Smile Attractiveness in the Damon and conventional systems with and without rapid maxillary expansion

• Autor(a) principal: Negreiros, Patrícia de Oliveira
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USP
• Texto Completo: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-16122021-092454/
• topic: Agradabilidade; Attractiveness; Bráquetes autoligáveis; Buccal corridor; Corredor bucal; Self-ligating brackets; Smiles; Sorrisos

Introduction: The aim of this study was to compare the smile attractiveness in different orthodontic techniques: Damon System and conventional appliances with and without rapid maxillary expansion and to evaluate the influence of the size of canine and posterior buccal corridor in smile esthetics. Methods: The sample consisted of frontal posed smile photographs of 20, 20 and 22 patients treated with self-ligating Damon system, conventional Roth system and conventional Roth system with R.M.E first, respectively. The areas of canine and posterior buccal corridor were measured in proportion to the total smile area in photographs. Through a website created specifically for the research, 62 photographs were judged on a 10 point scale by 70 orthodontists and 55 laypeople, according to individual esthetic criteria. The smile attractiveness was compared by analysis of variance with two criteria between 3 orthodontic techniques and between 2 groups of raters. The influence of the evaluator age and also the influence of the size in the buccal corridors in the smile attractiveness were measured by Pearson\'s correlation test. The analysis of variance was used to compare in size, the areas of canine and posterior buccal corridors in three sample groups. Results: No differences were found in the attractive smile between treatment techniques, but laypeople and orthodontists judged in different way smile esthetics, where the age of the evaluator did not influenced the judgment. The sizes of canine and posterior buccal corridor between sample groups were statistically similar and also had no correlation with the smile attractiveness. Conclusions: There seems to be no relationship between the size of canine and posterior buccal corridors with the type of technique used for orthodontic treatment. Different techniques do not influence the smile attractiveness. In addition, buccal corridor was not a decisive factor in assessing the esthetics of smiles.