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Review Question - QID 8400

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QID 8400 (Type "8400" in App Search)
In total knee arthroplasty, in vitro testing has shown that cross-linking can diminish the rate of polyethylene wear by 30% to 80%. What other change in material properties is possible when polyethylene is highly cross-linked?

Increased ductility

15%

191/1236

Increased wettability

5%

65/1236

Diminished fatigue strength

63%

775/1236

Decreased resistance to abrasive wear

16%

193/1236

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The most important concern regarding highly cross-linked polyethylene relates to decreased mechanical properties. Cross-linking results in reduced ductility, tensile strength, and fatigue crack propagation resistance. These problems have not been identified as causing implant failure in most recent clinical trials, but remain the most important mechanical issues associated with current material processing methods.

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