Bearing Surfaces
A 68-year-old man presents with progressive groin pain 15 years after primary THA. He has been active with regular golf and hiking. Radiographs show well-fixed components but progressive osteolytic lesions around the acetabulum and proximal femur. The polyethylene liner appears thin with asymmetric wear. Laboratory inflammatory markers are normal and aspiration rules out infection. Regarding polyethylene wear in joint arthroplasty:
Mark each as TRUE or FALSE
Ultra-high molecular weight polyethylene (UHMWPE) wear generates submicron particles that trigger a ...
Wear modes include adhesive wear (surface material transfer), abrasive wear (hard particles scratchi...
Larger wear particles (greater than 10 microns) cause the most osteolysis; metal heads produce less ...
Highly crosslinked polyethylene (HXLPE) is created by gamma irradiation (5-10 Mrad) followed by ther...
Factors increasing wear include malalignment, increased activity level, larger head sizes (in hip), ...
Answer the questions to see explanations
Click T (True) or F (False) for each option