不同基底材料烤瓷冠抗压缩破坏力的对比研究  

Comparative study on the compressive strength of porcelain crown with different base materials

作　　者：吴洁[1] 陈志宇[1] 仇亚非[1] 李宁[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》2015年第5期607-610,共4页Journal of Practical Stomatology

基　　金：河北省科技支撑计划项目(编号:13277766D);河北省卫生厅医学科学研究重点课题(编号:20090052)

摘　　要：目的:比较钴铬烤瓷冠、CAD/CAM纯钛切削烤瓷冠和CAD/CAM氧化锆全瓷冠的抗压缩破坏力。方法:用金属代型模拟前磨牙预备体,扫描代型获取数字化模型数据,通过计算机辅助设计制作系统,制作尺寸一致的钴铬基底冠、CAD/CAM纯钛切削基底冠和CAD/CAM氧化锆基底冠试件各5个,分别设定为A、B、C 3组,各组基底冠分别按产品说明涂塑烧结遮色瓷与体瓷,控制各试件厚度一致。在万能材料测试机上检测试件抗压缩破坏力值。采用SPSS 13.0统计分析软件对数据进行统计分析,用扫描电镜观察基底材料与遮色瓷结合界面微观结构。结果:A、B、C 3组试件抗压缩破坏试验力值(N)依次为2 990±188、2 305±157、2 150±131。A与B、A与C组比较P<0.05,B与C组比较P>0.05。结论:3种材料烤瓷冠的抗压缩破坏力均可满足临床需要。钴铬烤瓷冠的抗压缩破坏力值大于CAD/CAM纯钛切削烤瓷冠和CAD/CAM氧化锆全瓷冠。Objective：To compare the compressive strength of porcelain crown with Co-Cr,CAD/CAMpure titanium and CAD/CAM zirconia respectively.Methods：Metal models of simulating crown core of the ideal premolar were manufactured,digital data of the met-al model were obtained by CAD/CAMsystem,the basement crowns of Co-Cr,CAD/CAMpure titanium and CAD/CAMzirconia were respectively made（n =5）,size of each crown was kept the same and the spcimens were set as group A,B and C respectively.Then masking porcelain and body porcelain were fired on basement crowns according to the instructions.The thickness of the porcelain was kept the same.All of the porcelain crowns were located on the Instron testing machine,the compression strength force values were measured.Data were statistically analysed by SPSS 1 3.0 software.The bonding surface of basement material and porcelain was observed by SEMafter compressive failure.Results：The compressive strength（N）of group A,B and C was 2 990 ±1 88,2 305 ±1 57,2 1 50 ± 1 31 ,A vs B or C,P 〈0.05,B vs C,P 〉0.05.Conclusion：All the 3 base materials with porcelain crown satisfy the clinical require-ments.The compressive strength of Co-Cr porcelain crown is stronger than that of CAD/CAMpure titanium porcelain crown and CAD/CAMzirconia porcelain crown.

关 键 词：钴铬 纯钛 氧化锆 烤瓷冠 抗压缩破坏力 

分 类 号：R783.1[医药卫生—口腔医学]