不同桩核背景对高透氧化锆全瓷材料颜色的影响

Effect of different post-cores on the color of high transparent zirconia ceramics

目的分析Lava Plus高透氧化锆全瓷材料在钴铬金属、遮色钴铬金属、贵金属、遮色贵金属4种桩核背景下应用的颜色变化。方法制作颜色分别是2M2、3M2的高透氧化锆瓷片,分别以钴铬金属、遮色钴铬金属、贵金属、遮色贵金属材料和2M2、3M2本色氧化锆瓷块作为背景,采用3nh色差仪测量不同背景下瓷片中央区域的L、a、b值,进行多因素方差分析及LSD两两比较,并根据公式计算和比较色差值ΔE。结果颜色、底色及颜色和底色的交互作用对L、a、b值影响具有统计学意义(P=0.000)。钴铬金属组在4种底色中L、a、b均值最低,遮色组L、a、b均值高于非遮色组。除2M2和3M2组的Δa值差异没有统计学意义外(P=0.252),颜色、底色及其交互作用对氧化锆瓷片色差值ΔL、Δa、Δb、ΔE的影响均具有统计学意义(P=0.000)。钴铬金属组ΔE均超出临床可接受范围(ΔE≥5.5)。遮色钴铬金属、遮色贵金属、贵金属组均不超过肉眼可识别范围(ΔE<2.6)。结论钴铬金属桩核对Lava Plus高透氧化锆颜色具有显著性影响。但Lava Plus高透氧化锆对其他背景有较好的遮色效果。

Objective To investigate the masking ability of Lava Plus high transparent zirconia under different post-cores including Co-Cr alloy,masking Co-Cr alloy,precious metal and masking precious metal. Methods Specimens were fabricated by Lava Plus high transparent zirconia block. The colors of specimens were 2 M2 and 3 M2. Co-Cr alloy,masking Co-Cr alloy,precious metal,masking precious metal and 2 M2,3 M2 zirconia blocks were fabricated as backgrounds. The L,a,b values in the central region of each specimen placed on the different post-cores were measured by using a 3 nh spectrophotometer. Multivariate analysis of variance（ ANOVA） and LSD＇s test were performed,and ΔE values were calculated and compared according to the formula. Results There was a statistically significant difference in L,a,b values of colors,backgrounds and their interaction（ P = 0.000）. The Co-Cr alloy group had the lowest mean L,a,b values among the four backgrounds,and the masking Co-Cr alloy and masking precious metal group had higher mean values than the other two backgrounds. There was a statistically significant difference in ΔL,Δa,Δb,ΔE values of colors,backgrounds and their interaction（ P = 0.000）,except Δa values in 2 M2 and 3 M2 groups（ P = 0.252）. The ΔE values in the Co-Cr alloy group exceeded the clinically acceptable range（ ΔE ≥ 5. 5）,which in the masking Co-Cr alloy group,precious metal group and masking precious metal group were not more than the perceptible threshold（ ΔE2.6）. Conclusions Co-Cr alloy post-core has a significant effect on the color of Lava Plus high transparent zirconia,while Lava Plus zirconia has good opacity on the other backgrounds.