1SeghiRR, Sorensen JARelation Flaxural of six ceramic materials [J]. Int J Prosthodont,1995,8:239-246.
2Tinscherf J, Natt G, Spiekemann H, et al. Fracture re- sistance of lithium disilieat, alumina-and zirconia- based three unit fixed denture: a laboratory study[J].Int J Prosthodont, 200 !, 14(3): 231-238.
3Guszzato M ,Proosk ,Quach L ,et aI.Strength,reliability and mode of fracture of bilayered porcelain/zirconia (Y-TZP) dental ceramics [J].Biomaterials ,2004,25.
6Ohhof LW, Van Der Zel JM, de Ruiter WJ, et al. Computer modeling of ocelusal surfaces of posterior teeth with the CICERO CAD/CAM system[J]. JProsthet Dent, 2000, 84(2): 154-162.
7Vail der Zel JM, Vlasr S, de Ruiter WJ, et al. The CICERO system for CAD / CAM fabrication of full- ceramic crowns [J]. Prosthet Dent, 2001,85(3): 261-267.
8Tinseherf J, Natt G, Mautsch W, et al. Marginal fit of alumina and zirconia-based fixed partial dentures produced by a CAD / CAM system [J]. Oper Dent, 2001,26(4): 367-374.
9Covacci V, Bruzzese N,Maccauro G,et al,In Vicro evaluation of the mutagenic and carcinogenic pow of high purity zirconia ceramic [J].B iomaterials, 1999,20: 371-376.
10Regina L,W, Petra E.Lockwoodb, et al.In vitro cy-totoxicity of traditional versus contemporary dental ceramics [J].Prosthet Dent, 2003,90:452-458.