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Review Question - QID 7014

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QID 7014 (Type "7014" in App Search)
Osteolysis after total hip arthroplasty with polyethylene acetabular bearings is most closely correlated with which of the following risk factors?

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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