Research and Education Color and translucency of zirconia infrastructures and porcelain-layered systems

The Journal of Prosthetic DentistryAvailable online 23 November 2018The study was presented as an oral presentation during the 47th Meeting of the International Association for Dental Research Continental European Division held during 15-17 October 2015 in Antalya, Turkey.AbstractStatement of problemA good color match combined with a proper translucency match results in excellent esthetics for a metal-free restoration, yet basic color and translucency comparisons between available zirconia systems are not well described.PurposeThe purpose of thisin vitro study was to compare the color and translucency of commercially available zirconia materials.Material and methodsEight specimen disks were formed in each of the single-layer (0.5-mm thick) groups and double-layer (0.5-mm zirconia with 1.0-mm porcelain) groups for each of 5 zirconia-based substructure systems. Colors on black, gray, and white backings were used to obtain CIEDE2000 color differences between the zirconia systems in the layering groups and to obtain relative translucency parameter (RTP) values. Color differences were compared with perceptibility and acceptability thresholds, and comparisons in RTP were made using analyses of variance and the Bonferroni corrected Studentt tests ( α=.05).ResultsThe Shrout-Fleiss random set reliability for the duplicate L* determinations was 0.9992, 0.9756 for a*, and 0.9959 for b*. Although some mean color differences were below or at the perceptibility threshold, m...
Source: Dental Technology Blog - Category: Dentistry Source Type: news

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