Outcome measures
Within 7 days after operation, all patients underwent computed tomography and the following angles were measured to evaluate the position of the knee prosthesis: (1) coronal tibial component angle (CTCA, neutral=90°), the angle between the base tangent of the tibial plateau and the medial side of the tibial mechanical axis; (2) coronal femoral component angle (CFCA, neutral=90°), the angle between the base tangent of the femoral prosthesis and the outside of the femoral mechanical axis; (3) sagittal tibial component angle (STCA, neutral=90°), the posterior angle of the tangent line between the base of the tibial plateau and the anatomical axis of the proximal tibia; and (4) sagittal femoral component angle (SFCA, neutral=90°), the posterior angle between the tangent line of the base of the femoral prosthesis and the anatomical axis of the distal femur (Fig. Postoperative computed tomography scans. (a) Measurement of the coronal femoral component angle. (b) Measurement of the coronal tibial component angle. (c) Measurement of the sagittal femoral component angle. (d) Measurement of the sagittal tibial component angle.A total of 123 patients were evaluated based on the clinical and imaging results as 10 patients in the RAS group refused to participate in follow-up evaluation and 11 patients in the CON group refused to participate in the follow-up evaluation.