目的 比较不同支抗技术在错畸形患者中的应用效果。方法 回顾性选取2016年6月～2018年6月我院80例安氏Ⅱ类Ⅰ分类错畸形患者,两组均接受MBT直丝弓矫治器治疗,在此基础上,A组(40例)接受微种植支抗技术,B组(40例)接受传统口外弓支抗技术,比较两组治疗前后面部软硬组织变化[上唇突度、Z角、上齿槽座角(SNA)、平面与SN平面夹角(OP-SN)]、美学效果、矫治时间。结果 治疗后A组Apg-U1﹑U1-NA﹑Ptm-U6水平低于B组(P＜0.05)；治疗后A组OP-SN、上唇突度、Z角水平均优于B组(P＜0.05)；A组矫治时间短于B组(P＜0.05)；A组面部曲线、牙齿美观、整体美感评分均高于B组(P＜0.05)。结论 使用微种植支抗技术联合MBT直丝弓矫治器治疗错畸形患者,相较于传统口外弓支抗技术矫治效果更佳,可有效改善面部软硬组织变化,缩短矫治时间,还可提高矫治美学效果,有较高的临床应用价值。

Objective To compare the application effects of different anchorage techniques in malocclusion and malformation patients. Methods From June 2016 to June 2018, 80 patients with Angle Class II Division I malocclusion were selected retrospectively. Both groups received MBT straight wire appliance treatment. On this basis, group A (40 cases) received micro-implant anchorage technique, and group B (40 cases) received traditional extraoral arch anchorage technique. The changes of facial soft and hard tissues [upper lip protrusion, Z angle, sella nasion subspinale (SNA), occlusal plane and SN plane angle (OP-SN)], aesthetic effect, and treatment time were compared between the two groups before and after treatment. Results After treatment, the levels of Apg-U1, U1-NA, and Ptm-U6 in group A were lower than those in group B (P＜0.05). After treatment, the OP-SN, upper lip protrusion and Z angle level of group A were better than those of group B (P＜0.05). The treatment time of group A was shorter than that of group B (P＜0.05). The scores of facial curve, tooth aesthetics and overall aesthetics in group A were higher than those in group B (P＜0.05). Conclusion The use of micro-implant anchorage technique combined with MBT straight wire appliance to treat patients with malocclusion malformation has a better treatment effect than traditional extraoral arch anchorage technique. It can effectively improve the changes in facial soft and hard tissues, shorten the treatment time, and can also improve the aesthetic effect of the treatment, with high clinical application value.