In-vivo analysis of flexion axes of the knee: Femoral condylar motion during dynamic knee flexion

Clinical Biomechanics
Yong FengAndrew Freiberg

Abstract

Transepicondylar axis and geometrical center axis are widely used for investigation of the knee kinematics and component alignment in total knee arthroplasty. However, the kinematic characteristics of these knee axes are not well defined in literature. This study investigated the femoral condylar motion during a dynamic flexion of the knee using different flexion axes. Twenty healthy knees (10 males and 10 females) were CT scanned to create 3D anatomic models. The subjects performed a single leg flexion from full extension to maximum flexion while the knees were imaged using fluoroscopes. The femoral condyle translations in anterior-posterior and proximal-distal directions were described using clinical transepicondylar axis, surgical transepicondylar axis and geometrical center axis. The subjects achieved -9.4° (SD 3.0°) hyperextension at full extension and 116.4° (SD 9.0°) at maximum flexion of the knee. The anterior-posterior translations of the three flexion axes were different for the medial condyle, but similar for the lateral condyle. Substantial variations of the condylar motion in proximal-distal direction were measured along the flexion path using these axes. While the surgical transepicondylar axis maintained condyle ...Continue Reading

References

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Citations

Dec 16, 2017·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Mohammad KiaCarl W Imhauser
Feb 6, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Sho HokariNaoto Endo
Sep 5, 2021·Archives of Orthopaedic and Trauma Surgery·Zhenming ZhangGuoan Li

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