微螺钉种植体支抗在成人双颌前突正畸治疗中的临床应用

The Clinical Application of Mini-screw Implant Anchorage in the Orthodontic Treatment of Adult Bimaxillary Protrusion

目的:总结微螺钉种植体支抗在临床中治疗成人双颌前突的经验,评价微螺钉种植体在正畸治疗中作为强支抗内收前牙的有效性.方法:从临床病例中选择12例成人双颌前突患者,矫治设计均为拔除4颗第一前磨牙,在上下颌第一恒磨牙与第二恒磨牙或上下颌第一恒磨牙与第二前磨牙之间的颊侧根尖部植入微螺钉种植体作为强支抗,共48颗,以每侧200g力滑动法关闭间隙.在治疗前后均拍摄头颅定位侧位片及全颌曲面断层片,比较双颌前突患者治疗前后前牙内收情况及第一恒磨牙位置的变化.结果:12例成人双突患者面型均得到明显改善,应用微螺钉种植体支抗顺利完成正畸治疗,第一恒磨牙位置稳定.结论:微螺钉种植体支抗可避免上颌磨牙的前移,能为上下颌前突畸形的矫治提供有效的支抗.

Objective：To summarize the experience of applying mini-screw implant anchorage in the clinical treatment of adult bimaxillary protrusion. To evaluate the effectiveness of mini-screw implants as a strong anchorage for retracting anterior teeth in orthodontic treatment. Methods：12 cases of adult bimaxillary protrusion patients were selected from clinical patients. Orthotherapy was extraction four first premolars,in the buccal side root end area of the maxillary and mandible first permanent molar and second permanent molar or the maxillary and mandible first and second premolars,implanted mini-implant as a strong anchorage,totaly 48 teeth,used sliding method with 200g force on each side to close gaps. We took lateral cephalometric radiograph and the curved surface tomographic films of full jaw before and after treatment,compared the retractive situation of anterior teeth and the positional change of first permanent molar of bimaxillary protrusion patients before and after treatment. Results：The facial types of 12 cases were improved,the orthodontic treatments that applying mini-screw implant anchorage were successfully completed,and the position of first permanent molar was constant. Conclusion：Mini-screw implant anchorage can avoid maxillary molars moved forward,provide an effective anchorage for the orthodontic treatment of maxillary and mandible protrusion.