Polyethylene Wear in TKA
Primary driver of late osteolysis and aseptic loosening in TKA. Wear modes: adhesive/abrasive; delamination & pitting with high contact stress/oxidation in older PE. Risk factors: malalignment/malrotation, thin inserts, tibial backside micromotion, third-body debris. Prevention: HXLPE, polished tibial trays, correct alignment, adequate insert thickness. Management: exclude PJI; bearing exchange + synovectomy vs full revision depending on fixation and bone loss.
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10What is the primary driver of late osteolysis and aseptic loosening in total knee arthroplasty (TKA)?
mcqWhich of the following is NOT a recognized mode of wear for polyethylene in TKA?
mcqWhat is the recommended minimum thickness for a tibial polyethylene insert in TKA to minimize wear?
mcqWhich factor is considered the most important modifiable risk factor for polyethylene wear in TKA?
mcqWhich of the following materials has been developed to reduce wear in polyethylene components for TKA?
mcqWhat is the primary mechanism by which polyethylene wear particles lead to osteolysis in TKA?
mcqWhich sterilization method has been associated with accelerated oxidative degradation of polyethylene in TKA?
mcqIn the management of established osteolysis in TKA, what is the first step that should be taken?
mcqWhich of the following options is NOT a recommended prevention strategy for polyethylene wear in TKA?
mcqWhat is the consequence of inadequate tibial insert thickness in revision TKA?