Most common cause of late arthroplasty failure. Pathophysiology: particle-induced macrophage activation → cytokine release → osteolysis. Risk factors: polyethylene wear, malalignment, micromotion, poor cementing technique. Clinical: pain, progressive radiolucent lines, migration. Management: revision arthroplasty with improved fixation and bearing surfaces.
What is the most common cause of late failure in total hip and knee arthroplasty?
Which mechanism primarily leads to osteolysis in aseptic loosening?
What is a significant risk factor for aseptic loosening in arthroplasty?
Which of the following is NOT a mechanism associated with aseptic loosening?
In which Gruen zone is radiolucency most indicative of femoral stem loosening?
What is the primary management strategy for patients with aseptic loosening of total joint implants?
What kind of implant is most commonly associated with stress shielding?
Which cytokine is primarily involved in the osteolytic process due to particle-induced macrophage activation?
Which of the following factors can contribute to micromotion at the bone-implant interface?
What characteristic radiographic change is typically seen in stress shielding?
