Design and evaluation of instrumented smart knee implant

IEEE Transactions on Bio-medical Engineering
Shaban AlmouahedChristian Roux

Abstract

The goal of ligament balancing in total knee arthroplasty (TKA) is to distribute the tibiofemoral compressive forces symmetrically between the medial and lateral compartments of a well-aligned prosthetic knee, as well as to reestablish a rectangular and identical tibiofemoral gap in both flexion and extension. Nowadays, the proper alignment of knee mechanical axis and the perfect equalization of flexion and extension gaps are ensured by computer-assisted TKA (CATKA). Nevertheless, any residual imbalance of collateral ligaments at the time of surgery can lead to an excessive imbalance in the postoperative period during the weight-bearing activities, which subject the knee collateral ligaments to increased loading. This in turn leads to an accelerated polyethylene wear, and consequently, to early failure of TKA. The instrumented tibial implant proposed in this study can postoperatively assess and monitor the progression of residual postoperative ligament imbalance of a prosthetic knee, which is perfectly aligned during the surgery thanks to CATKA, via a center-of-pressure (COP)-based approach. This approach depends on the measurement of relative displacement of COP position during the postoperative period with respect to a refere...Continue Reading

References

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Citations

Aug 6, 2014·The Journal of Arthroplasty·Conrad B IvieB Sonny Bal
Jul 24, 2015·Expert Review of Medical Devices·João N D TorrãoJorge A F Ferreira
Aug 22, 2013·IEEE Transactions on Bio-medical Engineering·Arash AramiKamiar Aminian
Sep 2, 2010·IEEE Transactions on Bio-medical Engineering·Cyril LahuecChristian Roux
Sep 21, 2013·Journal of Biomechanics·Marco P Soares dos SantosT Oliveira
Oct 27, 2017·Annals of Biomedical Engineering·Arash AramiKamiar Aminian
Dec 12, 2019·Journal of Intelligent Material Systems and Structures·Mohsen SafaeiSteven R Anton
Oct 10, 2018·Smart Materials & Structures·Mohsen SafaeiSteven R Anton
May 1, 2021·Cell Reports. Physical Science·Qingshen JingSohini Kar-Narayan

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