In vivo contact biomechanics in the trapeziometacarpal joint using finite deformation biphasic theory and mathematical modelling.pdfVIP

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In vivo contact biomechanics in the trapeziometacarpal joint using finite deformation biphasic theory and mathematical modelling.pdf

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In vivo contact biomechanics in the trapeziometacarpal joint using finite deformation biphasic theory and mathematical modelling.pdf

Medical Engineering and Physics 38 (2016) 108–114 Contents lists available at ScienceDirect Medical Engineering and Physics journal homepage: /locate/medengphy In vivo contact biomechanics in the trapeziometacarpal joint using ?nite deformation biphasic theory and mathematical modelling Benjamin Dourthe a,?, Priscilla D’Agostino a, Filip Stockmans a,b, Faes Kerkhof a, Evie Vereecke a a KU Leuven, Department of Development Regeneration @ Kulak, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium b AZ Groeninge, Campus Loofstraat, Loofstraat 43, 8500 Kortrijk, Belgium article info Article history: Received 6 March 2015 Revised 11 September 2015 Accepted 3 November 2015 Keywords: Biomechanics Trapeziometacarpal joint TMC joint Mathematical modelling Contact patterns in vivo Medical imaging Cartillage Osteoarthritis abstract The assessment of the contact biomechanics in the trapeziometacarpal (TMC) joint during functional tasks represents a relevant way to obtain a better understanding of the onset of osteoarthritis (OA). CT scans of the hand region of 20 female volunteers were taken in relaxed neutral, lateral key pinch and power grasp con?guration. 3D models of the ?rst metacarpal (MC1) and the trapezium were created. The articular area of each bone was quanti?ed and a mathematical model was developed in Matlab to evaluate the projected contact area and stress distribution of each bone. The articular areas of the MC1 and the trapezium presented no signi?cant difference. A slightly smaller projected contact area was calculated for the trapezium compared to the MC1. Similar amounts of stress were reported in the neutral and lateral pinch con?gurations. The highest stress levels were observed during power grasp. Very consistent results for high stress location on the volar/radial articular sub-region were found in the neutral and power grasp con?gurations. More variation was reported during lateral pinch. The mathematical model presented in this paper offers the possibility to