Abstract: The invention relates to a brush provided with bristles made of an organic thermoplastic synthetic material such as nylon, particularly a tooth-brush.The free ends of the bristles which are sharp and therefore able to damage soft surfaces are made round by a heat treatment. The bristle ends are preferably submitted to a laser beam treatment, the source of laser beams being preferably placed below the bristle ends. Particularly, the brush and the heat source are submitted to a relative movement and the heat treatment takes place in an atmosphere of an inert gas.The invention relates also to a brush, preferably a tooth brush, having a head carrying a plurality of monofilaments made of an organic thermoplastic synthetic material.

Abstract: The present invention relates to a device for cleaning the proximal faces of teeth.The present device comprises a handle to which is fixed at least one elastically deformable cleaning element in the form of a thin bed. This cleaning element may consist of at least one layer, or at least one series of bristles, the plane of symmetry of which is preferably substantially perpendicular to the longitudinal axis of the handle.

Abstract: This invention relates to a toothbrush, the head of which preferably has a circular or elliptical cross section and carries at least one tuft of bristles, the width of which substantially corresponds to the depth of the sulcular sulcus.The head of the brush is preferably joined to a handle which has a polygonal cross section, preferably a square cross section, the median longitudinal plane of the tuft of bristles advantageously forming an angle of less than 90.degree., preferably an angle of 45.degree., with the plane of at least one surface of the handle having a polygonal cross section, which surface is turned towards the free end of the tuft of bristles.

Abstract: The invention relates to a brush provided with bristles made of an organic thermoplastic synthetic material such as nylon, particularly a tooth-brush.The free ends of the bristles which are sharp and therefore able to damage soft surfaces are made round by a heat treatment. The bristle ends are preferably submitted to a laser beam treatment, the source of laser beams being preferably placed below the bristle ends. Particularly, the brush and the heat source are submitted to a relative movement and the heat treatment takes place in an atmosphere of an inert gas.The invention relates also to a brush, preferably a tooth brush, having a head carrying a plurality of monofilaments made of an organic thermoplastic synthetic material.