Moghadam Mohamadreza Nassajian, Abdel-Sayed Philippe, Camine Valérie Malfroy, Pioletti Dominique P
Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Laboratory of Biomechanical Orthopedics, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
J Biomech. 2015 Jan 21;48(2):370-4. doi: 10.1016/j.jbiomech.2014.11.008. Epub 2014 Nov 25.
Several studies have reported an increase of temperature in cartilage submitted to cyclic sinusoidal loading. The temperature increase is in part due to the viscous behavior of this tissue, which partially dissipates the input mechanical energy into heat. While the synovial fluid flow within the intra-articular gap and inside the porous cartilage is supposed to play an important role in the regulation of the cartilage temperature, no specific study has evaluated this aspect. In the present numerical study, a poroelastic model of the knee cartilage is developed to evaluate first the temperature increase in the cartilage due to dissipation and second the impact of the synovial fluid flow in the cartilage heat transfer phenomenon. Our results showed that, the local temperature is effectively increased in knee cartilage due to its viscous behavior. The synovial fluid flow cannot significantly preventing this phenomenon. We explain this result by the low permeability of cartilage and the moderate fluid exchange at the surface of cartilage under deformation.
多项研究报告称，承受周期性正弦载荷的软骨温度会升高。温度升高部分归因于该组织的粘性行为，这种行为会将输入的机械能部分耗散为热量。虽然关节间隙内和多孔软骨内部的滑液流动被认为在软骨温度调节中起重要作用，但尚无具体研究评估这一方面。在本数值研究中，建立了膝关节软骨的多孔弹性模型，首先评估由于耗散导致的软骨温度升高，其次评估滑液流动对软骨传热现象的影响。我们的结果表明，由于膝关节软骨的粘性行为，其局部温度确实会升高。滑液流动并不能显著阻止这种现象。我们通过软骨的低渗透性以及变形时软骨表面适度的液体交换来解释这一结果。
