Shade evaluation of pressed ceramic and milled zirconia crowns. A qualitative study.

Abstract

Despite high aesthetics, shade of full ceramic restoration can be a difficult task specially in case of anterior single crown restorations. For the first group, ten ceramic crowns for anterior teeth were made from IPS e.max Cem. The pressed ceramic cores were veneered with feldspathic ceramic IPS e.max.Ceram. For the second group were milled ten samples zirconium oxide cores and veneered with feldspathic ceramic IPS e.max.Ceram. The evaluation of core influence over the final shade is checked with a spectrophotometer and standard shade guide. The shades of the samples of two groups were registered in three areas of the buccal surface: third incisal, third middle and third cervical. The shades were digitally registered with Vita Easy Shade Compact and with standard Vital Classical shade guide. Samples that require accurately individualized aesthetics may encounter final shade modification. The digital system for shade registration have high precision and avoid human error.