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目的:探讨安氏Ⅱ类Ⅰ分类青少年患者不拔牙病例矫治前后的软组织变化。方法:对27例10～15岁安氏Ⅱ类Ⅰ分类错病例进行快速扩弓,运用直丝弓矫治技术完成不拔牙矫治。测量治疗前后X线头颅侧位片的软组织指标,用SPSS13.0统计软件对13项测量数据进行统计分析。结果:治疗后鼻唇角、上唇倾角、上唇突度的变化明显(P﹤0.05),上唇前突得到了矫正。Z角和软组织面凸角的变化明显(P﹤0.05),面部侧貌协调性得到了改善。结论:运用快速扩弓器扩大牙弓宽度配合直丝弓矫治器是不拔牙治疗安氏Ⅱ类Ⅰ分类错的有效方法之一。
Objective: To investigate the changes of soft tissue before and after treatment of non-extraction group in Class Ⅱ division Ⅰ adolescent patients. Methods: Twenty-seven cases of Class Ⅱ division Ⅰ malocclusion with 10 ~ 15 years old were rapidly expanded and treated with straight wire arch technique. Before and after treatment, the soft tissue indexes of the X-ray cephalothorax were measured. Statistical analysis was performed on the 13 measurement data using SPSS 13.0 statistical software. Results: After treatment, the changes of nasolabial angle, upper lip inclination and upper lip protrusion were obvious (P <0.05), and the upper lip protrusion was corrected. The change of Z angle and soft tissue lobe was significant (P <0.05), and facial contour coordination was improved. Conclusion: It is one of the effective methods to treat Class Ⅱ division Ⅰ malocclusion without extraction of teeth by expanding the width of dental arch with rapid protractor.