舌侧直丝矫治技术治疗安氏Ⅲ类错畸形的效果

摘要

目的 探讨舌侧直丝矫治技术治疗安氏Ⅲ类错畸形的效果.方法 选择2010-10至2016-10舌侧直丝矫治的安氏Ⅲ类错患者30例.全部患者治疗前后的X线头颅侧位片用测量软件分析,测量19个标志点,部分标志点参考了北京大学医学部、Steiner、Tweed、Coben等的研究.其中骨性测量6个,牙性测量8个,软组织测量3个,垂直测量2个.比较治疗前后指标的差异.结果 与矫治前相比,SNA角、ANB角、上下唇至审美平面距有统计学差异(P ＜0.01),上切牙唇倾度加大(U1-SN、U1-NA),下前牙舌倾度加大(L1-NB),覆盖(Overjet)治疗前(-1.76±0.29),治疗后(1.08±0.20),覆盖明显加大,从负值变为正值,前牙反解除(P ＜0.01).结论 舌侧矫治技术可成功矫正恒牙期安氏Ⅲ类错畸形,使患者的牙颌面和软组织侧貌得到明显的改善.%Objective To evaluate the therapeutic effect of lingual straight wire orthodontic technology for class Ⅲ malocclusion. Methods Thirty patients with Angle class Ⅲ malocclusion treated with lingual straight wire orthodontic technology between October 2010 and October 2016 were selected. X-ray measurements of lateral cephalometric X-ray film of each patient before and after treatment were analyzed with software. A total of 19 markers were measured with reference to the studies by Peking University Health Science Center, Steiner, Tweed, and Coben, including 6 bone measurements, 8 dental measurements, 3 soft tissue measurements, and2 vertical measurements. Paired measurements by t test were used to compare the difference before and after treatment. Results After treatment, the SAN angle, ANB angle, and the distance of the upper lip to the lower lip were significantly different (P ＜ 0. 01). The labia-inclination of upper incisors (U1-SN、U1-NA) and inclination of lower incisors (L1-NB) increased. The overjet was (-1. 76 ±0. 29) before treatment and (1. 08 ± 0. 20) after treatment, so the increase was significant. The anterior crossbite was relieved (P ＜0. 01). Conclusions The lingual orthodontic technique can successfully correct the malformation of Angle class Ⅲ malocclusion in permanent teeth, so that the maxillofacial and soft tissue profile of the patients can be improved obviously.