Assessment of maxillary and mandibular incisors inclination in individuals with class II division 1 malocclusion, according to the facial pattern
Journal Title: RSBO - Year 2009, Vol 6, Issue 4
Abstract
Introduction and objective: The aim of this study was to cephalometrically evaluate the maxillary and mandibular incisors inclination in individuals with Angle class II division 1 malocclusion,and then correlate these incisor inclinations with the facial pattern.Material and methods: The sample consisted of 44 individuals with ages ranging from 7 years and 11 months to 14 years old, divided into three groups based on the different facial patterns: brachyfacial,mesofacial and dolichofacial. The maxillary incisors inclination was evaluated using the 1.NA angle; the mandibular incisors inclination was evaluated considering –1.NB and IMPA angles. Interincisal angle was also measured (1.––1). After measuring, data were submitted to analysis of variance. Tukey’s test (alpha = 0.05) was applied to identify in which facial patterns existed difference. Results and conclusion: It was observed that only the IMPA angle measures showed statistically significant differences between its mean values according to facial pattern (p ≤ 0.05). It is concluded that mandibular and maxillary incisors were correctly positioned, considering NA and NB angles respectively. It was not possible to correlate the incisor inclinations to the facial pattern of the subjects. A positive correlation exists between mandibular incisors inclination related to Tweed’s mandibular plane (IMPA) and the facial pattern of the subjects. Furthermore, the interincisal angle was slightly decreased when compared to the normal values.
Authors and Affiliations
Aldrieli AMBROSIO, Roberto SHIMIZU, Jucienne RIBEIRO, Anibele GOMES, André Machado
Keywords
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