| 翁蓓军,黄伟昊,李国强.CAD/CAM全瓷冠与激光熔覆烤瓷冠边缘适合性的研究[J].口腔材料器械杂志,2014,23(4):185-188. |
| CAD/CAM全瓷冠与激光熔覆烤瓷冠边缘适合性的研究 |
| Comparative study of marginal adaptation of crowns by selective laser melting and CAD/CAM methods |
| 投稿时间：2014-03-20 修订日期：2014-06-23 |
| DOI：10.11752/j.kqcl.2014.04.04 |
| 中文关键词: 计算机辅助设计 牙科铸造技术 选择性激光熔覆技术 边缘适合性 |
| 英文关键词:Computer-aided design Dental casting technique Selective laser melting Marginal adaptation |
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| 中文摘要: |
| 目的比较CAD/CAM全瓷冠,选择性激光熔覆技术(selective laser melting,SLM)制作的全冠以及传统工艺铸造冠的边缘适合性差异,以期为临床提供参考依据。方法通过切削技术制作铝合金试件,且翻制前磨牙牙备后树脂试件30件,将试件分为SLM组、CAD/CAM组和铸造组(对照组),分别制作钴铬合金全冠以及全瓷冠,在体视显微镜下观察各冠边缘与试件之间的距离。结果 SLM组的边缘间隙为(46.57±3.14)μm,CAD/CAM组为(45.24±2.25)μm,对照组为(68.54±7.57)μm。SLM组与CAD/CAM组的数据差异没有统计学意义(P>0.05),但两者与对照组的数据差异具有统计学意义(P<0.01)。结论 3种方法制作的全冠适合性均在临床可接受的范围内,但采用SLM技术和CAD/CAM技术制得的全瓷冠其边缘适合性更接近美国牙科协会的标准,值得推广应用。 |
| 英文摘要: |
| Objective The marginal adaptation of crowns fabricated by selective laser melting(SLM) and CAD/CAM methods was investigated to provide an experimental basis for clinic.Methods Co-Cr alloy full crowns fabricated by SLM, Wax-lost-casting and all-ceramic crowns by CAD/CAM were divided into three groups of 10 samples in each group. Distance between each crown's margin and the abutment was recorded at 50 points randomly using a measuring microscope at a magnification of ×100. The results were analyzed with one-way ANOVA and Tukey's multiple comparison test at a significance level of 0.05. Results The gap between SLM crowns and the abutments was(46.57±3.14) μm,(45.24±2.25)μm for CAD/CAM crowns and(68.54±7.57) μm for wax-lost-casting crowns.There were no significant difference between the SLM group and the CAD/CAM group(P>0.05), while there were significant difference between the SLM or the CAD/CAM group and the wax-lost-casting group(P<0.01). Conclusions Co-Cr alloy full crowns fabricated by three methods provided acceptable marginal adaptation in clinic, and the marginal adaptation of SLM and CAD/CAM crowns was closed to America Dental Association standards. It is worthy of clinical popularization and application. |
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