Patent ID: 7854036

Claim:
A toothbrush head, connected to or connectable to a handle, and which is elongated along a head longitudinal direction and has a bristle face from which bristles extend in a bristle direction, the bristle face having an undulating surface that varies, with longitudinal distance along the head, in its displacement distance in a direction perpendicular to a plane passing through the head parallel to its longitudinal direction, so that there is at least one part more displaced from said plane and at least one part less displaced from said plane, and comprising an arrangement of said at least one part more displaced and at least one part less displaced which comprises: a first less displaced part adjacent the end of the head furthest from the handle, a first more displaced part longitudinally adjacent to this first less displaced part and closer to the handle, a second less displaced part longitudinally adjacent the first more displaced part and closer to the handle, a second more displaced part longitudinally adjacent to this second less displaced part and closer to the handle so that the second less displaced part is longitudinally between the first and second more displaced parts, and a third less displaced part longitudinally adjacent the second more displaced part and closest to the handle; and, wherein bristles having a triangular cross section extend only from the more displaced parts of the head.