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目的:研究RF氧化锆全瓷材料中所含放射性元素。方法:利用电感耦合等离子体质谱仪ICP-MS对三种氧化锆陶瓷(RF型氧化锆,Emax氧化锆,VITA氧化锆)瓷块材料中Pb、Th、U等放射性元素的含量进行检测。结果:三种氧化锆全瓷材料中都含有一定量的微量元素,放射性元素含量极少,RF型氧化锆Pb、Th、U含量分别为0.52×10-6μg、0.63×10-6μg、0.50×10-6μg;Emax氧化锆Pb、Th、U含量分别为0.23×10-6μg、0.09×10-6μg、0.07×10-6μg;VITA氧化锆Pb、Th、U含量分别为0.18×10-6μg、0.10×10-6μg、0.18×10-6μg。三种材料放射性元素含量无显著性差异(P>0.05)。结论:RF型氧化锆全瓷材料符合材料放射限量标准(Gb6566-2001)可以作为临床口腔全瓷材料使用。
Objective: To study the radioactive elements contained in RF zirconia ceramic materials. Methods: The content of Pb, Th, U and other radioactive elements in three kinds of zirconia ceramics (RF zirconia, Emax zirconia and VITA zirconia) were determined by inductively coupled plasma mass spectrometry ICP-MS. Results: The three kinds of zirconia all-ceramic materials contained a certain amount of trace elements with very few radioactive elements. The contents of Pb, Th and U of RF zirconia were 0.52 × 10-6μg, 0.63 × 10-6μg and 0.50 × 10-6μg; the contents of Pb, Th and U of Emax zirconia are respectively 0.23 × 10-6μg, 0.09 × 10-6μg and 0.07 × 10-6μg; the contents of Pb, Th, U of VITA zirconia are 0.18 × 10-6μg, 0.10 × 10-6 μg, 0.18 × 10-6 μg. There was no significant difference in the content of radioactive elements among the three materials (P> 0.05). Conclusion: RF zirconia all-ceramic materials meet the material emission limits (Gb6566-2001) can be used as clinical oral all-ceramic materials.