Clinical performance of scientifically designed, hot isostatic-pressed (HIP'd) zirconia cores in a bilayered all-ceramic system.

Purpose: The success of bilayered all-ceramic restorations is dependent upon the combination and contributions of the three principal components of these restorations: core material, core design, and core-veneer interface. The purpose of this paper is to describe the fabrication and clinical survival of optimized ceramic restorations having an explicit, scientifically designed core, machined from HIP'd isotropic zirconia and veneered using a specific protocol with thermally compatible porcelain.

Materials And Methods: Using a consistent clinical and laboratory protocol in a multicenter setting, 3,192 bilayered single and 797 bilayered splinted units were fabricated and placed on teeth and implant abutments in 1,007 patients.

A ten-unit all-ceramic anterior fixed partial denture using Y-TZP zirconia.

High-strength, all-ceramic systems are being recommended with increasing frequency for both anterior and posterior restorations. There are some significant differences in the physical and mechanical properties of these materials that ultimately affect their clinical performances. Consequently, these differences should be clearly understood before the restorative team selects the use of a particular system.

Classification of altered dental esthetics.

Clinical procedures designed to reestablish the idealized framework for the achievement of optimal esthetic restorative results have been frequently reported. Yet complex cases, where remarkable improvements of esthetic appearance are achievable in spite of preoperative conditions, are infrequently presented because the presentation standards appear to be set for idealized situations. If a classification system that reflects dental esthetic compromises and ideals existed, cases could be categorized accordingly, and realistic expectations could be applied to assess the effectiveness and results of a course of therapy.