Translucency and masking ability of translucent zirconia; comparison with conventional zirconia and lithium disilicate
- 주제(키워드) Translucent zirconia , Masking ability , Translucency parameters , Conventional zirconia
- 주제(기타) Dentistry, Oral Surgery & Medicine
- 설명문(일반) [Park, Joon Hee; Park, Eun-Jin] Ewha Womans Univ, Sch Med, Dept Prosthodont, Seoul, South Korea; [Bang, Hyun Ji] Iru Dent Clin, Kangnung, South Korea; [Choi, Nak-Hyun] Yonsei Design Dent Clin, Seoul, South Korea; [Park, Eun-Jin] Ewha Womans Univ, Sch Med, Dept Dent Prosthodont, 1071 Anyangcheon Ro, Seoul 07985, South Korea
- 등재 SCIE, SCOPUS, KCI등재
- OA유형 Green Published, gold
- 발행기관 KOREAN ACAD PROSTHODONTICS
- 발행년도 2022
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000203137
- 본문언어 영어
- Published As https://doi.org/10.4047/jap.2022.14.5.324
- PubMed https://pubmed.ncbi.nlm.nih.gov/36452362
초록/요약
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.
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