Bristles for an interproximal and periodontal toothbrush

Claim 1

In a toothbrush having bristles attached to the end of a rigid frame for the purpose of inserting the bristles into the mouth to brush the teeth, wherein the improvement comprises: (a) groups of long, soft, bristles alternating with groups of shorter, soft, bristles from which shorter bristles are shaped four (4) sloping sides rising together to form the apex of a pyramidal shaped group, and (b) which group of pyramidal shaped, soft bristles, begin at the perimeter of the base of the pyramid, on the frame, with bristles rising, convexly, from the perimeter of the four sides to a common apex shorter in height than the bristles of the longer clump, with two of the four sides perpendicular to the long axis of the frame and the other two sides, opposite each other, parallel to the long axis of the frame, and (c) with the spacing of the alternating clumps of different sized bristles closely approximating the average width of the teeth with the longer bristles fitting into and between the spaces between the teeth, and the shorter pyramidal bristles fitting reversely into the gingival border around the base of the crowns of the teeth, and (d) allowing the bristles to both clean the crowns and the spaces between the teeth while at the same time massaging and exercising the gingiva bordering the teeth.