Avaliação cefalométrica do padrão facial de pacientes com protrusão maxilar tratados com aparelho extrabucal

Abstract

Class II skeletal malocclusion may be related to bone disease, whether or not it has an association with dental and functional factors. Cephalometric analysis is a comprehensive method to analyze the spatial dimensions, investigating the vertical changes in the severity of the occasion in the anteroposterior direction. The objective of the present study was to evaluate the vertical facial changes in patients treated with the modified Thurow extraoral appliance for an active period of at least 6 months. This evaluation was done through cephalometric analyzes: Wylie & Johnson; Siriwat and Jarabak; Gebeck, Merrifield and Horn; and Ricketts. This was a longitudinal and retrospective clinical study, with a sample of 46 lateral cephalometric cephalometric archives (23 pre-treatment and 23 post-treatment). Regarding the analysis of Wylie and Johnson, a previous total of the mean facial height (AFAT) was 113.08 mm and a final 118.20 mm; of the anterior superior facial face (AFAS) was 48.17 mm and a final of 51.27 mm; of the lower anterior facial height (AFAI) was 64.90 mm and a final 63.9 mm. The analysis of Siriwat and Jarabak presented the following averages: total posterior facial height (AFPT) of 67.29 mm and final of 71.37 mm; in the anterior superior facial face (CPAP) of 30.91 mm and final of 32.12 mm and lower posterior facial height (AFPI) of 36.37 mm and final of 39.25 mm. The analysis by Gebeck, Merrifield and Horn expressed the following data, on average: initial facial height index (LAI) of 59.72 mm and final of 61.46 mm. From the analysis of the Ricketts statistic, the mean dolichofacial number was abandoned. The data are not large variations in facial pattern and after treatment. The present study is still under construction, and there is a need to increase the number of samples, besides the application of statistical tests to choose more concrete answers.