摘要
目的探讨聚合度和隙料厚度对计算机辅助设计与制作(CAD/CAM)全瓷冠边缘适合性的影响。方法聚甲基丙烯酸甲酯(PMMA)树脂代型,分为A组(2°)和B组(4°),每组30个,每组又分3个亚组,每亚组10个,在PMMA树脂代型上制作CAD/CAM全瓷基底冠,隙料厚度设为40μm、60μm和80μm。采用双色硅橡胶印模技术复制全瓷冠的内部间隙,在金相显微镜下采集边缘间隙的图像。用Micro-image Analysis软件测量边缘间隙,将所得数据用SPSS 20.0软件进行分析。结果隙料厚度相同时,2°和4°之间的差异有统计学意义。结论隙料厚度60μm,聚合度4°时,全瓷冠的适合性最好。
Objective To study the influence of the convergence angle and cement space on the fit of CAD/CAM all-ceramic crowns. Methods The PMMA resin was produced in two groups, group A （2 degrees） and group B （4 degrees）, 30 in each group, and each group was divided into 3 sub-groups A1, A2, A3; or B 1, B2, B3. Each subgroup included 10 patients with a CAD/CAM all-ceramic crown with PMMA resin generation type, but the cement space was 40 μm, 60 μm, or 80 μm. The internal clearance edge of the double color silicone rubber impression reproduction technology of the all-ceramic crown was observed under the microscope. Analysis Micro-image software was used to measure the edge gap, and the resulting data were analyzed using SPSS 20.0 software. Results When the cement space is the same, the difference between 2 degrees and 4 degrees was statistically significant. Conclusion The fit is the best when the cement space is 60 μm and the convergence angle space is 4 degrees.
出处
《中国医科大学学报》
CAS
CSCD
北大核心
2017年第10期921-923,共3页
Journal of China Medical University
关键词
全瓷冠
聚合度
隙料厚度
边缘适合性
all-ceramic crown
convergence angle
cement space
marginal fit
