2O Brien W J, GLOh CL, Boenke KM. A new small-color-difierenee equation for dental shades [J]. J Dent Res,1990, 69:1762-1764
3Ferrarai M, Patron S, BaUeri P. Measurement of enamel thickness in relation to reduction for etched laminate veneers[J]. Int J Perio Restor Dent, 1992, 12: 407 - 413
4Chpindel P, Cristou M, Tooth preparation and fabrication of porcelain veneers using a double-layer technique [J]. Prac Perio Aesthet Dent, 19994, 6: 19 - 31
5Peumans M, Meerbeck V, Lambbrechts P, et al. Five-years clinical performance of porcelain veneers[J]. Quintessence Int,1998,29;211-221
6Rouse J, McGowan S. Restoration of the anterior maxilla with extra conservative veneers; clintical and laboratory considerations[J]. Pract Perio Aesthet Dent, 1999,11:333 - 339
7NakaNlura T, Saito 0, Fuyikawa J, et al. Influence of abutment substrate and ceramic t}lickness on the color of heat-pressed ceramic crowns [J].J 0Ial Rehab il. 2002,29:805-809
8Williamson RT. Techniques for aesthetic enhancement of porcelain laminate veneer restoration, a case report[J]. Pract Perio Aesthet Dent, 1994,6: 73 - 78