采用二氧化锡系微晶玻璃制备低熔钛专用遮色瓷,研究了遮色瓷组成与热膨胀系数的关系,通过对比烧结温度、力学性能与热膨胀系数等性能,最终确定遮色瓷配方和烧结工艺;采用XRD、SEM、细胞毒性和溶血实验分别研究了钛遮色瓷的晶相组成、显微形貌和生物相容性。结果表明所研制的遮色瓷为含有锡石晶体相的微晶玻璃;其最佳烧结温度为780℃;在25～350℃,其平均线热膨胀系数为8.9×10-6/℃;所研制的钛遮色瓷细胞毒性为0级,不引起溶血反应,具有良好的生物相容性。
The titanium opaque porcelain was synthesized through normal melting-derived route using SnO2 glass-ceramic system.The porcelain was characterized by thermal expansion,X-ray diffraction and cytotoxicity tests.The results of XRD showed that the main crystal phase of the opaque porcelain was SnO2.Its＇ average coefficient of thermal expansion（α25-350） was 8.9×10-6/℃,which was lower than that of bonding porcelain（9.2×10-6/℃） and pure titanium（9.5×10-6/℃）.The optimal fusion temperature was 780℃.The methyl thiazolyl tetrazolium assay results demonstrated that the cytotoxicity of the titanium porcelain was ranked as 0.At the same time,the titanium porcelain did not result in hemolysis.It was believed that the titanium opaque porcelain synthesized in this research was a biocompatible material and could be used for dental implant materials.
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