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目的采用直丝弓矫治技术治疗安氏Ⅱ~1类成人错牙畸形患者,探讨减数治疗前后软硬组织变化的情况及相关性。方法选取50例采用MBT直丝弓矫治技术并减数双侧上下第一双尖牙的成年安氏Ⅱ~1类错牙畸形患者。拍摄50例患者矫治前后的头颅定位侧位片并进行头影测量,采用配对t检验和Pearson相关分析以评价矫治前后软硬组织的变化情况。结果正畸减数治疗后,成年患者上下前牙突度和倾斜度明显减小,上下唇部突度减小,深覆深覆盖得到纠正,开唇露齿得到明显改善;软组织变现为鼻唇角增大,颏沟倾角增大,颏厚增加及上下唇软组织相对于E线的位置改变。结论安氏Ⅱ~1类成人错牙畸形患者采用减数治疗矫治后可有效地恢复正常覆牙覆盖,改善Ⅱ~1类患者略突的软组织面型。
Objective To treat the patients with Class Ⅱ ~ 1 adult malocclusion with straight wire arch correction, and to explore the changes of the soft and hard tissues before and after the subtraction treatment. Methods Fifty patients with malocclusion of Class Ⅱ ~ 1 malocclusion were treated by MBT with straight wire appliance and double-sided first maxillary first molar. Fifty patients underwent cranial positioning and cephalometric measurements before and after treatment. Paired t-test and Pearson correlation analysis were used to evaluate the changes of soft and hard tissues before and after treatment. Results After orthodontic reduction treatment, the height and incline of the upper and lower anterior teeth of adult patients decreased significantly, the protrusion of the upper and lower lips decreased, the deep coverage of the deep lacquer covered was corrected, and the exposed teeth and teeth were significantly improved. The soft tissues turned into nasal The lip angle increases, the chin ditch angle increases, the chin thickness increases, and the position of the upper and lower lip soft tissues relative to the E line changes. Conclusion The patients with Class Ⅱ ~ 1 adult malocclusion can recover the normal covered teeth effectively and improve the slightly protruded soft tissue surface of type Ⅱ ~ 1 patients.