Posterior stabilized knee arthroplasty: an assessment of bone resection

Fifty-five anatomic saw bones were cut using the manufactures instruments for the five implant designs currently utilized at the Hospital for Special Surgery (Insall-Burstein II, Genesis II, PFC Sigma, Optitrak, and Nex-Gen Legacy). The quantity of intercondylar femoral bone removed, following posterior stabilized total knee arthroplasty with these five designs, was determined using a fast cast wax mold technique. Genesis II and Optitrak removed significantly less bone in small anatomic saw bones compared with the PFC Sigma, Nex-Gen Legacy and Insall-Burstein II designs. Genesis II removed significantly less bone in the large bones compared with the Optitrak, PFC Sigma, Nex-Gen Legacy and Insall-Burstein II designs.