is relativity rare. General dental practitioners should be aware of these conditions and be prepared to provide appropriate care for patients. The aim of this study is to describe two cases of neonatal teeth and one case of natal teeth, highlighting the importance of the treatment decision. In all of these cases the teeth were part of the normal series of primary dentition. In case 1 the tooth was extracted because of a possibility of aspiration. In cases 2 and 3 the teeth were monitored and parents were instructed about the necessary care, especially the need for good oral hygiene. In conclusion, each patient must be evaluated individually with radiographic and clinical examinations and the best treatment option should always be chosen taking into account parents’ views.

  11. [Clinical anatomy of the horse: teeth and dentition].

    Science.gov (United States)

    Staszyk, C

    2015-01-01

    The routine inspection of the equine oral cavity allows a numerical assessment of the teeth and provides information about positional changes within the dentition. By use of appropriate dental equipment, the occlusal surfaces of all teeth can be inspected and diagnosed. However, neither the teeth nor their occlusal surfaces are constant structures. Instead, equine teeth and, in particular, their occlusal surfaces are subjected to continuous morphological and positional changes due to the effects of aging and the equine-specific high amount of occlusal wear. Therefore, it is mandatory to define anatomical criteria, which allow us to distinguish between anatomical variations and pathological conditions. Moreover, an unambiguous nomenclature with regard to the equine-specific dental anatomy is essential. This article provides a tutorial overview of the equine dental anatomy as well as recent findings in the field of equine dentistry. Special attention is paid to dynamic changes within both individual teeth and dentition.

  12. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    Science.gov (United States)

    Hegde, Rahul J.; Bapna, Kavita

    2016-01-01

    Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether)-N, N, N', N'-tetraacetic acid (EGTA) and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distributed into three groups having ten teeth each. Following instrumentation, root canals of the first group were treated with 17% EGTA and the second group with 6% citric acid. Only saline was used as an irrigant for the control group. Then, the teeth were subjected to scanning electron microscopy (SEM) study. The scale given by Rome et al. for the smear layer removal was used in the present study. Results: The pictures from the SEM showed that among the tested irrigants, 17% EGTA + 5% sodium hypochlorite (NaOCl) group showed the best results when compared to other groups. Conclusion: The results advocate that the sequential irrigation of the pulp canal walls with 17% EGTA followed by 5% NaOCl produced efficacious and smear-free root canal walls. PMID:27307670

  13. Comparison of removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether-N, N, N', N'-tetraacetic acid and citric acid in primary teeth: A scanning electron microscopic study

    Directory of Open Access Journals (Sweden)

    Rahul J Hegde

    2016-01-01

    Full Text Available Background: Root canal irrigants are considered momentous in their tissue dissolving property, eliminating microorganisms, and removing smear layer. The present study was aimed to compare the removal of endodontic smear layer using ethylene glycol bis (beta-amino ethyl ether-N, N, N', N'-tetraacetic acid (EGTA and citric acid solutions with saline as a control in primary anterior teeth. Materials and Methods: Thirty primary anterior teeth were chosen for the study. The teeth were distributed into three groups having ten teeth each. Following instrumentation, root canals of the first group were treated with 17% EGTA and the second group with 6% citric acid. Only saline was used as an irrigant for the control group. Then, the teeth were subjected to scanning electron microscopy (SEM study. The scale given by Rome et al. for the smear layer removal was used in the present study. Results: The pictures from the SEM showed that among the tested irrigants, 17% EGTA + 5% sodium hypochlorite (NaOCl group showed the best results when compared to other groups. Conclusion: The results advocate that the sequential irrigation of the pulp canal walls with 17% EGTA followed by 5% NaOCl produced efficacious and smear-free root canal walls.

  14. Age-Dependent Changes in Pb Concentration in Human Teeth.

    Science.gov (United States)

    Fischer, Agnieszka; Wiechuła, Danuta

    2016-09-01

    The result of exposure to Pb is its accumulation in mineralized tissues. In human body, they constitute a reservoir of approx. 90 % of the Pb reserve. The conducted research aimed at determining the accumulation of Pb in calcified tissues of permanent teeth. The concentration of Pb in 390 samples of teeth taken from a selected group of Polish people was determined using the AAS method. Average concentration of Pb in teeth amounted to 14.3 ± 8.18 μg/g, range of changes: 2.21-54.8 μgPb/g. Accumulation of Pb in human body was determined based on changes in Pb concentration in teeth of subjects aged 13-84 years. It was found that in calcified tissues of teeth, the increase in concentration of Pb that occurs with age is a statistically significant process (p = 0.02, the ANOVA Kruskal-Wallis test). It was determined that the annual increase in concentration of Pb in tissues of teeth is approx. 0.1 μg/g. Moreover, a different course of changes in Pb concentration in tissues of teeth in people born in different years was observed. The level of Pb concentration in teeth of the oldest subjects (>60 years) decreased for those born in the 1930s compared to those in the 1950s. Teeth from younger persons (<60 years) were characterized by an increasing level of Pb concentration. The analysis of changes of Pb indicates that for low exposure, a relatively greater accumulation of Pb concentration in calcified tissues of teeth can occur. PMID:26888348

  15. Can they really be opposite? A new look at four critical aspects of anterior dental morphology.

    Science.gov (United States)

    Greenberg, Joseph R

    2008-09-01

    Human dental anatomy has not changed significantly in hundreds of years. Dental students and students of dental laboratory technology learn human dental anatomy as fundamental to their didactic work. Yet, so often we see dental restorations that do not follow the accepted basic design criteria of natural teeth. A possible conclusion is that the information was correctly presented as a basic science, but not completely carried over into clinical practice. When visually essential aspects of dental anatomy and composition are not accurately incorporated into esthetic restorations, patients are not completely served, and practitioners may be frustrated as well. This article reviews four essential aspects of anterior dental morphology--anterior tooth width/length proportions, bilateral symmetry, incisal edges, and incisal embrasures--that often are not accurately incorporated into dental restorations, and positions them in an easy to remember format: opposites.

  16. Pharyngeal teeth of the freshwater drum (Aplodinotus grunniens) a predator of the zebra mussel (Dreissena polymorpha)

    Science.gov (United States)

    French, John R. P., III

    1997-01-01

    The morphology of pharyngeal teeth of freshwater drum (Aplodinotus grunniens) was studied to determine changes that occur during growth of drum that may relate to consumption of zebra mussel (Dreissena polymorpha) by larger fish. Pharyngeal teeth were of three types. Cardiform teeth were replaced by villiform teeth, which were replaced by molariform teeth as the size class of drum increased. Molariform teeth comprised over 85% of total surface area of dentition in fish 265 mm long.

  17. Estimation of age from development and eruption of teeth

    Directory of Open Access Journals (Sweden)

    B. S. Manjunatha

    2014-01-01

    Full Text Available The developing dentition is used to assess maturity and estimate the age in many disciplines including anthropology, archeology, forensic science, pediatric dentistry and orthodontics. There is evidence that dental development is less effected than skeletal development by malnutrition and hormonal disorders. There are two methods of dental age assessment, radiographically and by clinically visualization of eruption of teeth. The clinical method to assess dental age is based on the emergence of teeth in the mouth. This method is more suitable since it does not require any special equipment, expertise and is more economical. Tooth formation is the best choice for estimating the age as variations are less as compared to other development factors. Eruption of teeth is one of the changes observed easily among the various dynamic changes that occur from the formation of teeth to the final shedding of teeth. The times of eruption of teeth are fairly constant and this can be made use of in ascertaining the average age of eruption of the tooth. Assessment of age of an individual by examination of teeth is one of the accepted methods of age determination.

  18. Structure, composition, and mechanical properties of shark teeth.

    Science.gov (United States)

    Enax, Joachim; Prymak, Oleg; Raabe, Dierk; Epple, Matthias

    2012-06-01

    The teeth of two different shark species (Isurus oxyrinchus and Galeocerdo cuvier) and a geological fluoroapatite single crystal were structurally and chemically characterized. In contrast to dentin, enameloid showed sharp diffraction peaks which indicated a high crystallinity of the enameloid. The lattice parameters of enameloid were close to those of the geological fluoroapatite single crystal. The inorganic part of shark teeth consisted of fluoroapatite with a fluoride content in the enameloid of 3.1 wt.%, i.e., close to the fluoride content of the geological fluoroapatite single crystal (3.64 wt.%). Scanning electron micrographs showed that the crystals in enameloid were highly ordered with a special topological orientation (perpendicular towards the outside surface and parallel towards the center). By thermogravimetry, water, organic matrix, and biomineral in dentin and enameloid of both shark species were determined. Dentin had a higher content of water, organic matrix, and carbonate than enameloid but contained less fluoride. Nanoindentation and Vicker's microhardness tests showed that the enameloid of the shark teeth was approximately six times harder than the dentin. The hardness of shark teeth and human teeth was comparable, both for dentin and enamel/enameloid. In contrast, the geological fluoroapatite single crystal was much harder than both kinds of teeth due to the absence of an organic matrix. In summary, the different biological functions of the shark teeth ("tearing" for Isurus and "cutting" for Galeocerdo) are controlled by the different geometry and not by the chemical or crystallographic composition.

  19. A Curriculum Vitae of Teeth: Evolution, Generation, Regeneration

    Directory of Open Access Journals (Sweden)

    Despina S. Koussoulakou, Lukas H. Margaritis, Stauros L. Koussoulakos

    2009-01-01

    Full Text Available The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes. Over the course of 500,000,000 years of evolution, many of those structures migrated into the mouth cavity. In addition, the total number of teeth per dentition generally decreased and teeth morphological complexity increased. Teeth form mainly on the jaws within the mouth cavity through mutual, delicate interactions between dental epithelium and oral ectomesenchyme. These interactions involve spatially restricted expression of several, teeth-related genes and the secretion of various transcription and signaling factors. Congenital disturbances in tooth formation, acquired dental diseases and odontogenic tumors affect millions of people and rank human oral pathology as the second most frequent clinical problem. On the basis of substantial experimental evidence and advances in bioengineering, many scientists strongly believe that a deep knowledge of the evolutionary relationships and the cellular and molecular mechanisms regulating the morphogenesis of a given tooth in its natural position, in vivo, will be useful in the near future to prevent and treat teeth pathologies and malformations and for in vitro and in vivo teeth tissue regeneration.

  20. A curriculum vitae of teeth: evolution, generation, regeneration.

    Science.gov (United States)

    Koussoulakou, Despina S; Margaritis, Lukas H; Koussoulakos, Stauros L

    2009-01-01

    The ancestor of recent vertebrate teeth was a tooth-like structure on the outer body surface of jawless fishes. Over the course of 500,000,000 years of evolution, many of those structures migrated into the mouth cavity. In addition, the total number of teeth per dentition generally decreased and teeth morphological complexity increased. Teeth form mainly on the jaws within the mouth cavity through mutual, delicate interactions between dental epithelium and oral ectomesenchyme. These interactions involve spatially restricted expression of several, teeth-related genes and the secretion of various transcription and signaling factors. Congenital disturbances in tooth formation, acquired dental diseases and odontogenic tumors affect millions of people and rank human oral pathology as the second most frequent clinical problem. On the basis of substantial experimental evidence and advances in bioengineering, many scientists strongly believe that a deep knowledge of the evolutionary relationships and the cellular and molecular mechanisms regulating the morphogenesis of a given tooth in its natural position, in vivo, will be useful in the near future to prevent and treat teeth pathologies and malformations and for in vitro and in vivo teeth tissue regeneration.

  1. Managing the severely proclined maxillary anteriors by extracting traumatized right maxillary central incisor

    Directory of Open Access Journals (Sweden)

    Mahesh Jain

    2014-01-01

    Full Text Available A 14-year-old girl reported with severely proclined maxillary anterior teeth with fractured and discolored right maxillary central incisor with questionable prognosis. Autotransplantation of premolar to replace central incisor was considered a risky option as patient was 14-year-old with presence of advanced root development of premolar. The immediate placement of the prosthetic implant was also not possible because of patient′s age. Therefore, it was decided to use the space obtained by extracting questionable maxillary right central incisor for orthodontic purpose and also sacrificing the healthy premolar is invariably an excessive biological cost for a modest functional and aesthetic gain. Hence, the treatment plan for this case includes extraction of right maxillary central incisor and left maxillary first premolar, movement of right maxillary lateral incisor mesially, achieving normal axial inclination of maxillary anteriors with normal overjet and overbite. Mandibular arch was treated nonextraction due to congenitally missing central incisors with presence of normally inclined lower anteriors thereby maintaining Angles class I occlusion. Tipping, usually, seen in Begg mechanotherapy was used for our advantage to correct severely proclined maxillary anteriors with simultaneous bite opening mechanics. Case was completed in 19 months and posttreatment records including photographs, radiographs and study models were made. Begg wrap around the retainer was placed in the maxillary arch allowing natural settling of occlusion.

  2. POST-MORTEM CHANGES IN TEETH- FORENSIC ISSUES

    Directory of Open Access Journals (Sweden)

    Irina MANOILESCU

    2015-12-01

    Full Text Available Teeth have an increased resistance to environmental factors and decomposition processes, which makes them highly valuable in forensic investigations. The either physical (wind, water, sun, soil type or biological (plant roots, insects, animals environmental factors and the decomposition processes induce post-mortem changes in teeth, which are relevant to forensic investigation in terms of estimating the post-mortem interval or of elucidating the conditions in which the body stood after death. In this paper, based on the data provided in the literature, the authors present the main changes induced by environmental factors and decomposition processes in teeth and refer to their relevance in forensic activity.

  3. Procedure for the automatic mesh generation of innovative gear teeth

    Directory of Open Access Journals (Sweden)

    Radicella Andrea Chiaramonte

    2016-01-01

    Full Text Available After having described gear wheels with teeth having the two sides constituted by different involutes and their importance in engineering applications, we stress the need for an efficient procedure for the automatic mesh generation of innovative gear teeth. First, we describe the procedure for the subdivision of the tooth profile in the various possible cases, then we show the method for creating the subdivision mesh, defined by two series of curves called meridians and parallels. Finally, we describe how the above procedure for automatic mesh generation is able to solve specific cases that may arise when dealing with teeth having the two sides constituted by different involutes.

  4. An ancient dental gene set governs development and continuous regeneration of teeth in sharks.

    Science.gov (United States)

    Rasch, Liam J; Martin, Kyle J; Cooper, Rory L; Metscher, Brian D; Underwood, Charlie J; Fraser, Gareth J

    2016-07-15

    The evolution of oral teeth is considered a major contributor to the overall success of jawed vertebrates. This is especially apparent in cartilaginous fishes including sharks and rays, which develop elaborate arrays of highly specialized teeth, organized in rows and retain the capacity for life-long regeneration. Perpetual regeneration of oral teeth has been either lost or highly reduced in many other lineages including important developmental model species, so cartilaginous fishes are uniquely suited for deep comparative analyses of tooth development and regeneration. Additionally, sharks and rays can offer crucial insights into the characters of the dentition in the ancestor of all jawed vertebrates. Despite this, tooth development and regeneration in chondrichthyans is poorly understood and remains virtually uncharacterized from a developmental genetic standpoint. Using the emerging chondrichthyan model, the catshark (Scyliorhinus spp.), we characterized the expression of genes homologous to those known to be expressed during stages of early dental competence, tooth initiation, morphogenesis, and regeneration in bony vertebrates. We have found that expression patterns of several genes from Hh, Wnt/β-catenin, Bmp and Fgf signalling pathways indicate deep conservation over ~450 million years of tooth development and regeneration. We describe how these genes participate in the initial emergence of the shark dentition and how they are redeployed during regeneration of successive tooth generations. We suggest that at the dawn of the vertebrate lineage, teeth (i) were most likely continuously regenerative structures, and (ii) utilised a core set of genes from members of key developmental signalling pathways that were instrumental in creating a dental legacy redeployed throughout vertebrate evolution. These data lay the foundation for further experimental investigations utilizing the unique regenerative capacity of chondrichthyan models to answer evolutionary

  5. An ancient dental gene set governs development and continuous regeneration of teeth in sharks.

    Science.gov (United States)

    Rasch, Liam J; Martin, Kyle J; Cooper, Rory L; Metscher, Brian D; Underwood, Charlie J; Fraser, Gareth J

    2016-07-15

    The evolution of oral teeth is considered a major contributor to the overall success of jawed vertebrates. This is especially apparent in cartilaginous fishes including sharks and rays, which develop elaborate arrays of highly specialized teeth, organized in rows and retain the capacity for life-long regeneration. Perpetual regeneration of oral teeth has been either lost or highly reduced in many other lineages including important developmental model species, so cartilaginous fishes are uniquely suited for deep comparative analyses of tooth development and regeneration. Additionally, sharks and rays can offer crucial insights into the characters of the dentition in the ancestor of all jawed vertebrates. Despite this, tooth development and regeneration in chondrichthyans is poorly understood and remains virtually uncharacterized from a developmental genetic standpoint. Using the emerging chondrichthyan model, the catshark (Scyliorhinus spp.), we characterized the expression of genes homologous to those known to be expressed during stages of early dental competence, tooth initiation, morphogenesis, and regeneration in bony vertebrates. We have found that expression patterns of several genes from Hh, Wnt/β-catenin, Bmp and Fgf signalling pathways indicate deep conservation over ~450 million years of tooth development and regeneration. We describe how these genes participate in the initial emergence of the shark dentition and how they are redeployed during regeneration of successive tooth generations. We suggest that at the dawn of the vertebrate lineage, teeth (i) were most likely continuously regenerative structures, and (ii) utilised a core set of genes from members of key developmental signalling pathways that were instrumental in creating a dental legacy redeployed throughout vertebrate evolution. These data lay the foundation for further experimental investigations utilizing the unique regenerative capacity of chondrichthyan models to answer evolutionary

  6. Accuracy of Demirjian′s 8 teeth method for age prediction in South Indian children: A comparative study

    Directory of Open Access Journals (Sweden)

    Rezwana Begum Mohammed

    2015-01-01

    Full Text Available Introduction: Demirjian′s method of tooth development is most commonly used to assess age in individuals with emerging teeth. However, its application on numerous populations has resulted in wide variations in age estimates and consequent suggestions for the method′s adaptation to the local sample. Original Demirjian′s method utilized seven mandibular teeth, to which recently third molar is added so that the method can be applied on a wider age group. Furthermore, the revised method developed regression formulas for assessing age. In Indians, as these formulas resulted in underestimation, India-specific regression formulas were developed recently. The purpose of this cross-sectional study was to evaluate the accuracy and applicability of original regression formulas (Chaillet and Demirjian 2004 and India-specific regression formulas (Acharya 2010 using Demirjian′s 8 teeth method in South Indian children of age groups 9-20 years. Methods: The present study consisted of 660 randomly selected subjects (330 males and 330 females were in the aged ranging from 9 to 20 years divided into 11 groups according to their age. Demirjian′s 8 teeth method was used for staging of teeth. Results: Demirjian′s method underestimated the dental age (DA by 1.66 years for boys and 1.55 years for girls and 1.61 years in total. Acharya′s method over estimated DA by 0.21 years for boys and 0.85 years for girls and 0.53 years in total. The absolute accuracy was better for Acharya′s method compared with Demirjian method. Conclusion: This study concluded that both the Demirjian and Indian regression formulas were reliable in assessing age making Demirjian′s 8 teeth method applicable for South Indians.

  7. Oral biofilm architecture on natural teeth.

    Directory of Open Access Journals (Sweden)

    Vincent Zijnge

    Full Text Available Periodontitis and caries are infectious diseases of the oral cavity in which oral biofilms play a causative role. Moreover, oral biofilms are widely studied as model systems for bacterial adhesion, biofilm development, and biofilm resistance to antibiotics, due to their widespread presence and accessibility. Despite descriptions of initial plaque formation on the tooth surface, studies on mature plaque and plaque structure below the gum are limited to landmark studies from the 1970s, without appreciating the breadth of microbial diversity in the plaque. We used fluorescent in situ hybridization to localize in vivo the most abundant species from different phyla and species associated with periodontitis on seven embedded teeth obtained from four different subjects. The data showed convincingly the dominance of Actinomyces sp., Tannerella forsythia, Fusobacterium nucleatum, Spirochaetes, and Synergistetes in subgingival plaque. The latter proved to be new with a possibly important role in host-pathogen interaction due to its localization in close proximity to immune cells. The present study identified for the first time in vivo that Lactobacillus sp. are the central cells of bacterial aggregates in subgingival plaque, and that Streptococcus sp. and the yeast Candida albicans form corncob structures in supragingival plaque. Finally, periodontal pathogens colonize already formed biofilms and form microcolonies therein. These in vivo observations on oral biofilms provide a clear vision on biofilm architecture and the spatial distribution of predominant species.

  8. Oral biofilm architecture on natural teeth.

    Science.gov (United States)

    Zijnge, Vincent; van Leeuwen, M Barbara M; Degener, John E; Abbas, Frank; Thurnheer, Thomas; Gmür, Rudolf; Harmsen, Hermie J M

    2010-02-24

    Periodontitis and caries are infectious diseases of the oral cavity in which oral biofilms play a causative role. Moreover, oral biofilms are widely studied as model systems for bacterial adhesion, biofilm development, and biofilm resistance to antibiotics, due to their widespread presence and accessibility. Despite descriptions of initial plaque formation on the tooth surface, studies on mature plaque and plaque structure below the gum are limited to landmark studies from the 1970s, without appreciating the breadth of microbial diversity in the plaque. We used fluorescent in situ hybridization to localize in vivo the most abundant species from different phyla and species associated with periodontitis on seven embedded teeth obtained from four different subjects. The data showed convincingly the dominance of Actinomyces sp., Tannerella forsythia, Fusobacterium nucleatum, Spirochaetes, and Synergistetes in subgingival plaque. The latter proved to be new with a possibly important role in host-pathogen interaction due to its localization in close proximity to immune cells. The present study identified for the first time in vivo that Lactobacillus sp. are the central cells of bacterial aggregates in subgingival plaque, and that Streptococcus sp. and the yeast Candida albicans form corncob structures in supragingival plaque. Finally, periodontal pathogens colonize already formed biofilms and form microcolonies therein. These in vivo observations on oral biofilms provide a clear vision on biofilm architecture and the spatial distribution of predominant species.

  9. Enhancement of two-photon transition rate by selectively removing certain frequency comb teeth

    CERN Document Server

    Zhang, Shuangyou; Zhao, Jianye

    2015-01-01

    We present experiments demonstrating an enhancement of resonant two-photon transition rate in 87Rb utilizing spectral phase manipulation of the excitation frequency comb. By selectively removing certain comb teeth, the resonant two-photon transition rate can be improved, and reach a factor of more than 1.8. The femtosecond pulse-train excitation of two-photon transition is investigated theoretically based on general multiphoton transitions and the results are compared with the experiments. The theory presented here gives a clear insight of physical mechanism of this quantum coherent control and indicates that it is simple, effective and universal for nonlinear interactions between frequency combs and matters.

  10. Anterior chest wall examination reviewed

    Directory of Open Access Journals (Sweden)

    F. Trotta

    2011-09-01

    Full Text Available Anterior chest wall involvement is not infrequently observed within inflammatory arthropaties, particularly if one considers seronegative spondiloarthritides and SAPHO syndrome. Physical examination is unreliable and conventional X-rays analysis is an unsatisfactory tool during diagnostic work-up of this region. Scintigraphic techniques yield informations both on the activity and on the anatomical extent of the disease while computerized tomography visualize the elementary lesions, such as erosions, which characterize the process. Moreover, when available, magnetic resonance imaging couple the ability to finely visualize such lesions with the possibility to show early alterations and to characterize the “activity” of the disease, presenting itself as a powerful tool both for diagnosis and follow-up. This review briefly shows the applications of imaging techniques for the evaluation of the anterior chest wall focusing on what has been done in the SAPHO syndrome which can be considered prototypical for this regional involvement since it is the osteo-articular target mainly affected by the disease.

  11. Multiple teeth fractures in dentinogenesis imperfecta: a case report.

    Science.gov (United States)

    Min, Boram; Song, Je Seon; Lee, Jae-Ho; Choi, Byung-Jai; Kim, Kwang-Mahn; Kim, Seong-Oh

    2014-01-01

    Dentinogenesis imperfecta (DGI) is a hereditary defect consisting of opalescent teeth composed of irregularly formed and hypomineralized dentin. This paper presents the multiple fractures of DGI-affected teeth and suggests the reason of low fracture resistance by observing the dentin microstructures directly using scanning electron microscope (SEM) and by measuring its surface hardness using the Vickers hardness test. SEM revealed that while the enamel microstructure was similar in the DGI-affected and normal teeth, the microstructure of the DGI-affected dentin was poorly woven and more loosely packed than that of the normal dentin. The Vickers hardness of the DGI-affected dentin was 4.89 times softer than the normal dentin. The low fracture resistance of DGI-affected teeth can be attributed to the poorly woven microstructure of their dentin, which leads to a reduction in hardness.

  12. Chediak-Higashi syndrome and premature exfoliation of primary teeth.

    Science.gov (United States)

    Rezende, Karla Mayra; Canela, Alfredo Hiram Carrillo; Ortega, Adriana Oliveira Lira; Tintel, Claudia; Bönecker, Marcelo

    2013-01-01

    The Chediak-Higashi syndrome (CHS) is a rare hereditary fatal disease, if not treated. These changes are associated with various diseases and syndromes that mainly cause periodontal disease and thus the premature loss of teeth. This paper describes the monitoring of premature loss of primary teeth that began when the child was 5 years old. On presentation his teeth were mobile and there was a history of gingival bleeding. Panoramic radiography revealed generalized and severe bone loss, and the teeth showed no bony support enough for their stability. Blood test was ordered to assess the overall health of the child and giant cells with cytoplasmic granules were found, confirming the diagnosis of CHS. The management of periodontal disease focused on the control of infection and bacterial plaque by mechanical and chemical methods.

  13. Premature exfoliation of teeth in childhood and adolescence.

    Science.gov (United States)

    Hartsfield, J K

    1994-01-01

    Although the premature loss of primary teeth in conjunction with early eruption may be of no clinical significance, the loss of primary or permanent teeth in the absence of trauma should not be overlooked by the clinician. Premature loss of teeth associated with systemic disease usually results from some change in the immune system or connective tissue. This chapter presented some conditions associated with loosening and/or premature loss of teeth that may be encountered in children and adolescents. The most common of these conditions appear to be hypophosphatasia and early-onset periodontitis. Other less common conditions were described to aid in forming a differential diagnosis. Other diseases that may manifest with severe oral infection, such as Wiskott-Aldrich syndrome, diabetes mellitus, or herpes zoster, could result in early tooth loss.

  14. The innervation of the zebrafish pharyngeal jaws and teeth.

    Science.gov (United States)

    Crucke, Jeroen; Van de Kelft, Annelore; Huysseune, Ann

    2015-07-01

    Zebrafish (Danio rerio) teeth are increasingly used as a model to study odontogenesis in non-mammalians. Using serial semi-thin section histology and immunohistochemistry, the nerves innervating the pharyngeal jaws and teeth have been identified. The last pair of branchial arches, which are non-gill bearing but which carry the teeth, are innervated by an internal branch of a post-trematic ramus of the vagal nerve. Another, external, branch is probably responsible for the motor innervation of the branchiomeric musculature. Nerve fibres appear in the pulp cavity of the teeth only late during cytodifferentiation, and are therefore likely not involved in early steps of tooth formation. The precise role of the nervous system during continuous tooth replacement remains to be determined. Nonetheless, this study provides the necessary morphological background information to address this question. PMID:26018453

  15. The longevity of different restorations in primary teeth

    DEFF Research Database (Denmark)

    Qvist, Vibeke; Poulsen, Agneta; Teglers, Poul Thorpen;

    2010-01-01

    This paper reviews three published papers and adds results from a fourth study which aimed to determine which restorative material would be the best alternative(s) to amalgam (AM) in primary teeth....

  16. Computerized 3-D reconstruction of two "double teeth".

    Science.gov (United States)

    Lyroudia, K; Mikrogeorgis, G; Nikopoulos, N; Samakovitis, G; Molyvdas, I; Pitas, I

    1997-10-01

    "Double teeth" is a root malformation in the dentition and the purpose of this study was to reconstruct three-dimensionally the external and internal morphology of two "double teeth". The first set of "double teeth" was formed by the conjunction of a mandibular molar and a premolar, and the second by a conjunction of a maxillary molar and a supernumerary tooth. The process of 3-D reconstruction included serial cross-sectioning, photographs of the sections, digitization of the photographs, extraction of the boundaries of interest for each section, surface representation using triangulation and, finally, surface rendering using photorealistic effects. The resulting three-dimensional representations of the two teeth helped us visualize their external and internal anatomy. The results showed: a) in the first case, fusion of the radical and coronal dentin, as well as fusion of the pulp chambers; and b) in the second case, fusion only of the radical dentin and the pulp chambers. PMID:9550051

  17. Pharyngocutaneous fistula after anterior cervical spine surgery

    OpenAIRE

    Sansur, Charles A.; Early, Stephen; Reibel, James; Arlet, Vincent

    2009-01-01

    Pharyngocutaneous fistulae are rare complications of anterior spine surgery occurring in less than 0.1% of all anterior surgery cases. We report a case of a 19 year old female who sustained a C6 burst fracture with complete quadriplegia. She was treated urgently with a C6 corpectomy with anterior cage and plating followed by posterior cervical stabilization at another institution. Post operatively she developed a pharyngocutaneous fistula that failed to heal despite several attempts of closu...

  18. Incidental Anterior Cruciate Ligament Calcification: Case Report.

    Science.gov (United States)

    Hayashi, Hisami; Fischer, Hans

    2016-03-01

    The calcification of knee ligaments is a finding noted only in a handful of case reports. The finding of an anterior cruciate ligament calcification has been reported once in the literature. Comparable studies involving the posterior cruciate ligament, medial collateral ligament and an ossicle within the anterior cruciate ligament are likewise discussed in reports of symptomatic patients. We report a case of incidentally discovered anterior cruciate ligament calcification. We discuss the likely etiology and clinical implications of this finding.

  19. Pulp microbiology of complete teeth with idiopathic apical lesions.

    OpenAIRE

    Patricia Rodríguez; Jesús Alberto Calero

    2009-01-01

    Introduction: Periapical changes named as lesions, in teeth with full crown integrity and without history of trauma, do not show a clear aetiology. Objective: To determine the presence of microorganisms in pulp dental tissue will clarify the cause of its death and therefore the damage to periodontal tissues. Materials and methods: From people between 10 and 39 years old, 23 teeth were selected. The samples were taken with paper points and 0.8 sterile files, and were transported in VMGA III me...

  20. Histologic properties of the pulp and dentin in primary teeth

    OpenAIRE

    Özçobanoğlu, Gözdem; Durutürk, Leyla

    2013-01-01

    Many teeth, especially the primary teeth are lost prematurely despite advancements in the prevention of dental caries and increasing recognition of the importance of natural dentition. These losses may lead to malocclusion or temporary or permanent esthetic, phonetic and functional problems. Preservation of the integrity and health of oral tissues is the main target in dental pulp treatments. Although the dental pulp is similar to other loose connective tissues of the body, it differs in some...

  1. Teeth Grinding: Is Emotional Stability related to Bruxism?

    OpenAIRE

    Sutin, Angelina R.; Terracciano, Antonio; Ferrucci, Luigi; Costa, Paul T.

    2010-01-01

    This study examines the association between personality traits and bruxism, the repetitive grinding or clenching of teeth. Community-dwelling participants (N = 470) had a comprehensive oral examination by a dentist and completed a dental history and personality questionnaires. Consistent with the literature on state anxiety and depression as antecedents of bruxism, Neuroticism-related traits were associated with self-reported teeth grinding. These traits were also associated with other oral c...

  2. A histological study of the innervation of developing mouse teeth.

    OpenAIRE

    Mohamed, S. S.; Atkinson, M E

    1983-01-01

    The innervation of developing mouse teeth between initial formation and crown formation was investigated using silver-stained serial sections. The developing innervation correlated with the stage of development of individual teeth rather than the chronological age of the mice. Nerves approached the developing dental papilla during the bud stage and formed a basal plexus below the dental papilla in the early cap stage. Nerve fibres from this plexus spread into the dental follicle as it began t...

  3. Characteristics of nonsyndromic supernumerary teeth in children and adolescents

    OpenAIRE

    KARAYILMAZ, Hüseyin; KIRZIOĞLU, Zuhal; SARITEKİN, Ayşegül

    2013-01-01

    'Supernumerary teeth' (ST) is a term used to describe extra teeth in both dentitions than those that we are predisposed to have and considered to be one of the most significant dental anomalies affecting children and adolescents. Diagnosis and management of ST is one of the main responsibilities of dentists and also physicians. The aims of this study were to document the prevalence, characteristics, and associated clinical complications of ST among children and adolescents and to su...

  4. Odontomas and Supernumerary Teeth: Is There a Common Origin?

    OpenAIRE

    Pippi, Roberto

    2014-01-01

    The aim of the present work is to analyze all scientific evidence to verify whether similarities supporting a unified explanation for odontomas and supernumerary teeth exist. A literature search was first conducted for epidemiologic studies indexed by PubMed, to verify their worldwide incidence. The analysis of the literature data shows some interesting similarities between odontomas and supernumerary teeth concerning their topographic distribution and pathologic manifestations. There is also...

  5. Comparative anatomy of teeth from past to present.

    OpenAIRE

    Alt K; Tuerp J; Brace C; Radlanski R

    1997-01-01

    The comparative anatomy of teeth has a long tradition in research, starting more than two thousand years ago in antiquity. In the 19th century, Richard Owen′s oeuvre Odontography (1840-45) contributed much to establish odontology as an independent scientific discipline. After a short outline of the historical development of the comparative anatomy of teeth, we describe the contents and importance of Owen′s Odontography. Finally, we sketch the contemporary situation of dental mor...

  6. Herniation of the anterior lens capsule

    Directory of Open Access Journals (Sweden)

    Pereira Nolette

    2007-01-01

    Full Text Available Herniation of the anterior lens capsule is a rare abnormality in which the capsule bulges forward in the pupillary area. This herniation can be mistaken for an anterior lenticonus where both the capsule and the cortex bulge forward. The exact pathology behind this finding is still unclear. We report the clinical, ultrasound biomicroscopy (UBM and histopathological findings of a case of herniation of the anterior lens capsule. UBM helped to differentiate this entity from anterior lenticonus. Light microscopy revealed capsular splitting suggestive of capsular delamination and collection of fluid (aqueous in the area of herniation giving it a characteristic appearance.

  7. Evaluation the prevalence of permanent anterior crown fracture and its relevant between 7-14 years students in Tehran, year of 1375

    Directory of Open Access Journals (Sweden)

    Mahmodian J

    1999-01-01

    Full Text Available Anterior tooth crown fracture in children is something that each dentist will confront"nmany times during his professional career."nWe studied the prevalence of anterior teeth crown fractures between 7-14 years old students in"nTehran and some relevant factors like sex, age, the traumatized tooth, amount of overbite and"noverjet, upper lip coverage, jaw that had fractured tooth or teeth and place of fracture in fractured"ncrown."n1338 boys and 1184 girls were in this study. Tooth fracture was almost the same in boys and"n1184 girls with the prevalence of 8%. Fracture was mostly in enamel and average year of"nfracture was 10 years."nIncreased overjet and overbite had direct relation and indirect relation with fracture, also enough"nlip coverage showed less fracture.

  8. Perawatan Gigitan Terbalik Anterior Dengan Menggunakan Inclined Plane

    OpenAIRE

    Siregar, Wilda A.

    2008-01-01

    Gigitan terbalik anterior adalah suatu anomali posisi gigi anterior atas yang lebih ke lingual dibandingkan gigi anterior bawah. Anomali gigitan terbalik anterior dapat ditemui pada periode gigi sulung, gigi bercampur, dan gigi permanen. Faktor etiologi gigitan terbalik anterior dibedakan atas dental, fungsional atau skeletal. Untuk menentukan etiologi dari anomali gigitan terbalik anterior perlu dilakukan diagnosa yang tepat. Perawatan gigitan terbalik anterior ini dapat dilakukan de...

  9. Comparative analysis of human and bovine teeth: radiographic density

    Directory of Open Access Journals (Sweden)

    Jefferson Luis Oshiro Tanaka

    2008-12-01

    Full Text Available Since bovine teeth have been used as substitutes for human teeth in in vitro dental studies, the aim of this study was to compare the radiographic density of bovine teeth with that of human teeth to evaluate their usability for radiographic studies. Thirty bovine and twenty human teeth were cut transversally in 1 millimeter-thick slices. The slices were X-rayed using a digital radiographic system and an intraoral X-ray machine at 65 kVp and 7 mA. The exposure time (0.08 s and the target-sensor distance (40 cm were standardized for all the radiographs. The radiographic densities of the enamel, coronal dentin and radicular dentin of each slice were obtained separately using the "histogram" tool of Adobe Photoshop 7.0 software. The mean radiographic densities of the enamel, coronal dentin and radicular dentin were calculated by the arithmetic mean of the slices of each tooth. One-way ANOVA demonstrated statistically significant differences for the densities of bovine and human enamel (p 0.05. Based on the results, the authors concluded that: a the radiographic density of bovine enamel is significantly higher than that of human enamel; b the radiodensity of bovine coronal dentin is statistically lower than the radiodensity of human coronal dentin; bovine radicular dentin is also less radiodense than human radicular dentin, although this difference was not statistically significant; c bovine teeth should be used with care in radiographic in vitro studies.

  10. Reliability of conventional shade guides in teeth color determination

    Directory of Open Access Journals (Sweden)

    Todorović Ana

    2013-01-01

    Full Text Available Background/Aim. Color matching in prosthodontic therapy is a very important task because it influences the esthetic value of dental restorations. Visual shade matching represents the most frequently applied method in clinical practice. Instrumental measurements provide objective and quantified data in color assessment of natural teeth and restorations. In instrumental shade analysis, the goal is to achieve the smallest ΔE value possible, indicating the most accurate shade match. The aim of this study was to evaluate the reliability of commercially available ceramic shade guides. Methods. VITA Easyshade spectrophotometer (VITA, Germany was used for instrumental color determination. Utilizing this device, color samples of ten VITA Classical and ten VITA 3D - Master shade guides were analyzed. Each color sample from all shade guides was measured three times and the basic parameters of color quality were examined: ΔL, ΔC, ΔH, ΔE, ΔElc. Based on these parameters spectrophotometer marks the shade matching as good, fair or adjust. Results. After performing 1,248 measurements of ceramic color samples, frequency of evaluations adjust, fair and good were statistically significantly different between VITA Classical and VITA 3D Master shade guides (p = 0.002. There were 27.1% cases scored as adjust, 66.3% as fair and 6.7% as good. In VITA 3D - Master shade guides 30.9% cases were evaluated as adjust, 66.4% as fair and 2.7% cases as good. Conclusion. Color samples from different shade guides, produced by the same manufacturer, show variability in basic color parameters, which once again proves the lack of precision and nonuniformity of the conventional method.

  11. Toxic Anterior Segment Syndrome (TASS

    Directory of Open Access Journals (Sweden)

    Özlem Öner

    2011-12-01

    Full Text Available Toxic anterior segment syndrome (TASS is a sterile intraocular inflammation caused by noninfectious substances, resulting in extensive toxic damage to the intraocular tissues. Possible etiologic factors of TASS include surgical trauma, bacterial endotoxin, intraocular solutions with inappropriate pH and osmolality, preservatives, denatured ophthalmic viscosurgical devices (OVD, inadequate sterilization, cleaning and rinsing of surgical devices, intraocular lenses, polishing and sterilizing compounds which are related to intraocular lenses. The characteristic signs and symptoms such as blurred vision, corneal edema, hypopyon and nonreactive pupil usually occur 24 hours after the cataract surgery. The differential diagnosis of TASS from infectious endophthalmitis is important. The main treatment for TASS formation is prevention. TASS is a cataract surgery complication that is more commonly seen nowadays. In this article, the possible underlying causes as well as treatment and prevention methods of TASS are summarized. (Turk J Oph thal mol 2011; 41: 407-13

  12. Horace Wellsの"An Essay on Teeth"(1838年刊)について

    OpenAIRE

    市川, 博保

    1994-01-01

    This year will mark the 150 anniversary of Hartford dentist Horace Wells' (1815-48) first use of 'laughing gas' (nitrous oxide) with good results in removing teeth. Horace Wells published "An Essay on Teeth" in 1838. I will review this book. The eight chapters are as follows: 1. Formation and development of Teeth 2. Organization of Teeth 3. Caries of Teeth 4. Cause of Caries 5. Tooth-ache 6. Disease of the Fangs of Teeth 7. Cleansing of Teeth 8. Dental Surgery

  13. Mild toxic anterior segment syndrome mimicking delayed onset toxic anterior segment syndrome after cataract surgery

    Directory of Open Access Journals (Sweden)

    Su-Na Lee

    2014-01-01

    Full Text Available Toxic anterior segment syndrome (TASS is an acute sterile postoperative anterior segment inflammation that may occur after anterior segment surgery. I report herein a case that developed mild TASS in one eye after bilateral uneventful cataract surgery, which was masked during early postoperative period under steroid eye drop and mimicking delayed onset TASS after switching to weaker steroid eye drop.

  14. Anterior segment complications of retinal photocoagulation.

    Science.gov (United States)

    Kanski, J J

    1975-03-01

    Seven patients had anterior segment complications following xenon arc retinal photocoagulation. Irreversible keratopathy was induced in two cases; all patients showed evidence of iris injury. The absorption of radiation by the iris was considered the main factor in producing overheating of the anterior segment.

  15. Totally thrombosed giant anterior communicating artery aneurysm

    Directory of Open Access Journals (Sweden)

    V R Roopesh Kumar

    2015-01-01

    Full Text Available Giant anterior communicating artery aneurysmsarerare. Apatient presented with visual dysfunction, gait ataxia and urinary incontinence. MRI showed a giant suprasellar mass.At surgery, the lesion was identified as being an aneurysm arising from the anterior communicating artery.The difficulty in preoperative diagnosis and relevant literature are reviewed.

  16. Evaluation of Reasons of Permanent Teeth Extraction in Iranian People (2009)

    OpenAIRE

    Kakoei S.; Fatemian M.; Eskandari Zadeh A.; Parirokh M.; AA Haghdoost

    2012-01-01

    Statement of Problem: Everyday, many people lose their teeth because of various reasons. Knowing the reasons of tooth extraction would help officials to make decisions for helping patients saving their teeth.Purpose: The aim of this study was to investigate the reasons of teeth extraction in dental clinics and some private offices in the city of Kerman in November 2009- February 2010.Materials and Method: In this cross-sectional study, the reasons of teeth extraction in 2076 teeth from 1500 p...

  17. Shoulder Magnetic Resonance Arthrography: A Prospective Randomized Study of Anterior and Posterior Ultrasonography-Guided Contrast Injections

    Energy Technology Data Exchange (ETDEWEB)

    Koivikko, M.P.; Mustonen, A.O.T. (Dept. of Radiology, Helsinki Univ. Central Hospital, Helsinki (Finland))

    2008-10-15

    Background: Magnetic resonance (MR) arthrography is an accurate imaging method for internal shoulder derangements and rotator cuff pathologies. Both anterior and posterior contrast injection techniques, under palpatory, fluoroscopic, or ultrasonographic guidance have been described in the literature. However, clinical comparisons of the injection techniques remain few. Purpose: To compare the performance of anterior and posterior ultrasonography (US)-guided arthrography injections of the shoulder regarding patient discomfort and influence on diagnostic MR reading, and to illustrate the typical artifacts resulting from contrast leakage in the respective techniques. Material and Methods: 43 MR arthrographies were prospectively randomized into anterior and posterior US-guided contrast injections and performed by two radiologists, with the study of artifacts from contrast leakage. Pain from the injections was assessed by a survey utilizing a 100-mm visual analogue scale (VAS). Results: Of the 23 anterior injections, nine caused contrast artifacts in the subscapular tendon, and in three the leakage extended further anteriorly. Of the 20 posterior injections, 12 showed injection artifacts of the rotator cuff, extending outside the cuff in seven. Two of the anterior and none of the posterior artifacts compromised diagnostic quality. In posterior injections, the leakage regularly occurred at the caudal edge of the infraspinatus muscle and was easily distinguishable from rotator cuff tears. All patients completed the pain survey. Mean VAS scores were 25.0 (median 18, SD 22) for anterior, and 25.4 (median 16, SD 25) for posterior injections. The two radiologists achieved different mean VAS scores but closely agreed as to anterior and posterior VAS scores. Conclusion: Arthrography injections were fairly simple to perform under US guidance. Patient discomfort for anterior and posterior injections was equally minor. A tailored approach utilizing anterior or posterior injections

  18. Shoulder Magnetic Resonance Arthrography: A Prospective Randomized Study of Anterior and Posterior Ultrasonography-Guided Contrast Injections

    International Nuclear Information System (INIS)

    Background: Magnetic resonance (MR) arthrography is an accurate imaging method for internal shoulder derangements and rotator cuff pathologies. Both anterior and posterior contrast injection techniques, under palpatory, fluoroscopic, or ultrasonographic guidance have been described in the literature. However, clinical comparisons of the injection techniques remain few. Purpose: To compare the performance of anterior and posterior ultrasonography (US)-guided arthrography injections of the shoulder regarding patient discomfort and influence on diagnostic MR reading, and to illustrate the typical artifacts resulting from contrast leakage in the respective techniques. Material and Methods: 43 MR arthrographies were prospectively randomized into anterior and posterior US-guided contrast injections and performed by two radiologists, with the study of artifacts from contrast leakage. Pain from the injections was assessed by a survey utilizing a 100-mm visual analogue scale (VAS). Results: Of the 23 anterior injections, nine caused contrast artifacts in the subscapular tendon, and in three the leakage extended further anteriorly. Of the 20 posterior injections, 12 showed injection artifacts of the rotator cuff, extending outside the cuff in seven. Two of the anterior and none of the posterior artifacts compromised diagnostic quality. In posterior injections, the leakage regularly occurred at the caudal edge of the infraspinatus muscle and was easily distinguishable from rotator cuff tears. All patients completed the pain survey. Mean VAS scores were 25.0 (median 18, SD 22) for anterior, and 25.4 (median 16, SD 25) for posterior injections. The two radiologists achieved different mean VAS scores but closely agreed as to anterior and posterior VAS scores. Conclusion: Arthrography injections were fairly simple to perform under US guidance. Patient discomfort for anterior and posterior injections was equally minor. A tailored approach utilizing anterior or posterior injections

  19. The anterior tooth development of cattle presented for slaughter: an analysis of age, sex and breed.

    Science.gov (United States)

    Whiting, K J; Brown, S N; Browne, W J; Hadley, P J; Knowles, T G

    2013-08-01

    In a cross-sectional study, data from records of cattle slaughtered over a 1-year period at a large abattoir in South West England were analysed using an ordered category response model to investigate the inter-relationships between age, sex and breed on development of the permanent anterior (PA) teeth. Using the model, transition points at which there was a 50% probability of membership of each category of paired PA teeth were identified. Data from ∼60,000 animals were initially analysed for age and sex effect. The age transition was found to be ∼23 months moving from zero to two teeth; 30 months for two to four teeth; 37 months for four to six teeth and 42 months for six to eight teeth. Males were found to develop, on average, ∼22 days earlier than females across all stages. A reduced data set of ∼23,000 animals registered as pure-bred only was used to compare breed and type interactions and to investigate sex effects within the sub-categories. Breeds were grouped into dairy and beef-type and beef breeds split into native and continental. It was found that dairy-types moved through the transition points earlier than beef-types across all stages (interval varying between ∼8 and 12 weeks) and that collectively, native beef breeds moved through the transition points by up to 3 weeks earlier than the continental beef breeds. Interestingly, in contrast to beef animals, dairy females matured before dairy males. However, the magnitude of the difference between dairy females and males diminished at the later stages of development. Differences were found between breeds. Across the first three stages, Ayrshires and Guernseys developed between 3 and 6 weeks later than Friesian/Holsteins and Simmental, Limousin and Blonde Aquitaine 6 and 8 weeks later than Aberdeen Angus. Herefords, Charolais and South Devon developed later but by a smaller interval and Red Devon and Galloway showed the largest individual effect with transition delayed by 8 to 12 weeks.

  20. A method of improved Bolton index of anterior teeth%改良式Bolton前牙指数分析法

    Institute of Scientific and Technical Information of China (English)

    钱成明; 毛峻武; 蒋桂林

    2009-01-01

    目的:对Bolton前牙指数的不足进行改良.方法:取200名(男女各半)广西壮族恒牙前期正常胎儿童的牙(牙合)模型,测量上下切牙近远中宽度,两者和的比值即为改良Bolton前牙指数.结果:改良Bolton前牙指数男性为76.97,女性为74.07.结论:上下颌切牙量的不调是引起错(牙合)畸形的常见原因,用改良Bolton前牙指数预测覆(牙合)覆盖关系及上下颌牙量不调有一定意义.

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

    OpenAIRE

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

    2015-01-01

    Introduction 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. Case presentation A 34-year-old systemically healthy Malay woman was referred to the Periodontics Spec...

  2. Aesthetic restoration of deciduous anterior teeth after removal of carious tissue with Papacárie ®

    Directory of Open Access Journals (Sweden)

    Motta Lara

    2009-01-01

    Full Text Available The development of conservative techniques for the removal of carious tissue and the improvement of dental restoration materials allow better preservation of the dental structure. Chemomechanical caries removal is a conservative and atraumatic alternative. Papacárie ® is a papain-based material developed to act only on the carious dentin, allowing its easy removal with a blunt curette. This study aims to present a clinical case of aesthetic restoration of both upper deciduous central incisors after the removal of carious tissue with Papacárie ® .

  3. Resin composite restoration in primary anterior teeth using short-post technique and strip crowns: a case report.

    Science.gov (United States)

    Mendes, Fausto Medeiros; De Benedetto, Monique Saveriano; del Conte Zardetto, Cristina Giovannetti; Wanderley, Marcia Turolla; Correa, Maria Salete Nahás Pires

    2004-10-01

    A case report describing a technique for the restoration of endodontically treated primary maxillary incisors with resin composite short posts and celluloid strip crowns in a 3-year-old boy is presented. The technique offers the advantages of using one restorative material, improving esthetics, and reducing chairtime and costs. PMID:15470991

  4. Anterior Shoulder Instability with Concomitant Superior Labrum from Anterior to Posterior (SLAP) Lesion Compared to Anterior Instability without SLAP Lesion

    Science.gov (United States)

    Durban, Claire Marie C.; Kim, Je Kyun; Kim, Sae Hoon

    2016-01-01

    Background The aims of this study were to investigate the clinical characteristics of patients with combined anterior instability and superior labrum from anterior to posterior (SLAP) lesions, and to analyze the effect of concomitant SLAP repair on surgical outcomes. Methods We retrospectively reviewed patients who underwent arthroscopic stabilization for anterior shoulder instability between January 2004 and March 2013. A total of 120 patients were available for at least 1-year follow-up. Forty-four patients with reparable concomitant detached SLAP lesions (group I) underwent combined SLAP and anterior stabilization, and 76 patients without SLAP lesions (group II) underwent anterior stabilization alone. Patient characteristics, preoperative and postoperative pain scores, Rowe scores, and shoulder ranges of motion were compared between the 2 groups. Results Patients in group I had higher incidences of high-energy trauma (p = 0.03), worse preoperative pain visual analogue scale (VAS) (p = 0.02), and Rowe scores (p = 0.04). The postoperative pain VAS and Rowe scores improved equally in both groups without significant differences. Limitation in postoperative range of motion was similar between the groups (all p-value > 0.05). Conclusions Anterior instability with SLAP lesion may not be related to frequent episodes of dislocation but rather to a high-energy trauma. SLAP fixation with anterior stabilization procedures did not lead to poor functional outcomes if appropriate surgical techniques were followed. PMID:27247742

  5. Near-IR imaging of cracks in teeth

    Science.gov (United States)

    Fried, William A.; Simon, Jacob C.; Lucas, Seth; Chan, Kenneth H.; Darling, Cynthia L.; Staninec, Michal; Fried, Daniel

    2014-02-01

    Dental enamel is highly transparent at near-IR wavelengths and several studies have shown that these wavelengths are well suited for optical transillumination for the detection and imaging of tooth decay. We hypothesize that these wavelengths are also well suited for imaging cracks in teeth. Extracted teeth with suspected cracks were imaged at several wavelengths in the near-IR from 1300-1700-nm. Extracted teeth were also examined with optical coherence tomography to confirm the existence of suspected cracks. Several teeth of volunteers were also imaged in vivo at 1300-nm to demonstrate clinical potential. In addition we induced cracks in teeth using a carbon dioxide laser and imaged crack formation and propagation in real time using near-IR transillumination. Cracks were clearly visible using near-IR imaging at 1300-nm in both in vitro and in vivo images. Cracks and fractures also interfered with light propagation in the tooth aiding in crack identification and assessment of depth and severity.

  6. Near-IR imaging of cracks in teeth.

    Science.gov (United States)

    Fried, William A; Simon, Jacob C; Lucas, Seth; Chan, Kenneth H; Darling, Cynthia L; Staninec, Michal; Fried, Daniel

    2014-02-18

    Dental enamel is highly transparent at near-IR wavelengths and several studies have shown that these wavelengths are well suited for optical transillumination for the detection and imaging of tooth decay. We hypothesize that these wavelengths are also well suited for imaging cracks in teeth. Extracted teeth with suspected cracks were imaged at several wavelengths in the near-IR from 1300-1700-nm. Extracted teeth were also examined with optical coherence tomography to confirm the existence of suspected cracks. Several teeth of volunteers were also imaged in vivo at 1300-nm to demonstrate clinical potential. In addition we induced cracks in teeth using a carbon dioxide laser and imaged crack formation and propagation in real time using near-IR transillumination. Cracks were clearly visible using near-IR imaging at 1300-nm in both in vitro and in vivo images. Cracks and fractures also interfered with light propagation in the tooth aiding in crack identification and assessment of depth and severity. PMID:24817806

  7. Demineralization–remineralization dynamics in teeth and bone

    Science.gov (United States)

    Abou Neel, Ensanya Ali; Aljabo, Anas; Strange, Adam; Ibrahim, Salwa; Coathup, Melanie; Young, Anne M; Bozec, Laurent; Mudera, Vivek

    2016-01-01

    Biomineralization is a dynamic, complex, lifelong process by which living organisms control precipitations of inorganic nanocrystals within organic matrices to form unique hybrid biological tissues, for example, enamel, dentin, cementum, and bone. Understanding the process of mineral deposition is important for the development of treatments for mineralization-related diseases and also for the innovation and development of scaffolds. This review provides a thorough overview of the up-to-date information on the theories describing the possible mechanisms and the factors implicated as agonists and antagonists of mineralization. Then, the role of calcium and phosphate ions in the maintenance of teeth and bone health is described. Throughout the life, teeth and bone are at risk of demineralization, with particular emphasis on teeth, due to their anatomical arrangement and location. Teeth are exposed to food, drink, and the microbiota of the mouth; therefore, they have developed a high resistance to localized demineralization that is unmatched by bone. The mechanisms by which demineralization–remineralization process occurs in both teeth and bone and the new therapies/technologies that reverse demineralization or boost remineralization are also scrupulously discussed. Technologies discussed include composites with nano- and micron-sized inorganic minerals that can mimic mechanical properties of the tooth and bone in addition to promoting more natural repair of surrounding tissues. Turning these new technologies to products and practices would improve health care worldwide.

  8. Relationship of deciduous teeth emergence with physical growth

    Directory of Open Access Journals (Sweden)

    Nadia L Soliman

    2012-01-01

    Full Text Available Introduction: Tooth eruption, recognized as an aspect of human growth and development, could possibly be influenced by a number of factors. It may reflect the general body development. Aim: The aim of the present research is to investigate the relationship of deciduous teeth emergence with physical growth (weight/height indices. Materials and Methods: A study was conducted among a sample of 1132 Egyptian infants whose ages range from 4 to 36 months. The sample was collected from some randomly selected health centers affiliated to the ministry of health where various socioeconomic strata from different geographic localities were recruited. The children visit there regularly for vaccination at definite ages. Weight and height were evaluated as factors that might have influence on the time of deciduous teeth emergence. Results: The results showed a certain degree of correlation between the number of deciduous teeth emerged and the studied anthropometric measurements which differed by sex and age. Conclusion: All anthropometric parameters showed relationship with the number of teeth at different levels. Although weight showed influence on the number of teeth emerged, it was less significant than height.

  9. Autosomal recessive mental retardation syndrome with anterior maxillary protrusion and strabismus: MRAMS syndrome.

    Science.gov (United States)

    Basel-Vanagaite, Lina; Rainshtein, Limor; Inbar, Dov; Gothelf, Doron; Hennekam, Raoul; Straussberg, Rachel

    2007-08-01

    We report on a family in whom the combination of mental retardation (MR), anterior maxillary protrusion, and strabismus segregates. The healthy, consanguineous parents (first cousins) of Israeli-Arab descent had 11 children, 7 of whom (5 girls) were affected. They all had severe MR. Six of the seven had anterior maxillary protrusion with vertical maxillary excess, open bite, and prominent crowded teeth. None of the sibs with normal intelligence had jaw or dental anomalies. The child with MR but without a jaw anomaly was somewhat less severely retarded, had seizures and severe psychosis, which may point to his having a separate disorder. Biochemical and neurological studies, including brain MRI and standard cytogenetic studies, yielded normal results; fragile X was excluded, no subtelomeric rearrangements were detectable, and X-inactivation studies in the mother showed random inactivation. We have been unable to find a similar disorder in the literature, and suggest that this is a hitherto unreported autosomal recessive disorder, which we propose to name MRAMS (mental retardation, anterior maxillary protrusion, and strabismus).

  10. Analysis of cracks generated in the spinning-mandrel teeth

    Directory of Open Access Journals (Sweden)

    M. Haghshenas

    2014-10-01

    Full Text Available The spinning process, using a splined mandrel, is always prone to premature failure of the splined mandrels. Such a failure is thought to be related to the magnitude of the forming forces exerted on the mandrel by the forming rollers during the spinning process. In the present paper, the characteristic of corner cracks in the mandrel teeth (made of S7 tool steel of a spinning process has been investigated. The rotational speed of the mandrel is about 300 rpm during spinning process and the sheet metal (i.e. AISI 1020 is in contact with mandrel teeth to get the mandrel shape at the end of process. During this process, the mandrel teeth eventually break away. Fractography analyses using scanning electron microscopy (SEM clearly confirm “fatigue” as being the main reason for the failure.

  11. Overlay removable denture for treatment of worn teeth.

    Science.gov (United States)

    Beyth, Nurit; Tamari, Israel; Buller Sharon, Anat

    2014-01-01

    Rehabilitation of partially edentulous patients with excessively worn dentitions can be challenging. Factors including medical history as well as the cost of the treatment and patient wishes for simpler approaches must be considered. This manuscript describes the use of an overlay partial denture to treat patients with excessive wear of the maxillary teeth. We describe a technique to restore severely worn teeth using heat-cured acrylic as part of a partial or full denture. Minimal preparations of the teeth are required, and the restoration provides protection from further wear, and stabilizes the occlusion. This solution was functionally and esthetically suitable to the patients. The technique can be used in medically complex patients where extractions are contraindicated, such as post radiation therapy or bisphosphonate treatment.

  12. Mapping the structure, composition and mechanical properties of human teeth

    Energy Technology Data Exchange (ETDEWEB)

    Low, I.M. [Materials Research Group, Department of Applied Physics, Curtin University of Technology, Perth, WA 6845 (Australia)], E-mail: j.low@curtin.edu.au; Duraman, N.; Mahmood, U. [Materials Research Group, Department of Applied Physics, Curtin University of Technology, Perth, WA 6845 (Australia)

    2008-03-10

    The structure-property relationship in human adult and baby teeth was characterised by grazing-incidence synchrotron radiation diffraction, optical and atomic-force microscopy, in addition to Vickers indentation. Similarities and differences between both types of teeth have been highlighted and discussed. Depth-profiling results indicated the existence of contrasting but distinct gradual changes in crystal disorder, phase abundance, crystallite size and hardness within the baby and adult enamel, thus confirming the graded nature of human teeth. When compared to the adult tooth, the baby enamel is softer, more prone to fracture, but has larger hydroxyapatite grains. Vickers hardness of the enamel was load-dependent but load-independent in the dentine. The use of a 'bonded-interface' technique revealed the nature and evolution of deformation-microfracture damage around and beneath Vickers contacts.

  13. Múltiples dientes supernumerarios distomolares Multiple distomolars supernumerary teeth

    Directory of Open Access Journals (Sweden)

    F.J. Rodríguez Romero

    2009-12-01

    Full Text Available En una dentición normal, los dientes supernumerarios son aquellos descritos como adicionales a la serie. La etiología no esta clara. Se han descritos tanto en dentición primaria como en permanente, aunque son mas frecuentes en la dentición permanente. El objetivo de este informe es presentar un caso de una paciente con múltiples dientes supernumerarios distomolares. Cuartos molares bilaterales simétricos son sumamente raros.Supernumerary teeth are described as the teeth formed in excess of the number found in a normal dentition. The aetiology is not clear. Have been reported in both the primary and permanent dentition, although they are more prevalent in the permanent dentition. The purpose of this case report is to present a case of female patient with multiple distomolars supernumerary teeth. Bilateral symmetrical impacted fourth molars exceedingly uncommon.

  14. Optimizing the Esthetics of peg-shaped teeth

    Directory of Open Access Journals (Sweden)

    Fabia Danielle Sales da Cunha Medeiros e Silva

    2008-01-01

    Full Text Available In modern esthetic dentistry, recontouring peg-shaped teeth present the option of a technique for obtaining a harmonious smile. In thiscontext, the advancement of direct dental materials, such as resin composites and adhesive systems, allows this procedure to be performedsimply and efficiently, when compared with other available techniques. Thus, the aim of this report is to present a clinical case with an esthetic solution in peg-shaped lateral incisors (12 and 22. Initially, it was opted first to perform dental bleaching with a home bleaching gel (16% carbamide peroxide associated with an acetate mold duly made for this purpose. The peg-shaped teeth were recontoured with a microhybrid resin composite (shade EA1 and DA1 with the aid of a platinum guide in silicone, obtained after diagnostic waxing on the plaster model. It was concluded that the association of esthetic procedures is of the utmost importance for obtaining good looking, aligned and harmonious teeth.

  15. Dentinogenesis imperfecta type II: ultrastructure of teeth in sagittal sections.

    Science.gov (United States)

    Wieczorek, Aneta; Loster, Jolanta

    2013-01-01

    The morphological abnormalities of the teeth of patients affected by dentinogenesis imperfecta type 2 (DI-II) may underlie the difficulties with the clinical restoration of such teeth. We therefore performed a scanning electron microscopy (SEM) study of four permanent first mandibular molars of four DI-II patients with periapical pathosis. The teeth were prepared for SEM evaluation by standard methods. In the crown, the enamel presented a highly irregular surface with a number of cracks and crevices. In some places, only granular remains of the enamel were found, while in other parts of the crown, the enamel was absent. SEM examination revealed the structural changes responsible for the lower enamel's hardness and resistance to attrition, and for tooth wear, while the structural changes in the dentin may explain the failure of some adhesive restorative materials. This SEM study thus revealed structural defects which underlie the problems of attrition and restoration loss found in patients with this genetic dental condition.

  16. Rotary endodontics in primary teeth – A review

    Directory of Open Access Journals (Sweden)

    Sageena George

    2016-01-01

    Full Text Available Endodontic treatment in primary teeth can be challenging and time consuming, especially during canal preparation, which is considered one of the most important steps in root canal therapy. The conventional instrumentation technique for primary teeth remains the “gold-standard” over hand instrumentation, which makes procedures much more time consuming and adversely affects both clinicians and patients. Recently nickel–titanium (Ni–Ti rotary files have been developed for use in pediatric endodontics. Using rotary instruments for primary tooth pulpectomies is cost effective and results in fills that are consistently uniform and predictable. This article reviews the use of nickel–titanium rotary files as root canal instrumentation in primary teeth. The pulpectomy technique is described here according to different authors and the advantages and disadvantages of using rotary files are discussed.

  17. Fracture resistance of teeth restored with dentin-bonded crowns.

    Science.gov (United States)

    Burke, F J; Watts, D C

    1994-05-01

    While dentin-bonded crowns may hold esthetic advantages over metal-ceramic restorations, and minimal tooth preparation may also be appropriate, resistance to fracture of the restored unit is an important consideration. Dentin-bonded crowns were placed on standardized preparations in two groups of 10 maxillary premolar teeth in vitro. The preparations differed only in degree of taper. The restored specimens were subjected to compressive loading at 1 mm/min from a steel bar placed along the midline fissure. Mean fracture loads of 0.77 kN (6-degree taper) and 0.71 kN (8-degree taper) were recorded for the groups of prepared teeth, and a mean fracture load of 0.97 kN was obtained for a group of unprepared controls. Statistical analysis indicated that there was no significant difference between the fracture load of the 6-degree taper group and that of the sound control teeth.

  18. 'Triplication' defect in deciduous teeth: an unusual odontogenic anomaly.

    Science.gov (United States)

    Shanthraj, Srinivas L; Mallikarjun, Shanthala B; Kiran, Shital; Wilson, Bobby

    2015-01-01

    Developmental odontogenic anomalies can occur in primary as well as in permanent dentition leading to morphological variations in shape, size and structure and numerical variations such as hypodontia. The most commonly reported odontogenic anomaly in primary dentition is conjoined teeth. Conjoined teeth can be due to fusion or gemination. Relevant clinical and radiographic evaluation is a must to differentiate between the two. Occurrence of double fusion as an anomaly may not be infrequent, but triple fusion is a rare odontogenic anomaly. We report a case of a 7.5-year-old girl who clinically had a large crown due to triple fusion in her dentition, between two normal primary teeth and a supernumerary tooth. This paper gives a brief insight into the incidence, associated quandaries and diagnosis and treatment modalities of a triple fusion. PMID:25743857

  19. Anterior retropharyngeal approach to the cervical spine.

    OpenAIRE

    Behari S; Banerji D; Trivedi P; Jain V; Chhabra D

    2001-01-01

    The anterior retropharyngeal approach (ARPA) accesses anteriorly situated lesions from the clivus to C3, in patients with a short neck, Klippel Feil anomaly or those in whom the C2-3 and C3-4 disc spaces are situated higher in relation to the hyoid bone and the angle of mandible where it is difficult to approach this region using the conventional anterior approach, due to the superomedial obliquity of the trajectory. The ARPA avoids the potentially contaminated oropharyngeal cavity providing ...

  20. Quadriceps muscle contraction protects the anterior cruciate ligament during anterior tibial translation.

    Science.gov (United States)

    Aune, A K; Cawley, P W; Ekeland, A

    1997-01-01

    The proposed skiing injury mechanism that suggests a quadriceps muscle contraction can contribute to anterior cruciate ligament rupture was biomechanically investigated. The effect of quadriceps muscle force on a knee specimen loaded to anterior cruciate ligament failure during anterior tibial translation was studied in a human cadaveric model. In both knees from six donors, average age 41 years (range, 31 to 65), the joint capsule and ligaments, except the anterior cruciate ligament, were cut. The quadriceps tendon, patella, patellar tendon, and menisci were left intact. One knee from each pair was randomly selected to undergo destructive testing of the anterior cruciate ligament by anterior tibial translation at a displacement rate of 30 mm/sec with a simultaneously applied 889 N quadriceps muscle force. The knee flexion during testing was 30 degrees. As a control, the contralateral knee was loaded correspondingly, but only 5 N of quadriceps muscle force was applied. The ultimate load for the knee to anterior cruciate ligament failure when tested with 889 N quadriceps muscle force was 22% +/- 18% higher than that of knees tested with 5 N of force. The linear stiffness increased by 43% +/- 30%. These results did not support the speculation that a quadriceps muscle contraction contributes to anterior cruciate ligament failure. In this model, the quadriceps muscle force protected the anterior cruciate ligament from injury during anterior tibial translation.