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This study aimed to evaluate the relationship between aesthetic concern and self-esteem in adolescents with severe malocclusion.A cross-sectional study developed with 543 adolescents from 11 to 13 years of age and severe malocclusion was selected. Dental aesthetic index (DAI) diagnosed the malocclusion and selected the groups with greater severity (DAI 3 and 4). Aesthetic concern was assessed using the oral aesthetic subjective impact scale (OASIS) and considered an outcome variable. The global negative self-evaluation (GSE) evaluated self-esteem. The variables were analysed using Poisson multiple regression and the model adjustment determined by the Akaike information criterion (AICC). The effect of each variable on OASIS was expressed as a prevalence ratio (PR) with 95% confidence intervals. The analyses were performed using the R program with a significance level of 5%.A significant association was observed between aesthetic concern scores and self-esteem (Self-esteem modulates how the individual perceives malocclusion. Adolescents with severe and very malocclusion and low self-esteem have greater aesthetic concerns.

OBJETIVO: O presente estudo apresenta um aspecto clínico relevante quanto à frequência das consultas durante o tratamento ortodôntico e de acompanhamento no período pós-tratamento, correlacionando-a com a recidiva da má oclusão. MÉTODOS: Estudo transversal realizado com 404 ortodontistas que responderam a um questionário eletrônico estruturado com questões relacionadas ao tratamento ortodôntico, tipos de aparelho de contenção, tempo de uso, recidivas e formas de retratamento. Os dados foram analisados, inicialmente, por meio de tabelas de distribuição de frequências e por análises de regressão logística simples e múltipla, com nível de significância de 5%. RESULTADOS: Profissionais que acompanham seus pacientes em períodos maiores que anualmente, ou que não os acompanham, têm 2,13 vezes (IC 95%: 1,22-3,71) mais chances de utilizar aparelhos de contenção fixos em caso de recidiva (p = 0,0097). Profissionais que tratam da mesma forma os próprios pacientes e os pacientes encaminhados têm mais chances (OR: 1,73; IC 95%: 1,14-2,62) de utilizar aparelhos de contenção fixos em caso de recidiva (p = 0,0097). Houve associação significativa entre o tempo que o profissional identifica o aparecimento das recidivas após a finalização do tratamento e a frequência com que ele acompanha o paciente no período pós-tratamento, sendo a recidiva detectada já no primeiro ano para 52,5% dos ortodontistas (p < 0,05). A maioria dos ortodontistas (93,1%) concordou que os aparelhos de contenção removíveis são mais suscetíveis a recidivas (p < 0,05). CONCLUSÃO: A maioria dos ortodontistas recomenda o uso de contenção em tempo integral para o resto da vida dos pacientes e realiza acompanhamento anual após o tratamento.

Este estudo in vitro teve como objetivo avaliar a força liberada por elásticos ortodônticos coloridos e naturais e a degradação da força ao longo de 24 horas. No total foram utilizados 40 elásticos com força leve, divididos em quatro Grupos (n = 10) de acordo com o diâmetro (1/4 pol. e 3/16 pol.) e cor (elásticos com borracha natural e elásticos coloridos). Para causar fadiga nos elásticos, foi utilizada uma máquina de ensaio simulando movimentos mandibulares. As leituras da força elástica foram feitas na máquina de Teste Universal Instron 4411 nos intervalos de tempo de 1, 4, 15 e 24 horas. Os dados de redução da força foram analisados pelo teste de Tukey (a= 5%). Os resultados demonstraram redução da força ao longo do tempo em todos os grupos, com o elástico colorido de 1/4 de polegada de diâmetro apresentando força significativamente maior do que o de borracha natural em todos os intervalos de tempo. Já os elásticos de 3/16 polegadas de diâmetro, apesar de apresentarem degradação de força, não apresentaram diferença significativa para os tipos de cor. Elásticos coloridos e de cor natural, de ambos os diâmetros, apresentaram degradação da força ao longo de 24 horas, porém os elásticos coloridos de 1/4 de polegada de diâmetro apresentaram valores de força superiores aos da cor natural.

This study evaluated the impact of the esthetic and occlusal characteristics of the Dental Aesthetic Index (DAI) on the need for orthodontic treatment in a non-White population.A cross-sectional study was conducted with 1296 non-White adolescents aged 12 years. DAI was the outcome variable (DAI 1 and 2 and DAI 3 and 4). The independent variables were categorized on the basis of the occlusal esthetic characteristics evaluated by DAI (tooth absence, crowding, spacing, midline diastema, maxillary misalignment, mandibular misalignment, maxillary anterior overjet, mandibular overjet, anterior open bite, and anteroposterior molar relationship). Simple logistic regression models were adjusted for the outcome, and the raw odds ratios were estimated. Variables with a P value of 0.20 for individual analyses were tested in a multiple logistic regression model, with P ≤0.05 remaining.A total of 1296 adolescents (764 girls and 532 boys) were evaluated; 1067 (82.3%) had DAI 1 or 2 (minor to a moderate need for orthodontic treatment), and 229 (17.7%) had DAI 3 or 4 (defined need for orthodontic treatment). The results showed that adolescents with diastema, maxillary irregularity, mandibular irregularity, mandibular overjet, anterior open bite, and the altered molar relationship had 5.34, 2.36, 2.63, 3.56, 8.73, and 5.16 times more likelihood to have DAI 3 or 4 (P ≤0.05), respectively.Diastema, maxillary and mandibular misalignment, mandibular overjet, anterior open bite, and anteroposterior molar relationship were the characteristics that influenced the determination of the need for orthodontic treatment in a non-White population using the DAI index.

OBJETIVO: O objetivo do presente estudo foi comparar as alterações cefalométricas associadas ao tratamento ortodôntico compensatório da má oclusão esquelética de Classe III. MÉTODOS: Estudo clínico retrospectivo realizado com 72 cefalogramas de 36 pacientes com má oclusão de Classe III esquelética e idade média de 22,9 anos (desvio-padrão 1,57 anos). O estudo incluiu pacientes com sobressaliência negativa, ângulo ANB < 0° e Wits < -1 mm. Todos os pacientes foram tratados com braquetes biofuncionais de Classe III, com torque modificado programado nos incisivos superiores (central e lateral: 0°) e inferiores (central e lateral: + 10°). As mudanças no tratamento foram comparadas com os testes t e de Wilcoxon, com nível de significância de 5%. RESULTADOS: Aumento estatisticamente significativo foi observado nas seguintes medidas: SNA, A-Nperp, ANB, NAP, Wits, AFAI, 1.SN e trespasse horizontal (p

The purpose of this research was to evaluate the esthetic impact of orthodontic treatment need in adolescents.This cross-sectional study was performed with 1172 adolescents aged 12 (n = 638) years and 15 (n = 534) years from Salvador, Bahia, Brazil. The esthetic impact was the following outcome variables: Aesthetic Component of the Index of Orthodontic Treatment Need and the Oral Aesthetic Subjective Impact Scale. The normative orthodontic treatment need was assessed by the Dental Health Component of the Index of Orthodontic Treatment Need (IOTN-DHC) and by the Dental Aesthetic Index (DAI). Logistic regression models were adjusted, estimating crude odds ratio with the respective 95% confidence intervals. The variables with P ≤0.20 in the individual analyses were tested in multiple logistic regression models, remaining the variables with P ≤0.05.The results showed a statistically significant association for the esthetic impact (Aesthetic Component of the Index of Orthodontic Treatment Need and the Oral Aesthetic Subjective Impact Scale) when assessing the normative orthodontic treatment need by the DAI (P 0.05). However, there was no significant association between subjective esthetic impact and normative needs when using the IOTN-DHC (P 0.05).DAI was more associated with the adolescents' esthetic concern than IOTN-DHC and should be the Index of Orthodontic Treatment Need to be selected to complement the patient's self-perception.

Objetivo: o presente estudo in vitro objetivou avaliar a resistência de união ao cisalhamento (RUC) de braquetes colados sobre cerâmica feldspática, com diferentes concentrações de ácido fluorídrico (AF), na presença ou não de adesivo, e, posteriormente, o Índice de Adesivo Remanescente (ARI). Métodos: foram confeccionados 20 cilindros cerâmicos, sendo 2 cilindros por grupo, com diferentes tratamentos superficiais: G1/G6) AF1%; G2/G7) AF2,5%; G3/G8) AF5%; G4/G9) AF7,5%; G5/G10) AF10%. Após a aplicação do AF, nos grupos G1/G2/G3/G4/G5 utilizou-se silano e adesivo, enquanto nos grupos G6/G7/G8/G9/G10 utilizou-se silano. Dez braquetes foram colados por cilindro (n=20, cada grupo) com Transbond XT e todas as amostras foram submetidas à ciclagem térmica. A RUC foi testada em uma máquina universal de ensaios e, posteriormente, o ARI foi avaliado em um microscópio óptico. Os dados foram sub- metidos à ANOVA e ao teste de Tukey (p = 0,05). Resultados: para o fator AF, as concentrações de 10% (6,0 ± 0,9), 7,5% (5,7 ± 0,5) e 5% (5,6 ± 0,7) promoveram RUC estatisticamente igual e maior, respectivamente, do que as de 2,5% (4,2 ± 1,1) e 1% (3,7 ± 0,6). Verificou-se que a presença do adesivo (6,1 ± 0,9) promoveu maior RUC do que a sua ausência (4,1 ± 1,1). No ARI, houve predominância do escore 0. Conclusão: as concentrações mais altas de AF e a presença do adesivo aumentam a RUC de braquetes metálicos à superfície cerâmica, e verificou-se uma predominância de superfície cerâmica sem adesivo remanescente.

Summary Objective The present study aimed to compare the force of aesthetic wires and their non-aesthetic equivalents from two commercial brands at different displacement points, during the unloading phase at 36 °C. Materials and methods Forty samples (n = 10) were assessed, which were presented in two groups of aesthetic wires and two groups of non-aesthetic wires from the brands GAC® (Dentsply GAC® International, NY, USA) and Aditek®(Cravinhos, SP, Brazil), with 0.016-inch gauge. The orthodontic wires were maintained at a temperature of 36 °C throughout the experiment and they were subjected to the three-point bending test at a speed of 1 mm/min. The unloading values were recorded as 0.5, 1.5, and 2.5 mm of displacement. The data were subjected to Student's t-test and unequal variance t test, at 5% significance level. Results During the unloading phase, the mean force was significantly higher for aesthetic wires than non-aesthetic ones, in the deflection of 2.5 mm, presenting values means of 2.25 N (P = .0213). In deflections of 0.5 mm and 1.5 mm, the orthodontic archwires did not show significant differences in force between the thermally activated wires with aesthetic coating and their non-aesthetic equivalents (P ≥ 0.05). Conclusion It is concluded that during the unloading phase at a temperature of 36 °C, the orthodontic archwires analyzed did not show significant difference in force between thermally activated wires with aesthetic coating and their non-aesthetic equivalents at most displacement points analysed, except for the deflection of 2.5 mm, which showed higher values.

Introduction This study aimed to explore the perception of orthodontic treatment need by using the Dental Aesthetic Index (DAI) and the Index of Orthodontic Treatment Need (IOTN). Methods A cross-sectional study was conducted on a representative random sample (N = 248) of adolescents aged 12 years. The DAI and both components of IOTN were used to evaluate malocclusion. The association between the Dental Health Component of the IOTN with gender and ethnic group were analyzed by chi-square test. The concordances between the indexes were analyzed by the kappa statistic, with 95% confidence intervals (CIs). Results The prevalence of adolescents with high severity and orthodontic treatment need was 10.5% (95% CI, 6.7-14.3), 36.5% (95% CI, 32.3-44.3), and 73.4% (95% CI, 67.9-78.9) for the Aesthetic Component of the IOTN, Dental Health Component of the IOTN, and DAI, respectively. The indexes showed high agreement for the cases with low treatment need, whereas low concordance was observed for the cases with high treatment need. Conclusions The perception of orthodontic treatment need was assessed differently using DAI and IOTN.

Objective: The aim of this study was to associate the presence of oral habits with anxiety and malocclusion.Methods: Cross-sectional observational study with 199 schoolchildren 6–14 years old. Malo...

To investigate the association between temporomandibular disorder (TMD) symptoms and women's oral health-related quality of life (OHRQoL).Of the women, 86.9% in the case group, and 69.6% in the control group presented some TMD symptoms (Women with a negative impact on OHRQoL are more likely to report TMD symptoms.

Summary Objective To establish a simplified method for measuring the edge bevel radius of 0.019 × 0.025-in steel rectangular orthodontic wires, achievable in the clinical environment, and to compare it with the photographic method. Materials and methods Aided by the AutoCAD™ 2016 software, the theoretical mathematical relationship was determined between the edge rounding radius and cross-sectional dimensions (height, width, diagonals), through rectangle drawings that represent cross-sections. Two hundred segments (n = 20) were obtained from the posterior portions of 100 archwires from 10 brands (Dentaurum™; American-Orthodontics™; GAC™; 3M-Unitek™; Abzil™; Morelli™; Orthometric™; Aditek™; A-Company™; Orthomundi™). The cross-sectional measures of each segment were obtained with a micrometer and a caliper, and the edge bevel radii of these segments were calculated with the use of a mathematical formula. For the “gold standard”, the segments were included longitudinally in a phenolic resin cylinder, cross-sectioned, polished, and photographed in scanning electron microscope (SEM). The images were amplified 770× and the radii were measured with an acetate template. The micrometer and caliper measuring methods were subjected to Bland-Altman analysis and compared with the gold standard (SEM), considering ±10 μm as the maximum acceptable difference between methods. Results In the micrometre measurement, 95% of the differences from the standard were within the limits of agreement (−7.21 and 5.56 μm). For the caliper method, 95% of the differences were between −5.46 and 19.83 μm, which exceeded the fixed limit ±10 μm. Conclusion The calculation method with micrometre measurements is equivalent to the photographic method, but there is no such equivalence for the caliper measurements.

Introduction The sterilization and disinfection procedures should be adapted to the chemical profile of the metal alloys present in the instruments. Objective This study aimed to perform a micrographic assessment on the surface characteristics of the widia of orthodontic pliers with two alloy compositions subjected to the action of 0.2% peracetic acid and intensive use. Material and method Twenty distal cutting pliers were divided into two groups (n=10) according to widia composition (%wt): W1- 85% to 87% of tungsten carbide (TC) and other components in the proportion of 13% to 15% and W2 – 87.5% to 88.5% of tungsten carbide and 11.5% to 12.5% for other components. All the pliers were assessed in a stereoscopic magnifying glass (32x) after three treatments: before use (T0); after cutting 100 segments of rectangular stainless-steel wires – intensive use (T1); and after 100 sterilization cycles in 0.2% peracetic acid and intensive use (T2). The cutting sites of all pliers were standardized. Widia regions were defined by line “A” representing T1 and line “B” representing T2. A frequency distribution table and Fisher’s exact test (α=0.05) was performed. We assessed two widia from each composition and treatment in SEM and energy-dispersive X-ray spectroscopy (EDS/SEM). Result The results showed that W1 pliers presented significantly fewer defects after the sterilization cycles with peracetic acid and intensive use than W2 pliers (p=0.0198). There were no differences between both pliers after intensive use (p=1.000). Conclusion The SEM images and EDS analyses showed changes in widia surfaces after the different treatments. Widia composition affected the resistance of the orthodontic pliers after sterilization cycles with 0.2% peracetic acid and intensive use. Resumo Introdução Os procedimentos de esterilização e desinfecção devem ser adaptados ao perfil químico das ligas metálicas presentes nos instrumentos. Objetivo O objetivo do estudo foi realizar uma avaliação micrográfica das características da superfície da widia de alicates ortodônticos com duas composições de ligas submetidas à ação de ácido peracético a 0,2% e uso intensivo. Material e método Vinte alicates de corte distal foram divididos em dois grupos (n=10), de acordo com a composição widia (% em peso): W1- 85% a 87% de carboneto de tungstênio e outros componentes na proporção de 13% a 15% e W2 - 87,5% a 88,5% de carboneto de tungstênio e 11,5% a 12,5% para outros componentes. Os alicates foram avaliados em uma lupa estereoscópica (32x) após três tratamentos: antes do uso (T0); após corte de 100 segmentos de fios retangulares de aço inoxidável- uso intensivo (T1); após 100 ciclos de esterilização em ácido peracético a 0,2% e uso intensivo (T2). Os locais de corte dos alicates foram definidos pela linha “A” representando T1 e pela linha “B” representando T2. Foi realizada uma tabela de distribuição de frequências e o teste exato de Fisher (α=0,05). As widias foram avaliadas em MEV e Espectroscopia de Energia Dispersiva. Resultado Os alicates W1 apresentaram defeitos significativamente menores após os ciclos de esterilização com ácido peracético e uso intensivo do que os alicates W2 (p=0,0198). Não houve diferenças entre os dois alicates após uso intensivo (p=1.000). Conclusão As imagens de MEV/EDS mostraram alterações nas superfícies widia após os diferentes tratamentos. A composição widia afetou a resistência do alicate ortodôntico após ciclos de esterilização com ácido peracético a 0,2% e uso intensivo.

Objective: This study aimed at evaluating whether changes in the insertion angle is a determining factor in the positioning of the miniscrews body in a region with larger interradicular space in the posterior maxilla. Methods: Analysis of 60 posterior maxillary quadrants were made using images obtained by means of cone-beam computed tomographic image (CBCT), with 0.076-mm voxel, which presented a real miniscrew inserted in the mesial region of the maxillary first molars, serving as reference point for the placement of the virtual miniscrews. Measurements of the distances between roots were made in three points on the body of the virtual miniscrews (A, B and C), at four different angulations, 70o, 60o, 50o and 40o (T1 to T4), in relation to the long axis of the second premolar. This evaluation was made in four groups, selected in accordance with the disposition of the roots of the second premolars and first molars: Group 1 (all types of roots), Group 2 (convergent roots), Group 3 (divergent roots) and Group 4 (parallel roots). Results: There were no statistically significant differences in the measurements of points A, B and C, at the different angles (70o, 60o, 50o and 40o) and in the different groups (p > 0.05). Conclusions: Changes in the insertion angle is not a determinant factor in the positioning of miniscrews body in regions with larger interradicular space in posterior maxilla. RESUMO Objetivo: o presente estudo objetivou avaliar se alterações no ângulo de inserção do miniparafuso são um fator decisivo para a adaptação do corpo do parafuso em áreas com espaço inter-radicular aumentado, na região posterior da maxila. Métodos: foram realizadas análises em 60 quadrantes maxilares posteriores, a partir de imagens obtidas por tomografia computadorizada de feixe cônico (TCFC), com voxel de 0,076 mm, as quais apresentavam um miniparafuso real inserido na região mesial dos primeiros molares superiores, utilizado como ponto de referência para a inserção de miniparafusos virtuais. As distâncias inter-radiculares foram mensuradas utilizando-se três pontos marcados no corpo dos miniparafusos virtuais (A, B e C), inseridos com quatro angulações diferentes (70°, 60°, 50° e 40°) (T1 a T4) em relação ao longo eixo do segundo pré-molar. A avaliação foi realizada em quatro grupos, selecionados de acordo com a disposição das raízes dos segundos pré-molares e primeiros molares: Grupo 1 - contendo todos os tipos de raízes; Grupo 2 - raízes convergentes; Grupo 3 - raízes divergentes; e Grupo 4 - raízes paralelas. Resultados: não houve diferença estatisticamente significativa entre as medidas dos pontos A, B e C nas diferentes angulações (70°, 60°, 50° e 40°) ou entre os grupos (p > 0,05). Conclusões: alterações no ângulo de inserção dos miniparafusos não são um fator decisivo para a adaptação do corpo do parafuso, em áreas com espaço inter-radicular aumentado entre primeiro molar e segundo pré-molar superiores.

O objetivo foi verificar a relação entre Sintomas de Disfunção Temporomandibular (DTM), bruxismo, estresse e fatores sociodemograficos em estudantes universitários. Foram aplicados questionários em 362 estudantes de Odontologia, na faixa etária de 17 a 56 anos de ambos os sexos. A coleta de dados foi realizada através do questionário para triagem para Dor Orofacial e DTM recomendado pela Academia Americana de Dor Orofacial, questionário de sintomas de Bruxismo baseado nos critérios da Academia Americana de Medicina do Sono, Escala de Estresse Percebido (PSS-14) e um questionário estruturado sociodemográfico. Os dados foram analisados por meio de regressão logística múltipla, considerando um nível de significância de 5%. Os sintomas de DTM foram relatados por 60%, o bruxismo por 37% e o estresse em 52% dos estudantes universitários avaliados. Verificou-se que universitários do sexo feminino, que estudam no período noturno e com estresse têm 3.36 (IC95%: 1.87-6.01), 1.71 (IC95%: 1.05-2.79) e 1.90 (IC95%: 1.17-3.08) vezes mais chance, respectivamente, de apresentar pelo menos um sintoma de DTM (P

This study aimed to assess the impact of a Government Income Support Program in orthodontic treatment need and on adolescents' oral health-related quality of life (OHRQoL). A population-based, matched case-control study involving 309 adolescents aged 11-14 years was conducted in the northeast of Brazil (Bahia, Brazil). The case group (with impact on OHRQoL) and the control group (no impact on OHRQoL) were matched by age and sex (p>0.05) at a ratio of 2: 1 (206 controls: 103 cases). Impact on the adolescent's OHRQoL was assessed using the Brazilian version of the Child Perceptions Questionnaire (CPQ11-14). Families who received Bolsa Família determined their participation in Government's Income Support Program. The Dental Health Component of the Index of Orthodontic Treatment Need (IOTN-DHC) determined the orthodontic treatment need. The data were analyzed using conditional logistic regression (p≤0.05; 90%CI). The results showed that 96.1% of adolescents in the case group and 89.3% of adolescents in the control group present orthodontic treatment need. Adolescents with a negative impact on OHRQoL are 2.75 (90%CI: 1.12-6.72) times more likely to present orthodontic treatment need than the control group. The exposure factor to Government Income Support Program did not affect the adolescent's OHRQoL. However, adolescents reported a negative impact of orthodontic treatment need in their OHRQoL. Este estudio tuvo como objetivo evaluar el impacto de un Programa de Apoyo a los Ingresos del Gobierno en la necesidad de tratamiento de ortodoncia y en la calidad de vida relacionada con la salud bucal de los adolescentes (CVRSB). En el noreste de Brasil (Bahía, Brasil) se llevó a cabo un estudio de casos y controles emparejado basado en la población que incluyó a 309 adolescentes de 11 a 14 años. El grupo de casos (con impacto en CVRSB) y el grupo de control (sin impacto en CVRSB) se emparejaron por edad y sexo (p> 0,05) en una proporción de 2: 1 (206 controles: 103 casos). El impacto en la CVRSB del adolescente se evaluó mediante la versión brasileña del Cuestionario de Percepciones del Niño (CPQ11-14). Las familias que recibieron Bolsa Família determinaron su participación en el Programa de Apoyo a los Ingresos del Gobierno. El componente de salud dental del índice de necesidad de tratamiento de ortodoncia (IOTN-DHC) determinó la necesidad de tratamiento de ortodoncia. Los datos se analizaron mediante regresión logística condicional (p≤0,05; IC del 90%). Los resultados mostraron que el 96,1% de los adolescentes del grupo de casos y el 89,3% de los adolescentes del grupo de control presentan necesidad de tratamiento de ortodoncia. Los adolescentes con un impacto negativo en la CVRSB tienen 2,75 (IC del 90%: 1,12-6,72) veces más probabilidades de presentar necesidad de tratamiento de ortodoncia que el grupo de control. El factor de exposición al Programa de Apoyo a los Ingresos del Gobierno no afectó a la CVRSB del adolescente. Sin embargo, los adolescentes informaron un impacto negativo de la necesidad de tratamiento de ortodoncia en su CVRSB. O objetivo deste estudo foi avaliar o impacto de um Programa de Apoio à Renda do Governo na necessidade de tratamento ortodôntico e na qualidade de vida relacionada à saúde bucal (QVRSB) de adolescentes. Um estudo de caso-controle pareado de base populacional envolvendo 309 adolescentes de 11 a 14 anos foi realizado no Nordeste do Brasil (Bahia, Brasil). O grupo de caso (com impacto em QVRSB) e o grupo de controle (sem impacto em QVRSB) foram pareados por idade e sexo (p> 0,05) em uma proporção de 2: 1 (206 controles: 103 casos). O impacto no QVRSB do adolescente foi avaliado por meio da versão brasileira do Child Perceptions Questionnaire (CPQ11-14). As famílias que receberam o Bolsa Família determinaram sua participação no Programa de Apoio à Renda do Governo. O Componente de Saúde Bucal do Índice de Necessidade de Tratamento Ortodôntico (IOTN-DHC) determinou a necessidade de tratamento ortodôntico. Os dados foram analisados por regressão logística condicional (p≤0,05; IC 90%). Os resultados mostraram que 96,1% dos adolescentes do grupo caso e 89,3% dos adolescentes do grupo controle apresentam necessidade de tratamento ortodôntico. Adolescentes com impacto negativo na OHRQoL têm 2,75 (IC 90%: 1,12-6,72) vezes mais chance de apresentar necessidade de tratamento ortodôntico do que o grupo controle. O fator de exposição ao Programa de Apoio à Renda do Governo não afetou a QVRSB do adolescente. No entanto, os adolescentes relataram um impacto negativo da necessidade de tratamento ortodôntico em sua QVRSB.

Objective: To evaluate the shear bond strength of lingual orthodontic brackets with resin or metal pads, the location of bond failure and the adhesive remnant index (ARI). Methods: A total of 40 extracted upper premolars were randomly divided into two groups of 20 each: bonding with brackets having (1) pads with extended resin directly on the lingual surface of teeth, and (2) pads with metal custom base on the lingual surface of teeth. The debonding force was measured with an Instron universal testing machine. A Student’s t-test was used to assess the difference between groups (α = 0.05). Results: The results showed a significant difference between the groups (p < 0.001). The shear bond strength of metal pads was significantly higher than resin pads. Conclusions: Within the limitations of this in vitro study, it was concluded that the bond strength of lingual brackets with metal pads was higher than that of brackets with composite resin pads, due to the metal part being a single unit and welded. The failure location in the region between the bracket and the resin pad affected a higher percentage of the resin pads than the metal pads. RESUMO Objetivo: avaliar a resistência de união ao cisalhamento de braquetes ortodônticos linguais com pads em resina e metálicos, assim como os locais de ocorrência das falhas, além do Índice de Adesivo Remanescente (ARI). Métodos: 40 pré-molares superiores extraídos foram aleatoriamente divididos em dois grupos de 20 espécimes cada, para a colagem de braquetes com: 1) pads em resina, estendida diretamente na face lingual dos dentes; e 2) pads com base metálica customizada, na face lingual dos dentes. A força de descolagem dos braquetes foi mensurada por meio de uma máquina de ensaio universal (Instron). O teste t de Student foi utilizado para avaliar diferenças intergrupos (α = 0,05). Resultados: os resultados demonstram haver diferença significativa intergrupos (p < 0,001). A resistência de união ao cisalhamento dos pads metálicos foi significativamente maior em comparação aos pads em resina. Conclusões: dentro das limitações desse estudo in vitro, foi possível concluir que a resistência de união de braquetes linguais com pads metálicos foi superior à resistência de braquetes com pads em resina composta, uma vez que os pads metálicos customizados e os braquetes são fundidos, formando uma única unidade. A porcentagem de falhas de colagem na região entre o braquete e o pad foi maior para os pads em resina, em comparação aos pads metálicos.

The aim of this study was to evaluate the effect of different number of thermal cycles on the shear bond strength (SBS) of metallic orthodontic brackets bonded to feldspathic ceramic by a composite resin. Twenty-five ceramic cylinders were etched with 10% hydrofluoric acid for 60 s and received two layers of silane. Brackets were bonded to the cylinders using Transbond XT and assigned to 5 groups (n=5): Group 1 - Control group (without thermal cycling); Group 2 - 500 thermal cycles; Group 3 - 5,000 thermal cycles; Group 4 - 7,000 thermal cycles and Group 5 - 10,000 thermal cycles. Light-activation was carried out by Radii Plus LED. SBS testing was carried out after 24 h of storage in deionized water and thermal cycling (5/55 oC and 30 s dwell time). Five brackets were bonded to each cylinder, totalizing 25 brackets for each group. Data were submitted to one-way ANOVA and Tukey’s test (α=0.05). The Adhesive Remnant Index (ARI) was evaluated at 8× magnification. The SBS (MPa) of control group (9.3±0.8), 500 (9.0±0.7) and 5,000 (8.4±0.9) thermal cycles were significantly higher than those after 7,000 (6.8±0.6) and 10,000 (4.9±1.0) thermal cycles (p

This study to evaluate the effects of different hydrofluoric acid (HF) concentrations and thermal cycling on the shear bond strength (SBS) of brackets to ceramic. Cylinders of ceramic were divided into 10 groups (n=15), according to HF concentrations: 1-1%;2-2.5%;3-5%;4-7.5%;5-10% (storage 24 h); 6-1%;7-2.5%;8-5%;9-7.5%; and, 10-10% (thermal cycling). All cylinders were etched for 60s and received one layer of silane. Metallic brackets were bonded to the cylinders using Transbond-XT, light activated for 40 s, using a LED (Radii Plus) and stored in deionized water at 37o C for 24h. The groups 6 to 10 were submitted to thermal cycling (7,000 cycles - 5o/55oC). SBS was performed in an Instron at crosshead speed of 1.0 mm/min. Data were submitted to two-way ANOVA and Tukey’s post-hoc test (α=0.05). The Adhesive Remaining Index (ARI) was evaluated at 40x magnification. The different HF acid concentrations influenced on the SBS of the brackets to ceramic (p

Introduction The orthodontic movement is directly influenced by the ability of orthodontic wires to slide through brackets and tubes. Therefore, the main concern during orthodontic movement corresponds to the frictional forces generated at the bracket-orthodontic wire interface. Objective This study aimed to evaluate the frictional resistance of esthetic orthodontic wires. Material and method Fifty test brackets were obtained and divided into five groups (n = 10) based on the type of rectangular orthodontic wire, as follows: conventional metallic wire (Morelli, Brazil) (G1, control group) and esthetic wires (G2, Ortho Organizer; G3, Tecnident; G4, Trianeiro; and G5, TP Orthodontics). The following materials and conditions were used: 0.019 x 0.025-inch wires, ceramic brackets with edgewise prescription, torque and/or angulation of 0°, and 0.022 x 0.028-inch slots. The specimens were tested for their tensile strength using an Instron universal test machine at a speed of 1.0 mm / min and a load cell of 500N. The tensile strength data were analyzed by one-way analysis of variance (ANOVA) followed by Tukey’s post-hoc test, with a 5% significance level. Result The frictional resistance (N) of the metallic orthodontic wire (8.07 ± 0.43) was significantly higher than that of the esthetic wires: Ortho Organizer (4.01 ± 0.25), Tecnident (3.87 ± 0.31), Trianeiro (4.47 ± 0.26) and TP Orthodontics (4.49 ± 0.30) (p 0.05). Conclusion To conclude, the esthetic orthodontic wires tested herein showed less frictional resistance as compared to the conventional metallic wire. Resumo Introdução O movimento ortodôntico bem sucedido está diretamente relacionado com a capacidade de os fios ortodônticos deslizarem sobre os bráquetes e tubos ortodônticos. Portanto, durante a movimentação ortodôntica a principal preocupação está diretamente ligada a fricção entre o suporte e o fio. Objetivo O objetivo deste estudo foi avaliar a influência de fios ortodônticos estéticos na resistência ao atrito. Material e método Foram utilizados 50 bráquetes-teste divididos em 5 grupos, de acordo com o fio retangular (n=10): G1 – grupo controle: fio metálico convencional (Morelli, Brasil) e fios estéticos (G2 – Ortho Organizer; G3 – Tecnident; G4 – Trianeiro; e, G5 – TP Orthodontics). Todos os fios apresentavam 0,019 x 0,025 polegadas e o bráquete era cerâmico, prescrição Edgewis e, torque e/ou angulação 0° e, canaleta 0,022 x 0,028 polegadas. O teste de resistência ao atrito sob força de tração foi realizado em uma máquina de ensaio universal Instron à velocidade de 1,0 mm/min e célula de carga de 500N. Os dados de resistência ao atrito foram submetidos à análise de variância (ANOVA) um fator e ao Teste de Tukey com nível de significância de 5%. Resultado O atrito (N) do fio metálico (8,07±0,43) foi significativamente maior que os fios ortodônticos estéticos: Ortho Organizer (4,01±0,25), Tecnident (3,871±0,31), Trident (4,47±0,26) e, TP (4,49±0,30) (p0,05). Conclusão Conclui-se que os fios ortodônticos estéticos apresentam menor resistência ao atrito quando comparado ao fio metálico.

Aim: To evaluate orthodontists’ knowledge and clinical practices regarding the treatment of patients with HIV/AIDS. Methods: Cross-sectional study performed with 655 Brazilian orthodontists based on a previously calculated sample size. Self-administered questionnaires were sent to orthodontists to collect information on knowledge and clinical conduct regarding the care of patients with HIV/AIDS. The study evaluated the awareness of possible risk factors for contamination, oral manifestations of HIV, need for more information on the care of HIV-positive patients, whether orthodontic treatment is indicated in HIV-positive patients, and whether they had knowingly performed orthodontic treatment in HIV-positive patients. Simple regression models were adjusted, and crude Odds Ratios estimated the associations with 95% confidence intervals. The variables with P < 0.20 in the crude analysis were tested in multiple logistic regression models, and those with P ≤ 0.05 were maintained in the final model. Magnitudes were estimated by adjusted Odds Ratios values, with 95% confidence intervals. Results: Orthodontists who were aware of the oral manifestations of HIV/AIDS, those having work experience of more than 20 years, and those who believed that orthodontic treatment could be indicated for these patients were 3.30 (1.79-6.10), 2.74 (1.36-5.52) and 1.92 (1.13-3.24) times more likely to perform orthodontic treatment in HIV-positive patients, respectively. Most orthodontists (92.9%) reported they needed to obtain more information about orthodontic care in patients with HIV/AIDS. Conclusion: Although orthodontists reported feeling able and qualified to provide dental care to patients with HIV/AIDS, gaps in their knowledge need to be addressed with further training.

Objectives: The aim of this study was to investigate the association between symptoms of temporomandibular disorders (TMD), quality of life, and malocclusion.Methods: A cross-sectional observational design study was utilized among 248 schoolchildren aged 12 years old. Symptoms of TMD were assessed using the Orofacial Pain and Temporomandibular Disorders Triage Questionnaire, and subjects were further evaluated as oral-health-related quality of life (CPQ11-14), tooth clenching/grinding and malocclusion (Dental Aesthetic Index). Chi-square for independence, Odds Ratio and Mann–Whitney test were used (p = 0.05) statistically.Results: Statistically, association was detected between TMD symptoms with pain and worse quality of life (p

Introduction The purpose of this study was to examine associations among malocclusion and the contextual factors of quality of life and socioeconomic status. Methods A cross-sectional study was conducted with a population-based sample of 1256 children from 7 to 10 years old. Malocclusion was assessed clinically; oral health–related quality of life (OHRQoL) was assessed using the Brazilian version of the child perceptions questionnaire; socioeconomic status was determined from data made available by the Research and Planning Institute of Piracicaba, Sao Paulo, Brazil. Initially, bivariate analyses were performed; after this, starting with variables with P ≤0.20, multilevel multiple logistic regression models were estimated, in which the binomial distribution, function of the logistic connection, and criteria for remaining in the model at P ≤0.05 were considered. Results Of the children, 82.1% had some type of malocclusion. Increased age associated with low socioeconomic status was the determinant for occlusal problems. The determination of low OHRQoL appears to be associated with the socioeconomic status in the individual factors, and increased overjet appears to be associated with factors at the contextual level. Conclusions Socioeconomic status and age are risk factors for malocclusion. Of the malocclusions evaluated, increased overjet had the most negative influence on the OHRQoL.

Aim: The objective of this study was to measure and compare the in vitro performance of active and passive self-ligating brackets in orthodontic rotation by means of an electromagnetic field simulation. Methods: The study sample consisted of 32 mandibular right central incisor brackets (n=8), slot 0.022", that were divided into the following groups: 1) BioQuick® (Forestadent, Pforzheim, Germany) active brackets; 2) In-Ovation®R (Dentsply-GAC, Central Islip, New York, USA) active brackets; 3) Damon-Q® (Ormco, Orange, California, USA) passive brackets, and 4) Smartclip® (3M, Monrovia, California, USA) passive brackets. The orthodontic wire used was CuNiTi round section 0.016", thermoactivated at 35o C (ORMCO-Orthodontics Glendora, California, USA). The experiment was performed in a simulator machine, composed of two fixed lateral axes and a movable central axis, which simulated the dental rotation. Qualitative analysis (n = 4) was performed using SEM. After the descriptive and exploratory analysis, the yield and grade data were submitted to one-way analysis of variance (ANOVA) followed by the Tukey test, considering the level of significance of 5%. Results: In-Ovation®R brackets showed significantly higher yield than BioQuick® and Damon-Q®. Damon-Q® brackets presented a significantly lower mean value than In-Ovation R and Smartclip®. BioQuick® did not differ significantly from Damon-Q® and Smartclip®. In-Ovation®R did not differ significantly from Smartclip®. Conclusion: In the present study, it was observed that there is a difference in rotational control in the different self-ligating brackets tested being the best rotational control was the In-Ovation R® group (active), followed in descending order by the groups Smartclip® (passive), Bioquick® (active) and Damon Q® (passive).

Objective This study was designed to evaluate the skeletal, dental and soft tissue effects of mandibular deficiency treatment with the mandibular protraction appliance (MPA) using 12 factors of the Ricketts analysis. Material and method This cross-sectional retrospective study sample consisted of a group (n = 27), with Class II malocclusion, convex facial profile, increased horizontal trespass and mandibular deficiency, with initial mean age of 12.27 and final of 15.18 years, treated with fixed appliance combined with the MPA, in an average time of 2.9 years. Initial and final radiographs were investigated using Ricketts analysis. The dependent t-test was used to compare the initial and final phases of the MPA group, with a significance level of 5%. Result Statistically significant differences were observed for dental changes such as retrusion (p=0.000) and palatal inclination of the maxillary incisors (p=0.000); protrusion (p=0.000) and buccal inclination of the mandibular incisors (p=0.000); increased interincisal angle (p=0.002) and improved molar ratio (p=0.003). There was also a restriction of the anterior displacement of the maxilla (p=0.000) and a decrease in the mandibular plane angle (p=0.024). The variable inferior labial protrusion with significance (p=0.000), reiterated the improvement in the profile. Conclusion The effects of MPA on correction of malocclusion Class II, verified by Ricketts analysis occurred predominantly by dentoalveolar changes, decrease in the Mandibular Plane Angle, and restriction of anterior displacement of the maxilla, which contributed to the improvement in the patient's profile. Resumo Objetivo Este estudo analisou as alterações dentárias, esqueléticas e tegumentares promovidas pelo Aparelho de Protração Mandibular (APM) por meio da análise de Ricketts. Material e método A amostra contou com 27 pacientes (14 meninas e 13 meninos) com má oclusão de Classe II, perfil facial convexo, trespasse horizontal aumentado e deficiência mandibular, com idade média inicial de 12,27 e final de 15,18 anos, tratados com aparelho fixo combinado com o APM. A comparação das telerradiografias iniciais (T1) e finais (T2) foi realizada pelo teste t dependente, com nível de significância de 5%. Resultado Observou-se diferença estatisticamente significante para a retrusão (p=0.000) e lingualização dos incisivos superiores (p=0.000), protrusão (p=0.000) e vestibularização dos incisivos inferiores (p=0.000), aumento do ângulo interincisivos (p=0.002), melhora da relação molar (p=0.003), restrição do deslocamento anterior da maxila (p=0.000), diminuição do ângulo do plano mandibular (p=0.024) e melhora do perfil facial (p=0.000). Conclusão O APM promoveu alterações dentoalveolares, observadas principalmente pela diminuição do ângulo do plano mandibular e restrição do deslocamento para anterior da maxila que contribuíram para a melhora do perfil do paciente.

The objective of this study was to evaluate the effects of different light sources, thermocycling and silane on the bond strength of metallic brackets to ceramic. Cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Half of the cylinders (Groups 1 to 4) received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT and divided into 8 groups (n=20), according to light source (Radii Plus LED - 40 s; Groups 1, 2, 5 and 6 and XL 2500 halogen light - 40 s; Groups 3, 4, 7 and 8) and experimental conditions with (Groups 2, 4, 6 and 8) without thermocycling (Groups 1, 3, 5 and 7). Shear bond testing was carried out after 24 h of deionized water storage (Groups 1, 3, 5 and 7) and thermocycling (Groups 2, 4, 6 and 8; 7,000 cycles - 5°/55 °C). Date were submitted to three-way ANOVA and Tukey's post hoc test (α=0.05). The Adhesive Remnamt Index (ARI) was evaluated at 8× magnification. The application of silane was effective in increasing the shear bond strength of the brackets to ceramic (p

This study investigated the influence of water storage (24 h and 6 months), and Transbond XT and Fuji Ortho LC bonding materials on the bond strength of metallic brackets bonded to feldspathic ceramic. Four cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Each cylinder received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT or Fuji Ortho LC. Light-activation was carried out with 40 s total exposure time using Bluephase G2. Half the specimens for each bonding materials (n=20) were stored in distilled water at 37 °C for 24 h and the other half for 6 months. Shear bond strength testing was performed after storage times at a crosshead speed of 1 mm/min. The adhesive remnant index (ARI) was used to evaluate the amount of adhesive remaining on the ceramic surface at ×8 magnification. Data were subjected to two-way ANOVA and Tukey's test (p

Aim: The study evaluated, using histomorphometry, the percentage of hyaline area in periodontal ligament (PDL) and root resorption in orthodontic tooth movement (OTM). Methods: Ten rats were divided into two groups. G3 Group (n=5), with 3 days of OTM and G7 Group (n=5), with 7 days of OTM. A Control Group (n=5) consisted of contralateral teeth of each animal, which were not moved. Maxillary left first molar was moved, using stainless steel spring connected to the incisors with 40g force. Microscopic analysis was done in transversal sections of the mesiovestibular (MV) and distovestibular (DV) roots in the cervical level. Results: There was a PDL hyaline area in the DV root of 6.2% in G3 and 1.8% in G7. The root resorption area in G7 was 0.9%. On MV root and Control Group were not found occurrences of hyaline areas in PDL and no root resorption. Conclusions: Based on the results obtained, it might be concluded that smaller roots showed higher frequency of hyaline areas and root resorption.

Aim: This in vitro study investigated the effect of the application of an adhesive, silane and thermal cycling (TC) on the shear bond strength (SBS) of ceramic brackets to feldspathic ceramic. Methods: 16 cylinders of feldspathic ceramic were etched with hydrofluoric acid and divided into four groups (n=4): G1 - silane, without TC; G2 – silane, with TC; G3 - adhesive, without TC; G4 - adhesive, with TC. One layer of silane was applied on the surface of cylinders in G1 and G2 e one layer of photo-activated adhesive Single Bond Universal was used in G3 and G4. Ceramic brackets were bonded using Transbond XT. The SBS data were subjected to two-way ANOVA and Tukey’s post hoc test (α=0.05). The Adhesive Remnant Index (ARI) was evaluated at 40× magnification. Results: Silane was more effective than adhesive on the SBS of the brackets to ceramic (p

Objective To evaluate the difference in surface roughness of stainless steel archwires of different commercial brands used in lingual orthodontics. Materials and methods Precontoured arches measuring 0.016″ × 0.022″ were selected of the following brands: Tecnident, Adenta, G&H, Highland Metals Inc., Ormco, Incognito, and Ebraces. Quantitative evaluation of the surface roughness of archwires was performed by means of an atomic force microscope in contact mode. Three surface readouts were taken of each sample, analyzing areas of 20 × 20 μm. Each scan of the samples produced a readout of 512 lines, generating threedimensional images of the wires. The analysis of variance statistical test was applied to prove significant variables (p > 0.05), with H0 being rejected and H1 accepted. Results The Incognito brand showed the lowest surface roughness. The archwires of brands Adenta, Tecnident, Highland, and Ormco showed similar values among them, and all close to these obtained by the Incognito brand. The archwires of the Ebraces brand showed the highest surface roughness, with values being close to those of the G&H Brand. Conclusion There was a statistical difference in surface roughness of orthodontic archwires among the brands studied. Clinical significance Companies should pay attention to the quality control of their materials, as these may directly affect the quality of orthodontic treatment. How to cite this article Facchini FMM, Filho MV, Vedovello SAS, Cotrim FA, Cotrim-Ferreira A, Tubel CAM. Wire Roughness Assessment of 0.016″ × 0.022″ the Technique Lingual Orthodontics. J Contemp Dent Pract 2017;18(4):295-299.

Aim: to evaluate the synergic impact of muscular TMD and malocclusion on quality of life, masticatory capacity and emotional features of young adults. Methods: this cross-sectional study comprised 4 groups (n= 15): G1, individuals without TMD or malocclusion; G2, with TMD and malocclusion; G3, with TMD and without malocclusion, and G4, without TMD and with malocclusion. Muscular TMD was diagnosed by RCD/TMD. Data included quality of life (OHIP-14), masticatory capacity test (X50), emotional stress (PSS-14), depression (MDI), pain intensity and salivary cortisol. Comparative statistical analysis included One-way ANOVA and Tukey post hoc test (X50, stress and cortisol) and GENMOD followed by Wald test (OHIP-14 and pain data). Fisher's and Pearson's association analysis were carried out. Results: Comorbidity of muscular TMD and malocclusion leads to significant lower masticatory capacity (p

Aim: The aim of this study was to verify the frictional force during sliding mechanics in orthodontic tooth movement, using conventional metal brackets of the active and passive self-ligating types with stainless steel and copper nickel titanium archwires. Methods: This experimental in vitro study was conducted with conventional metal (Morelli, Sorocaba, SP, Brazil) brackets, active self-ligated (SLI Morelli, Sorocaba, SP, Brazil) and passive self-ligated (SLP Morelli, Sorocaba, SP, Brazil), with slot 0.022 x 0.028 inches and Roth prescription. The brackets were tested with rectangular section 0.019 x 0.025 inch copper nickel titanium and stainless steel archwires. For each type of bracket, 10 sets of plate/bracket/archwire segment (n=10) were fabricated. Non-parametric Kruskal Wallis and Dunn tests were used for comparison between types of brackets and Wilcoxon tests for comparison between types of archwires. Results: The results showed that the frictional force values were higher with copper nickel titanium than with stainless steel archwires (p

OBJETIVO: o proposito deste estudo foi avaliar a dureza Knoop do esmalte, resistencia ao cisalhamento e padrao de falha (adesiva; interface braquete/resina; e mista) apos a colagem e descolagem de braquetes, utilizando uma resina composta com fluor (Ortho Lite Cure, Ortho Source®) e uma sem fluor (Orthobond, Morelli®). METODOS: fragmentos (6mm x 6mm) de 40 coroas de incisivos bovinos foram embutidos em resina acrilica autopolimerizavel. A dureza Knoop foi avaliada antes e apos a colagem dos braquetes metalicos. Os corpos de prova foram divididos em dois grupos: resina com fluor (Ortho Lite Cure, Ortho Source®) e resina sem fluor (Orthobond, Morelli®). Apos a colagem, os corpos de prova foram submetidos ao ciclo de desmineralizacao e remineralizacao durante 14 dias, e submetidos ao ensaio de resistencia ao cisalhamento em maquina universal de ensaios EMIC, com velocidade de 0,5mm/min. RESULTADOS: o ensaio de resistencia de uniao mostrou que nao houve diferenca significativa entre os grupos. Apos o processo de desmineralizacao e remineralizacao, os corpos de prova colados com a resina composta com fluor apresentaram maior dureza, comparados aos colados com resina sem fluor. Para ambos os grupos houve predominância de falhas na interface resina/braquete. CONCLUSAO: os corpos de prova colados com a resina composta com fluor apresentaram maior microdureza apos os processos de desmineralizacao e remineralizacao, comparados aos colados com resina composta sem fluor, porem sem diferenca para a resistencia de uniao ao cisalhamento.