国产自攻型微型钛钉支抗在内收前牙治疗中的效果

目的:探讨国产自攻型微型钛钉种植支抗在拔牙矫治内收前牙治疗中的临床应用。方法:19例诊断为安氏I类和I I类错牙合,上牙弓前突或双牙弓前突患者,矫治设计为拔除双侧第一前磨牙,支抗设计为磨牙强支抗,用微型钛钉植入上颌第一磨牙与第二前磨牙颊侧根尖之间的牙槽间隔,结合直丝弓技术进行滑动法关闭拔牙间隙。以每侧150~200 g力滑动法内收前牙。参考前颅底平面及种植体支抗的位置,比较治疗前、后头颅定位侧位片,测量前牙内收情况和磨牙支抗的变化。结果:19例牙弓突度均有明显改善,切牙切缘内收(6.73±1.83)mm,支抗磨牙平均前移0.8 mm,均达到了强支抗的效果。结论:国产自攻型微型钛钉种植支抗作为稳定的正畸支抗,操作方便,不依赖患者的合作,能有效地控制后牙支抗,使前突的牙弓获得最大程度的内收,扩大了正畸治疗的范围。

Therapeutic effect of domestic self-tapping micro-titanium nail anchorage on adducted anterior teeth

Objective:To evaluate the clinical application of domestic self-tapping micro-titanium nail as anchorage in the retraction of anterior teeth treatment.Methods:A total of 19 patients with Angle I&Angle II malocclusion,maxillary protrusion or bi-maxillary protrusion were selected.The orthodontic treatment was the extraction of the bilateral first premolares and the anchorage was designed to be a strong one for the molars.Micro-titanium nails were used to implant into the alveolar space between the buccal root apexes of the maxillary first molar and the second premolar.The extraction space was closed by using sliding mechanics combined with Straight Arch wire Techniques.Sliding mechanics with a force of 150~200 g was used to retract anterior teeth.Based on the anterior skull base plane and the location of implant anchorage,the cephalometric films before and after treatment were compared,and the retraction of anterior teeth and the change of molar anchorage were measured.Results:Dental arch protrusion was improved significantly in 19 patients.The incisal edge of incisors was retracted(6.73±1.83)mm and the anchor molar moved anteriorly 0.8 mm averagely.It shows that maximum anchorage was achieved in all cases.Conclusion:The domestic self-tapping micro-titanium nail implant anchorage is a stable orthodontic anchorage.It is easy to operate,independent of patients’collaboration,and it could control the anchorage of posterior teeth efficiently,retract the dental arch protrusion to the maximum extent,and therefore,expand the scope of orthodontic treatment.