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Translucency and masking ability of translucent zirconia; comparison with conventional zirconia and lithium disilicate
- Title
- Translucency and masking ability of translucent zirconia; comparison with conventional zirconia and lithium disilicate
- Authors
- Park, Joon Hee; Bang, Hyun Ji; Choi, Nak-Hyun; Park, Eun-Jin
- Ewha Authors
- 박은진
- SCOPUS Author ID
- 박은진
- Issue Date
- 2022
- Journal Title
- JOURNAL OF ADVANCED PROSTHODONTICS
- ISSN
- 2005-7806
2005-7814
- Citation
- JOURNAL OF ADVANCED PROSTHODONTICS vol. 14, no. 5, pp. 324 - 333
- Keywords
- Translucent zirconia; Masking ability; Translucency parameters; Conventional zirconia
- Publisher
- KOREAN ACAD PROSTHODONTICS
- Indexed
- SCIE; SCOPUS; KCI
- Document Type
- Article
- Abstract
- PURPOSE. The purpose of this study is to evaluate translucency and masking ability of translucent zirconia compared to conventional zirconia and lithium disilicate materials. MATERIALS AND METHODS. Three types of zirconia blocks with different yttria contents (3Y, 4Y, 5.5Y) and LS blocks (Rosetta SM) were used. Ten specimens for each group were fabricated with 10 mm diameter, with both 0.8 mm and 1.5 mm thicknesses (+/- 0.02 mm). All groups of zirconia specimens were sintered and polished according to the manufacturer's instructions. To calculate the translucency parameter (TP), CIELAB value was measured with a spectrophotometer on black and white backgrounds. To investigate the color masking abilities, background shades of A2, normal dentin, discolored dentin, and titanium were used. The color difference (Delta E) was calculated with the CIELAB values of A2 shade background as a reference compared with the values in the various backgrounds. One-way ANOVA and Bonferroni tests were conducted (P < .05). RESULTS. The TP values of zirconia specimens increased as the yttria content increased. All materials used in the study were able to adequately mask normal dentin shade (Delta E < 5.5), but were incapable of masking severely discolored dentin (Delta E > 5.5). On the titanium background, all materials of 1.5 mm thickness were able to mask the background shade, but with a thickness of 0.8 mm, only 3Y-TZP and 4Y-PSZ were able to mask titanium background. CONCLUSION. All zirconia materials and lithium disilicate specimens used in this study were unable to adequately mask the shade of severely discolored dentin. It is recommended to use 3Y-TZP or 4Y-PSZ with a sufficient thickness of 0.8 mm or more to mask titanium.
- DOI
- 10.4047/jap.2022.14.5.324
- Appears in Collections:
- 의과대학 > 의학과 > Journal papers
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