Morphologic evaluation of symphysis alveolar process and the lower incisor position in class II, division 1 maloclusion / Avaliação da morfologia do processo alveolar da sinfise mandibular e da posição do incisivo inferior, na maloclusão classe II, divisão 1

AUTOR(ES)

Adriana Simoni Lucato

DATA DE PUBLICAÇÃO

2006

RESUMO

The aim of this study was to compare and correlate symphysis alveolar process to lower incisor position in individuals Class II, division 1 malocclusion, mesofacial and dolichofacial patterns. Fourty standardized lateral cephalograms were taken at the same radiographic center, from brazilian leucoderm youngsters, from both genders, mean age of 12 years and 2 months, who had not been undergone to any orthodontic treatment before this research. The sample consisted of four groups, divided equally according to the gender and facial pattern. Symphysis alveolar process morphology was evaluated by: LSM, L1/2SM, ApII-CV, ApII-CL and LSMAp and the lower incisor position was evaluated by: 1.NB, IMPA, FMIA, and Tweed?s cephalometric discrepancy. The error of the method was calculated and has not shown statistically significant differences, evidencing the standartization of the method. Student?s t test was used to compare the groups and the Pearson?s correlation test was applied to analyze the correlation between symphysis alveolar process morphology and the lower incisor position, in both genders and facial patterns. LSMAp and IMPA showed statistically significant differences between facial patterns, where a narrower alveolar process (x = 11,97mm) and more labially tipped incisors (x = 97,83) (p<0,05) were found in mesofacial pattern. Sexual dimorphism was not observed. Positive correlation between alveolar process width and proinclination of lower incisor was observed in both facial patterns, more evident on the male group. Tweed?s cephalometric discrepancy was negative in both facial patterns, with no statistically significant differences between patterns

ASSUNTO(S)

ortodontia processo alveolar alveolar process incisivos (dentes) incisor (teeth) orthodontics

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