Abstract: A dental/medical instrument holder with an internal imaging or video system wherein the body of the instrument is readily detachable from a connector portion. The instrument holder preferably contains a swivel feature which allows the body to swivel or rotate 360 degrees relative to the connector, and any hoses or cables attached to the connector, while the instrument is in use. The body of the instrument contains a collet or other feature which allows reversible attachment of various instrument tips. Illumination is provided to the instrument tip and adjacent work area, and images therefrom are transferred to an imaging system which includes a CCD camera within the instrument holder.

Abstract: A dental/medical instrument with an internal imaging or video system wherein the body of the instrument is readily detachable from a connector portion. The instrument preferably contains a swivel feature which allows the body to swivel or rotate 360 degrees relative to the connector, and any hoses or cables attached to the connector, while the instrument is in use. The body of the instrument contains a drill or other operative tool. Illumination is provided to the drill and work area adjacent the tool, and images therefrom are transferred to an imaging system which includes a CCD camera within the instrument.

Abstract: A high speed dental handpiece turbine spindle assembly in which a generally cylindrical spindle is rotatably mounted within a housing for actuation by a supply of pressurized air acting upon turbine blades associated with the spindle. The spindle includes a longitudinal bore which accommodates a drill bit or bur, with one end of the spindle being tapered and threaded to fit a matching chuck nut. The spindle and chuck nut have interfering geometry so that the chuck nut cannot be inadvertently removed while changing drill bits, and so that the chuck nut cannot be inadvertently tightened so far that the spindle is permanently deformed.