Publication: Contrast Ratio of Six Zirconia-Based Dental Ceramics
Issued Date
2014-01-01
Resource Type
ISSN
1532849X
1059941X
1059941X
Other identifier(s)
2-s2.0-84906082717
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Prosthodontics. Vol.23, No.6 (2014), 456-461
Suggested Citation
Widchaya Kanchanavasita, Premwara Triwatana, Kallaya Suputtamongkol, Alisa Thanapitak, Mathura Chatchaiganan Contrast Ratio of Six Zirconia-Based Dental Ceramics. Journal of Prosthodontics. Vol.23, No.6 (2014), 456-461. doi:10.1111/jopr.12143 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33774
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Contrast Ratio of Six Zirconia-Based Dental Ceramics
Other Contributor(s)
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.