采用硼硅酸盐玻璃体系制备低熔钛专用体瓷,研究了体瓷组成与热膨胀系数的关系,并采用XRD和细胞毒性实验分别研究了钛体瓷的晶相组成和生物相容性。结果表明,钛体瓷为不含晶体的均质玻璃体,其热膨胀系数随SiO2含量的增加而减小;通过对比两种配方的烧结温度与力学性能,最终确定体瓷配方和烧结工艺：自制钛体瓷的烧结温度为760℃,抗弯强度、断裂韧性和维氏硬度分别为（85±4.07）MPa、（1.44±0.04）MPa/m1/2和（3904±21.71）MPa/mm2,硬度稍高于天然牙釉质。XRD结果表明自制钛体瓷为不含晶体的均质玻璃体;细胞毒性为0级,对细胞无抑制作用,可望进一步应用于临床修复。
The titanium dentin porcelain was synthesized through normal melting-derived route using borate-silicate system.The porcelain was characterized by thermal expansion,X-ray diffraction and cytotoxicity tests.The thermal expansion coefficient of dentin porcelains decreased with the increasing concentration of SiO2.The effects of sintering temperature on mechanical properties of titanium dentin porcelain were studied.Three-point bending strength,fracture toughness and vickers hardness obtained at 760℃ were（85±4.07）MPa,（1.44±0.04）MPa/m1/2 and（3940±21.71）MPa,respectively.The results of X-ray diffraction showed that the dentin porcelain is homogeneous vitreous and without crystalloids.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 was compatible to cells.The titanium dentin porcelain synthesized in this research could be used for dental implant materials.
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