配合上颌前牙微种植体支抗矫治开唇露齿的临床研究

Research on Maxillary Anterior Accompanied with Posterior Mini-implant Anchorage Treatment in Patients with Lip Incompetence

目的:探讨配合上颌前牙微种植体支抗治疗开唇露齿的临床效果。方法:选取18例开唇露齿正畸治疗患者,分为实验组A(前后3枚种植支抗)9例和对照组B(传统Nance托支抗)9例。测量治疗前后头颅定位侧位片的相关软硬组织指标,使用SPSS15.0进行统计分析。结果:1)牙齿位置:A组前牙切端内收量及切牙显露程度的减少显著大于B组(P<0.01),切牙根尖(P<0.05)及磨牙前移量(P<0.01)显著小于B组。垂直向A组前牙被明显压低,B组升长,P<0.01;后牙A组保持,B组升高,P<0.05。2)骨组织:A组上齿槽缘点处骨吸收改建显著大于B组(P<0.05)。结论:使用前后牙区3枚微种植体支抗,对上前牙内收、压低及控根作用均强于传统强支抗,能有效改善开唇露齿。

Objective：To determine the efficiency of maxillary anterior accompanied with posterior mini-implant as intraoral anchorage used in the patients with lip incompetence.Methods：Eighteen subjects with lip incompetence were allocated in the study.The patients were divided into two groups：group A（3 mini-implants anchorage） with 9 patients and group B（Nance holding arch） with 9 patients.Cephalometric analysis was performed before and after the treatment.All data were analyzed by SPSS15.0 software.Results：1）Teeth：The distance and angle of retracted anterior teeth and the reduce of uncovered incisors were larger in group A than group B（P0.01）.The mesial movement of incisor＇s apex（P0.05） and molar（P0.01） were less in group A.The anterior teeth were obviously intruded in group A and elongated in group B（P0.01）.Molar＇s position maintained in group A and moved occlusally in group B（P0.05）.2）Bone：The absorption of bone at SPr point was greater in group A（P0.05）.Conclusion：Combined use of anterior and posterior mini-implants can provide stronger anchorage to retract,intrude and control root movement of incisors than conventional anchorage for patients with lip incompetence.