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In vivo knee joint loading and kinematics – the interplay between movement and loading at the patello-femoral and tibio-femoral joints.

Subject Area Orthopaedics, Traumatology, Reconstructive Surgery
Term from 2019 to 2023
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 417498832
 
Final Report Year 2023

Final Report Abstract

While total knee arthroplasty is a generally very successful treatment for knee osteoarthritis, about 20% of patients later turn out to be dissatisfied with their functional post-operative outcome. A substantial patient population suffers from not yet fully understood post-operative symptoms, such as anterior knee pain. Progress towards solving the remaining problems of knee joint replacement requires a better understanding of the mechanical interaction between the patello-femoral and tibio-femoral joints. A tight collaboration between the Charité-Berlin and the ETH-Zürich allowed us to capture a worldwide unique dataset of synchronized in vivo tibio-femoral loads and internal joint kinematics. The simultaneous measurement of these two key parameters, along with whole body motion, ground reaction forces and muscle activity, provided the basis for the project, which aimed to gain an understanding of the underlying knee mechanics in a replaced joint. In this project we have quantified the patient-specific patellofemoral loads, and how they relate to the dynamic movements within the patello-femoral and tibio-femoral joints. The musculoskeletal loading determined through advanced subject specific models serve as a benchmark for later analyses of other implants or patient kinematic data, and form the technological foundation to evaluate other implant designs and implantation methods, beyond the validated instrumented implants used here.

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