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

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(R). One hundred and eighteen knees underwent PCL-preserving 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 (< or = 3 degrees). 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 (< or = 3 degrees), 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.