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目的:研制6种天然牙颜色匹配的牙科四方多晶氧化锆陶瓷。方法:以稀土氧化物(Pr6O11、CeO2、Er2O3)和过渡元素氧化物(MnO2)为着色剂,采用粉体掺杂方法,在四方多晶氧化锆陶瓷粉体中添加不同质量分数的着色剂,制备出6种有色四方氧化锆陶瓷,通过Shade-eye电脑比色仪比较6种牙色四方氧化锆陶瓷和Vita classical比色板之间的明度、色相、彩度差异,分析色度差的大小,为临床应用提供依据。结果:本实验获得的6种着色的四方氧化锆陶瓷的b*值在天然牙和Vita比色板覆盖范围内,接近天然牙的颜色;L*值范围从68.8～80.37;a*值范围从-1.0～0.9,b*值范围从12.2～17.93。结论:以Pr6O11、CeO2、Er2O3、MnO2氧化物作为着色剂,制备与天然牙颜色匹配的四方多晶氧化锆陶瓷是可行的。
Objective: To develop six kinds of dental tetragonal polycrystalline zirconia ceramics with matching color. Methods: The rare earth oxide (Pr6O11, CeO2, Er2O3) and transition elemental oxide (MnO2) were used as colorants, and the doping method was used to add the colorant with different mass fraction to the tetragonal polycrystalline zirconia ceramic powder. Six kinds of colored tetragonal zirconia ceramics were prepared. The differences of lightness, hue and saturation between the six kinds of dental colored tetragonal zirconia ceramics and the Vita classical color palette were compared by Shade-eye computer colorimetric analyzer. , Provide the basis for clinical application. Results: The b * values of the six kinds of colored tetragonal zirconia ceramics obtained in this experiment were close to those of natural teeth in the coverage range of natural teeth and Vita color plates; L * values ranged from 68.8 to 80.37; a * values ranged from -1.0 to 0.9, and b * values ranged from 12.2 to 17.93. CONCLUSION: It is feasible to prepare tetragonal polycrystalline zirconia ceramics with natural tooth color by using Pr6O11, CeO2, Er2O3 and MnO2 as colorants.