唾液浸泡对IPS e.max全瓷贴面树脂粘结剂颜色稳定性影响

Effect of bonding agents for IPS e.max porcelain veneers on the color stability in artificial saliva

目的研究人工唾液浸泡对IPS e.max全瓷贴面树脂粘结剂颜色的影响。方法用IPS e.max玻璃陶瓷制作试件21个平均分成A、B、C 3组,A组采用Superbond C&B化学固化粘结剂粘结,B组采用RelyXTM Veneer光固化粘结剂粘结,C组采用VariolinkⅡ双重固化粘结剂粘结,3种粘结剂的颜色都选为A3色。在黑暗环境保持24 h后用色度计测量色度值。然后将各组试件分别经人工唾液浸泡7、30、90d后再次测量其色度值,比较3种粘结剂的颜色稳定性。结果随着人工唾液浸泡时间的延长,3组之间的L*、a*、b*值差异均无显著性。但3组试件的L*、a*、b*值均随着浸泡时间的延长而发生变化(P<0.05)。结论随着浸泡时间的延长3种粘结剂都会发生变色,然而这种颜色的改变程度是在临床美学要求范围内,不易为肉眼所察觉。

Objective To evaluate the color stability of the bonding agent for IPS e.max porcelain veneers in artificial saliva.Methods 21 round porcelain specimens were fabricated with IPS e.max dentin porcelain which were divided them into 3 group randomly：group A was Superbond CB resin（self-cure）,group B was RelyXTMVeneer bonding agents（light-cure）,and group C was variolinkⅡ bonding agents（dual-cure）.Then these specimens were luted on resin base with corresponding bonding agents respectively and the values of L＊,a＊,b＊ were measured by spectrophotometer as baseline.After soaked in artificial saliva,the values were measured in the 7th day,the 30th day,and the 90th day again.The color differences（ΔE）was calculated.All of L＊ and a＊ and b＊ values were analyzed by SPSS 10.0 to study the color stability of the three bonding agents.Results When the specimens were soaked in artificial saliva for 90 days,the L＊,a＊,b＊ values of three bonding agents were no significant differences（P〉0.05）.The average ΔE value was 1.05,0.60 and 0.64 respectively.However,with time went on,the three bonging agents had color change（P〈0.05） ：The L＊ values decreased,and the a＊,b＊ values increased.Conclusion In artificial saliva,the color of three bonding agents will change with time goes on.However,the color change is not beyond the clinical aesthetic demand in short time.