自攻型微螺钉种植体支抗在内收前牙正畸治疗中的临床应用

Clinical application of self-tapping screw-type micro-implant anchorage for anterior teeth retraction orthodotic treatment

目的:应用自攻型微螺钉种植体作为支抗内收前牙,评价种植体支抗的疗效。方法:选择双颌前突和上颌前突的患者10例,在上颌第二磨牙与第一磨牙间植入自攻型微螺钉种植体作为支抗内收前牙。在治疗前后拍摄头颅定位侧位片,以观察第一磨牙的位置改变。治疗结束后观察患者前牙覆颌覆盖关系和Ⅱ类磨牙关系的改变,以及面型凸度的改善程度。结果:应用自攻型微螺钉种植体作为支抗的10例患者均顺利完成正畸治疗,建立了正常的前牙覆颌覆盖关系,成功纠正了Ⅱ类磨牙关系,正侧貌改善明显,第一磨牙位置稳定。结论:自攻型微螺钉支抗可实现理想的控制效果。

Objective： To evaluate the efficacy of self-tapping screw-type micro-implant anchorage for anterior teeth. Methods： Ten patients with maxillary or bimaxillary protrusion were selected, upper first molars were extracted and upper posterior anchorage was reinforced with self-tapping screw-type micro-implant for anterior teeth retraction.The sides of cephalometric roent-genogram were taken at the beginning and the end of the treatment, and the movements of the first molar were observed. Exchanges of the anterior overbite and overjet, class Ⅱ molar relationship and improvements of facial symmetry were observed after the treatment. Results： Ten patients successfully accomplished the orthodontics treatment. They all set up correct relationship of overbite and overjet and successfully rectified the class Ⅱ molar relationship. Profile improvement was obvious and the first molarremained stable. Conclusion： Self-tapping screw-type micro-implant could provide good control in the orthodontics treatment.