Abstract
Wear of the polyethylene liner is a frequent complication of total knee arthroplasty (TKA), which may lead to metallosis. The polyethylene wear usually occurs through delamination of the superficial layers of the liner into flakes that are shed within the joint. 1-5 Assessment of the degradation of the polyethylene liner is generally made by approximate assessment of its thickness on plain radiographs. More recently, sonography has been shown to also be a valuable method for evaluation of polyethylene wear in knee prosthesis. 6,7 Here we report a new sonographic sign of polyethylene wear in TKA with histologic correlation.
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