Development of a force amplitude- and location-sensing device designed to improve the ligament balancing procedure in TKA

Article Article scientifique Article Development of a force amplitude- and location-sensing device designed to improve the ligament balancing procedure in TKA eng 2005 author Crottet Denis author Maeder Thomas 83981 author Fritschy Daniel 24486 author Bleuler Hannes author Nolte Lutz P author Pappas Ion P 1609-1611 10.1109/TBME.2005.851504 16189974 0018-9294 To improve the ligament balancing procedure during total knee arthroplasty a force-sensing device to intraoperatively measure knee joint forces and moments has been developed. It consists of two sensitive plates, one for each condyle, a tibial base plate and a set of spaces to adapt the device thickness to the patient-specific tibiofemoral gap. Each sensitive plate is equipped with three deformable bridges instrumented with thick-film piezoresistive sensors, which allow accurate measurements of the amplitude and location of the tibiofemoral contact forces. The net varus-valgus moment is then computed to characterize the ligamentous imbalance. The developed device has a measurement range of 0-500 N and an intrinsic accuracy of 0.5% full scale. Experimental trials on a plastic knee joint model and on a cadaver specimen demonstrated the proper function of the device in situ. The results obtained indicated that the novel force-sensing device has an appropriate range of measurement and a strong potential to offer useful quantitative information and effective assistance during the ligament balancing procedure in total knee arthroplasty. Arthroplasty, Replacement, Knee/instrumentation/methods Cadaver Computer Simulation Computer-Aided Design Equipment Design Equipment Failure Analysis Humans Knee Joint/physiopathology/surgery Ligaments/physiopathology/surgery Models, Biological Prosthesis Fitting/instrumentation/methods Stress, Mechanical Transducers, Pressure Dewey 617 57 Département de chirurgie 222 false 74 Chirurgie orthopédique et traumatologique 98 IEEE transactions on biomedical engineering 52 9 66a7f6de-52a2-486c-afce-f792d41c1075 Article (Published version) Restricted 01495705.pdf 989886 application/pdf restrictedAccess Faculté de médecine / Section de médecine clinique / Département de chirurgie

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Development of a force amplitude- and location-sensing device designed to improve the ligament balancing procedure in TKA	IEEE transactions on biomedical engineering			2005	621	0

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Maeder, Thomas