A Prospective, Randomized Comparison of Posterior Stabilized Versus Cruciate-Substituting Total Knee Arthroplasty: A Preliminary Report With Minimum 2-Year Results

We compared 56 patients who received a PS post/cam tibial insert and 55 patients who received a more congruent anterior-lipped tibial insert. We hypothesized that clinical outcomes would be equivalent and that tourniquet time and intraoperative blood loss would differ. The mean follow-up is 45 months (30–57 months). Clinical and radiographic outcomes were equivalent for both groups, except that male PS patients received significantly more transfusions than male CS patients (P < .039) and tourniquet time was significantly longer for all patients in the PS group (P < .015). At the minimum 2-year follow-up in this ongoing study, the results demonstrate equivalent functional and radiographic outcomes of the 2 devices, and significant differences in the perioperative findings of transfusion rates and tourniquet times.