BONE DRILLING TEMPERATURE

In case of fracture or crack of human bones, the most important is to return the bone parts as precisely as possible into their previous positions. The operative or surgery method in that case is the best. During the surgery traumatologist drill the bone in order to set the immobilization screws and plates and the goal is to insure maximum avoidance of motion of the fracture bone parts i. e. to achieve optimal immobilisation. During bone drilling, the surrounding tissue is heated and if the maximal temperature of the bone tissue around the bore increases above some critical limit, this may result in thermal necrosis (death of the bond cells around the drilled bore). The consequence of thermal necrosis is that immobilisation screw joint loose over time. This paper presents the results of research realised in measuring the maximal bone drilling temperature depending on some technological parameters and type of the drill.