detachable and replaceable bristle head whose bristles form a contoured brushing surface having three to four alternating rounded peaks and valleys and which has a raised helical screw thread on its neck that allows a twirling motion at the neck to impart a diagonal direction of travel to the bristles of the brush application_number US 4644593 A description turning first to fig1 there is shown in perspective view one preferred embodiment of the toothbrush of the present invention with a typical handle i and the brush body means 2 in which there are anchored a large number of tufts 3 of bristles 4 the handle and brush body means can be made of any resilient material but most preferably and conveniently will be made of a thermoplastic material that has been injection molded in one piece or in two pieces that are to be joined fixably or rotatably at neck area 8 the bristles 4 are inserted and molded into the brush body means 2 by methods well known to those of ordinary skill in the brush making art bristles may be of natural origin or made of any suitable thermoplastic material preferably nylon bristles may be inserted and retained in previously molded holes by well known means and the shaping of the ends of the bristles into their preferred curvitures made before or after the bristles are bonded into said brush body means according to means well known to those of ordinary skill in the art alternatively tufts may be installed by center folding of a single long length bristle into.