Abstract: An air driven dental handpiece comprising a hollow handle and a turbine housing mounted at one end thereof. The turbine housing includes a rotor having rotor blades with arcuate recesses formed therein. An air supply line is positioned within the handle and includes two spaced tubes adapted to inject air under pressure into the turbine housing and against the turbine blades. A fiber optic system is mounted within the handle, which is adapted to direct light from two separate sources adjacent the rotating bur mounted in the handpiece. A novel wrench is provided for securing a bur in the collet of the handpiece.

Abstract: Improved means for directing an atomized water spray at the tip of a bur in a dental handpiece irrespective of the length of the bur. The means comprises a water carrying tube terminating at a free end adjacent to the bur and directed at the bur at a first predetermined acute angle with respect to the longitudinal axis of the bur, a first air carrying tube disposed on one side of the water tube and having a free end terminating adjacent the free end of the water tube and a second predetermined acute angle to the longitudinal axis of the bur, the second angle being greater than the first angle, and a second air carrying tube disposed on the outer side of the water tube and having a free end terminating adjacent the free end of the water tube and at a third predetermined acute angle with respect to the longitudinal axis of the bur, the third angle being smaller than the first angle.

Abstract: An air driven dental handpiece comprising a handle and a turbine housing mounted at one end thereof. The turbine housing includes a rotor having rotor blades and ball bearings for rotatably mounting the rotor. A port is formed in the handle, which is in fluid communication with the interior of the turbine housing. A lubricant is injected into the turbine housing through the port. Removable sealing means cover the port to prevent any foreign matter from entering the turbine housing and to prevent air from leaving the port.