拔牙和不拔牙矫治对牙弓宽度影响的研究  

The effect of teeth extraction and nonextraction on odontoasch width

作　　者：吕超贤[1] 王晓霞[1] 孙莹玉[1] 

机构地区：[1]中日友好医院口腔科,北京100029

出　　处：《中日友好医院学报》2004年第4期220-222,共3页Journal of China-Japan Friendship Hospital

基　　金：中日友好医院科研基金资助课题

摘　　要：目的 :对 2 5例拔牙 (4个第一前磨牙 )患者和 2 5例不拔牙患者正畸治疗前后的研究模型的上颌和下颌的前牙弓和后牙弓的宽度进行测量 ,以检验拔牙矫治是否会导致牙弓的狭窄 ,并进而影响其美学效果。方法 :在尖牙和磨牙区唇颊面的最突出的位置进行牙弓宽度测量 ,将尖牙间和磨牙间的宽度测量数据 ,进行统计分析。结果 :在两组病例中 ,下颌尖牙间和磨牙间的宽度相同 ,在拔牙病例中尖牙间宽度比不拔牙宽度多 0 .93mm(P<0 .0 1)。结论 :拔牙矫治与不拔牙矫治相比 。Objective:In this study we have measured the anterior and posterior arch widths of the maxillary and mandibular arches in 25 patients treated by 4 first-premolar extraction and 25 patients treated without extractions on posttreatment study models and compared statistically to determine whether the dental arches were narrower after extraction treatment,and result in less esthetic results because of narrowing of the dental arches. Methods:Measurements were made in the canine and the molar regions from the most labial aspect of the buccal surfaces of the canines and the molars, The measurements were compared statistically.Resuts:In both groups, anterior and posterior arch widths were the same except for the mandibular intercanine dimension, which was 0.93 mm larger (P<0.01) in the extraction group.Conclusion:The extraction treatment does not result in narrower dental arches than nonextraction treatment.

关 键 词：牙弓宽度 拔牙矫治 不拔牙矫治 正畸治疗 

分 类 号：R783.5[医药卫生—口腔医学]