Aseptic Loosening in Arthroplasty
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.
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6Practised by MCQ
10What is the most common cause of late failure in total hip and knee arthroplasty?
mcqWhich mechanism primarily leads to osteolysis in aseptic loosening?
mcqWhat is a significant risk factor for aseptic loosening in arthroplasty?
mcqWhich of the following is NOT a mechanism associated with aseptic loosening?
mcqIn which Gruen zone is radiolucency most indicative of femoral stem loosening?
mcqWhat is the primary management strategy for patients with aseptic loosening of total joint implants?
mcqWhat kind of implant is most commonly associated with stress shielding?
mcqWhich cytokine is primarily involved in the osteolytic process due to particle-induced macrophage activation?
mcqWhich of the following factors can contribute to micromotion at the bone-implant interface?
mcqWhat characteristic radiographic change is typically seen in stress shielding?