4Roach MD, et al. Use of X-ray photoelectron spectroscopy and cyclic polarization to evaluate the corrosion behavior of six nichel-chromium alloys before and after porcelain-fused-to-metal firing[J]. J Prosthet Dent, 2000,84(6):624~634
5Mclean JW. The Science and Art of Dental Ceramics(VoII) : Bridge design and laboratory procefutes in dental ceramics[M]. Chicago: Quintessence Publ Co,Inc, 1980:22-23
6Vincenzini P. Ceramics in clinical application. [M].Elsevier Science Publishers, B.V, 1987:104
7Harrison L, et al. all-porcelain labial margin for ceramo-metal crowns. J Esthet Dent, 1992,4(5):54
8Wagman SS. The role of coronal contour in gingival health[J]. J Prosthet Dent, 1997,37(3):280
9Herbert T, Shilling B, etc. Fundamentals of fixed prosthodontics[M].Third Edition. Chicago: Quintessence Books, 1997:132