Abstract: An apparatus for cleaning dental tools includes an instrument connection for blowing oil and/or cleaning agent, possibly in the form of a spray mist, through the instruments and subsequently drying the instruments with compressed air. A drive unit for driving movable instrument components may additionally be provided. The control of the various cleaning phases and of the conveyance of the cleaning liquids takes place pneumatically. In particular, a short-term flow of compressed air displaces at least one piston against a spring which causes oil and/or cleaning agent to be pressed into the instrument. A control edge of the piston produces a connection between the compressed air supply and the instrument connection when the piston leaves its upper position of rest.

Abstract: An endodontic filing tool which can be chucked into a dental tool holder with slight play but secured against rotating movement as well as against axial movement by chucking balls. A circumferential groove is provided at the rearward end of the tool shaft, wherein the circumferential groove is interrupted at at least one location, so that a stop for the chucking ball is formed.

Abstract: The invention is directed to a coupling for connecting dental angle pieces with handpieces. In so doing, an outlet point for the light guide 14 is provided in the angle piece near the tool holder in order to illuminate the work place in the mouth of the patient. The corresponding light source is provided either in the angle piece or in the handpiece, wherein the light is arranged on a slip ring on the coupling side when this light is on the angle piece side. The slip ring which carries the light source when the latter is contained in the angle piece is exchangeable for a ring which has a continuous light guide in place of the light, and a nose is likewise provided in this ring at the same location of the nose on the angle pieces which do not have a light.