Abstract: Fluid-operated dynamoelectric converters for medical or dental devices are described. The dynamoelectric converters have: a fluid line which is designed in one piece with an outer sleeve of the dynamoelectric converter and protrudes at its end which faces away from the dynamoelectric converter beyond a connecting end of the medical or dental device; a fluid-operated impeller which is designed in one piece with a rotor sleeve receiving the magnetic element; a one-piece, sleeve-shaped magnetic return element which surrounds the rotor and the electric winding of the stator and has a magnetically conductive material.

Abstract: Fluid-operated dynamoelectric converters for medical or dental devices are described. The dynamoelectric converters have: a fluid line which is designed in one piece with an outer sleeve of the dynamoelectric converter and protrudes at its end which faces away from the dynamoelectric converter beyond a connecting end of the medical or dental device; a fluid-operated impeller which is designed in one piece with a rotor sleeve receiving the magnetic element; a one-piece, sleeve-shaped magnetic return element which surrounds the rotor and the electric winding of the stator and has a magnetically conductive material.

Abstract: A medical or dental treatment device for use in an oral or dental procedure, comprises a base part with a power supply unit and an electrical or electronic control device and a set of different parts for use with the base part. The set of different parts comprises at least one delivery part for a first treatment phase and comprising a sound or ultrasound source, a movable piston and a piston operating element operable to deliver a substance from the delivery part to a treatment site, and at least one active part for use in a second treatment phase to act on the treatment site. The active part comprises a sound source, an ultrasound source and/or an electromagnetic radiation source. The delivery part and the active part are selectively connectible to the base part for use in consecutive treatment phases (the first can precede or follow the second).

Abstract: A medical or dental treatment device for dispensing a medium having a base part with a power supply unit and an electrical or electronic control device and at least one delivery part that can be connected detachably to the base part via a coupling device and which has a sound source, such as an ultrasound source, and a delivery device for dispensing the medium from the delivery part. In addition, at least one active part, which can be connected detachably to the base part via the coupling device, may also be provided.