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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 and analyze the bonding strength between Vita Mark II and two all-ceramic systems. Methods: Twenty Vita Mark II specimens were cut into 8 mm × 6 mm × 2 mm specimens and randomly divided into two groups (n = 10). The specimens were sintered on their surface with VM9 and Titankeramik, respectively. The shear bond strength and scanning electron microscope (SEM) were used to observe the morphology and conformation of the interface, and the thermal field emission scanning electron microscope (FE-SEM) was used to qualitatively analyze the bonding interface. Results: The shear strength (MPa) of VM9 group and Titankeramik group were 36.92 ± 7.6 and 41.02 ± 9.40, respectively (P> 0.05) Materials in the interface area and Mark II mosaic mosaic inlay, combined with close without gaps. FE-SEM analysis showed that the mass fraction of Al element in the interface zone changed gradually, and the mass fraction of Al from the base porcelain to the veneering porcelain decreased gradually, suggesting that Al in the base porcelain interpenetrates through the interface. Conclusion: The binding strength between VM9 and Titankeramik porcelain and Vita mark II can meet the clinical needs.