摘要
目的:评价正畸螺旋缩弓器和MBT直丝弓矫治技术治疗单侧正锁后上颌牙弓宽度、前牙覆和覆盖的长期变化。方法:对23名(男13,女10)经正畸治疗后的患者4个阶段(治疗前,T1;螺旋缩弓后,T2;MBT治疗后,T3和去除保持器后2年,T4)的模型进行测量分析。结果:缩弓后上颌牙弓宽度明显减小(P<0.05)。MBT治疗后尖牙宽度复发明显(P<0.05)。停戴保持器2年后,尖牙宽度、第一前磨牙宽度、第一磨牙宽度、前牙覆和覆盖分别净减小(1.2±0.96)mm,(3.9±1.19)mm,(4.6±0.23)mm,(1.8±0.42)mm,(0.8±0.13)mm。结论:单侧正锁经正畸螺旋缩弓器和MBT直丝弓矫治技术治疗后上颌牙弓宽度稳定。
Objective： To evaluate the long--term changes of unilateral scissors--bite in maxillary arch widths, overjet, and overbite in patients who were treated with orthodontic screw contraction appliance （OSCA） followed by MBT appliances. Methods： The material for the study consisted of study casts taken from 23 patient （13 males, 10 females） on four different occasions （before treatment, T1; after OSCA, T2; after treatment,T3; and 2 years later after stopping retainer）. The upper intercanine, interpremolar, and intermolar widths and overjet and overbite were measured on each set of study casts. Results： The net decrease in intercanine width, interpremolar width, intermo- lar width, overjet, and overbite was （1.2~0.96） mm, （3.9~1.19） mm, （4.6~0.23） ram, （1.8~0.42） ram, （0.8~0.13） mm, respectively. The relapse in intercanine width was obvious （P〈0.05） at the end of the follow-- up period. The intercanine width relapsed significantly. Conclusion： Maxillary arch widths, overjet, and overbite of unilateral scissors--bite were stable after being treated OSCA followed by MBT appliances.
出处
《口腔医学研究》
CAS
CSCD
2012年第11期1190-1192,共3页
Journal of Oral Science Research
关键词
单侧锁
正畸螺旋缩弓器
长期稳定性
Unilateral Scissors--bite Orthodontic Screw Contraction Appliance （OSCA） Long. term Stabilityof OSCA
