Harada Rino, Takemoto Shinji, Hattori Masayuki, Yoshinari Masao, Oda Yutaka, Kawada Eiji
Department of Dental Materials Science, Tokyo Dental College.
Dent Mater J. 2015;34(6):918-24. doi: 10.4012/dmj.2015-171.
This study investigated the effects of different colored tetragonal zirconia polycrystal (TZP) core on the optical properties of TZP framework restorations. Three various colors of TZP discs (Katana Zirconia) 14 mm in diameter and 0.5 mm thickness were layered with 2 shades of veneering ceramics (shade A1 and A4: Cerabian ZR). These specimens were polished to approximately 1.5 mm. CIE Lab* coordinates, translucency (TP), and opalescence (OP) on the TZP restorations were evaluated. Consequently, TZP core color affected CIE Lab* values of TZP restorations however TP and OP did not significantly differ among the 3 core colors. Translucency and opalescence for colored TZP framework restorations were not influenced by the underlying TZP core color when veneering ceramics were layered to thicknesses of 1.0±0.1 mm.
本研究调查了不同颜色的四方氧化锆多晶体（TZP）核芯对TZP框架修复体光学性能的影响。制备了三种直径为14 mm、厚度为0.5 mm的不同颜色TZP圆盘（卡塔纳氧化锆），并在其上叠加两种色调的饰面陶瓷（色调A1和A4：赛拉比安ZR）。将这些试件抛光至约1.5 mm。评估了TZP修复体的CIE Lab坐标、半透明度（TP）和乳光（OP）。结果表明，TZP核芯颜色影响TZP修复体的CIE Lab值，但三种核芯颜色之间的TP和OP没有显著差异。当饰面陶瓷叠加至1.0±0.1 mm厚度时，彩色TZP框架修复体的半透明度和乳光不受底层TZP核芯颜色的影响。
