Simulación del mecanismo de filtración del ácido hialurónico en una prótesis total de

JOSÉ DI PAOLO; MARCELO E. BERLI; DIEGO M. CAMPANA; SEBASTIÁN UBAL; LUCIANO D. CÁRDENES

San Juan (capital), Argentina

Congreso; XVI Congreso Argentino de Bioingeniería SABI 2007 / V Jornadas de Ingeniería Clínica (SABI 2007); 2007

Polyethylene (UHMWPE) wear of current knee prosthesis, causes prosthesis loosening after no more than 15 years. In this work, a steady state one-dimentional lubrication model with non-Newtonian fluid, porous elastic layer on tibial component, ultra-filtration mechanism of fluid and some features of the surface roughness is studied through a numerical technique based on the Finite Element Method. The results show that the UHMWPE stiffness makes difficult the lubrication mechanism of the artificial joint promoting abrasive and fatigue wear. Nevertheless, the use of compliant porous materials on the tibial component could reduce the friction and wear. Also, the ultrafiltration mechanism promotes the efficiency on the joint.