Analysis of the Relationship between Posterior Cruciate Ligament Preservation and Femoral Component Sizein Total Knee Arthroplasty

Abstract

Purpose : How PCL preservation affects the selection of femoral component size in total knee arthroplasty. Materials and Methods: One hundred and fifty-seven patients, two-hundred and twenty-two knees, underwent total knee arthroplasties with Scorpio®. One hundred and eighteen knees underwent PCLpreserving procedures, and one-hundred and four knees underwent PCL-substituting procedures. For minimization of error, we performed soft tissue balancing and then bone cutting by a Linker system with certain posterior slope (≤3˚). We compared the sizes of the femoral components between the PCL-preserving and PCL-substituting procedures in order to determine how flexion gap differences affect femoral component sizes (Wilcoxon signed rank test). Results : With a certain minimal posterior slope (≤3˚), the PCL-preservation procedure led to selection of a 2.4 mm smaller femoral component than the PCL substituting procedure (p＜0.05). Conclusion : Selection of femoral component size was affected by PCL preservation, and the size of the femoral component was decreased in the PCL preservation group.