摘要
目的探讨通过含SiO2-ZrO2的内包埋材料改性铸钛表面,来增强钛-瓷结合强度的可行性。方法将含有SiO2和ZrO2的内包埋材料用经盐酸酸化的正硅酸乙酯调试成稀糊状,涂在蜡型将要烤瓷一侧,铸造完成的试样为实验组;对照组为未涂覆内包埋材料的蜡型,铸造完成的试样表面进行喷砂处理。分别对铸造体表面进行扫描电镜及X线衍射分析。按ISO 9693标准制备钛-瓷试样,用三点弯曲试验测定其结合强度;BSEM观察钛-瓷结合界面。实验数据进行统计学分析。结果实验组铸造体表面可见Ti5Si3、SiO2和ZrO2存在,钛-瓷结合强度为41.49MPa,与对照组的差异有显著统计意义(P<0.05)。实验组钛-瓷结合的界面紧密均匀,而对照组钛瓷界面见明显氧化层。结论使用含SiO2和ZrO2的内包埋材料通过铸造方法形成的SiO2-ZrO2中间层可提高钛-瓷结合强度。
Objective To investigate the effect of SiO2- ZrO2modifieation on the bonding strength of Ti- porcelain. Methods Inner investment materials containing SiO2 and ZrO2 were prepared by mixing SiO2 and ZrO2 with tetraethoxy silane, and acidification liquid was added as a catalyst. Wax patterns were coated with inner investment materials, the patterns without coating were used as control. Casting surfaces were analyzed with scanning electronic microscopy and X-ray diffraction （SEM/XRD）, while Ti-poreelain interfaces were characterized using Backscattered Electron Imaging （BEI）. Metal-ceramic specimens were tested in three point bending according to the protocol of ISO 9693- 1999. Results In experimental group, Ti-porcelain had a compacted interface and SiO2, ZrO2and Ti5Si3 phases were found. The bond strength of experimental group was significantly higher than that of control group （ P 〈 0. 05 ）. Conclusion SiO,- ZrO2 surface modification through cast method nan significantly improve Ti-porcelain bond strength.
出处
《北京口腔医学》
CAS
2013年第2期74-77,共4页
Beijing Journal of Stomatology
基金
国家自然科学基金(30872909)
关键词
铸造
表面改性
钛-瓷结合强度
Casting
Surface modification
Ti-ceramics Bond strength
