Influence of differ ent types of posts and cor es on color of IPS- Empr ess 2 crown

LI Dong- fang1，2, YANG Jing- yuan1, YANG Xing- mei1, YANG Liu1, XU Qiang1, GUAN Hong- yu1, WAN Qian- bing3

West China Journal of Stomatology . 2007, (05): 450 -453 .