Design and evaluation of an actuated knee implant for postoperative ligament imbalance correction - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Journal Articles Medical Engineering & Physics Year : 2016

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

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.
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Dates and versions

lirmm-01348647 , version 1 (25-07-2016)

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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 & Physics, 2016, 38 (4), pp.326-332. ⟨10.1016/j.medengphy.2016.01.002⟩. ⟨lirmm-01348647⟩
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