正常牙尖交错位咬合接触的计算机图像分析  

Occlusal contacts in the intercuspal position studied with computer aided video system.

作　　者：陈一怀 王惠芸[2] 马轩祥 冯庆辉 于龙 

机构地区：[1]长春解放军461医院口腔科,130021 [2]西安第四军医大学口腔医学院

出　　处：《实用口腔医学杂志》2000年第5期398-401,共4页Journal of Practical Stomatology

摘　　要：目的 :研究正常牙合牙尖交错位咬合接触的基本规律。方法 :采集 35名正常牙合受试者牙尖交错位硅橡胶牙合记录 ,计算机图像分析系统定量测量。结果 :75 .0 %的前牙有 80 μm牙合间距离 ,仅 3.3%的前牙接触。后牙区牙合接触数为 71.4± 7.4,磨牙区占 70 %以上 ,以第一磨牙最多。牙合接触人群左右两侧无明显差异 ,其中仅 4人一侧牙合接触数目超过总数 6 0 %。 86 .1%的后牙牙合接触为稳定型 ,9.6 %为不稳定型 ,4.3%没有接触 (均为前磨牙 )。结论 :前牙不接触 。objective:To ivestigate occlusal contacts of normal occlusion in the intercuspal position.Methods:Occlusal contacts in the intercuspal position of 35 subjects with normal intact dentition were recorded with silicone impression and were examined with computer aided video analysis system.Results:there was 80 μm interocclusal distance between 75.0% upper and lower anterior teeth.The average number of occlusal contacts on the posterior segments (upper and lower jaws) was 71.4±7.4,70% of those were on molars.As a whole,there was no significant difference between right and left side. In 4 individuls contact number on one side was more than 60% of that on both sides.Contacts on 86.1% posterior teeth were stable type and 9.6% unstable.Conclusion:A small interocclusal distance between the upper and lower anterior teeth can prevent anterior teeth from displacement under clenching.

关 键 词：牙尖交错位 He牙 咬合接触 计算机图像分析 

分 类 号：R782[医药卫生—口腔医学]