氧化锆和玻璃陶瓷颜色及半透明度稳定性的体外研究  

In vitro Study of Color and Translucency Stability of Zirconia and Glass-ceramic

作　　者：刘晓强[1] 刘明月 杨洋[1] 陈立[1] 周建锋[1] 谭建国[1] LIU Xiaoqiang;LIU Mingyue;YANG Yang;CHEN Li;ZHOU Jianfeng;TAN Jianguo(Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China;First Clinical Division, Peking University School and Hospital of Stomatology, Beijing 100034, China)

机构地区：[1]北京大学口腔医院修复科,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,北京100081 [2]北京大学口腔医院第一门诊部,北京100034

出　　处：《口腔医学研究》2021年第4期335-338,共4页Journal of Oral Science Research

基　　金：中华口腔医学会青年临床科研基金(编号:CSA-P2019-02)。

摘　　要：目的:研究紫外线老化对氧化锆和玻璃陶瓷的颜色及半透明度的影响。方法:制备高透氧化锆、低透氧化锆、高透玻璃陶瓷、低透玻璃陶瓷试件各12个、共48个,试件厚度(1.60±0.02)mm,利用600目金刚砂纸磨光。试件经紫外灯(波长253.7 nm,功率250 w/m^(2))照射0 h、12 h和24 h后,利用光谱辐射度计分别在灰色、黑色和白色背景下测定L^(*)a^(*)b^(*)颜色值,计算颜色变化(ΔE)和半透明度。以ΔE>1.0为视觉可见水平,以ΔE<3.3为临床可接受水平。结果:经紫外线照射12 h和24 h后,高透氧化锆的颜色变化分别为(3.33±0.78)和(6.00±0.84),低透氧化锆的颜色变化分别为(1.53±0.42)和(3.45±0.40),上述颜色变化均有临床意义(ΔE>1.0),且高透氧化锆的颜色变化比低透氧化锆更明显(P<0.05)。高透玻璃陶瓷和低透玻璃陶瓷老化后的颜色变化量均小于1.0,不具有临床意义。4种陶瓷经紫外线照射12 h和24 h后,半透明度的降低均有统计学意义(P<0.05),其中高透氧化锆的半透明度变化分别为(-3.62±0.76)和(-4.59±0.75),变化幅度大于其它3种陶瓷(P<0.05)。结论:高透氧化锆经紫外线老化后,颜色变化超出临床可接受范围,半透明度显著降低。低透氧化锆和玻璃陶瓷的颜色和半透明度受紫外线老化影响均比高透氧化锆小。Objective:To evaluate the color and translucency of zirconia and glass ceramic after ultraviolet aging.Methods:Forty-eight specimens(n=12)of high-translucent zirconia,low-translucent zirconia,high-translucent glass-ceramic,and low-translucent glass-ceramic were prepared(1.60±0.02 mm thickness)and polished by 600 mesh emery sandpaper.The L^(*)a^(*)b^(*)color measurements were performed using a spectroradiometer under gray,black,and white background.Color and translucency values of the specimens before and after ultraviolet aging(λ=253.7 nm,250 w/m^(2))for 12h and 24h were evaluated.Color changes(ΔE)were considered to be visually perceptible whenΔE>1.0 and clinically acceptable whenΔE<3.3.Results:After ultraviolet aging for 12h and 24h,ΔE of high-translucent zirconia were(3.33±0.78)and(6.00±0.84),ΔE of low-translucent zirconia were(1.53±0.42)and(3.45±0.40),respectively.These color changes were visually perceptible with clinical significance(ΔE>1.0),and the color change of high-translucent zirconia was more prominent than that of low-translucent zirconia(P<0.05).TheΔE of high-translucent and low-translucent glass-ceramics after ultraviolet aging were less than 1.0 and visually imperceptible.The translucencies of 4 ceramics decreased significantly after ultraviolet aging for 12 h and 24 h(P<0.05).The translucency changes of high-translucent zirconia were(-3.62±0.76)after ultraviolet aging for 12 h and(-4.59±0.75)after ultraviolet aging for 24 h,which were significantly remarkable than those of other 3 ceramics(P<0.05).Conclusion:The color change of high-translucent zirconia after ultraviolet aging exceeded the clinically acceptable level,and the translucency of it decreased significantly.The color and translucency of low-translucent zirconia and both glass-ceramics were less affected by ultraviolet aging.

关 键 词：氧化锆 陶瓷 紫外线 老化 

分 类 号：TQ1[化学工程]