How does a dentist’s drill work?
The drill works by using compressed air which is passed through fine tubes at a very high pressure, and that turns 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.
