3Kim JW, Bhowmick S, Hermann I, et al. Transverse fracture of brittle bilaye：: relevance to failure of all-ceramic dental crowns [J]. J Boimed Mater Res B Appl Biomater, 2006, 79( 1 ) : 58 - 65.
4Huang M, Niu X, Sobuyejo WO. Creep induced effects on radical cracks in multilayered structures[ J ]. J Mater Sci Mater Mcd, 2007, 18(1): 65-69.
5Niu X, Yang Y, Soboyejo W. Contact deformation aud cracking of zirconia/cement/foundation dental multilayers [ J ]. Mater Sci Eng A, 2008, 485(1 -2): 517-523.
6White SN, Miklus VG, Chang PP, et al. Controlled failure mecha- nisms toughen the dentino-enamel junction zone [ J ]. J Prosthe Dent, 2005, 94(4) : 330 -335.
7Marashall GW, Bal：xn'h M, Gallagher RR, et al. Mechanical pruperties of the dentinoenamel junction: AFM studies of nanohardness, elastic modulus, and fracture[J]. J Binmed Mater Res, 2001, 54 (1): 87 -95.
8Huang M, Wang R, Thompson V, et al. Bioinsired design of dental multilayers[J]. J Mater Sci Mater Med, 2007, 18(1): 57-64.
9Niu X, Rahbar N, Farias S, et al. Bio-inspircd design of dental muhilayers: experiments and model [J]. J Mech Behav Bimned Mater, 2009, 2(6) : 596 -602.
10Kim JW, Liu L, Zhang Y. Improving the resistance to sliding contaet damage of zirconia using elastic gradients [ J ]. J Biomed Mater Res B Appl Biomater, 2010, 94(2) : 296 -304.
