Abstract

RAMOS-BOTELLO, Yoan Manuel; ARIAS-HIDALGO, René Misael; BOSCH-CABRERA, Jorge Alexander  and  ESTRADA-CINGUALBRES, Roberto Andrés. Comparative numerical analysis of the fatigue behavior of two osteosynthesis used in the treatment of hip fracture 31 A1 .1. Ing. invest. y tecnol. [online]. 2017, vol.18, n.4, pp.445-455. ISSN 2594-0732.

In the present research the fatigue behavior is simulated with a thin-element calculus software, internal fixing plate DHS (Dynamic Hip Screw) and a Gamma nail, used in the treatment of hip fracture. For the analysis of the behavior static studies have been carried out, where the fundamental variables have been evaluated in the stresses of von Mises. For this, the action of muscles and body weight for four instants of the gait cycle has been taken into account, as well as the restrictions, the contact conditions between the models and the mechanical properties of each one of them. Based on the results of the static studies and the S-N curves of the material of each model, fatigue studies were performed to determine the cycle life of each fixative. The studies allowed to determine where the tensions are greater and which of them can withstand greater cycles of load before the fall by fatigue. Based on the results of the results, it was possible to determine that the Gama nail is the best mechanical behavior, for all the cases studied, which could be verified with the results obtained by other authors. However, since the studies do not consider the trabecular area of the femur, the results obtained are valid only from the qualitative point of view.

Keywords : finite elements; biomechanics; hip fracture; plate DHS; Gamma nail.