[BIOMECHANICAL EVALUATION OF PRIMARY REPLACEMENT ARTHOPLASTY FOR UNSTABLE INTERTROCHANTERIC FRACTURES].

Aim - to study peculiarities of changes of stress-strain state in the proximal femur around the implanted femoral component of hip prosthesis in case of inter-trochanteric fracture on the background of involutive osteoporosis in connection with functional loading by numeral analysis on a mathematical model. Using program SolidWorks 2 variants of finite element models of inter-trochanteric fractures were built, including type 31-A2, with the implantation of the femoral component of hip prosthesis - without restoration and with the restoration of the intertrochanteric region and calcar with a ring-shaped graft. The simulated load is single-support standing and the action of the musculo-ligamentous apparatus in the vertical position of the body.