4. Components for yttriated zirconia prostheses
With process optimization reaching its limit (defect size reduction becoming increasingly difficult), further gains in mechanical properties required an intrinsically better material (i.e. one with superior toughness). At the end of the eighties, zirconia (in various forms) seemed the best candidate. This article shows the advantages and disadvantages of zirconia in relation to its microstructure, with particular emphasis on the importance of its phase change (which is responsible for its good mechanical properties, but also for problems of accelerated degradation).
The concepts outlined here are equally valid for all zirconia-containing composites, even if zirconia degradation does not exhibit the same kinetics or impacts if it occurs alone or within a composite.
4.1 Introduction...
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Components for yttriated zirconia prostheses
Components for alumina-zirconia prostheses
Bibliography
Websites
Numbers of ceramic prostheses implanted http://www.ceramtec.com/ceramic-materials/biolox/delta/ , accessed May 27, 2014.
Standards and norms
- Implants for surgery – Ceramic materials based on yttria-stabilized tetragonal zirconia (Y-TZP) - ISO 13356 - 2008
- Surgical implants – Partial and total hip joint prostheses – Part 2: Joint surfaces made of metallic, ceramic and plastic materials - ISO 7206-2 - 2011
- Surgical implants – Ceramic products – Part 1: High-purity alumina-based ceramic products - ISO 6474-1 - 2010
- Surgical implants –...
Patents
Reinforced porous coating. EP1924301 A1
Coating for dental applications. WO2010145822 A1
Directory
Manufacturers of ceramics for orthopedics (non-exhaustive list)
Kyocera (Bioceram AZ209, Al190 ) http://kyocera-md.com/technology/material/index.html
Ceramtec (Biolox® Delta, Biolox® Forte ) http://www.ceramtec.com/
...Statistical and economic data
Haute Autorité de Santé. Revision of generic descriptions for the list of reimbursable products and services "hip joint replacements" 2007 http://www.has-sante.fr
Haute Autorité de Santé. Revision of generic descriptions on the list of reimbursable products and services: knee joint implants. 2012
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