Prediction model of bone drilling temperature based on heat source method in surgical rehabilitation

摘要

In order to feedback the cutting temperature in real time during the operation with the surgical robot, this study established a temperature prediction model to analyze the temperature distribution of the cortex. In this work, a three-dimensional governing equation for heat transfer of bone tissue during drilling is proposed, and the heat transfer of cortical bone is evaluated by a reverse heat transfer method. The prediction model was validated by experimental methods and the heat affected zone (HAZ) of cortical bone was analyzed. The results show that the prediction results are in good agreement with the relevant experimental results. HAZ increases with increasing rate of penetration; the closer the bone hole is, the earlier the temperature rises; and the temperature at which the cortical bone is difficult to measure (radial distance x < 0.5 mm) is predicted. The predictive model can accurately predict the temperature distribution of the cortical bone and prevent the occurrence of thermal damage. Provide technical support for the development of medical rehabilitation robots. And reduce the patient’s secondary injury, which is conducive to rapid recovery after surgery.