Abstract: A dental handpiece having a mechanism for mounting a bur in one end thereof. A fiber optic system is mounted within the handpiece, and is adapted to direct light adjacent the bur when it is rotating to aid a dentist in using the handpiece. The fiber optic system includes a bulb mounted within the handpiece, which bulb is secured in a housing formed from a heat-resistant plastic. Air used for driving the handpiece is also used to cool the heat generated by the light. A pneumatic switch is provided for automatically turning on the light when the handpiece is used and for automatically turning off the light when use of the handpiece is terminated.

Abstract: An air driven dental handpiece having an air turbine at one end thereof. Collet means for securing a dental bur therein are positioned within the air turbine. The collet means includes a plurality of collapsible jaws at the bottom thereof. Threads are provided on the exterior surface of the collet means in the area of the jaws. The bottom of the collet means is tapered, and a collet nut is threadedly secured on the collet means. The collet nut has an internal taper which is complementary to the taper of the collet means. The threaded advancement of the collet nut on the collet means causes the collapsing of the jaws of the collet means, through the mating tapers, and accordingly a dental bur can be secured in the collet means.