TOMY自锁矫治技术对非拔牙矫治前牙反(牙合) 伴中度拥挤患者矫治效果1例报告并文献复习

目的：观察TOMY自锁矫治技术对非拔牙矫治前牙反（牙合）伴中度拥挤的疗效，探讨其在临床中的应用。方法：选取1例前牙反（牙合）伴中度拥挤患者，诊断为安氏Ⅲ类亚类错（牙合）、毛氏Ⅱ1+Ⅰ1类错（牙合）、高角、面部不对称，应用TOMY自锁矫治技术非拔牙矫治，测量其治疗前后的头颅定位侧位片以及牙弓长度、宽度、牙槽骨宽度及基骨弓宽度。结果：矫治后患者上下颌牙列排齐整平，达到中性（牙合）关系；矫治后SNA、SNB和ANB无明显变化，上前牙唇倾度增加10°，达到正常值；矫治后患者上下颌牙弓宽度、牙槽骨宽度、基骨弓宽度及牙弓长度均较矫治前有所增加。结论：临床上对于前牙反（牙合）伴牙列中度拥挤非拔牙患者，可考虑采用TOMY自锁矫治技术，通过增加牙弓宽度和长度来改善前牙反（牙合）牙列拥挤，以达到良好的矫治效果。

Curative effect of TOMY self-ligation appliance technique in treatment of anterior crossbite and moderate crowding with non-extraction treatment:A case report and literature review

Objective:To observe the clinical effect of TOMY self-ligation appliance technique in the treatment of anterior crossbite and moderate crowding, and to explore its clinical application.Methods:A patient, manifested as anterior crossbite and moderate dentition crowing, diagnosed as Angle class Ⅲ subclass malocclusion, MaoⅡ1+Ⅰ1 malocclusion, high angle,and facial asymmetry, was selected.This patient was treated with TOMY self-ligation appliance technique without tooth extraction.The length and width of the dental arch, the width of the alveolar bone and the width of the basal arch were measured before and after treatment;the lateral radiographs of the patient were taken too.Results:After treatment,the upper and lower dentition arranged in neat rows, reached a neutral occlusal relationship;SNA, SNB and ANB had no obvious changes;the lip inclination of anterior teeth was increased by 10 degrees, and reached the normal value;the upper and lower dental arch width, alveolar bone width, basal bone arch width and dental arch length were lower than before treatment.Conclusion:For the patient with anterior crossbite and moderate dental crowding treated with non-extraction, the TOMY self-ligation technique can be considered to use, by increasing the arch width and length to improve the anterior crossbite and moderate crowding, in order to achieve the effective treatment.