微种植钉支抗矫治双侧后牙正锁的临床应用

Clinical Application of Micro-implant Anchorage in Treatment of Two-side Molar Scissors-bite

目的探讨微种植钉支抗在矫正双侧后牙正锁的临床应用价值.方法采用微种植钉作为支抗牵引压低颊向倾斜的上颌后牙,或(和)牵引压低舌侧倾斜的下颌后牙,矫正双侧后牙正锁,并对矫正前后X线投影测量结果进行比较分析.结果微种植钉支抗对锁牙有一定的压低作用,U7-PP,L7-MP均减小,且差异有统计学意义(P<0.05);微种植钉支抗有效控制了下颌平面角FH-MP的增大,矫治前后FH-MP无明显改变(P>0.05);SNA、SNB、ANB均无明显变化(P>0.05).结论微种植钉支抗矫正双侧后牙正锁,可有效压低患牙,控制患者的垂直高度,方法简单、高效.

Objective To discuss the clinical application of micro-implant anchorage in the treatment of two-side molar scissors-bite.Method Micro-implant anchorage was used to intrude the upper overextruding posterior teeth,and（o）r micro-implant anchorage was used to draw buccally the low posterior teeth tilting lingually.Results The overextruding upper posterior teeth were intruded,the low posterior teeth tilting lingually were upreared buccally.U7-PP,L7-MP became smaller than before,and the the different is significant in statistics（P0.05）.Conclusion MIA could be used as an efficient method to correct scissors-bite on two-side molar scissors-bite with intruding overgrowth upper posterior teeth,or uprearing buccally the tilting low posterior teeth.