Clinical Outcome of Total Knee Arthroplasty With Medial Pivot Prosthesis: A Comparative Study Between the Cruciate Retaining and Sacrificing

The purpose of this study is to evaluate results after total knee arthroplasty using a medial pivot prosthesis with the posterior cruciate ligament (PCL)-retaining and PCL-sacrificing techniques. The PCL was retained in 67 knees and sacrificed in 70 knees. The mean Knee Society knee score increased from 59.6 before surgery to 91.5 at the last follow-up, and the mean function score increased from 53.6 to 85.4. The mean preoperative femorotibial angle was varus 4.1°, which corrected to valgus 5.8° after surgery. The increased knee and function score did not vary significantly between the cruciate-retaining and cruciate-sacrificing groups (P > .108), nor did the mean preoperative and postoperative femorotibial angle (P > .140). The clinical results of total knee arthroplasty with a medial pivot prosthesis were satisfactory, whether the PCL was retained or sacrificed.