Abstract

In orthopedic surgery, if the temperature rises above 47 ° C during bone drilling, it can lead to thermal necrosis. The aim of this study is to analyze the mechanical and thermal parameters in the drilling process and to determine the conditions that lead to the creation of a minimum temperature during this operation by reverse heat transfer method. For this purpose, DEFORM-3D software used to analyze mechanical and thermal parameters in two modes of normal and high velocity. The Johnson-Cook model applied for cortical and trabecular bone material properties. The results show that the maximum differences for axial force and temperature are %10.4 and %4.8 respectively, compared to the experimental results. Also, the minimum achievable temperature for velocity drilling, typical for both trabecular and cortical bones, is 150 mm / min and a rotational speed of 2000 rpm, and for high-speed drilling, 150 mm / min, 4000 and 7000 rpm. It is for trabecular and cortical bones, respectively, in which thermal necrosis occurs and requires external cooling.