CAD/CAM全瓷冠面设计方法的比较  

Study on the Occlusal Surface Design Methods of CAD/CAM All-ceramic Coping Crown.

作　　者：王华蓉[1] 赵云凤[1] 章非敏[2] 

机构地区：[1]四川大学华西口腔医学院口腔修复学教研室,成都610041 [2]南京医科大学口腔医学院修复科

出　　处：《四川大学学报（医学版）》2004年第2期280-282,共3页Journal of Sichuan University(Medical Sciences)

基　　金：国家自然科学基金 (批准号 3 9970 799)资助

摘　　要：目的　研究 Cerec 2 CAD/ CAM全瓷冠牙合面设计方法的准确性 ,为 CAD/ CAM的临床应用提供依据。方法　收集第一磨牙需制作全瓷冠修复的患者 ,分为正常咬合组和异常咬合组。用 Cerec 2 CAD/ CAM机为每一患牙采用推断法、功能法和相关法三种方法进行全冠牙合面设计 ,分别记录牙合面边缘嵴近颊、近舌、远颊、远舌四个轴角处的 Z值 (代表牙合龈向的高度 )。结果　咬合关系正常组 ,三种牙合面设计方法无统计学差异 (P>0 .0 5 ) ;咬合关系异常组 ,推断法、相关法与功能法有统计学差异 (P<0 .0 5 ) ,功能法牙合面设计高度值较低 ,较精确。结论　正常咬合关系患者可采用推断法进行全瓷冠牙合面设计 。Objective To evaluate the accuracy of occlusal surface design methods for Cerec2 CAD/CAM all-ceramic coping crown. Methods Ten first molar all-ceramic crown preparations were made. Five were normal occlusion, and five were abnormal. The crown was designed by Cerec 2 CAD/CAM using three methods, namely Extrapolation, Correlation and Function, for every preparation. The Z values of mesiobuccal, mesiolingual, distobuccal, distolingual angle in marginal ridge were recorded. Results In the normal occlusion group, there was no statistical difference among the three occlusal surface design methods (P>0.05). In the abnormal occlusion group, there were statistical differences between the occlusal surface design methods(P<0.05); the function method was noted to be more accurate than the others. Conclusion The results indicate that the extrapolation method can be applied to patients with normal occlusion and the function method can be applied to patients with abnormal occlusion.

关 键 词：计算机辅助设计/计算机辅助制作 全瓷底层冠 he面设计方法 

分 类 号：R783.3[医药卫生—口腔医学]