Relative Translucency of Dental Lithium Disilicate Ceramic Restorations
This study investigated the relative translucency of IPS E.max core-veneer combinations of different colors at a clinically appropriate thickness.Core specimens (n=5) of IPS E.max were produced and veneered with IPS E.max veneering porcelain to a final dimension (13 mm in diameter,1.5mm in thickness).Luminous reflectance was measured three times each specimen with a calibrated spectrophotomete.Contrast ratios were measured from the luminous reflectance(Y) of the tested specimens with a black (Yb) and a white background (Yw).Contrast ratios ranged from 0.798-0.818 for LT core-veneer combinations,0.831-0.845 for MO core-veneer combinations,0.929-0.941 for HO core-veneer combinations.There were no significant difference in contrast ratios of core-veneer combinations of the same series (P>0.05).Contrast ratios of LT,HO,MO core-veneer specimens were significantly different (P<0.05).Luminosity and chroma are not related to the relative translucency of core-veneer specimens.LT core-veneer combinations exhibited highest relative translucency,followed by MO and HO core-veneer combinations.
Core materials Veneer ceramic Contrast ratios Lithium disilicate ceramic
Longquan Shao Ting Sun Yunna Gan Qi Liu Yuanfu Yi Bin Deng Ning Wen
Department of Stomatology,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China Department of Prosthodontics,College of Stomatology,Fourth Military Medical University,Xian 710032, Department of Stomatology,the General Hospital of Chinese Peoples Armed Police Forces,Beijing 10003 Department of Stomatology,the General Hospital of Chinese PLA,Beijing 100853,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1775-1778
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）