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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/33774
Title: Contrast Ratio of Six Zirconia-Based Dental Ceramics
Authors: Widchaya Kanchanavasita
Premwara Triwatana
Kallaya Suputtamongkol
Alisa Thanapitak
Mathura Chatchaiganan
Mahidol University
Keywords: Dentistry
Issue Date: 1-Jan-2014
Citation: Journal of Prosthodontics. Vol.23, No.6 (2014), 456-461
Abstract: Purpose: The objective of this study was to determine the effect of thickness and brands on the contrast ratio of six zirconia dental ceramics. Materials and Methods: Six brands of yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics (ZENO® Translucent, Lava™ Plus High Translucency, inCoris TZI, Cercon® Base, Zeno®Zr, Lava™) were used in this study. Disc-shaped specimens with 15 mm diameter were prepared in five thickness levels (0.3, 0.6, 0.9, 1.2, 1.5 mm, n = 10) for each brand. The contrast ratio (CR = Yb/Yw) was determined from the luminous reflectance over black (Yb) and white (Yw) backgrounds using a spectrophotometer. Two-way ANOVA was performed to determine the significant differences among thicknesses and brands at α = 0.05. Results: The mean contrast ratio values of six zirconia ceramics were significantly different and influenced by both the thickness and brand. The mean contrast ratio values of all groups increased as their thickness increased from 0.3 to 1.5 mm. inCoris TZI was the most translucent, with the lowest contrast ratio at a thickness of 0.6 to 1.5 mm. The mean contrast ratio values of Lava™ and Lava™ Plus were significantly lower than those of Zeno®Zr, ZENO® Translucent, and Cercon® Base. Conclusions: The thickness and brands had significant effects on the contrast ratio of six zirconia dental ceramics. The mean contrast ratio values of inCoris TZI, Lava™, and Lava™ Plus High Translucency were significantly lower than those of Cercon® Base, Zeno®, and ZENO® Translucent at all thicknesses. © 2014 by the American College of Prosthodontists.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84906082717&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/33774
ISSN: 1532849X
1059941X
Appears in Collections:Scopus 2011-2015

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