Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 9.154
Filtrar
1.
Evid Based Dent ; 22(1): 36-37, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33772133

RESUMO

Objectives To examine whether periodontal injection of platelet-rich plasma (PRP) could accelerate orthodontic tooth movement.Methods A split-mouth randomised controlled clinical trial was conducted among 16 female participants. Canines were retracted on 0.017 x 0.025-inch stainless steel archwires through closed-coil springs attached on first molars with mini-screws for anchorage preservation. The intervention side received PRP + CaCl2 solution and the control side CaCl2 only. Intraligamental injections were performed during the canine retraction period every three weeks (zero, three and six weeks). The rate of canine retraction was assessed through superimposition of digital models every month for a total of four months. Assessment of associated pain was conducted by questionnaire.Results During the four-month period, a faster rate of canine retraction was detected on the intervention side only for the first month. Following cessation of PRP injections, the rate of canine retraction on the intervention side was initially slower than and then similar to that on the control side. An increase of pain was reported on both sides.Conclusions PRP could accelerate orthodontic tooth movement in the short term with no prolonged effects.


Assuntos
Plasma Rico em Plaquetas , Técnicas de Movimentação Dentária , Dente Canino , Feminino , Dente Molar , Aço Inoxidável
2.
Am J Orthod Dentofacial Orthop ; 159(3): 305-311, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33641814

RESUMO

INTRODUCTION: The early diagnosis and interception of potential maxillary canine impaction is the most desirable approach for correcting their path of eruption. However, there is still a lack of evidence regarding the effect of rapid maxillary expansion (RME) on labially impacted canines. This study aimed to investigate the age-related effect of RME on labially impacted maxillary canines in order to reduce the risk of their impaction in the mixed dentition and to examine the proper timing of interceptive treatment. METHODS: All patients aged 7-10 years were treated with an RME appliance using the same protocol. The distance to the occlusal plane, axis to the midline, and distribution in different sectors-depending on the patients' age-were evaluated for maxillary canines before and after treatment on panoramic radiographs in order to detect changes in the position of the impacted canines. These geometric measurements in the impacted canines were also validated by observing the nontreated canines at each age. RESULTS: Significant differences existed between the impacted canines and the erupted canines in all 3 categories in all age groups. RME treatment modulated the position of the impacted canines in all age groups. Interestingly, a statistically significant difference before and after RME in all categories was detected in patients aged <8 years. A discriminant analysis also showed a positive association of RME treatment with the risk of labially impacted canines. The standardized regression coefficients showed that the angulation of the maxillary canine was the most important predictor for impaction. CONCLUSIONS: Our findings indicate that RME treatment in the early mixed dentition was effective for managing labially impacted maxillary canines. An age of 7-8 years with early mixed dentition might be the most appropriate timing for therapeutic intervention on the basis of RME treatment for buccal canine impaction.


Assuntos
Técnica de Expansão Palatina , Dente Impactado , Estudos de Casos e Controles , Criança , Dente Canino/diagnóstico por imagem , Humanos , Maxila/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem , Dente Impactado/terapia
3.
Head Face Med ; 17(1): 1, 2021 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-33451343

RESUMO

BACKGROUND: The aim of the present study was to compare two different anchorage systems efficiency to disinclude impacted maxillary canines using as evaluation tool superimposed Cone Beam Computed Tomography (CBCTs). METHODS: The study has been conducted with two parallel groups with an allocation ratio of 1:1. Group test received treatment using as anchorage a miniscrew, control group was treated using an anchorage unit a trans palatal arch (TPA). Both groups received a calibrated traction force of 50 g. CBCT before treatment and 3 months after traction were superimposed and canine tip and root movement were evaluated in mm/month ratio. RESULTS: No differences were observed between groups for apex displacement, tip displacement and observation timespan. Twenty-two patients (12 female, 10 male, mean age:13.4 years) undergoing orthodontic treatment for impacted maxillary canines were recruited for this study. No differences were observed between groups for apex displacement, tip displacement and observation timespan. CONCLUSIONS: The present pilot study provided no evidence that indirect anchorage on miniscrews could make canine disimpaction faster than anchorage on a TPA. An apex root movement of 0.4-0.8 mm per month was found, while average canine tip movement ranged between 1.08 mm and 1.96 mm per month. No miniscrews failures were observed. TRIAL REGISTRATION: The study reports the preliminary results of the randomized clinical trial registered at www.register.clinicaltrials.gov (registration number: NCT01717417 ).


Assuntos
Dente Canino , Dente Impactado , Adolescente , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Masculino , Maxila/diagnóstico por imagem , Projetos Piloto , Dente Impactado/diagnóstico por imagem , Dente Impactado/cirurgia
4.
Am J Orthod Dentofacial Orthop ; 159(2): e135-e147, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33388201

RESUMO

INTRODUCTION: The purposes of this study were to characterize the 3-dimensional position of teeth adjacent to impacted canines and examine whether impaction affects canine development using cone-beam computed tomography. METHODS: Cone-beam computed tomography images of 34 unilateral maxillary impacted canines (12 males, 22 females; mean age, 16.5 years) were collected. Twenty-one canines were palatally impacted (PIC), and 13 were buccally impacted (BIC). Angular measurements of lateral incisors (LIs), first premolars, and the impacted canines positions relative to a 3-dimensional coordinate system and canines' volume, length, and shape of the roots, were compared between the affected and contralateral control sides. The influence of canine position and severity of impaction was examined. Statistics included the paired t test, Wilcoxon signed rank test, and McNemar test. RESULTS: In the PIC group, LIs showed significant mesiobuccal rotation (-17.1°), mesial angulation (8.4°), and buccal root torque (5°) and first premolars mesiobuccal rotation (6.1°). In the BIC group, LIs displayed mesiobuccal rotation (-18°) and significant palatal root torque (-5°). The canine volumes were similar in BICs and slightly smaller in PICs. The lengths were shorter in both, but root hooks were more prevalent in BICs. The severity of impaction affected the measured variables. CONCLUSIONS: The differential position of the adjacent teeth is pathognomonic for PIC vs BIC, and impaction seems to affect canine development. The findings provide evidence-based clinical and radiographical clues for early diagnosis of canine displacement and planning the most efficient treatment strategy. In addition, they support timely orthodontic eruption before the development of the apical third of the root.


Assuntos
Dente Canino , Dente Impactado , Adolescente , Dente Pré-Molar , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Incisivo , Masculino , Maxila/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem
5.
Am J Orthod Dentofacial Orthop ; 159(3): 360-372, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33485720

RESUMO

Tooth transposition is an uncommon disorder related to ectopic eruption; it can be classified as complete or incomplete on the basis of the position of the crowns and roots of transposed teeth. Aligning the transposed teeth to a normal sequence is always complex and challenging, especially in patients with complete transposition. The segmented archwire technique with cantilever or loops has been used in many transposition patients; however, it requires considerable laboratory work and is sometimes uncomfortable for the patient. In this case report, we present a novel orthodontic treatment for an 8-year-old boy with unilateral complete transposition of the maxillary central incisor and lateral incisor (Mx.I2.I1). During the alignment stage, the lateral incisor was moved palatally to bypass the central incisor, using a 0.012-in nickel-titanium wire continuously. Active orthodontic treatment was conducted for 44 months, and the final outcome was esthetically and functionally effective. Stable and satisfactory results were achieved within 4 years of follow-up.


Assuntos
Anormalidades Dentárias , Erupção Ectópica de Dente , Criança , Dente Canino , Humanos , Incisivo , Masculino , Maxila/diagnóstico por imagem , Maxila/cirurgia
6.
Am J Orthod Dentofacial Orthop ; 159(3): 258-270, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33495062

RESUMO

INTRODUCTION: The objective of this study was to evaluate the 3-dimensional changes in alveolar bone morphology after traction of buccally vs palatally unilateral maxillary impacted canines (MIC). METHODS: Following a split-mouth model, 27 cone-beam computed tomography images of unilaterally MIC (14 palatally and 13 buccally) and 27 contralateral unimpacted controls were obtained before and after traction using nickel-titanium closed-coil springs and a rigid anchorage appliance. Alveolar bone height and width were measured in the axial, coronal, and sagittal slides by 3 calibrated orthodontists, taking into account the impaction characteristics. A t test was used to compare the 2 groups, and a paired t test was applied for intragroup comparisons (both sides). A multiple linear regression model was used to evaluate the influence of the predictor variables on alveolar bone dimensional changes. RESULTS: The alveolar height showed a significantly greater decrease in palatally MIC (2.09 to 2.79 mm) than buccally MIC (0.28 to 0.57 mm) (P <0.05) for all surfaces. However, the alveolar width increased similarly in both groups up to 1.36 mm. In general, the affected side had a more significant height loss and greater increases in alveolar width than the nonaffected side. Regression analysis indicated that buccally MIC and age decreased alveolar changes, whereas female sex increased alveolar changes (P <0.05). CONCLUSIONS: MIC traction with nickel-titanium closed-coil springs and heavy anchorage induces significant 3-dimensional changes in alveolar bone characterized by alveolar bone height decreases and cervical alveolar bone width increases. The height decrease is greater in palatally than in buccally MIC.


Assuntos
Dente Impactado , Tração , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Incisivo , Maxila/diagnóstico por imagem , Estudos Retrospectivos , Dente Impactado/diagnóstico por imagem
7.
Am J Orthod Dentofacial Orthop ; 159(3): e233-e243, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33487497

RESUMO

INTRODUCTION: This study aimed to compare the extent of buccal bone defects (dehiscences and fenestrations) and transversal tooth movement of mandibular lateral segments in patients after orthodontic treatment with and without piezocision in cone-beam computed tomography and digital dental models. METHODS: The study sample of this study consisted of cone-beam computed tomography scans and digital dental models taken before (T0) and after (T1) orthodontic treatment of 36 patients with moderate mandibular anterior crowding. The experimental group consisted of 17 patients that had piezocision performed at the beginning of treatment with the goal of accelerating tooth movement, which was compared with 19 patients who did not receive piezocision. The measurement of bone defects, buccolingual inclination, and transversal distances of the tooth in the mandibular lateral segments (mandibular canines, premolars, and first molars) were evaluated at baseline and at the end of the orthodontic treatment. RESULTS: Overall, an increase in dehiscences, buccal inclination, and arch width from T0 to T1 was observed in both groups, but no statistically significant difference was found between groups. A significant increase in fenestrations from T0 to T1 was observed only for the canines in the experimental group. No statistically significant association was found between the increase of dehiscences and the amount of buccolingual inclination or transversal width changes. However, the changes in transversal width were statistically significantly associated with the increase in buccal inclination at the canines, first and second premolars. CONCLUSIONS: No significant differences were found in buccal dehiscences and transversal tooth movement (buccolingual inclination and arch width) of mandibular lateral segments between patients after orthodontic treatment with and without piezocision. Dehiscences, buccal inclination, and arch width significantly increased from T0 to T1 in both groups.


Assuntos
Mandíbula , Técnicas de Movimentação Dentária , Estudos de Casos e Controles , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Humanos , Mandíbula/diagnóstico por imagem , Mandíbula/cirurgia , Estudos Retrospectivos
8.
Angle Orthod ; 91(2): 213-219, 2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33347530

RESUMO

OBJECTIVE: To investigate the efficiency of platelet-rich fibrin (PRF) injection on maxillary incisor retraction rate. MATERIALS AND METHODS: The study included 40 patients (23 women and 17 men; mean age; 20.7 ± 1.45) with Class II Division 1 malocclusion. The treatment plan for all patients was extraction of the maxillary first premolars and canine distalization, followed by retraction of the maxillary incisors. Patients were randomly divided into two groups. The study group received injectable platelet-rich fibrin (i-PRF) two times with an interval of 2 weeks; the control group did not receive i-PRF. In both groups, the measurements were bilaterally assessed as the distances between the lateral and canine teeth on the plaster models at five time points. The rate of incisor movement was evaluated by Student's t-test, analysis of variance, and Tukey honestly significant difference tests. Statistical significance was set as P < .05. RESULTS: The average movements of incisors were significantly higher in the study group than the control group at all time points (P < .05). According to the within-group comparison, none of the measurements showed any significant differences between the right and left sides in both groups at all time points (P > .05). While the movement of incisors was significantly higher in the study group in the week following the PRF injection compared to the other weeks (P < .05), there were no significant differences in the control group at all-time points (P > .05). CONCLUSIONS: Applying i-PRF significantly increased the rate of maxillary incisor retraction at all time intervals. Platelet-rich fibrin injection can be an effective method for shortening treatment duration.


Assuntos
Má Oclusão de Angle Classe II , Fibrina Rica em Plaquetas , Adulto , Dente Canino , Feminino , Humanos , Incisivo , Masculino , Maxila , Adulto Jovem
9.
Am J Orthod Dentofacial Orthop ; 159(2): 167-174, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33342674

RESUMO

INTRODUCTION: This research aimed to analyze the prevalence of root dilaceration in buccally impacted canines (BICs) and palatally impacted canines (PICs) with their adjacent teeth based on a retrospective cone-beam computed tomography (CBCT) investigation. METHODS: Pretreatment CBCT images of 145 subjects with unilateral maxillary canine impaction and 145 age- and sex-matched subjects without impaction were used. Prevalence of dilaceration (subclassified to root curvature and apical hook based on severity) in canines and adjacent teeth was determined in CBCT records. The root length of maxillary impacted canines was measured for further morphologic evaluations. RESULTS: Impacted canines had a significantly higher prevalence of root dilaceration than the control group and compared with the erupted contralateral canines in the experimental group (P < 0.001 for both). A significantly higher prevalence of root dilaceration was found in adjacent lateral incisors of the PICs subgroup than that of the control group (P < 0.001). Adjacent premolars had a higher prevalence of dilacerated roots in the PICs subgroup (P < 0.001) than the control group, but not for the BICs subgroup. Significantly higher prevalence of curvature (P < 0.001 for both) and hook (P = 0.008 and P < 0.001, respectively) were found in BICs and PICs roots compared with the control group. Both types of impacted canines had significantly shorter roots than the control group (P < 0.001 for both). CONCLUSIONS: BICs and PICs have a higher tendency to present root dilaceration and shorter roots. Unlike BICs, adjacent teeth to PICs were more frequently observed to have root dilaceration.


Assuntos
Dente Canino , Dente Impactado , Dente Pré-Molar , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Humanos , Incisivo , Maxila/diagnóstico por imagem , Estudos Retrospectivos , Dente Impactado/diagnóstico por imagem
10.
Angle Orthod ; 90(3): 457-466, 2020 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378438

RESUMO

Maxillary canine and first premolar transposition is a complicated dental anomaly to treat, especially if the clinician's goal is to orthodontically move the canine into its normal position. Early diagnosis with cone-beam computed tomography simplifies the treatment of this pathology. This case report describes a patient with bilateral transposition, one complete and the other incomplete, involving the maxillary canine and the first premolar (Mx.C.1P). The orthodontic treatment involved the correction of both transpositions. In the complete transposition, the traction was mesial and upward to move the canine into a more apical position with a wider dentoalveolar process for easier crown interchange.


Assuntos
Erupção Ectópica de Dente , Dente Pré-Molar/diagnóstico por imagem , Dente Pré-Molar/cirurgia , Tomografia Computadorizada de Feixe Cônico , Dente Canino/diagnóstico por imagem , Humanos , Maxila/diagnóstico por imagem , Erupção Ectópica de Dente/diagnóstico por imagem , Erupção Ectópica de Dente/terapia
11.
Angle Orthod ; 90(6): 873-880, 2020 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378512

RESUMO

Transposition of maxillary teeth is an eruptive disturbance occurring in approximately 1 of every 300 orthodontic patients. Such cases are frequently very challenging in terms of treatment planning and orthodontic management. The canine is one of the most commonly transposed teeth, ectopically positioned with either the lateral incisor or the first premolar. This case report illustrates unique orthodontic treatment, describes treatment procedures, and presents the final outcome of bilateral maxillary canine-lateral incisor complete transpositions in which the involved teeth were moved to their clinically normal position in the dental arch without extracting premolars.


Assuntos
Erupção Ectópica de Dente , Dente Pré-Molar , Dente Canino/diagnóstico por imagem , Humanos , Incisivo , Maxila/diagnóstico por imagem , Erupção Ectópica de Dente/diagnóstico por imagem , Erupção Ectópica de Dente/terapia
12.
Angle Orthod ; 90(6): 801-810, 2020 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378514

RESUMO

OBJECTIVES: To assess the mechanical environment for three fixed appliances designed to retract the lower anterior segment. MATERIALS AND METHODS: A cone-beam computed tomography scan provided three-dimensional morphology to construct finite element models for three common methods of lower anterior retraction into first premolar extraction spaces: (1) canine retraction with a T-loop, (2) en-masse space closure with the power-arm on the canine bracket (PAB), and (3) power-arm directly attached to the archwire mesial to the canine (PAW). Half of the symmetric mandibular arch was modeled as a linear, isotropic composite material containing five teeth: central incisors (L1), lateral incisor (L2), canine (L3), second premolar (L4), and first molar (L5). Bonded brackets had 0.022-in slots. Archwire and power-arm components were 0.016 × 0.022 in. An initial retraction force of 125 cN was used for all three appliances. Displacements were calculated. Periodontal ligament (PDL) stresses and distributions were calculated for four invariants: maximum principal, minimum principal, von Mises, and dilatational stresses. RESULTS: The PDL stress distributions for the four invariants corresponded to the displacement patterns for each appliance. T-loop tipped the canine(s) and incisors distally. PAB rotated L3 distal in, intruded L2, and extruded L1. PAW distorted the archwire resulting in L3 extrusion as well as lingual tipping of L1 and L2. Maximum stress levels in the PDL were up to 5× greater for the PAW than the T-loop and PAB methods. CONCLUSIONS: T-loop of this type is more predictable because power-arms can have rotational and archwire distortion effects that result in undesirable paths of tooth movement.


Assuntos
Incisivo , Técnicas de Movimentação Dentária , Dente Pré-Molar , Fenômenos Biomecânicos , Dente Canino/diagnóstico por imagem , Análise de Elementos Finitos , Fios Ortodônticos , Estresse Mecânico
13.
Angle Orthod ; 90(6): 751-757, 2020 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378508

RESUMO

OBJECTIVES: To compare the impact of primary canine and primary first molar extractions with extractions of only the primary canine regarding correction of palatally displaced canines (PDCs). MATERIALS AND METHODS: Thirty-two children aged 9.5-13.5 years with 48 PDCs were randomly allocated to either the double-extraction group (DEG) or single-extraction group (SEG). Clinical and radiographic examinations were performed at baseline and at 6-month intervals until the canine emerged or orthodontic treatment was started. Outcome measures were: emergence of maxillary canine (yes/no), emergence of maxillary canine into a favorable position (yes/no), and maxillary canine positional change (angulation and sector). Factors influencing PDC emergence were analyzed using logistic regression. RESULTS: In the DEG, 64% (16/25) of canines emerged into the oral cavity vs 78% (18/23) in the SEG (P = .283). Favorable PDC position at trial end was seen in 64% (16/25) of the DEG vs 57% (13/23) of the SEG (P = .600). Significant distal movement of PDCs was recorded in the DEG and SEG, though no significant difference was observed between groups. Significant predictors of canine emergence were initial canine angulation (Angle A) (P = .008) and space conditions at T0 (P = .030). CONCLUSIONS: Double or single primary tooth extraction procedures are equivalent in supporting PDC eruption into the oral cavity and into a favorable position in the dental arch. Initial canine angulation and space assessments may be used as predictors of successful PDC eruption.


Assuntos
Erupção Ectópica de Dente , Dente Impactado , Adolescente , Criança , Dente Canino/diagnóstico por imagem , Dente Canino/cirurgia , Humanos , Maxila/diagnóstico por imagem , Maxila/cirurgia , Ortodontia Interceptora , Erupção Ectópica de Dente/diagnóstico por imagem , Erupção Ectópica de Dente/terapia , Extração Dentária , Dente Decíduo , Dente Impactado/diagnóstico por imagem , Dente Impactado/cirurgia , Resultado do Tratamento
14.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(6): 1130-1134, 2020 Dec 18.
Artigo em Chinês | MEDLINE | ID: mdl-33331326

RESUMO

OBJECTIVE: To analyze the esthetic proportions of maxillary anterior teeth in term of the apparent widths proportion of the adjacent teeth and width/height ratio of the clinical crown in 120 Chinese adults. METHODS: Maxillary gypsum casts were obtained from the dental laboratories of stomatological hospitals in North China, Southeast China, and Southwest China, according to the inclusion criteria and exclusion criteria. Standardized digital photographs of each cast were recorded. The apparent widths and actual widths and heights of the central incisors, lateral incisors and canines were determined by ImageJ software for the calculation of apparent widths proportion of the adjacent teeth and width/height ratio of the clinical crown. The ideal apparent widths proportion (Golden proportion and Preston proportion) and width/height ratio (0.80) were tested. The gender, arch side, and regional differences were investigated. RESULTS: The apparent widths proportion of the lateral/central incisor was 0.724±0.047, of the canine/lateral incisor was 0.814±0.092. The width/height ratio of the central incisor was 0.848±0.072, of the lateral incisor was 0.834±0.094, of the canine was 0.883±0.098. The esthetic proportions were different from the predicted ideal ratio (P < 0.001). The apparent widths proportion of lateral/central incisor was significantly larger in the right side than that in the left side (0.730± 0.044 vs. 0.718±0.050), and was significantly smaller in North China than that in Southwest China (0.711±0.051 vs. 0.731±0.044). The width/height ratio of the central incisor was significantly larger in the female than that in the male (0.855±0.074 vs. 0.835±0.068), and in the right side than that in the left side (0.855±0.073 vs. 0.842±0.072). The width/height ratio of the lateral incisor was significantly larger in the female than that in the male (0.843±0.097 vs. 0.817±0.084). CONCLUSION: The apparent widths proportion of adjacent teeth and the width/height ratio of the clinical crown in Chinese adults are different from the foreigner's. The esthetic proportion parameters have significant population specificity, and the measurements cannot be generalized as well as it should be applied with caution.


Assuntos
Dente Canino , Coroa do Dente , Adulto , Grupo com Ancestrais do Continente Asiático , China , Estética , Estética Dentária , Feminino , Humanos , Masculino , Maxila/anatomia & histologia , Odontometria , Coroa do Dente/anatomia & histologia
15.
J Clin Pediatr Dent ; 44(4): 268-273, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-33167020

RESUMO

Tooth transposition is a relatively rare dental anomaly of interchange in position of two adjacent teeth. AIM: To determine the prevalence and distribution of canine transposition in a sample of orthodontic patients and present treatment alternatives and outcome. STUDY DESIGN: The records of 3000 consecutively treated orthodontic patients from a university clinic were surveyed to detect canine transposition in both dental arches. The data was recorded according to gender, age, number and location. RESULTS: Canine transpositions were detected in 15 subjects, 3 (20%) males and 12 (80%) females presenting a prevalence of 0.5%. Of them, 6 were between the maxillary canine and first premolar, 7 between the maxillary canine and lateral incisor, 2 transpositions were between the mandibular canine and the lateral incisor. A female to male ratio of 4:1 with left side predominance was found. Treatment options include extracting the transposed teeth, maintaining them in their transposed position, or repositioning them in their normal place within the dental arch. CONCLUSION: The prevalence of canine transposition in the present sample was found to be 0.5% with a greater frequency in the maxilla. Treatment options include extraction of one of the transposed teeth, alignment of the teeth in their transposed position or correction of the anomaly. The latter gives the best esthetic outcome.


Assuntos
Erupção Ectópica de Dente , Dente Canino , Estética Dentária , Feminino , Humanos , Incisivo , Masculino , Maxila , Prevalência , Erupção Ectópica de Dente/epidemiologia , Erupção Ectópica de Dente/terapia
16.
Gerodontology ; 37(4): 411-415, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33179813

RESUMO

OBJECTIVE: This report discusses the clinical relevance of a novel case of an odontoma and transmigrated canine in the setting of florid cemento-osseous dysplasia (COD), hypercementosis and moderate to severe periodontitis in a 66-year-old patient. BACKGROUND: An odontoma may infrequently impede tooth eruption and rarely has been implicated with canine transmigration. COD is a benign fibro-osseous lesion associated with decreased vascularity and poorer surgical intervention. MATERIALS AND METHODS: A partially edentulous woman, in no acute distress, underwent clinical and radiographic evaluation in pursuit of comprehensive dental care. RESULTS: Radiographic assessment demonstrated multiple occult pathologies of the mandible, including compound odontoma, canine transmigration, florid COD, hypercementosis and moderate to severe periodontitis, a concurrence thought to be previously unreported. Furthermore, the presence of the odontoma and transmigrated canine is apparently the second reported case in the geriatric population. CONCLUSIONS: The attending clinician should carefully weigh removal of an impacted and transmigrated canine associated with an odontoma in the setting of COD and compromised bone, particularly in older individuals. When surgical intervention is deferred in these clinical situations, patients should continue to be monitored for clinical and radiographic development of pathologic processes.


Assuntos
Displasia Fibrosa Óssea , Odontoma , Dente Impactado , Idoso , Dente Canino/diagnóstico por imagem , Feminino , Humanos , Mandíbula , Odontoma/complicações , Odontoma/diagnóstico por imagem , Odontoma/cirurgia , Dente Impactado/diagnóstico por imagem , Dente Impactado/cirurgia
17.
Eur. j. anat ; 24(6): 485-490, nov. 2020. tab, ilus
Artigo em Inglês | IBECS | ID: ibc-198389

RESUMO

The gubernacular canal or gubernacular tract is filled by the gubernacular cord, which includes fibrous connective tissue containing peripheral nerves, blood and lymphatic ducts besides the epithelial cells from the fragmented dental laminae, including epithelial growth factor. The purpose of this study was to evaluate the gubernacular tract in unerupted supernumerary teeth by cone beam computed tomography. Sixty-four unerupted supernumerary teeth were selected from 44 patients (21 females, 23 males, 12-68 years). Gubernacular tract characteristics were evaluated in five different groups: No alteration, bending of gubernacular tract, contraction of gubernacular tract, obliterations of gubernacular tract, difference between erupted direction. Unerupted supernumerary teeth were classified according to their position. The presence and characteristics of the gubernacular tract in the supernumerary teeth were evaluated by cone beam computed tomography. In our study, the frequency of the gubernacular tract was found to be 31.7%. There was no significant difference between the presence of gubernacular tract and gender, age and gubernacular tract characteristics. It was found that gubernacular tract characteristics did not change according to gender, quadrant, age and unerupted positions. Cone beam computed tomography is an efficient method for the evaluation of the gubernacular tract in unerupted supernumerary teeth. Conducting these studies in larger populations will provide more detailed information about the prognosis of impacted supernumerary teeth


No disponible


Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Dente Supranumerário/diagnóstico por imagem , Dente Impactado/diagnóstico por imagem , Tomografia Computadorizada de Feixe Cônico/métodos , Dente Canino/anatomia & histologia , Estudos Retrospectivos , Germe de Dente/diagnóstico por imagem
18.
Am J Orthod Dentofacial Orthop ; 158(4): e29-e36, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32988572

RESUMO

INTRODUCTION: The primary objective of this study was to compare the aesthetic outcome of palatally impacted canines treated with an open or closed surgical exposure technique using the Maxillary Canine Aesthetic Index (MCAI) at least 1 year after debonding. Secondary objectives were set on the periodontal outcome, tooth color, pulpal status, and self-reported contentment. METHODS: The sample of this retrospective study consisted of 53 patients with an average age of 20 years and 7 months at the time of the investigation. A total of 53 canines were investigated. All canines were aesthetically scored with the MCAI. Other outcome variables were investigated, such as gingival inflammation, pocket probing depth, vitality, percussion sensitivity, and tooth color. All patients received a questionnaire to evaluate their appraisal of different parameters. RESULTS: A statistically significant difference (P < 0.001) was found between the groups treated with an open and closed technique in terms of the MCAI. The closed technique scored excellent in terms of aesthetics, whereas the open technique scored good. The closed technique had more discoloration (P < 0.001) and a delayed response to the cold test (P = 0.021). In general, patients were satisfied with both techniques but considered the treatment time to be very long. CONCLUSIONS: A closed surgical exposure of palatally impacted maxillary canines is preferred in terms of aesthetics when measured with the MCAI. There was no difference between the 2 techniques in terms of periodontal outcome. Canines treated with a closed exposure tended to have a darker color and delayed response to cold testing.


Assuntos
Dente Canino/diagnóstico por imagem , Dente Canino/cirurgia , Dente Impactado/diagnóstico por imagem , Dente Impactado/cirurgia , Adulto , Estética , Seguimentos , Humanos , Estudos Retrospectivos , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...