摘要
目的用PAR指数评价骨性Ⅲ类错畸形非拔牙矫治及不同拔牙方式的治疗效果,探讨影响正畸治疗效果的相关因素。方法收集治疗完成的骨性Ⅲ类错畸形的患者152例,通过PAR指数的评价分析非拔牙矫治、拔前磨牙矫治、拔磨牙矫治、拔下切牙矫治对治疗效果的影响。结果拔前磨牙组和拔磨牙组极大改善程度分别为95.92%和93.75%,非拔牙组和拔下切牙组极大改善程度分别82.98%和75.00%。结论 (1)拔前磨牙矫治比非拔牙矫治取得了更大的改善程度,尤其在牙齿排列和中线调整方面显示了充分的优势。(2)减数下切牙的拔牙模式应慎重使用,在确认拔除一个下切牙可以使Bolton指数接近或达到正常范围时,可选择该治疗模式。
Objective The treatment effect is evaluated by PAR index about the bone malocclusion of the class Ⅲ by nonextraction treatment and different extraction ways. The orthodontic result affected by the related factors will be discussed. Methods： 152 orthodontic cases already finished are collected. The treatment effect is evaluated and analyzed by PAR index about different ways by non-extraction, premolars extracted, molars extracted, and mandibular incisors extracted. Results The each group data is 95.92% and 93.75%. The percentage improved by nonextracting group and mandibular incisors extracted group is respectively 82.98% and 75.00%. Conclusion：（1） Orthodontic treatment by premolars extracted has better improvement degree than by non-extraction, particularly demonstrating a full advantage in teeth array and midline adjustment. （2）The model by extracting mandibular incisors should be used cautiously. It shouldn＇t be chosen unless it can be confirmed that extracting a mandibular incisor will make Bolton index reach or near the normal range.
出处
《医学研究与教育》
CAS
2012年第1期31-35,共5页
Medical Research and Education
基金
保定市科技局2007年保定市科学技术与发展指导计划项目(07ZF030)
