Design and evaluation of an actuated knee implant for postoperative ligament imbalance correction

Andrea Collo 1 Shaban Almouahed 2, 3 Philippe Poignet 1 Chafiaa Hamitouche-Djabou 3, 2 Eric Stindel 3
1 DEXTER - Conception et commande de robots pour la manipulation
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
2 ITI - Département Image et Traitement Information
3 LaTIM - Laboratoire de Traitement de l'Information Medicale
Abstract : In Total Knee Arthroplasty (TKA), the collateral ligament tensioning stage cannot be standardised for all patients and relies heavily on the surgeon's experience and perception. Intraoperative inaccuracies are practically unavoidable and may give rise to severe postoperative complications, leading to the need for revision surgery already a few years after primary TKA. This work proposes a novel instrumented tibial component able to detect collateral ligament laxity conditions right after primary TKA and, if needed, to compensate for them in the postoperative period. A miniaturised actuation system, designed to be embedded in the tibial baseplate, was initially evaluated by means of 3D simulations and then fabricated as a full-scale prototype. Stability and force sensors tests carried out on a knee simulator allowed to assess the effectiveness of the proposed design under normal working conditions and provided valuable insights for future work and improvements.
Keywords : Knee ligament imbalance Instrumented knee prosthesis Miniaturised mechanical device Actuation system
Document type :
Journal articles
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-01348647
Contributor : Isabelle Gouat <>
Submitted on : Monday, July 25, 2016 - 1:27:43 PM
Last modification on : Thursday, October 17, 2019 - 12:35:31 PM

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LIRMM | CNRS | UNIV-BREST | INSTITUT-TELECOM | DEXTER | LATIM_TB | MIPS | UNIV-MONTPELLIER | IMT-ATLANTIQUE | LATIM

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Andrea Collo, Shaban Almouahed, Philippe Poignet, Chafiaa Hamitouche-Djabou, Eric Stindel. Design and evaluation of an actuated knee implant for postoperative ligament imbalance correction. Medical Engineering and Physics, Elsevier, 2016, 38 (4), pp.326-332. ⟨10.1016/j.medengphy.2016.01.002⟩. ⟨lirmm-01348647⟩

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