舌侧直丝矫治技术治疗安氏Ⅲ类错畸形的效果

Evaluation lingual straight wire orthodontic technology for class Ⅲ malocclusion

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.