Abstract: A disinfection device with a pressure vessel which has an interior space for receiving a medium, and with at least one radiating device which is arranged such that it emits radiation into the interior space of the pressure vessel, wherein one or several surfaces of the interior space of the pressure vessel are formed at least partially as a reflection surface for the radiation. A particularly reliable sterilization of medical or dental compressed air in the pressure vessel is made possible. One or several disinfection devices according to the invention can be provided in a compressor system for providing compressed air for dental applications, in a dental treatment device with a compressed air device and/or in a connection device with one or several tube sections for guiding compressed air for dental applications.

Abstract: The invention is directed to an electric toothbrush provided with a protective cover which is adapted to be pushed onto the handle section of the toothbrush. The protective cover protects in particular the drive shaft of the toothbrush extending from the handle section from contaminants, liquids as well as the impact of forces. The protective cover is further provided with a safety interlock preventing an accidental operation of the electric toothbrush when the protective cover is seated in place. A notch already provided is used for accomplishing a firm locking engagement of the protective cover with the handle section. The embodiments described cover both an integral and a two-part structure of the protective cover.