Modular interproximal toothbrush system

Claim 1

A toothbrush construction having the capability for simultaneously penetrating the innerproximal spaces and the free gingival margins of the teeth of both the maxillary and the mandibular arches comprising: (a) at least one elongated bristle bearing head having a major axis extending between opposite ends of said head, said bristle-bearing head comprising a back having a substantially flat surface, a plurality of bristles projecting from said flat surface in a predetermined arrangement bilaterally symmetrical with respect to a minor axis of the head, the predetermined bristle arrangement including a wedge-like configuration having an apex located adjacent each of the opposite ends, the bristles around the perimeter of said bristle-bearing head at the apices having a thickness which is less than the average thickness of the remainder of the bristles in order to reduce the firmness and abrasive qualities of these bristles; (b) a means for detachably attaching the head to a stem, the stem having a longitudinal axis and first and second straight end portions spaced apart and in parallel and connected by an angularly disposed straight middle portion, the attachment being disposed at the distal end of said first straight end portion so that when the head is attached to the stem, the stem's longitudinal axis is coaxial with respect to the minor axis of the head, the first straight end portion of said stem being provided with a series of ridges to facilitate gripping of the stem near said head; (c) a mid portion of the head located between the apices, the length of the mid portion along the major axis being such as to position each apex at the gingival margin at each of the edges when the mouth is at an open position and the stem disposes the longitudinal apices in the occlusal plane, wherein the head can be readily removed from the stem and replaced with other heads having either the same configuration or a different configuration.