Abstract
Ultra-high molecular weight polyethylene (UHMWPE) wear continues to be an important factor in the long-term survivability of orthopedic implants. As established in Chapter 28, periprosthetic osteolysis occurs secondary to the generation of UHMWPE wear debris in total hip arthroplasty (THA). In the last decade, efforts have been made to increase the wear resistance of UHMWPE. Highly cross-linked UHMWPE (HXLPE) was introduced in THA more than 15 years ago and more recently, adopted in total knee arthroplasty. UHMWPE wear volume and wear patterns must be fully evaluated in order to understand historical UHMWPE wear processes; to evaluate the efficacy of HXLPE; and to analyze future UHMWPE formulations that attempt to improve the clinical performance of UHMWPE. The purpose of this chapter is to describe the advantages and drawbacks of microCT methods for evaluating wear and damage in UHMWPE.
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