微种植体支抗治疗双颌前突患者前后颜面形态改变的研究

Study of facial changes in the patients of bimaxillary protrusion after orthodontic treatment with micro-implant anchorage

目的探讨双颌前突患者微型种植体矫治前后软、硬组织变化的相关规律,评估微种植体支抗矫治双颌前突患者的治疗效果。方法选取使用微型种植体支抗矫治双颌前突患者15例。对治疗前后的头颅侧位X线片进行测量分析,评价微种植体支抗在双颌前突患者治疗中的临床效果,并分析软硬组织变化的相关性。设计调查表调查患者对治疗效果的满意程度。结果矫正结束,患者面型均得到了显著改善。上切牙内收(3.12±0.90)mm,下切牙内收(2.63±0.83)mm,上下唇突度分别减少了(3.45±1.19)mm和(2.18±0.38)mm,且鼻唇角增大。软硬组织的变化存在相关性,其中上下唇突度、鼻唇角大小的改变与前牙突度的改变呈高度相关。93.3%患者对治疗效果满意。结论使用微型种植体支抗可以使上下前牙得以有效内收,同时改善面型,取得良好的临床效果。

Objective To explore the change regulation of hard and soft tissue and to assess the effect of miniscrew implant anchorage( MIA) on patients with bimaxillary protrusion by digital cephalometric analysis and survey before and after treatment. Methods Soft and hard tissue changes were measured on the lateral cephalometric radiographs of 15 cases with bimaxillary protrusion who were treated with MIA before and after treatment in order to analyze the relevance of hard and soft tissue changes and evaluate the effects of MIA. Patient satisfactory survey was also adopted. Results Patients' appearances were all significantly improved after the treatment.Adduction of upper incisors was( 3. 12 ± 0. 90) mm,while adduction of lower incisors was( 2. 63 ± 0. 83) mm. The protrusion of upper/lower lip decreased by( 3. 45 ± 1. 19) mm /( 2. 18 ± 0. 38) mm respectively with the increase of nasolabial angle. There were relevant rules between hard and soft tissue change,in which upper and lower lip protrusion and nasolabial angle changes were highly correlated with the change of the anterior incisors protrusion. 93. 3% patients were satisfied with the treatment result. Conclusions MIA can adduct the upper and lower incisors effectively,as well as improve the face profile and achieve good clinical results.