[CAD/CAM全瓷基底冠咬合面设计方法的研究]
[Study on the occlusal surface design methods of CAD/CAM all-ceramic coping crown].
作者信息
Wang Hua-rong, Zhao Yun-feng, Zhang Fei-min
机构信息
Department of Prosthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
出版信息
Sichuan Da Xue Xue Bao Yi Xue Ban. 2004 Mar;35(2):280-2.
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.
目的
评估Cerec2计算机辅助设计/计算机辅助制作（CAD/CAM）全瓷冠桥颌面设计方法的准确性。
方法
制备10个第一磨牙全瓷冠。其中5个为正常咬合，5个为异常咬合。对每个预备体采用三种方法，即外推法、关联法和功能法，通过Cerec 2 CAD/CAM进行冠桥设计。记录边缘嵴处近中颊侧、近中舌侧、远中颊侧、远中舌侧角的Z值。
结果
在正常咬合组中，三种颌面设计方法之间无统计学差异（P>0.05）。在异常咬合组中，颌面设计方法之间存在统计学差异（P<0.05）；功能法比其他方法更准确。
结论
结果表明，外推法可应用于正常咬合患者，功能法可应用于异常咬合患者。
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