Damage of the Co-Cr-Mo Femoral Head of a Total Hip Prosthesis and Its Influence on the Wear Mechanism

Co-Cr alloy is one of the most used alloys for artificial hip joints and offers a good combination of mechanical propertics. corrosion resistance and biocompatibility. To increase its resistance to wear are commonly used hard coating thin layers of Co-Cr-Mo. Analyzing a femoral head ofa Co-Cr modula...

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Bibliographic Details
Published in:Journal of materials science and engineering. A 2011-10, Vol.1 (5), p.662-670
Main Authors: Capitanu, L, Badita, L L, Bursuc, D C
Format: Article
Language:chi ; eng
Subjects:
Abrasion
Abrasion resistance
Biomedical materials
Cobalt
Peeling
Prosthetics
Surgical implants
Wear resistance
人工髋关节
假体
损伤
磨损机理
股骨头
钴
钼
铬
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Summary:Co-Cr alloy is one of the most used alloys for artificial hip joints and offers a good combination of mechanical propertics. corrosion resistance and biocompatibility. To increase its resistance to wear are commonly used hard coating thin layers of Co-Cr-Mo. Analyzing a femoral head ofa Co-Cr modular total hip prosthesis coated Co-Cr-Mo, we found peeling coating, abrasion of the substrate and hardening of abrasion traces against subsurface initial hardness. This paper presents an analysis by the Student test of the microhardness peeling a portion of a scratch from a femoral head explant covered with Co-Cr-Mo, and that demonstrate the transformation of wear mechanism from three bodies abrasion in two bodies abrasion.
ISSN:2161-6213