Abstract:

Objective To study the color reappearance effect of metal -ceram restoration and foundry -ceram restoration using Crystaleye spectrophotometer. Methods 58 metal-ceram restorations and 58 foundry-ceram restorations according to the result of the Crystaleye spectrophotometer were made respectively. The △E between restorations and natural teeth as referenced were analyzed. And satisfaction of dentists and patients were evaluated. Results The △E between metal-ceram restorations and natural teeth was 7.13±0.74. The △E between foundry-ceram restorations and teeth was 1.47±0.84. There were statistical differences between the △E（P<0.01）. The satisnatural faction of dentists and patients to the foundry-ceram restorations were higher than to the metal-ceram restorations（P<0.05）. Conclusion Crystaleye spectrophotometer can provide accurate reference for foundry-ceram restoration, but for metal-ceram restoration it is not accurate.

Key words: metal-ceram restoration, foundry-ceram restoration, color, natural tooth