Vita Mark Ⅱ与饰瓷结合强度的比较与分析  

Study on the shearing bond strength between Vita Mark II and two kinds of veneering ceramics

作　　者：洪延青[1] 宓勇 姜涛[2] 

机构地区：[1]济南市口腔医院修复工艺科,250001 [2]济南市口腔医院综合科,250001

出　　处：《实用口腔医学杂志》2014年第2期169-172,共4页Journal of Practical Stomatology

基　　金：济南市科技计划项目(编号:201101103)

摘　　要：目的:比较和分析Vita Mark II与2种全瓷系统饰瓷的结合强度。方法:将Vita Mark II瓷块切割成8 mm×6 mm×2 mm试件20个,随机分成2组(n=10),分别在其表面烧结饰瓷VM9和Titankeramik,用万能试验机测定剪切强度,扫描电镜(SEM)观察结合界面的形貌和构象,热场发射扫描电镜(FE-SEM)对结合界面进行元素定性分析。结果:VM9组和Titankeramik组剪切强度(MPa)分别为:36.92±7.6和41.02±9.40(P>0.05);各组试件破坏模式均以基底瓷破坏为主,SEM观察显示2种饰瓷材料在界面区与Mark II瓷块镶嵌融合,结合紧密无间隙。FE-SEM分析表明界面区Al元素质量分数呈梯度变化,由基底瓷向饰面瓷Al的质量分数逐渐下降,提示基底瓷中Al有越过界面相互渗透的现象。结论:VM9和Titankeramik饰瓷与Vita mark II的结合强度均能满足临床需要。Objective：To compare the shear bonding strength between two kinds of veneering ceramics respectively bonded to Vita Mark II.Methods：Vita Mark II samples were prepaired in the size of 8 mm ×6 mm ×2 mm.Veneering ceramic VM9 and Titankeram-ik were sintered on the Vita Mark II blocks respectively（n =1 0）.The shear bond strength of each specimen was measured,the failure mode of the fracture surface was observed by SEM.The element in the bonding interface was analysed by field emission scanning elec-tron microscope（FE-SEM）.Results：The values of shear bond strength （MPa）of VM9 and Titankeramik groups were 36.1 7 ±8.91 and 42.07 ±8.31 respectively（P 〉0.05）.SEM observation showed tight bond between the two materials,FE-SEM results showed penetration of Al element from MarkⅡblock into veneering porcelain VM9 or Titankeramik.Conclusion：Veneered porcelain of VM9 and Titankeramik can be used as the individual veneering ceramics for Vita Mark II blocs.

关 键 词：VITA MARK II 饰瓷 剪切强度 

分 类 号：R783.1[医药卫生—口腔医学]