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目的总结前方牵引矫治器矫治恒牙早期安氏Ⅲ类错畸形的临床应用效果。方法选择正畸门诊14例恒牙早期安氏Ⅲ类错畸形要求矫治的患者,使用前方牵引器进行矫治。分别拍摄术前、术后头颅定位侧位片,进行ⅹ线头影测量分析。结果14例患者均经6-9个月(平均7.8个月)的前方牵引矫治治疗。Ⅲ类错畸形纠正,A点前移,上、下颌骨间不调改正,侧貌改善明显。结论恒牙早期安氏Ⅲ类错畸形应用前方牵引可促进上颌发育、前移,抑制下颌向前方生长,能有效改善患者侧貌外形。
Objective To summarize the clinical effect of anterior traction appliance in the treatment of early Angle Class Ⅲ malocclusion. Methods 14 cases of orthodontic patients who had orthodontic treatment were enrolled in the study. The preoperative and postoperative skull positioning lateral radiographs were taken, and the suture line cephalometric analysis was performed. Results All the 14 patients were treated with traction treatment in front of 6-9 months (average 7.8 months). Class Ⅲ malocclusion deformity correction, A forward, upper and lower jaw not adjusted to correct the profile improved significantly. Conclusions The application of anterior traction in Angle Ⅲ malocclusion in early stage of permanent dentition can promote maxillary development and advancement and inhibit the growth of mandibular anterior segment. It can effectively improve the profile of the patient.