Related Experiment Video
Updated: Feb 27, 2026
Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
Published on: February 17, 2023
Frontal alignment in total knee arthroplasty. Comparative study between radiographic measurement and surgical
D Hernandez-Vaquero1, A Noriega-Fernandez2, A Suarez-Vazquez1
1Departamento de Cirugía, Facultad de Medicina y Ciencias de la Salud, Universidad de Oviedo, Oviedo, España; Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario San Agustín, Avilés, España.
Objective:
To establish the concordance between angulation of the femoro-tibial mechanical axis measured with x-rays and surgical navigation in both the pre and postoperative period after a total knee arthroplasty (TKA) was implanted.
Material And Method:
Pre and postoperative measurements were analyzed in 88 TKA of the same model and all performed with the same surgical navigation system. The mechanical frontal angle (MFA) and femoro-tibial anatomic angle were measured before and after the TKA. The angulation was digitally measured with a teleradiography. In the navigation, the femoro-tibial angle at rest, forced varus and valgus were registered and the average of these three measurements was calculated.
Results:
The mean preoperative MFA measured on the radiograph was 4.55°. The mean of the same angle measured on the postoperative radiograph was 1.72°, (p=0.05). The mean of the MFA measured with navigation before TKA was 3.12° and after the implant with navigation was 0.53 (P=.013). The concordance coefficient between the MFA in teleradiography and in navigation was 0.869 (P<.001) preoperatively and 0.709 postoperatively (P=.017).
Conclusions:
We found a strong concordance between radiographic and surgical navigation measurements of the MFA. This may imply that teleradiography is not necessary when using surgical navigation in TKA.
