Epidemiological survey of third molars in individuals from the city of Bauru

• Ano de defesa: 2019
• Autor(a) principal: Wagner, Maria Claudia
• 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: Classificação; Classification; Epidemiologia; Epidemiology; Orthodontics; Ortodontia; Terceiro molar; Third molar
• Link de acesso: http://www.teses.usp.br/teses/disponiveis/25/25144/tde-05092019-195649/

Objective: This study aimed to evaluate the prevalence, the eruption status and angulation of third molars in orthodontically untreated subjects. Material and methods: Five hundred panoramic radiographs of individuals from the Bauru region of both sexes, aged between 18 and 50 years, untreated orthodontically, with all teeth present until the second permanent molar were retrospectively selected. It was evaluated the presence of the third molars, their eruption status and their angulation using Dolphin software. The comparison of the prevalence and eruption status between the maxillary and mandibular teeth was performed by the chi-square test and the comparison of the angulations between the eruption status by the oneway ANOVA and Tukey tests. Results: The prevalence of maxillary third molars is 72.8% and of mandibular ones is 70.3%. There was a statistically significant difference between the eruption status in the maxillary and mandibular third molars. Most of maxillary third molars were erupted (63.19%), 29.94% unerupted, but considered with favorable angulation for eruption. The mandibular third molars had a higher prevalence of impaction than the maxillary molars (21.05% vs 3.85%). Conclusion: The prevalence of maxillary third molars is 72.8% and of mandibular ones is 70.3%. The maxillary third molars were more erupted than the mandibular ones, which were more impacted and partially erupted than the maxillary ones. The impacted mandibular third molars were more mesially angulated than the other eruption status.