Abstract: The invention relates to a dental coupling unit (1), which can be detachably coupled to an instrument attachment (2) for dental treatment and/or examination at the front end (11) of the coupling unit and also can be connected to a supply unit (3) for providing supply media for the instrument attachment (2), wherein a media supply line (4) extends through the coupling unit (1) toward the instrument attachment (2) and wherein additionally a media return line (5) extends through the coupling unit (1), which media return line is connected to an end region of the media supply line (4) extending through the coupling unit (1), which end region faces the instrument attachment (2).

Abstract: The invention relates to a dental coupling unit (1), which can be detachably coupled to an instrument attachment (2) for dental treatment and/or examination at the front end (11) of the coupling unit and also can be connected to a supply unit (3) for providing supply media for the instrument attachment (2), wherein a media supply line (4) extends through the coupling unit (1) toward the instrument attachment (2) and wherein additionally a media return line (5) extends through the coupling unit (1), which media return line is connected to an end region of the media supply line (4) extending through the coupling unit (1), which end region faces the instrument attachment (2).

Abstract: Functional handpiece 1 having an elongate handpiece body which has at its rearward end a connection element for connection with a flexible supply line, and has at its forward end a light emission element of a light permeable material for the illumination of the treatment site, and has in the light emission element an outlet opening for a medium such as water or air or spray, the light emission element forming a forward region of the functional handpiece and being releasably connected with the remaining region of the functional handpiece, and the light emission element having a plug-in fitting for the light emission element.

Abstract: A device for regulated heating of media in a dental handpiece has at least one media line which can be opened via a switch, a heating element associated with the media line, a temperature sensor detecting the temperature of the medium and a regulation circuit which is connected with the temperature sensor and controls the heating element in dependence upon the sensor signals. After actuation of the switch the heating element is operated for a short period of time at a predetermined heating power independent of the output signal of the regulation circuit, in order to heat the medium as rapidly as possible to the required temperature.