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目的:探讨导杆式矫治器治疗上颌唇侧倒置埋伏阻生中切牙的临床效果及治疗作用。方法:术前拍摄曲面断层片、头颅侧位片及CBCT明确诊断和定位患牙,用导杆式矫治器对16例上颌唇侧倒置埋伏中切牙进行外科-正畸联合治疗。固定保持1年后,拍CBCT评价远期疗效。测量矫治后埋伏牙和对侧同名牙的根长,用SPSS17.0软件进行配对t检验。结果:16例唇侧倒置埋伏中切牙均牵引入牙列排齐,牙髓和牙周状况良好。保持1年后X线及临床检查示埋伏牙均正常。埋伏牙的根长(8.32±1.70)mm短于对侧同名牙(10.12±1.71)mm(P<0.001)。结论:对未成年患者应保留上颌埋伏中切牙;导杆式矫治器是治疗上颌唇侧倒置埋伏中切牙的一种有效方法。
Objective: To investigate the clinical effect and therapeutic effect of guide bar appliance on maxillary labial inverted lower incisor impacted incisors. Methods: Twenty - five maxillary labial inverted incised central incisors were treated by surgery - orthodontics combined with guided bar appliance. Fixed for 1 year after the shoot CBCT evaluation of long-term efficacy. The root length of the teeth with the same name and opposite teeth after treatment were measured and paired t test was performed with SPSS17.0 software. Results: All the 16 labial inverted incisors with inverted incisors were drawn into the dentition, and the pulp and periodontal status were good. After 1 year X-ray and clinical examination revealed that the average number of impacted teeth was normal. The root length of the impacted teeth (8.32 ± 1.70) mm was shorter than that of the contralateral same name teeth (10.12 ± 1.71 mm) (P <0.001). Conclusion: The maxillary incisor incisors should be preserved in juvenile patients. Guiding appliance is an effective method for the treatment of maxillary labial inverted inverted incisors.