Kinematic Analysis of Total Knee Arthroplasty during Gait
Vance E., Jenkins S., et al. · Journal of Orthopaedic Research
Abstract
This study investigates the in-vivo kinematics of a novel knee design through high-frequency motion capture analysis.
Methodology
A cohort of 24 patients underwent high-frequency (250Hz) optoelectronic motion capture and dual-plane dynamic fluoroscopy during treadmills and stair-climb gait. Kinematic parameters including femoral rollback, axial rotation, and patellofemoral translation were computed using Patient-Specific CAD alignment.
Findings
The novel multi-axis cruciate-retaining implant design successfully reduced paradoxical anterior femoral slide by 68% compared to standard designs, achieving near-native femoral rollback. Flexion range increased by an average of 14.2 degrees with improved patellar track stability.
Conclusion
Cruciate-retaining multi-axis implants offer superior sagittal stability and natural flexion paths, significantly improving patient mobility, patellar tracking, and long-term joint wear characteristics.