Influence of posterior discrepancy in anterior open bite severity

• Ano de defesa: 2017
• Autor(a) principal: Del Castillo, Arón Aliaga
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Cefalometria; Cephalometry; Má Oclusão; Malocclusion; Mordida Aberta; Open Bite
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-25102021-105851/

Introduction: This study aimed to determine the effect of posterior discrepancy and third molar angulation on the overbite. Methods: Pretreatment lateral cephalograms of 131 subjects were analyzed. The sample included 83 open bite and 48 deep bite subjects. A multiple regression analysis was used to evaluate the influence of maxillary and mandibular posterior discrepancy and third molar angulation (predictor variables) on the overbite. Correlations between posterior discrepancy and third molar angulation, and correlations between predictor variables and dental angulation and height of posterior teeth and incisors were evaluated with Pearson´s correlation coefficient. Extreme subgroups with accentuated negative and positive overbites (27 open bite and 37 deep bite) were compared using T tests. Results: The multiple linear regression analysis showed a positive correlation of the mandibular third molar mesial angulation with the overbite. Posterior discrepancy was negatively associated with posterior teeth mesial angulation and dentoalveolar height. The deep bite subgroup showed significantly greater mesial angulation of the mandibular third molars than the open bite subgroup. Conclusion: There was no effect of the posterior discrepancy on the overbite. There was a positive correlation of the mandibular third molar mesial angulation with the overbite.