配合前牙种植支抗矫治安氏Ⅱ~2错(牙合)畸形的疗效研究

Study on the efficacy of miniscrew in treatment of ClassⅡ Division 2

目的探讨配合前牙区微种植体支抗矫治成人内倾型深覆(牙合)的临床效果及矫治机理。方法选择内倾型深覆(牙合)成人患者12例,采用前牙种植钉压低唇倾上颌前牙。测量治疗前后上中切牙在锥形束CT影像上的指标变化。结果12例患者上中切牙唇倾度正常。中切牙切缘点至腭平面垂直距离减少(1.59±2.05)mm,唇向倾斜19.34°±7.96°。结论在上颌前牙区使用微种植体可以同时压低和唇倾上颌前牙。

Objective To explore the clinical effect and correction mechanism of orthodontic treatment for Class Ⅱ Division 2 with miniscrew. Methods A total of 12 adult patients with retroclined maxillary incisors and deep overbite were selected. Anterior teeth were intruded by miniscrews. The changes of upper incisors in CBCT images before and after treatment were measured. Results The inclination of the upper incisors returned to normal in 12 patients. The vertical distance from incisor edge to palatal plane decreased by(1.59±2.05)mm, and incisors labially inclined by 19.34°±7.96°. Conclusion In the maxillary anterior region, miniscrew can simultaneously intrude and labially incline upper incisors.