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Wear characteristics of sliding pairs of zirconia (Y-TZP) for hip endoprostheses

Paper ID Volume ID Publish Year Pages File Format Full-Text
13993 996 1996 6 PDF Available
Title
Wear characteristics of sliding pairs of zirconia (Y-TZP) for hip endoprostheses
Abstract

Femoral ball heads made of aluminium or zirconium oxide ceramics are used for total hip replacement. This application is based on their attractive tribological properties. Standard and state-of-the-art with good wear properties are femoral ball heads made of alumina (Al2O3) articulating against polyethylene (PE-UHMW) acetabular cups (since 1974) and zirconia (Y-TZP) heads articulating against polyethylene cups (since 1986). The best tribological combinations are alumina heads articulating against alumina cups. Zirconia has better mechanical properties (for example, bending strength or fracture toughness) than alumina. Therefore R&D is going on to design zirconia acetabular cups. The wear characteristics of zirconia (Y-TZP) articulating against itself were investigated using a ring-on-disc testing device according to ISO 6474. The high wear rate emphasized that medical-grade zirconia (Y-TZP according to ISO/ DIS 13356) should not be used for acetabular cups.

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Wear characteristics of sliding pairs of zirconia (Y-TZP) for hip endoprostheses
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 17, Issue 22, November 1996, Pages 2157-2162
Authors
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us