Computerized tomography scout view for determining distal femoral resection angle in intramedullary instrumentation of total knee arthroplasty

This study aims to investigate the results of distal femoral resection by determining the difference between mechanical and anatomical axes of femur using computerized tomography (CT) scout views in pre-operative planning of total knee arthroplasty. CT scout view of the lower extremities was taken before and after the operation in 16 patients undergoing total knee arthroplasty. Distal femoral resection was performed according to the previously determined ideal resection angle (IRA) using intramedullary instrumentation. At post-operative scanogram, femoral component deviation (FCD) was measured. The results were statistically analyzed. The average IRA was 6.95 (5–9) degrees. At post-operative measurements, the average FCD was 0.63 (0–3) degrees. CT scout films improve the accuracy in distal femoral resection and femoral component alignment.