中国美容医学2012，Vol.21Issue(2)：284-286,3.
成年与青少年双颌前突患者正畸治疗后颏部变化的对比研究
Chin changes in bimaxillary protrusion:A comparison of the effects of tooth extraction in the adults and the juveniles
张雯雯 1张苗苗1
作者信息
- 1. 哈尔滨医科大学附属口腔医院正畸科 黑龙江哈尔滨150001
- 折叠
摘要
Abstract
Objective The aim of the study was to evaluate the chin changes in adults and juveniles with bimaxillary protrusion after extraction of the four first premolars. Methods 30 patients (15 adults and 15 juveniles) with bimaxillary protrusion after extraction of the 4 first premolars were choosen. The chin morphology changes of the two groups before and after teeth extraction were investigated with cephalometric analysis.Data were analyzed by t-test. Results There were significant increases in Proptosis degree of chin, the depth of mentolabial furrow and B'Pos/FH.while decreasing in the tilt angle of chin.No significant difference was found in the thickness of chin at B,P and root tip.the height of chin.the fossa of chin, the curve of chin and the thickness of chin soft tissue.More than 1.67 degree increase of the tilt angle of chin and 0.04 mm thickness increase of the thickness of chin soft tissue were observed in the juvenile group than in the adult. Conclusion Orthodontic treatment with the first premolar extraction can improve the morphology of the chin and the relationship of lips to chin in the patients with bimaxillary protrusion.The changes are more significant in juveniles than the adults.关键词
双颌前突/颏部/拔牙矫治Key words
bimaxillary protrusion/extraction/chin分类
医药卫生引用本文复制引用
张雯雯,张苗苗..成年与青少年双颌前突患者正畸治疗后颏部变化的对比研究[J].中国美容医学,2012,21(2):284-286,3.
