华西口腔医学杂志2024，Vol.42Issue(3)：353-358,6.DOI:10.7518/hxkq.2024.2023372
人工老化对不同品牌超透氧化锆光学特性的影响
Effect of artificial aging on optical properties of ultra-translucent zirconia ceramics of different brands
摘要
Abstract
Objective This work aimed to evaluate the effect of artificial aging on the translucency and color differ-ence(ΔE)of ultra-translucent zirconia and provide a reference for clinical application.Methods The discs of ultra-translucent zirconia from six brands(Wieland,3M ESPE,Amann Girrbach,Kuraray Noritake,Upcera,and Besmile)were cut and sintered according to each manufacturer's product instructions;the experimental groups were named ZNT,LVP,AG,KAT,UPC,and BSM,respectively.IPS e.max Press was used as the control group(PLT).The specimens(n=6)were prepared with a diameter of 14 mm and a thickness of 1 mm.The specimens were subjected to artificial aging treat-ment according to the following conditions:in an auto-clave at 134℃ at 0.2 MPa for 4,8,and 12 h.According to the CIE1976Lab system,the CIE L*,a*,and b* values of the specimens before and after aging were measured by a co-lorimeter.The translucency parameter(TP)and ΔE were calculated.Results The mean TP values of each group before aging inorder were PLT>KAT>AG>ZNT>BSM>UPC>LVP.We found no significant difference in translu-cency in all experimental groups after aging for 4 and 8 h compared with those before aging.After 12 h of aging,the TP values of the KAT and ZNT groups were not significantly different from those before aging,but the TP values of the AG,BSM,LVP,and UPC groups were significantly lower than those before aging(P<0.05).The TP value of the control group was significantly higher than that of the other experimental groups at different stages(P<0.05).ΔE=3.3 was con-sidered the visible color difference,and ΔE was less than 3.3 in all groups after 4 h of aging.After aging for 8 h,ΔE of the UPC group was slightly higher than 3.3.ΔE of the BSM and UPC groups was greater than 3.3 after 12 h of aging.Conclusion The TP and ΔE of different brands of ultra-translucent zirconia may change after various aging times.The translucency of some zirconia showed a decreasing trend and the color difference showed an increasing trend with the aging time.关键词
氧化锆/低温老化/光学性能/半透性/色差Key words
zirconia/low-temperature degradation/optical property/translucency/color difference分类
医药卫生引用本文复制引用
陈罗娜,张鑫,田正宇,王剑..人工老化对不同品牌超透氧化锆光学特性的影响[J].华西口腔医学杂志,2024,42(3):353-358,6.基金项目
National Key R&D Program of China(2022YFC2410103)国家重点研发计划资助(2022YFC2410103) （2022YFC2410103）
