How does a dentists drill work?
Most dentists drill work using compressed air which is passed through fine tubes at very high pressures which turn miniature turbines connected to the drill itself. There are two types of drill a dentist will mainly use. A high speed drill which is very fast and used for cutting enamel and old fillings and a slow speed drill which is mainly used to remove decay. The high speed drill usually has water spraying out at the tip of it to prevent the drill getting very hot when cutting and damaging the tooth.
