上颌前方牵引加阻挡曲矫治混合牙列期Ⅲ类错的临床效果  

The combined effects of maxillary protraction and stopping loop in treatment of Class Ⅲ malocclusion with maxillary retrusion in mixed dentition

作　　者：潘锡红[1] 

机构地区：[1]广西医科大学附属口腔医院正畸科,广西南宁530021

出　　处：《中国美容医学》2009年第8期1160-1162,共3页Chinese Journal of Aesthetic Medicine

摘　　要：目的:探讨在混合牙列期既能矫治轻、中度上颌后缩导致的I I I类错,又可防止下前牙产生不必要的舌向移动的方法。方法:采用2×4矫治器,上颌加用Nance腭托,进行上颌前牵引,口内使用III类牵引。在下前牙达到预定的位置后,更换下颌弓丝,弓丝上于双侧下第一恒磨牙带环颊面管前方弯阻挡曲,防止下前牙在挂III类牵引时继续舌向移动。对治疗前后的头颅侧位片进行分析。结果:治疗结束,前牙反解除。头影测量分析显示:与治疗前相比,矫治后SNA角、S-Pt m距、A-Pt m距、ANB角明显增加,U6-Pt m距增大;治疗还引起前牙唇倾度的变化,但与第二次头颅侧位片相比较,治疗结束时L1-Mp角的改变无统计学意义。结论:矫治轻、中度上颌后缩的混合牙列期III类错时,上颌前牵引加III类牵引是有效的方法;于下第一恒磨牙带环颊面管前方弯制阻挡曲,可防止下前牙过度舌向移动。Objective To investigate a simple and applicable method in treatment of Class Ⅲ malocclusion in mixed dentition. Methods Night patients aged from 9-10.5 with Class Ⅲ malocclusion and moderate maxillary retrusion were selected. Treatment involved included 2×4 edgewise appliance and maxillary protraction. We bent stop- loop to prevent lower incisors being inclined lingually excessly in us A-Ptm,ANB,U6-Ptm increased.There was no difference in edgewise appliance and maxillary protraction combined ng Class Ⅲ elastics. Results After treatment. SNA,S-Ptm, L1-Mp after using stop-loop. Conclusion The use of 2×4 with stop-loop is effective in the treatment of Class Ⅲ malocclusion with maxillary retrusion in mixed dentition.

关 键 词：混合牙列期 Ⅲ类错[牙合] 上颌前牵引 Ⅲ类牵引 阻挡曲 

分 类 号：R783.5[医药卫生—口腔医学]