Dental treatment and/or examination assembly, dental coupling unit, and method for flushing the liquid-conducting system of a dental treatment and/or examination assembly

A dental treatment and/or examination assembly having

• a dental coupling unit which can be releasably coupled at its front end to an instrument attachment for dental treatment and/or examination,
• a supply unit for providing supply media for the instrument attachment, wherein the supply media comprise at least one liquid, and
• a media delivery line for the liquid which extends from the supply unit through the coupling unit toward the instrument attachment,
• a media return line which can be connected to an end region of the media delivery line extending through the coupling unit, said end region facing the instrument attachment,
• wherein the dental treatment and/or examination assembly moreover has means for selectively enabling a flow of the liquid through the media delivery line and the media return line,
• a flushing adapter, which can be coupled to the coupling unit when the instrument attachment is not fitted to the latter,
• wherein the media return line extends starting from the flushing adapter and, in the coupled state between flushing adapter and coupling unit, is connected to the media delivery line extending through the coupling unit,
• wherein
• the flushing adapter has seats for adapter inserts which are each designed for coupling to a coupling unit, wherein the adapter inserts can be freely positioned in the seats.

A method for flushing the liquid-conducting system of a dental treatment and/or examination assembly, wherein the treatment and/or examination assembly has:

• a dental coupling unit which can be releasably coupled at its front end to an instrument attachment for dental treatment and/or examination,
• a supply unit for providing supply media for the instrument attachment, wherein the supply media comprise at least one liquid, and
• a media delivery line for the liquid, which extends from the supply unit through the coupling unit toward the instrument attachment,
• said method having the steps of:
• a) conducting the liquid from the coupling unit to the instrument attachment when the instrument attachment is fitted to the coupling unit,
• b) flushing the liquid through the media delivery line and through a media return line connected to the latter when the instrument attachment is not fitted to the coupling unit.