摘要
目的:探讨重度拥挤伴尖牙近中唇移过低位病人拔除4个第一前磨牙后,早期用节段正轴辅弓远中、牙合向移动尖牙,结合直丝弓矫治器的矫治疗效,为临床应用提供依据。方法:对12例(共24个尖牙)前牙拥挤和伴有尖牙近中唇移过低位的病例,在拔除第一前磨牙1周后应用自行弯制的节段正轴辅弓牵引尖牙远中、牙合向移动,同时观察尖牙、磨牙的移动情况和临床效果。结果:经过早期使用节段正轴辅弓,尖牙5个月平均向远中移动5.2 mm(速率1.04 mm/月),牙合向移动5个月平均3.8 mm(速率0.76 mm/月)。通过后期的MBT直丝弓矫治器,12例病人覆牙合、覆盖正常,尖牙和第一磨牙达到理想的中性咬合关系,上下颌牙齿尖窝交错,咬合关系良好,尖牙轴倾度正常,支抗磨牙无明显移动。结论:早期应用节段正轴辅弓和后期直丝弓矫治器,进行拥挤伴尖牙近中唇移过低位的拔牙矫治,不失为一种有效的治疗新方法。
AIM： To observe the clinical effects of canine distal removement by segmented dental arches. METHODS： Twelve cases （24 canines） of severely crowded dentation patients were chosen. After extraction of the first premolars, specially bended segmented dental arches were applied to move the canines distally. Overjet and overbite, interdigitation for posterial molars as well as canines and anchorage molars moving situations were observed. RESULTS：After 5 months, canines were moved 5.2mm （ 1.04mm/per month） distally and 3.8mm （0.76mm/per month） ocelusally by segmented dental arches. MBT straight wire appliance was used for the later stage treatment. After MBT treatment, normal jet and normal bite were achieved. Canines and first molars reached interdigitation relationship. There was no shift in anchorage molars. CONCLUSION： Early stage usage of special segmented dental arches to move canines distally and later stage usage of MBT straight wire appliance are effeetive on the orthodontic treatment of severely crowded dentition.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2011年第6期349-351,共3页
Chinese Journal of Conservative Dentistry
关键词
节段正轴辅弓
远中移动尖牙
牙列重度拥挤
segmented dental arches
canine distalization
severe dental crowding
