Abstract: This dental intra-oral film packet configuration includes a film chip and a non-lead radiation shielding member insertable in the light-tight envelope or integral to a wall of the light-tight envelope. The film chip has two sides sensitive to radiation exposure, and the packet protecting the film chip incorporates the radiation shielding fiber powder element on one side of the film chip to provide backscatter radiation equal to the lead (Pb) foil embodiment when the film packet is exposed to radiation. The radiation shielding embodiment is a compounded material of thermoplastic and non-lead metal which couples as the light-shielding member of the envelope or as an insertable shield.

Abstract: This dental intra-oral film packet configuration includes a film chip and a non-lead radiation shielding member insertable in the light-tight envelope or integral to a wall of the light-tight envelope. The film chip has two sides sensitive to radiation exposure, and the packet protecting the film chip incorporates the radiation shielding fiber powder element on one side of the film chip to provide backscatter radiation equal to the lead (Pb) foil embodiment when the film packet is exposed to radiation. The radiation shielding embodiment is a compounded material of thermoplastic and non-lead metal which couples as the light-shielding member of the envelope or as an insertable shield.

Abstract: There is disclosed a process and apparatus for withdrawing an exhaust stream including gas, liquids and solids from the dental operatory connected to the suction side of a vacuum pump wherein solids and liquids are sequentially removed such that compressed gas from the vacuum pump is passed through a heat exchanger for cooling, thus permitting the use of lightweight, less expensive conduit piping for a vent exhaust conduit.

Abstract: A foot switch, interface and associated software, the foot switch having a plurality of switch positions and which permits the operator to duplicate the equivalent series of keyboard entries for the operation of computer functions by means of foot manipulation utilizing the foot switch.

Abstract: There is disclosed a process and apparatus for withdrawing an exhaust stream including gas, liquids and solids from the dental operatory connected to the suction side of a vacuum pump wherein solids and liquids are sequentially removed such that compressed gas from the vacuum pump is passed through a heat exchanger for cooling, thus permitting the use of lightweight, less expensive conduit piping for a vent exhaust conduit.

Abstract: A photo-curing light system in which a modulation of the light intensity or output is controlled via an analogue control voltage to the control line output of the lamp power supply. The control signal results in the lamp current being reduced from its maximum value to a lower value on a continuous and repeated basis thereby modulating the light and reducing the heating value to surrounding material such as tooth structure during the curing process.

Abstract: Applicant's invention relates to a photo-curing light assembly having calibration circuitry determinative of the intensity level of the light source and the generation of an analogue control voltage from a digital control voltage during use which automatically adjusts light intensity to achieve proper energy levels during programmed curing times.

Abstract: A foot switch, interface and associated software, the foot switch having a plurality of switch positions and which permits the operator to duplicate the equivalent series of keyboard entries for the operation of computer functions by means of foot manipulation utilizing the foot switch.

Abstract: A photo-curing light system in which a modulation of the light intensity or output is controlled via an analogue control voltage to the control line output of the lamp power supply. The control signal results in the lamp current being reduced from its maximum value to a lower value on a continuous and repeated basis thereby modulating the light and reducing the heating value to surrounding material such as tooth structure during the curing process.