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Patient weight
8%
65/834
Femoral head bearing material
18%
150/834
Linear wear rate
66%
552/834
Decreased femoral offset
4%
36/834
Increased femoral offset
3%
25/834
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The development of osteolysis appears to be multifactorial. Patient activity, component positioning, polyethylene oxidation level, and bearing surface all appear to contribute. They contribute, however, by increasing the rate of wear. Therefore, the one variable that correlates closest with the likelihood of osteolysis (and the magnitude of osteolysis) is the wear rate of the bearing couple. Wear can be measured linearly or volumetrically. Both correlate with the development of osteolysis.
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