tailieunhanh - BIOMATERIALS – PHYSICS AND CHEMISTRY_2

Tham khảo sách 'biomaterials – physics and chemistry_2', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Part 2 Biomechanical and Physical Studies 10 Biomechanical Properties of Synovial Fluid in Between Peripheral Zones of Articular Cartilage Miroslav Petrtyl Jaroslav Lisal and Jana Danesova Laboratory of Biomechanics and Biomaterial Engineering Faculty of Civ. Engineering Czech Technical University in Prague Czech Republic 1. Introduction The properties and behaviour of articular cartilage AC have been studied from numerous aspects. A number of biomechanical models of the properties and behaviour of AC are available today. The traditional model presents cartilage as homogeneous isotropic and biphase material Armstrong et al. 1984 . There also exist models of transversally isotropic biphase cartilage material Cohen et al. 1992 Cohen et al. 1993 non-linear poroelastic cartilage material Li et al. 1999 models of poroviscoelastic Wilson et al. 2005 and hyperelastic cartilage material Garcia Cortes 2006 models of triphase cartilage material Lai et al. 1991 Ateshian et al. 2004 and other models Wilson et al. 2004 Jurvelin et al. 1990 . The published models differ more or less by the angle of their authors view of the properties and behaviour of articular cartilage during its loading. The authors base their theories on various assumptions concerning the mutual links between the structural components of the cartilage matrix and their interactions on the molecular level. The system behaviour of AC very depend on nonlinear properties of synovial fluid SF . Certain volumes of SF are moveable components during the mechanical loading in the peripheral zone of AC. Biomechanical properties of peripheral zone of AC are significantly influenced by change of SF viscosity due to mechanical loading. The hydrodynamic lubrication systems and influences of residual strains on the initial presupplementation of articular plateaus by synovial fluid were not sufficiently analyzed up to now. Our research has been focused on analyses of residual strains arising in AC at cyclic loading and on .