Journal article
Ceramic materials for porcelain veneers. Part I: Correlation between translucency parameters and contrast ratio
The Journal of prosthetic dentistry, Vol.110(5), pp.397-401
11/2013
DOI: 10.1016/j.prosdent.2013.06.008
PMID: 23998620
Abstract
Different parameters are used in the literature to describe translucency, making it difficult for clinicians to find clear information on ceramic translucency and compare studies.
The purpose of this study was to assess the correlation between the contrast ratio (CR) and translucency parameter (TP) when the translucency of different types of ceramic systems is compared.
Disks 13 mm in diameter and 0.7 mm thick were fabricated for the following materials (n=5): VITA VM9, VITA PM9, IPS Empress CAD, IPS e.max CAD, IPS e.maxPress, and Lava Zirconia. VITA VM9 served as positive control, while Lava Zirconia served as negative control. The luminous reflectance (Y) and color coordinates (CIE L* a* b*) of the specimens were measured with a tristimulus colorimeter. The CR (CR=Yb/Yw) was calculated from the reflectance of the light of the material on a black backing (Yb) to the reflectance on a white backing (Yw). The TP (TP=[(Lb*Lw*)2+(ab*-aw*)2+(bb*-bw*)2 ]1/2) was calculated from the color difference of the material on a black versus a white background. One-way ANOVA based on ranked data and the Pearson and Spearman rank correlation tests were used to analyze the data (α=.05).
A significant correlation between CR and TP was found when all specimens were included (P<.001). The coefficient of -0.99 indicated a strong decreasing relationship between the 2 variables.
Either CR or TP can be used to evaluate the relative translucency of ceramic systems.
Details
- Title: Subtitle
- Ceramic materials for porcelain veneers. Part I: Correlation between translucency parameters and contrast ratio
- Creators
- Karine T.L Barizon - Assistant Professor, Department of Restorative Dentistry, University of Colorado School of Dental Medicine, Aurora, ColoCathia Bergeron - Associate Professor, Department of Operative Dentistry, Université Laval Faculty of Dentistry, Québec, Canada, Laval University Faculty of Dentistry, Québec, CanadaMarcos A Vargas - Professor, Department of Family Dentistry, The University of Iowa College of Dentistry, Iowa City, IowaFang Qian - Associate Research Scientist, Adjunct Assistant Professor, Biostatistics Unit/Department of Preventive and Community Dentistry, The University of Iowa College of Dentistry, Iowa City, IowaDeborah S Cobb - Associate Professor, Department of Operative Dentistry, The University of Iowa College of Dentistry, Iowa City, IowaDavid G Gratton - Associate Professor, Department of Prosthodontics, The University of Iowa College of Dentistry, Iowa City, IowaSaulo Geraldeli - Associate Professor, Division of Operative Dentistry, University of Florida College of Dentistry, Gainesville, Fla
- Resource Type
- Journal article
- Publication Details
- The Journal of prosthetic dentistry, Vol.110(5), pp.397-401
- Publisher
- Mosby, Inc
- DOI
- 10.1016/j.prosdent.2013.06.008
- PMID
- 23998620
- ISSN
- 0022-3913
- eISSN
- 1097-6841
- Language
- English
- Date published
- 11/2013
- Academic Unit
- Preventive and Community Dentistry; Oral and Maxillofacial Surgery; Operative Dentistry; Family Dentistry; Dental Research; Hospital Dentistry
- Record Identifier
- 9984065716202771
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