Nano Biomedicine
Online ISSN : 2185-4734
Print ISSN : 1883-5198
ISSN-L : 1883-5198
ORIGINAL ARTICLES
A Comparative Hip Joint Simulator Study of the Wear, Debris and Metal Ion Release of CoCrMo / CoCrMo and CoCrMo / CL-UHMWPE Couplings
Masami HASHIMOTOKazumi HAYASHISatoshi KITAOKA
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2013 Volume 5 Issue 1 Pages 25-30

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Abstract

The wear behavior of a femoral head made of CoCrMo against an acetabular cup made of CoCrMo (CoCrMo/CoCrMo coupling) was compared with that of a femoral head made of CoCrMo against an acetabular cup made of cross link (CL) – ultra high molecular weight polyethylene (UHMWPE) (CoCrMo/CL-UHMWPE coupling) using a hip joint simulator. The wear amount of CoCrMo/CoCrMo coupling was much lower than that of CoCrMo/CL-UHMWPE coupling. However, the wear debris generated from CoCrMo/CoCrMo coupling was consisted of a large number of wear particles with 100 nm size, resulted in increasing the total surface area of the metal. Therefore, Co and Cr ions drastically dissolved from CoCrMo/CoCrMo coupling in the serum after 50 × 104 cycles. Therefore, it is necessary for further research of metal on metal total replacement joints to improve materials and design carefully.

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© 2013 Nano Biomedical Society
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