Effects of dynamic loading on the mechanical behavior of total hip prosthesis

Abstract

Upon the arrival of the osteosynthesis, technological advancement has revolutionized the orthopedic surgery, producing increasingly efficient prostheses. Nevertheless, it turns out that over the years of lifetime these orthopedic implants presents complications in vivo. This requires in most cases a reoperation. To improve the total hip replacement lifetime it is imperative to investigate the effects of dynamic loading on the replaced joint. For this reason, we initially studied the mechanical behavior of their different components, according to the nature of hip's movements, the exerted forces on the femoral head and particularly the muscular forces acting on hip-femur system. Then, we performed numerical simulations of a femur carrying a cemented hip prosthesis type (CMK3), the boundary conditions used in the simulations are identical to those applied in vivo during the daily activities.

Keywords

• total hip prostheses
• surgical cement
• biomechanics
• muscle forces
• dynamic loading
• finite element analysis