Medical or dental treatment device and tool for such a treatment device

A medical or dental treatment device, which can be connected to a plurality of different tools, wherein the medical or dental treatment device comprises:

• a tool retainer for connecting the treatment device to a tool,
• at least one measuring coil which is connected to an electrical energy supply device via an electrical line and which can be supplied with a periodic electrical energy supply from the electrical energy supply device, and
• an evaluation device electrically connected to the at least one measuring coil for detecting whether a tool is connected to the treatment device or which of a plurality of tools is connected to the treatment device,
• wherein due to an inductive coupling between the tool accommodated in the tool retainer and the at least one measuring coil supplied with the periodic electrical energy, a periodic measurement signal specific to the tool is generated and assigned by the evaluation device to the tool, and
• wherein the evaluation device determines the phase shift of the electrical voltage and of the electric current of the periodic measurement signal.