ANALYSIS OF TEMPORAL PARAMETER FOR STANFORD ISOTROPIC BONE REMODELING MODEL FOR IMPROVEMENT OF DATA PROCESSING

Bárbara Belisa Soffiatti¹; Jucélio Tomas Pereira¹; José Eduardo Gubaua¹; Gabriela Wessling Oening Dicati¹

¹ Federal University of Paraná

doi:10.20906/CPS/CILAMCE2017-1075

Resumo

Bone is the structure that sustains the human body, which is subject to different types of loadings. Due to it is a life tissue, bone contains cells responsible for the formation and removal of the bone tissue. They act in a process called Bone Remodeling. Therefore, according to the individual's physical activities, it generates stress and deformation fields, which allow the process of remodeling and the change of bone structure. The improvement of technology allows the application of multidisciplinary studies, so that engineering can aid in the solutions of medical problems using, for example, computational tools. The aim of this paper is to analyze the behavior of bone remodeling for a human femur in different time intervals, knowing that the local density update depends on the time in which remodeling will be renewed. A heterogeneous configuration of densities, similar to a tomography of a real femur, is formed by application of loadings, which simulates a person's dairy walk, in a previous homogenous configuration of densities. This is made through analysis by finite element methods (FEM), wherein it is used the software Abaqus customized with the subroutine developed in Fortran language, with the isotropic model of Stanford bone remodeling. The evaluations of different parameters as well as the temporal variation of bone mass are performed on MATLAB software. As preliminary results, it is possible to note that there are not great variations in the distribution of densities, although the models present checkerboard in their configuration, making it necessary to implement the smoothing treatment of densities. The mass variation in function of days of loading shows similar convergence curves for distinct time intervals however has considerable differences as their time stabilization and their values of mass variation. It is important to reduce the simulation time of bone remodeling in order to realize a greater quantity of trials based on, for example, individual characteristics of people.

Palavras-chave: Finite Element Method; Biomechanics; Bone Remodeling; Abaqus; Parameters Change