Osteolysis & Wear in Arthroplasty
Biologic response to wear particles (polyethylene > metal/cement) drives periprosthetic osteolysis via macrophage cytokine cascade. Risk factors: conventional PE, thin liners, malalignment, edge-loading, high activity, third-body wear. Radiology: progressive radiolucent lines, endosteal scalloping, cystic defects; CT helpful for pelvic osteolysis; metal artifact reduction MRI. Prevention: highly crosslinked PE (HXLPE), ceramic heads, proper component position, larger heads with caution for trunn...
Related to
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Practised by MCQ
10What is the primary biological mechanism driving periprosthetic osteolysis in arthroplasty?
mcqWhich particle size is most biologically active in driving osteolysis?
mcqWhich of the following is NOT a risk factor for osteolysis in arthroplasty?
mcqIn which radiographic zone would you expect to see signs of impending loosening of the acetabular component?
mcqWhat is the role of RANKL in periprosthetic osteolysis?
mcqWhich imaging modality is particularly useful for assessing pelvic osteolysis?
mcqWhat is the recommended management step if periprosthetic osteolysis is suspected?
mcqWhich material is associated with the least biologic activity and therefore less risk of osteolysis?
mcqWhat is the purpose of using larger heads in hip arthroplasty?
mcqWhat is the role of osteoprotegerin (OPG) in the context of osteolysis?