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- Title
Optical properties and flexural strength of translucent zirconia layered with high-translucent zirconia.
- Authors
Takanori SAKAI; Toru SATO; Ryuichi HISANAGA; Akimasa SHINYA; Shinji TAKEMOTO; Masao YOSHINARI
- Abstract
This study investigated the optical properties and flexural strength of translucent TZP layered with high-translucent PSZ using resin cement of various shades. Zirconia specimens (translucent TZP; Zpex and high-translucent PSZ; ZpexSmile) were 13 mm in diameter, layered at thickness ratios of 0.3/0.7, 0.5/0.5, and 0.7/0.3 mm (ZpexSmile/Zpex), and then luted using resin cement of 3 shades. Monolithic specimens of both were used as controls. CIE L*a*b* color coordinates and translucency parameter (TP) were evaluated as optical properties. Biaxial flexural strength was also determined as a mechanical evaluation. The a* and b* values of layered specimens varied depending on the shade of cement. TP values were not affected by shade of cement and thickness ratio. The biaxial flexural strength was intermediate value between both monolithic specimens. The layering method of zirconia with various translucencies using resin cement of different shades can improve color expression while maintaining clinically sufficient flexural strength.
- Subjects
FLEXURAL strength; OPTICAL properties; ZIRCONIUM oxide; CEMENT
- Publication
Dental Materials Journal, 2019, Vol 38, Issue 3, p368
- ISSN
0287-4547
- Publication type
Article
- DOI
10.4012/dmj.2018-157