Influence of maxillary canine torque variations on the perception of smile esthetics among orthodontists and laypersons.

OBJECTIVE: The purpose of this study was to determine the perception of smile esthetics among orthodontists and laypersons with respect to unilateral maxillary canine torque variations in a frontal smile analysis. METHODS: Full face and close-up smile photographs of two subjects (1 man and 1 woman) were used. Both smiles displayed healthy maxillary anterior dentitions. The images were digitally altered to obtain a bilateral 0° torque in the maxillary canines. From this image, unilateral variations of the left canine were made with -15°, -10°, -5°, 0°, +5°, +10° and +15°. Final images were randomly assembled into an album that was given to 53 orthodontists and 53 laypersons. Each rater was asked to evaluate the attractiveness of the images using visual analog scales. Data collected were statistically analyzed with one-way analysis of variance with Tukey post-hoc test and the unpaired Student t test. RESULTS: For orthodontists, most attractive smiles were those with 0°, -5° and -10°. For laypersons, most attractive smiles were those with 0°, -5°, -10°, -15° and + 5°. For both groups, the lowest scores were given for the smiles with +10° and +15° torque. When comparing the perceptions of the orthodontists and laypersons, they did not show statistical differences in most situations. Moreover, in general, there was no significant difference between the full-face and close-up assessments of the smiles. CONCLUSIONS: The present findings indicated that smiles with unilateral palatal (negative values) maxillary canine torque variations were more tolerated than smiles with buccal crown torque (positive values) variations.

Influence of maxillary canine torque variations on the perception of smile esthetics among orthodontists and laypersons

ABSTRACT Objective: The purpose of this study was to determine the perception of smile esthetics among orthodontists and laypersons with respect to unilateral maxillary canine torque variations in a frontal smile analysis. Methods: Full face and close-up smile photographs of two subjects (1 man and 1 woman) were used. Both smiles displayed healthy maxillary anterior dentitions. The images were digitally altered to obtain a bilateral 0° torque in the maxillary canines. From this image, unilateral variations of the left canine were made with -15°, -10°, -5°, 0°, +5°, +10° and +15°. Final images were randomly assembled into an album that was given to 53 orthodontists and 53 laypersons. Each rater was asked to evaluate the attractiveness of the images using visual analog scales. Data collected were statistically analyzed with one-way analysis of variance with Tukey post-hoc test and the unpaired Student t test. Results: For orthodontists, most attractive smiles were those with 0°, -5° and -10°. For laypersons, most attractive smiles were those with 0°, -5°, -10°, -15° and + 5°. For both groups, the lowest scores were given for the smiles with +10° and +15° torque. When comparing the perceptions of the orthodontists and laypersons, they did not show statistical differences in most situations. Moreover, in general, there was no significant difference between the full-face and close-up assessments of the smiles. Conclusions: The present findings indicated that smiles with unilateral palatal (negative values) maxillary canine torque variations were more tolerated than smiles with buccal crown torque (positive values) variations.

RESUMO Objetivo: o objetivo do presente estudo foi avaliar a percepção estética do sorriso, por ortodontistas e leigos, em relação a variações unilaterais do torque do canino superior, em uma análise frontal do sorriso. Métodos: foram utilizadas fotografias de face total e de sorriso aproximado de dois indivíduos (1 homem e 1 mulher). Ambos os sorrisos exibiam dentição anterossuperior saudável. As imagens foram alteradas digitalmente para obtenção de um torque bilateral de 0° nos caninos superiores. A partir dessa imagem, variações unilaterais do canino esquerdo foram realizadas com -15°, -10°, -5°, 0°, +5°, +10° e +15°. As imagens finais foram montadas aleatoriamente em um álbum que foi entregue a 53 ortodontistas e 53 leigos. Cada avaliador foi orientado a avaliar a atratividade das imagens com escalas visuais analógicas. Os dados coletados foram analisados estatisticamente com análise de variância ANOVA com pós-teste de Tukey e teste t de Student não pareado. Resultados: para ortodontistas, os sorrisos mais atraentes foram aqueles com 0°, -5° e -10°. Para os leigos, os sorrisos mais atraentes foram aqueles com 0°, -5°, -10°, -15° e +5°. Para ambos os grupos, as pontuações mais baixas foram dadas para os sorrisos com torque de +10° e +15°. Ao comparar as percepções dos ortodontistas e leigos, não foram encontradas diferenças estatísticas na maioria das situações. Além disso, em geral, não houve diferença significativa entre as avaliações de face total e de sorriso aproximado. Conclusões: esses achados indicam que os sorrisos com variações unilaterais no torque do canino superior para palatino (valores negativos) foram mais tolerados do que os sorrisos com variações no torque da coroa para vestibular (valores positivos).

Abordagem ortodôntica em pacientes portadores de fissuras labiopalatinas – relato de caso / Orthodontic approach in patients with cleft lip and palate – case report

Objetivo: Este artigo tem como objetivo fazer uma revisão de literatura sobre as fissuras labiopalatinas, bem como apresentar um caso clínico de paciente fissurado tratado ortodonticamente. Materiais e Métodos: A paciente relatada apresentava Fissura Pré-Forame Incisivo Bilateral Completa, já com o lábio fissurado reparado por queiloplastia pelo cirurgião-plástico. Inicialmente, foi feita interceptação com a mecânica 2 x 2 para correção dos dentes anteriores vestibularizados e girovertidos, seguida de enxertia óssea alveolar secundária realizada com o cirurgião bucomaxilofacial e tendo a finalização do tratamento com Ortodontia Corretiva Fixa e reanatomizações dentárias com especialista em Dentística. Conclusão: Pôde-se concluir que os ortodontistas devem estar preparados para atender tais pacientes e para implementar o melhor tratamento para cada caso, sendo imprescindível uma equipe interdisciplinar atuante.(AU)

Objective: This article aims to make a literature review on cleft lip and palate, as well as to present a clinical case of a patient with a cleft lip treated ortodontically. Materials and Methods: The patient presented had complete bilateral incisive pre-foramen cleft with cleft lip already repaired through cheoloplasty performed by a plastic surgeon. The first interception was made with 2 x 2 mechanics for correction of proclined and rotated anterior teeth, followed by secondary alveolar bone grafting performed by a maxillofacial surgeon and the conclusion of the treatment was made with fixed orthodontic appliance and dental reshaping with a cosmetic dentistry specialist. Conclusion: It could be concluded that orthodontists should be prepared to attend such patients and implement the best treatment for each case, being essential an active interdisciplinary team.