Development of Y-TZP Pre-Sintered Blocks for CAD-CAM Machining of Dental Prostheses

Roberta M.C. Sasahara; H.N. Yoshimura; Cátia Fredericci; Alberto Calasans; Paulo Francisco Cesar; André Luiz Molisani

doi:10.4028/www.scientific.net/MSF.591-593.712

Paper Titles

Sintering of Commercial Leucite-Based Dental Porcelains
p.692

Characterization of the Apatite Formation on the Surfaces of Zirconia and Alumina Ceramics in Body Environments
p.697

Evaluation of Biomimetic Solution for Coating Powder Metallurgy Porous Titanium Samples
p.703

Selected Values for the Stacking Fault Energy of Face Centered Cubic Metals
p.708

Development of Y-TZP Pre-Sintered Blocks for CAD-CAM Machining of Dental Prostheses
p.712

Microstructural and Mechanical Characterization of Sintered Hydroxyapatite Samples
p.717

Influence of Synthesis Route on Phase Formation and Sinterability of Hydroxyapatite-Zirconia Composites
p.722

Ni/α-Al₂O₃ Catalysts Modified with ZnO and Fe₂O₃ for Steam Reforming of the Natural Gas
p.729

Hydrogen Production by Ethanol Steam Reforming Over Cu and Ni Catalysts Supported on ZrO₂ and Al₂O₃ Microspheres
p.734

HomeMaterials Science ForumMaterials Science Forum Vols. 591-593Development of Y-TZP Pre-Sintered Blocks for...

Development of Y-TZP Pre-Sintered Blocks for CAD-CAM Machining of Dental Prostheses

Abstract:

The aim of this work was to establish a route to produce pre-sintered blocks of Y-TZP (yttria stabilized tetragonal zirconia polycrystal) suitable to be machined in a commercial CADCAM system, used to manufacture crowns and bridge frameworks for dental applications. Two commercial Y-TZP powders were investigated. The powders were pressed with different compaction pressures (40 to 500 MPa) and pre-sintered at temperature ranging from 900 to 1100°C. Vickers hardness, biaxial flexural strength, and linear shrinkage could be correlated to the relative density of pre-sintered samples. Using an empirical equation, pre-sintered blocks with a pre-defined density could be prepared. The blocks withstood the machining in a CAD-CAM system, and the machined and sintered crowns presented good adaptation.