Abstract: A toothbrush in the form of a manual toothbrush having a rectangular bristle array (1) or in the form of an electric toothbrush having a round bristle array (1), formed from individual bristle bundles (2), arranged adjacent to each other on a brush head and standing erect at approximately right angles thereto is provided. At least some of the individual bristle bundles (4) are at least partly inclined or roof-shaped with respect to a plane approximately parallel to the brush head (2), such that bristles in the bristle bundles (4) stand to differing heights whereby the terminal surfaces arranged at the applied ends of the bristle bundles (4) are embodied as inclined surfaces (5) or as partly inclined surfaces. The bristle bundles (4) are arranged in a line adjacent to each other along imaginary straight or curved connecting lines, or for round brushes, along segmental or circular connection lines.

Abstract: In order to manufacture brushes, in particular toothbrushes, bundles (3) of bristles, enclosed at first by a covering (2) or the like, are first cut open in a bristle magazine (4), so that the covering (2) can be removed. The covering is cut through at two points that are spaced apart from one another, in particular situated opposite one another, and the resulting two parts (2a and 2b) of the covering (2) are removed from the bristle magazine towards two opposite sides thereof.

Abstract: A teeth-cleaning device (1) has a handle (2) which on one end, preferably on two opposite ends, has an interdental treatment element, for example in the form of a fine brush (3) or hard brush (4) and possibly even in the shape of a tooth pick. The treatment element is positioned perpendicular to, and projects from the longitudinal axis of the handle (2), and is removably and replaceably attached by means of a locking element (5) which can be detachably fixed in a locking position. To this end, the treatment element or a holding device forming part thereof, such as a retaining wire (4a), is inserted in the operating position into a hole (6) extending perpendicular to the longitudinal axis of the handle (2). When the locking element (5) clears this hole (6), the treatment element can be removed and a different one inserted. In the locking position, in contrast, the locking element (5) covers the hole (6) and thus prevents the removal of the treatment element inserted into the hole.