Ten-year Results Comparing Posterior Cruciate-retaining Versus Posterior Cruciate-substituting Total Knee Arthroplasty

We compared the 10-year survival rates and clinical outcomes of posterior cruciate-retaining (CR) versus posterior cruciate-substituting (CS) total knee arthroplasty (TKA), using the Genesis II knee system (Smith and Nephew, Memphis, TN).  Our institutional database identified patients undergoing a primary knee with the Genesis II system between 1995 and 2000. These patients were followed for an average of 12.3 years (range 10.2-14.4 years). There were 143 (34.5%) CR and 271 (65.5%) CS implants. No significant difference in 10-year survivorship was noted between the two cohorts. The postoperative clinical scores (KSCRS, WOMAC, SF-12) and knee ROM were significantly better for the CS cohort. In this large, long-term, single-implant prospective study, CS performed better than CR in terms of clinical scores and range of motion.