CAJ | 학술논문

目的：应用镍钛圆丝和带状弓丝作用在低位尖牙的拥挤拔牙病例上，研究带状镍钛弓丝对尖牙拥挤病例的牙弓形态和咬合的影响。方法：选择40例骨性Ⅰ类错牙合、上颌尖牙低位拥挤病例。随机分为带状弓丝组和圆丝组，拔除4颗第一前磨牙，应用带状弓丝、圆丝和活动翼矫治技术进行治疗。尖牙排齐后，对治疗前后的记存模型进行分析，观察带状弓丝对牙弓宽度和牙弓长度的影响。结果：带状弓丝组：治疗后上颌尖牙的宽度有所减小，第二前磨牙宽度有所增大，第一磨牙宽度没有变化。上颌切牙和第一磨牙到腭皱的距离均没有变化。圆丝组：治疗后上颌尖牙的宽度有所减小，第二前磨牙和第一磨牙的宽度有所增大。上颌切牙到腭皱的距离增加，第一磨牙到腭皱的距离没有变化。结论：镍钛带状弓丝联合活动翼托槽应用在尖牙低位拥挤的病例上，可以很好的维护后牙固有咬合，稳定牙合平面，控制前牙的突度，减少新畸形的发生，使正畸矫治速度增加，缩短疗程，疗效较好。
목적：응용얼태원사화대상궁사작용재저위첨아적옹제발아병례상，연구대상얼태궁사대첨아옹제병례적아궁형태화교합적영향。방법：선택40례골성Ⅰ류착아합、상합첨아저위옹제병례。수궤분위대상궁사조화원사조，발제4과제일전마아，응용대상궁사、원사화활동익교치기술진행치료。첨아배제후，대치료전후적기존모형진행분석，관찰대상궁사대아궁관도화아궁장도적영향。결과：대상궁사조：치료후상합첨아적관도유소감소，제이전마아관도유소증대，제일마아관도몰유변화。상합절아화제일마아도악추적거리균몰유변화。원사조：치료후상합첨아적관도유소감소，제이전마아화제일마아적관도유소증대。상합절아도악추적거리증가，제일마아도악추적거리몰유변화。결론：얼태대상궁사연합활동익탁조응용재첨아저위옹제적병례상，가이흔호적유호후아고유교합，은정아합평면，공제전아적돌도，감소신기형적발생，사정기교치속도증가，축단료정，료효교호。
Objective Applicating nickel titanium flat and round wire in low fangs extraction crowding cases.Researching the influence of dental arch and the occlusion. Methods 40 cases were divided into flat and round wire groups.they were low fangs crowding cases of class Ⅰ Osseous neutronclusion,extracted four first premolars, treated by nickel titanium flat and round wire and active-wing appliance.low fangs were neaarranged.Study model were analysed before and after treatment. The measurement data had statistical analysis,the effect were observed of dental arch width and length. Results Flat wire group:widths of maxillary canines decreased,The upper second bicuspid increased,The upper molar had no change.The distance maxillary incisor and molar to palatal wrinkle had no change.round wire groups:widths of maxillary canines decreased,the upper second bicuspid and upper molar increased. The distance maxillary incisor to palatal wrinkle increased.the distance molar to palatal wrinkle had no change. Conclusion Nickel titanium flat wire and activewing appliance can treat low fangs extraction crowding cases.That can adjust the morphology of dental arch,preserve the stability of functional occlusal plane,Control the incisor protrusion.reduce the new teratogenesis,decrease the speed of orthodontic treatment,short the period of treatment,Clinical curative effect is good.