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Biomechanical characterization of cartilages by a novel approach of blunt impact testing

F. Varga, M. Drzík, M. Handl, J. Chlpík, P. Kos, E. Filová, M. Rampichová, A. Necas, T. Trc, E. Amler

. 2007 ; 56 (Suppl 1) : S61-S68.
. 2007 ; 56 (Suppl 1) : S61-S68.

Language English Country Czech Republic

Document type Journal Article, Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc13034084

The present article introduces a novel method of characterizing the macromechanical cartilage properties based on dynamic testing. The proposed approach of instrumented impact testing shows the possibility of more detailed investigation of the acting dynamic forces and corresponding deformations within the wide range of strain rates and loads, including the unloading part of stress-strain curves and hysteresis loops. The presented results of the unconfined compression testing of both the native joint cartilage tissues and potential substitute materials outlined the opportunity to measure the dissipation energy and thus to identify the initial mechanical deterioration symptoms and to introduce a better definition of material damage. Based on the analysis of measured specimen deformation, the intact and pathologically changed cartilage tissue can be distinguished and the differences revealed.

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$a Varga, Ferdinand, $u Department of Biophysics, Second Faculty of Medicine, Charles University, Prague, Czech Republic. ferdinand.varga@lf2.cuni.cz $d 1978- $7 mzk2007394831
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$a Biomechanical characterization of cartilages by a novel approach of blunt impact testing / $c F. Varga, M. Drzík, M. Handl, J. Chlpík, P. Kos, E. Filová, M. Rampichová, A. Necas, T. Trc, E. Amler
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$a The present article introduces a novel method of characterizing the macromechanical cartilage properties based on dynamic testing. The proposed approach of instrumented impact testing shows the possibility of more detailed investigation of the acting dynamic forces and corresponding deformations within the wide range of strain rates and loads, including the unloading part of stress-strain curves and hysteresis loops. The presented results of the unconfined compression testing of both the native joint cartilage tissues and potential substitute materials outlined the opportunity to measure the dissipation energy and thus to identify the initial mechanical deterioration symptoms and to introduce a better definition of material damage. Based on the analysis of measured specimen deformation, the intact and pathologically changed cartilage tissue can be distinguished and the differences revealed.
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$a Držík, Milan $u International Laser Centre, Bratislava, Slovakia $7 _BN002280
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$a Handl, Milan, $u Orthopedic Clinic, Second Faculty of Medicine, Charles University, Prague, Czech Republic $d 1961- $7 xx0064271
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$a Chlpík, Juraj $u International Laser Centre, Bratislava, Slovakia $7 _AN037744
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$a Rampichová, Michala $u Department of Biophysics, Second Faculty of Medicine, Charles University, Prague, Czech Republic; Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic $7 xx0171325
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$a Nečas, Alois, $u Department of Surgery and Orthopedics, Small Animal Clinic, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic $d 1966- $7 mzk2004229096
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