Record number :
1406433
Title of article :
Effect of head size on wear properties of metal-on-metal bearings of hip prostheses, and comparison with wear properties of metal-on-polyethylene bearings using hip simulator
Author/Authors :
Okazaki، نويسنده , , Yoshimitsu، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2014
Pages :
12
From page :
152
To page :
163
Abstract :
The effects of articular head size on the wear losses of the metal insert and articular head for a metal-on-metal bearing were examined using a hip simulator manufactured to satisfy ISO 14242-1. The wear properties of metal-on-metal and metal-on-polyethylene bearings were also compared under the same conditions. The total wear losses of the metal insert and articular head decreased with increasing diameter of the metal insert in the range from 28 to 44 mm. The total wear loss was greater for a diameter of 48 mm than for a diameter of 44 mm. When the articular metal insert diameter was smaller than 44 mm, the wear loss was reduced because the contact surface pressure increased with increasing metal insert diameter. However, the increase in wear loss observed for the 48-mm-diameter insert might have been due to the considerable increase in the rotation moment with increasing insert diameter. The tendency of decreasing contact pressure calculated using the Hertzian contact stress equation nearly conformed to the change in wear loss. On the other hand, the wear loss of an artificial hip joint consisting of a cross-linked ultrahigh-molecular-weight polyethylene insert (UHMWPE) and a Co–Cr–Mo articular head was small.
Keywords :
Metal-on-metal bearing , Metal-on-polyethylene bearing , Artificial hip joint , wear property , contact pressure , Hip simulator
Journal title :
Journal of the Mechanical Behavior of Biomedical Materials
Journal title :
Journal of the Mechanical Behavior of Biomedical Materials
Serial Year :
2014
Link To Document :
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