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Application of Dental Magnifier in the Study of Labial Marginal Fit of PFM Crown.
Author(s): GAO Hai, CHENG Xiang-rong, JIANG Li-yi
Pages: 84-
86
Year: 2009
Issue:
1
Journal: Journal of Oral Science Research
Keyword: 放大镜; 牙体预备; 边缘适合性; 金瓷冠;
Abstract: 目的:本研究旨在探讨牙科放大镜辅助临床牙体预备后对金瓷冠唇侧龈边缘适合性的影响.方法:随机选择20位待拔除双侧上颌第一前磨牙的正畸患者共40颗牙分成两组.实验组:配戴牙科放大镜预备右侧上颌第一前磨牙;对照组:常规预备左侧上颌第一前磨牙.硅胶取模后拔除并保存、制作金瓷冠、在离体牙上试戴、粘固、沿牙体长轴片切.在光学体式显微镜和扫描电镜下测量唇侧龈边缘差异值后统计学分析.结果:实验组金瓷冠唇侧垂直边缘差异值和绝对边缘差异值明显小于对照组,有显著性差异(P<0.01).实验组金瓷冠唇侧水平边缘差异值与对照组比较,无显著性差异(P>0.05).结论:牙科放大镜辅助临床牙体预备对提高金瓷冠唇侧龈边缘适合性是有效的.
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