Paper Title:
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.

  Info
Periodical
Materials Science Forum (Volumes 591-593)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
712-716
DOI
10.4028/www.scientific.net/MSF.591-593.712
Citation
R. M.C. Sasahara, H.N. Yoshimura, C. Fredericci, A. Calasans, P. F. Cesar, A. L. Molisani, "Development of Y-TZP Pre-Sintered Blocks for CAD-CAM Machining of Dental Prostheses", Materials Science Forum, Vols. 591-593, pp. 712-716, 2008
Online since
August 2008
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$32.00
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