Because of the esthetic appeal, biocompatibility and adherence to the physiology of minimal-invasive dentistry, porcelain laminate veneers have now become a restoration of choice. The ultimate clinical results of porcelain laminate veneers could be affected by many factors, and the type of preparation designs was straightly related to the esthetic effect and the final achievement ratio. The type of preparation designs was one of the important warrants for good clinic results. The paper reviewed the types and the effects of preparation to the mechanical function and restoration results of porcelain veneers, in order to provide references for clinic applications.
