不同全冠修复体边缘适合性的比较  

Evaluation of Marginal Fitness of Four Different Full Crowns

作　　者：张佳男[1] 卢海平[1] 黄海蓉[1] 冯剑颖[1] 李蓉[2] 

机构地区：[1]浙江中医药大学口腔医学院修复科,浙江杭州310053 [2]武汉大学口腔医学院口腔修复科

出　　处：《口腔医学研究》2014年第11期1055-1057,共3页Journal of Oral Science Research

基　　金：2013年浙江省大学生科技创新活动计划(2013R410007)

摘　　要：目的:比较钴铬合金冠、钴铬烤瓷冠、铸瓷全冠和氧化锆全瓷冠的边缘适合性。方法:选取正畸拔除的第一前磨牙24颗,随机分成A:钴铬合金、B:钴铬烤瓷、C:铸瓷、D:氧化锆全冠共4组,常规备牙、印模后分别制作修复体,玻璃离子粘固后在体式显微镜下放大40倍测量修复体边缘在垂直和水平方向上与牙体组织边缘之间的间隙宽度,用SPSS11.5进行统计分析。结果:水浴前A、B、C、D组平均边缘垂直间隙宽度分别为(82.5±13.3)、(66.3±9.2)、(44.7±5.8)和(45.8±18.3)μm,除C组与D组间差异无统计学意义外,其他各组间差异均有统计学意义(P<0.01);水浴后宽度分别为(101.8±9.5)、(80.1±9.8)、(52.8±6.6)和(53.0±8.1)μm,除C组与D组间差异无统计学意义外,其他各组间差异也均有统计学意义(P<0.001)。比较同组水浴前后A、B、C组有统计学差异,D组无统计学差异。样本颊舌向剖开后测得A、B、C、D组剖面冠边缘水平间隙宽度分别为(103.0±17.8)、(90.9±19.9)、(72.8±11.0)和(73.8±9.3)μm,除A组与C组、A组与D组间差异有统计学意义外,其他各组间差异均无统计学意义。结论:铸瓷和氧化锆全瓷冠的边缘适合性优于钴铬合金冠和钴铬烤瓷冠。Objectives： To evaluate the marginal fitness of Co - Cr alloy, Co - Cr PFM, IPS E. Max and Cercon CAD/CAM zirconia dioxide crowns. Methods： Total of 24 orthodontic- extracted bicuspids were selected and were divided into 4 groups randomly, group A： Co- Cr alloy, group B： Co-Cr PFM, group C： IPS E. Max, group D： Cercon CAD/CAM zirconium. Routine tooth preparation and impression were conducted by one doctor and four types of crown were produced by Lab. After cemented with glass-ionomer , the vertical gaps between crowns and teeth at the margins of crowns were measured before and after water bath under stereornicroscope（× 40）, the horizontal gaps were measured after sagittal cutting buccal-lingually. SPSS11. 5 software was used to determine the differences between the four groups. Results： The mean marginal gaps before thermal cycle were group A： （82. 5 ± 13.3） μm; group B： （66. 3±9. 2） μm; group C： （44. 7± 5.8） μm; group D： （45.8 ± 18.3） μm. The mean marginal gaps after thermal cycle were group A： （101. 8±9. 5）μm; group B： （80. 1±9. 8）μm; group C： （52. 8±6. 6）μm; group D： （53. 0 ± 8. 1）μm. The mean horizontal marginal gaps between crowns and teeth after cutting were： group A,（103. 0±17. 8）μm; group B,（90. 9±19. 9）μm; group C,（72. 8±11.0）μm; group D,（73. 8±9. 3）μm. Conclusion： The marginal fitness of E. Max and zirconium dioxide crowns were better than that of Co-Cr alloy and Co-Cr PFM crowns.

关 键 词：金属冠 烤瓷冠 全瓷冠 边缘适合性 

分 类 号：R783.1[医药卫生—口腔医学]