Bicondylar knee replacements

Although knee arthroplasty enjoys a remarkable clinical track record, problems with wear and fatigue damage of UHMWPE continue to limit the longevity of both unicondylar and bicondylar knee replacement components. Unlike in the hip, where radiographic techniques have been developed to quantify in vivo wear rates, there currently exist no standard and widely accepted techniques for tracking the clinical performance of UHMWPE in patients with knee replacement. Thus, today the most effective way to evaluate the in vivo performance of UHMWPE continues to be the analysis of retrieved components from revision surgery or from autopsy donations. 

Family of unicondylar and bicondylar knee prostheses designed at the HSS by Insall, Ranawat, and Walker during the 1970s. (Reprinted with [jermission from Walker RS. 1977. Human joints and their artificial replacements. Springfield, IL CC Thomas Publisher.)... 

Using the Hood method, what is the maximum total damage score for the articulating surface of a bicondylar, cruciate-sparing total knee replacement, not including the patellar component ... 

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