不同工艺制作钴铬合金基底冠适合性的实验研究  

An experimental study on the fit of Co-Cr basal crowns fabricated by different technology

作　　者：李美康[1] 沈文静[1] 吴洁[1] 郭长军[1] 

机构地区：[1]河北医科大学口腔医学院.河北省口腔医学重点实验室,石家庄050017

出　　处：《实用口腔医学杂志》2016年第6期763-766,共4页Journal of Practical Stomatology

基　　金：河北省科技支撑计划项目(编号:13277766D)

摘　　要：目的:对比3种不同工艺制作的钴铬合金基底冠适合性。方法:制作18个树脂代型,随机分为A、B、C 3组,分别采用传统铸造技术、CAD/CAM技术、直接金属激光烧结技术制作钴铬合金基底冠各6个。将基底冠粘固于对应的树脂代型上并包埋片切。测量钴铬合金基底冠边缘及内部粘固剂的厚度。对实验数据进行统计学分析。结果:3组试件边缘间隙分别为A组(66.08±3.90)μm,B组(29.21±3.31)μm,C组(24.96±2.99)μm(P<0.01);3组试件内部间隙分别为A组(114.10±27.66)μm,B组(73.69±31.31)μm,C组(79.89±33.63)μm(A组与B或C组比较,P<0.01,B组与C组比较,P>0.05)。结论:直接金属激光烧结技术制作的钴铬合金基底冠具有更好的边缘适合性;CAD/CAM技术及直接金属激光烧结技术制作的钴铬合金基底冠具有良好的内部适合性。3种技术制作的基底冠边缘及内部适合性均在临床允许范围内。Objective： To compare the fit of Co-Cr basal crowns fabricated by three kinds of technology. Methods： 18 laser cured resin dies were divided into A, B and C groups （ n = 6） randomly. Co- Cr basal crowns of group A, B and C were made by traditional casting technology, CAD/CAM cutting metal technology and direct metal laser sintering technology （DMLS） respectively. The crowns were cemented to the eorresponding dies and the basal crowns and dies were embedded in methyl acrylic. The thickness of the cement layer of the samples was measured under a stero microscope. Data were analyzed with SPSS13.0 statistical software. Resdts： Marginal gap of group A, B and C was （66.08 ~3.90） μm, （29.21 ＋3.31） μm and （24.96 ~2.99） μm respectively（P 〈0.01）. Internal gap of group A, B and C was （ 114.10 ~ 27.66）μ.m, （73.69 ~ 31.31 ）μm and （79.89 ~ 33.63 ） μm respectively （ A vs B or C, P 〈 0.01, B vs C, P 〉0.05）. Conclusion： DMLS technology may make the best marginal fit, CAD/CAM and DMLS technology may pro- duce better internal fit. The marginal fit and the internal fit of the crowns prepared by the 3 methods can meet the clinical requirements.

关 键 词：铸造技术 CAD/CAM技术 直接金属激光烧结技术 钴铬合金基底冠 边缘适合性 内部适合性 

分 类 号：R783[医药卫生—口腔医学]