In human-cadaver cortical bone, we measured the maximum temperatures and
the durations of temperatures in excess of 55 degrees Celsius during
experimental insertion of five types of external skeletal-immobilization
pins. Drill speed, pin-point design, and predrilling were the variables
examined. Drill speed was found to have an effect on the maximum
temperature and the duration of temperatures in excess of 55 degrees
Celsius only in the immediate vicinity of the hole. Pinpoint design was a
more significant factor, and predrilling was highly effective as a method
of minimizing temperature elevation.