Novel device

A toothbrush head having a bristle surface from which tufts comprising plural bristles extend in a bristle direction, each tuft comprising shorter bristles having a cross section which does not taper from their lower end toward their upper end and longer bristles which taper from their lower end toward their upper end, the taper of the longer bristles commencing above the upper ends of the shorter bristles, and wherein each said tuft is set in a tuft socket having a minimum dimension across the longitudinal direction of the bristle filaments in the range 1.7-2.4 mm.

A toothbrush head having a bristle surface from which tufts comprising plural bristles extend in a bristle direction, each tuft comprising shorter bristles having a cross section which does not taper from their lower end toward their upper end and longer bristles which taper from their lower end toward their upper end, the taper of the longer bristles commencing above the upper ends of the shorter bristles, each tuft containing 2-12 longer filaments extending from the bristle surface.

A toothbrush head having a bristle surface from which tufts comprising plural bristles extend in a bristle direction, each tuft comprising shorter bristles having a cross section which does not taper from their lower end toward their upper end and longer bristles which taper from their lower end toward their upper end, the taper of the longer bristles commencing above the upper ends of the shorter bristles, characterized in that the length of the longer bristles above the upper ends of the shorter bristles is from 4 mm up to 7 mm, and each tuft contains 2-12 longer filaments extending from the bristle surface.

A toothbrush head having a bristle surface from which tufts comprising plural bristles extend in a bristle direction, each tuft comprising shorter bristles having a cross section which does not taper from their lower end toward their upper end and longer bristles which taper from their lower end toward their upper end, the taper of the longer bristles commencing above the upper ends of the shorter bristles, and wherein the length of the longer bristles above the upper ends of the shorter bristles is from 4 mm up to 7 mm, wherein each said tuft is set in a tuft socket having a minimum dimension in the range 1.7-2.4 mm, and wherein each tuft contains 20-30 shorter bristle filaments and 2-12 longer filaments extending from the bristle surface.

A toothbrush head having a bristle surface from which tufts comprising plural bristles extend in a bristle direction, the tufts being disposed in a pattern on the bristle surface comprising a relatively inner cluster of plural tufts each of which contains relatively longer bristles which taper from their lower end toward their upper end, and plural relatively outer tufts of relatively shorter bristles.