Abstract: A device for “treating” gingiva/mucosa at teeth/implants comprises at least one segment comprising a contour surface formed according to an individual geometry of a patient's dentition for closely contacting a region of an outer surface of a tooth and an adjacent region of a gingiva, whereas the regions in particular include a sulcus region, a storage and/or supply for a composition including a cleaning agent, a remineralizing composition, and/or a pharmaceutical composition to be applied to the regions of the tooth and the gingiva and a transmission element for transmitting vibrations to the at least one segment.