Objective To discuss ihe effecl of denlin porcelain ihickness on ihe shade of PFM. Methods Groups of PFM samples wilh different denlin porcelain lhickness(O. 3mm,0. 6mm,0. 9mm,1. 2mm,1. 5mm)were fabricaled by using SHOFU Vinlage Halo A2 denlin porcelain cemenl, L* a* b* value were lesled wilh ihe chronomeler, and ihe Ca*, value were calculated. The shade difference belween samples and VITA A2 shade guide was compared. Results The L* value decreased wilh ihe increase of ihe denlin porcelain ihickness, while ihe a*b* values increased. There was no significant difference belween samples and shade guide when denlin porcelain ihickness was 1. 2mm-l. 5mm. Conclusion Denlin porcelain can only have ihe same effecl as shade guide when ihe ihickness is wilhin a certain range%目的 探讨牙本质瓷厚度对金属烤瓷修复体颜色的影响.方法 用SHOFU Vintage Halo A2色牙本质瓷粉制作牙本质瓷为不同厚度(0.3mm、0.6mm、0.9mm、1.2mm、1.5mm)的金属烤瓷试件,用色度计测量试件的L*、a*、b*值,并计算其⊿E 和C*ab.比较试件颜色与VITA A2色比色片颜色的差异.结果 随着牙本质瓷厚度的增加,金属烤瓷试件的明度L*值逐渐下降,而a*、b*值逐渐升高,当厚度为1.2mm～1.5mm时与比色片的颜色无明显差异.结论 牙本质瓷厚度的变化对金属烤瓷修复体的颜色有显著影响.牙本质瓷只有在一定厚度范围才能达到与所选比色片颜色相一致的效果.
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