Resumo Introdução A movimentação ortodôntica pode causar sintomatologia dolorosa, principalmente nas fases iniciais do tratamento. Objetivo Este estudo teve como objetivo comparar o desempenho da goma de mascar e do ibuprofeno no controle da dor durante o período inicial do tratamento ortodôntico. Material e método Foi desenvolvido um ensaio clínico randomizado cego, com razão de alocação de 1:1, com pacientes com idade ≥18 anos. O tamanho da amostra foi estabelecido considerando um nível de significância de 5% e poder do teste de 80%, resultando em um mínimo de 30 voluntários por grupo (n=90). Os participantes foram pareados quanto ao sexo, idade, gravidade da má oclusão, definida pelo Componente de Saúde Bucal (DHC) do Índice de Necessidade de Tratamento Ortodôntico (IOTN), e apinhamento, determinado pelo índice de irregularidade de Little. A amostra foi distribuída aleatoriamente em três grupos: Grupo I (controle) placebo; Goma de mascar Grupo II; e Grupo III Ibuprofeno. A percepção da dor foi avaliada pela Escala Visual Analógica (EVA) nas primeiras 24, 36 e 48 horas após a ativação do aparelho ortodôntico. Os dados foram analisados por modelos lineares generalizados para medidas repetidas no tempo. Resultado Não foi observada diferença estatisticamente significativa (p>0.05) entre os grupos para os métodos de terapia da dor avaliados em 24, 36 e 48 horas pós-ativação. Conclusão: Não houve diferença entre o método utilizado para controle da dor durante o tratamento ortodôntico.

Abstract Introduction Orthodontic movement can cause painful symptoms, especially in the early stages of treatment. Objective This study aimed to compare the performance of chewing gum and ibuprofen in pain control during the initial period of orthodontic treatment. Material and method A randomized blind clinical trial, with an allocation ratio of 1:1, was developed with patients aged ≥18 years old. The sample size was established considering a significance level of 5% and test power of 80%, resulting in a minimum of 30 volunteers per group (n=90). Participants were paired regarding sex, age, the severity of malocclusion, defined by the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN), and crowding, determined by Little’s irregularity index. The sample was randomly allocated to three groups: Group I (control) placebo; Group II chewing gum; and Group III Ibuprofen. Pain perception was evaluated by the Visual Analog Scale (VAS) in the first 24, 36, and 48 hours after activation of the orthodontic appliance. The data were analyzed by generalized linear models for repeated measures in time. Result No statistically significant difference (p>0.05) was observed among the groups for the methods of pain therapy evaluated in 24, 36, and 48 hours post-activation. Conclusion There was no difference among the method used for pain control during the orthodontic treatment.

Resumo O objetivo deste estudo foi avaliar o impacto da severidade da má oclusão na qualidade de vida relacionada à saúde bucal (OHRQoL) de adolescentes não brancos. Estudo transversal foi realizado com 585 adolescentes brasileiros não brancos (12-15 anos). O Índice de Estética Dental (DAI) foi utilizado para a avaliação clínica da má oclusão e o Oral Health Impact Profile (OHIP-14) na OHRQoL. A sobremordida profunda e as relações oclusais transversais foram avaliadas em associação com o DAI. Os adolescentes com DAI 3 e 4 foram divididos em 4 grupos: G1 - indivíduos com relação transversal normal ou com ausência de sobremordida; G2 - indivíduos com mordida cruzada posterior; G3 - indivíduos com sobremordida profunda; e, G4 - indivíduos com mordida em Brodie. O modelo final estimou as variáveis selecionadas após o ajuste para aquelas que permaneceram no modelo multivariado em níveis iguais e superiores. A partir das análises de regressão logística, os odds ratios foram ajustados e estimados com os respectivos intervalos de confiança de 95%. Os adolescentes com má oclusão severa divididos em G2, G3 e G4 mostraram um p-valor de 0.0501, 0.1475, e 0.5407, respectivamente, mas não permaneceram no modelo final. A severidade da má oclusão não teve impacto na OHRQoL de adolescentes não brancos.

Abstract The aim of this study was to evaluate the impact of malocclusion severity on the oral health-related quality of life (OHRQoL) of non-white adolescents. A cross-sectional study was conducted with 585 non-white Brazilian adolescents (12-15 years). The Dental Aesthetic Index (DAI) was used for the clinical assessment of malocclusion and Oral Health Impact Profile (OHIP-14) on OHRQoL. Deep bite and transverse occlusal relationships were assessed in association with the DAI. The adolescents with DAI 3 and 4 were distributed into 4 groups: G1 - individuals without transverse occlusal relationships or deep bite; G2 - individuals with only posterior crossbite; G3 - individuals with only deep bite; and G4 - individuals with Brodie bite. The backward stepwise procedure was used to select variables on each level, eliminating variables with a p≤0.20. From the logistic regression analyses, the adjusted odds ratios were estimated with the respective 95% confidence intervals. The adolescents with severe malocclusion divided into the G2, G3 and G4 showed p-value of 0.0501, 0.1475, and 0.5407, respectively, but did not remain in the final model. Malocclusion severity had no impact on the OHRQoL of non-white adolescents.

Resumo O objetivo deste estudo foi avaliar o impacto da severidade da má oclusão na qualidade de vida relacionada à saúde bucal (OHRQoL) de adolescentes não brancos. Estudo transversal foi realizado com 585 adolescentes brasileiros não brancos (12-15 anos). O Índice de Estética Dental (DAI) foi utilizado para a avaliação clínica da má oclusão e o Oral Health Impact Profile (OHIP-14) na OHRQoL. A sobremordida profunda e as relações oclusais transversais foram avaliadas em associação com o DAI. Os adolescentes com DAI 3 e 4 foram divididos em 4 grupos: G1 - indivíduos com relação transversal normal ou com ausência de sobremordida; G2 - indivíduos com mordida cruzada posterior; G3 - indivíduos com sobremordida profunda; e, G4 - indivíduos com mordida em Brodie. O modelo final estimou as variáveis selecionadas após o ajuste para aquelas que permaneceram no modelo multivariado em níveis iguais e superiores. A partir das análises de regressão logística, os odds ratios foram ajustados e estimados com os respectivos intervalos de confiança de 95%. Os adolescentes com má oclusão severa divididos em G2, G3 e G4 mostraram um p-valor de 0.0501, 0.1475, e 0.5407, respectivamente, mas não permaneceram no modelo final. A severidade da má oclusão não teve impacto na OHRQoL de adolescentes não brancos.

Abstract The aim of this study was to evaluate the impact of malocclusion severity on the oral health-related quality of life (OHRQoL) of non-white adolescents. A cross-sectional study was conducted with 585 non-white Brazilian adolescents (12-15 years). The Dental Aesthetic Index (DAI) was used for the clinical assessment of malocclusion and Oral Health Impact Profile (OHIP-14) on OHRQoL. Deep bite and transverse occlusal relationships were assessed in association with the DAI. The adolescents with DAI 3 and 4 were distributed into 4 groups: G1 - individuals without transverse occlusal relationships or deep bite; G2 - individuals with only posterior crossbite; G3 - individuals with only deep bite; and G4 - individuals with Brodie bite. The backward stepwise procedure was used to select variables on each level, eliminating variables with a p≤0.20. From the logistic regression analyses, the adjusted odds ratios were estimated with the respective 95% confidence intervals. The adolescents with severe malocclusion divided into the G2, G3 and G4 showed p-value of 0.0501, 0.1475, and 0.5407, respectively, but did not remain in the final model. Malocclusion severity had no impact on the OHRQoL of non-white adolescents.

Crown dilaceration of permanent teeth occurs due to the non-axial displacement of the already formed hard tissue portion of the developing crown at an angle to their longitudinal axis due to trauma to the primary predecessors. This is a rare condition, representing only 3% of the total of injuries to developing teeth and usually occurs in permanent maxillary incisors because of the close proximity of their tooth germs to the primary incisors, which are more susceptible to trauma. This alteration frequently results from the intrusion of a primary tooth when the child is around 2 years of age, at which time half of the crown of the permanent successor is already formed. Teeth with dilacerated crowns may either erupt with buccal or lingual displacement or remain impacted. The treatment may involve endodontic, orthodontic, restorative and prosthetic procedures. This paper reports the restorative treatment proposed to reestablish the esthetics and function of the affected teeth in three cases of crown dilaceration in permanent maxillary incisors after trauma to their primary predecessors.

This study is a histomorphometrical analysis of the influence of the bisphosphonate alendronate on alveolar bone density. Eighteen male Wistar rats were randomly assigned to a control group (n = 9) that received no medication and an experimental group (n = 9) that received oral alendronate (1 mg/kg) from birth until euthanization at 3 months of age. Semi-serial 4-µm-thick transverse sections were obtained from the region between the roots of the left maxillary first molar, stained with hematoxylin and eosin, and examined with a Zeiss Axioskop II optical microscope for histomorphometric analysis. The images were captured with a digital camera coupled with the microscope and connected to a computer, and were analyzed using Image J 1.34s image-analysis software. A 1,200-point grid was positioned onto each digitized image. The number of intersection points of grid lines in the bone tissue was counted. The ratio between the number of points in the bone tissue and the total number of points of the grid (1,200) was used to determine the bone density of the analyzed tissue. Data from the control and experimental groups were compared and analyzed statistically by the Student's t-test (p = 0.05). There was no statistically significant difference (p = 0.3754) in the alveolar bone density between the control and alendronate-treated animals. It may be concluded that the bisphosphonate alendronate did not alter the morphology of the alveolar bone, maintaining its structural tissue characteristics in healthy animals.

In order to microscopically analyze the pulpal effects of orthodontic movement, 49 maxillary first molars of rats were submitted to orthodontic appliance composed of a closed coil spring anchored to the maxillary incisors, placed for the achievement of mesial movement. MATERIAL AND METHODS: Ten animals were used as the control group and were not submitted to orthodontic force; the other animals were divided into groups according to the study period of tooth movement, namely 1, 2, 3, 4, 5, 6 and 7 days. The investigation of pulp and periodontal changes included hyalinization, fibrosis, reactive dentin and vascular congestion. Statistical evaluation was performed between control and experimental groups and between periods of observation using non-parametric chi-square, Kruskal-Wallis and Dunn tests. RESULTS: There was no statistically significant difference concerning pulpal changes between control and experimental groups nor between periods of observation. The control group, at 3 and 5 days, revealed greater hyalinization of the periodontal ligament (p<0.05), whereas root resorption was significantly greater at 5 and 7 days (p<0.05). CONCLUSION: No morphological change from the effect of induced tooth movement could be found in the dentin-pulp complex. In addition, no inflammatory or pulp degeneration, detectable in optical microscopy, was found in experimental groups.

Foi objetivo do presente estudo investigar a distribuição atual dos vários tipos de fissuras entre pacientes que compareceram ao Hospital de Reabilitação de Anomalias Craniofaciais (HRAC-USP), Bauru, Brasil, pela primeira vez, no ano de 2000. No total, 803 pacientes não operados com fissura de lábio e/ou palato, com ou sem malformações adicionais, sem síndromes reconhecíveis, compareceram ao HRAC-USP para inscrição para tratamento durante o ano de 2000. Foi observada predominância de fissura completa de lábio e palato, unilateral ou bilateral (37,1%), seguida pela fissura de palato isolada (31,7%) e fissura de lábio isolada (28,4%). Foi notada uma relação discreta entre a fissura de palato e o gênero feminino (53%), sendo o gênero masculino mais afetado pelos outros tipos de fissuras (cerca de 60%). Os achados revelaram uma predominância de fissuras completas do palato primário e secundário, cujo tratamento é mais complexo, e uma maior ocorrência no gênero masculino.

This study aimed at investigating the current distribution of the several types of clefts among the patients receiving treatment at the Hospital for Rehabilitation of Craniofacial Anomalies (HRAC-USP), Bauru, Brazil, for the first time during the year 2000. A total of 803 unoperated patients with cleft lip and/or palate, with or without additional malformations, with no recognizable syndromes, who came to the HRAC-USP for enrollment for treatment during the year 2000. A predominance of complete cleft lip and palate, either unilateral or bilateral, was observed (37.1%), followed by isolated cleft palate (31.7%) and isolated cleft lip (28.4%). A discrete relationship between cleft palate and the female gender was noticed (53%), and males were more affected by the other types of clefts (around 60%). The findings revealed a predominance of complete clefts of the primary and secondary palate, the treatment of which is more complex, and whose frequency is greater in males.