A hole perforation plate (60) has a front surface (61), a back surface (62), a thickness (D) therebetween, and a plurality of holes (70), grouped into more than one arrangement (65) of holes (70), wherein the more than one arrangement (65) of holes (70) can be identical or different compared to one another regarding the number of the holes (70), the shape of the holes (70), the size of the holes (70), the distance between the holes (70), the arrangement of the holes (70), and a combination thereof, and wherein the front surface (61) is uneven in the area of the arrangement (65) of the holes (70).

A head for an oral care implement comprises a number of colored filaments of different types. The filaments extend from a mounting surface of the head and are grouped together to define an initial color pattern. At least two types of filament have staggered time-controlled color changing properties, wherein each of said type of filament changes its color within pre-defined time periods, the pre-defined time periods being different from each other so that the initial color pattern changes color characteristics over at least a first pre-defined period of time to a first color pattern and over a subsequent second pre-defined period of time to a second color pattern, the second pattern being different from the first pattern.

A head for an oral care implement comprises a number of colored filaments of different types. The filaments extend from a mounting surface of the head and are grouped together to define an initial color pattern. At least two types of filament have staggered time-controlled color changing properties, wherein each of said type of filament changes its color within pre-defined time periods, the pre-defined time periods being different from each other so that the initial color pattern changes color characteristics over at least a first pre-defined period of time to a first color pattern and over a subsequent second pre-defined period of time to a second color pattern, the second pattern being different from the first pattern.

An oral care implement that includes a head having tooth cleaning elements including at least one conical tuft of bristles. The conical tuft of bristles defines a cavity that has a transverse cross-sectional area that increases with distance from the head. The tooth cleaning elements may also include one or more arcuate cleaning elements that at least partially surround the conical tuft. The tooth cleaning elements may also include multi-height bristle tufts along lateral sides of the head. Furthermore, the head may have two conical tufts such that one of the conical tufts is oriented at a smaller acute angle relative to the head than the other conical tuft and/or one of the conical tufts is taller than the other conical tuft.

An oral care implement that includes a head having tooth cleaning elements including at least one conical tuft of bristles. The conical tuft of bristles defines a cavity that has a transverse cross-sectional area that increases with distance from the head. The tooth cleaning elements may also include one or more arcuate cleaning elements that at least partially surround the conical tuft. The tooth cleaning elements may also include multi-height bristle tufts along lateral sides of the head. Furthermore, the head may have two conical tufts such that one of the conical tufts is oriented at a smaller acute angle relative to the head than the other conical tuft and/or one of the conical tufts is taller than the other conical tuft.

An oral care implement including an elastomeric component that includes a bumper portion that forms a distal-most section of the peripheral surface and a wall portion located along a distal-most section of the perimeter edge and protruding above the front surface. The wall portion may include a first ramped portion, an apex portion, and a second ramped portion. The wall portion may include a plurality of spaced-apart ridges protruding from an outer surface of the bumper portion and an outer surface of the wall portion. An oral care implement is disclosed that includes a soft tissue cleanser having a plurality of protuberances of differing heights.

An oral care implement including an elastomeric component that includes a bumper portion that forms a distal-most section of the peripheral surface and a wall portion located along a distal-most section of the perimeter edge and protruding above the front surface. The wall portion may include a first ramped portion, an apex portion, and a second ramped portion. The wall portion may include a plurality of spaced-apart ridges protruding from an outer surface of the bumper portion and an outer surface of the wall portion. An oral care implement is disclosed that includes a soft tissue cleanser having a plurality of protuberances of differing heights.

The invention provides for an oral treatment unit, or an assembly of a plurality of oral treatment units, for confining an electromagnetic field having a frequency in the range of 100 kHz to 300 MHz and adapted to be inserted into an oral cavity, which may form part of an oral cleaning device in combination with a base unit, including a first cleaning element coupled to the oral treatment unit. The oral treatment unit further includes a material structure coupled to the oral treatment unit adapted to receive an initial electromagnetic field and output a focused electromagnetic field, wherein the material structure has a passive electromagnetic field focusing function, which focuses the received initial electromagnetic field in the near-field region of the material structure. A further aspect of the invention provides for an oral treatment unit, or an assembly of a plurality of oral treatment units, for confining and modulating an electromagnetic field having a frequency in the range of 1 MHz to 300 GHz and adapted to be inserted into the mouth, which may form part of an oral cleaning device in combination with a base unit, including a first cleaning element coupled to the oral treatment unit. The oral treatment unit further comprises an electromagnetic field focusing element adapted to receive an electromagnetic field having an initial frequency and output a focused electromagnetic field. The electromagnetic field focusing element comprises a first material structure having a first passive electromagnetic field focusing function, which confines the modulated electromagnetic field at a given distance from the first material structure by performing one or more of: an attenuation rate control function in the near-field region of the first material structure; or a propagation direction modification function on the electromagnetic field. The electromagnetic field focusing element has a modulation function that modulates the confined electromagnetic field, thereby generating a modulated electromagnetic field.

The invention provides for an oral treatment unit, or an assembly of a plurality of oral treatment units, for confining an electromagnetic field having a frequency in the range of 100 kHz to 300 MHz and adapted to be inserted into an oral cavity, which may form part of an oral cleaning device in combination with a base unit, including a first cleaning element coupled to the oral treatment unit. The oral treatment unit further includes a material structure coupled to the oral treatment unit adapted to receive an initial electromagnetic field and output a focused electromagnetic field, wherein the material structure has a passive electromagnetic field focusing function, which focuses the received initial electromagnetic field in the near-field region of the material structure. A further aspect of the invention provides for an oral treatment unit, or an assembly of a plurality of oral treatment units, for confining and modulating an electromagnetic field having a frequency in the range of 1 MHz to 300 GHz and adapted to be inserted into the mouth, which may form part of an oral cleaning device in combination with a base unit, including a first cleaning element coupled to the oral treatment unit. The oral treatment unit further comprises an electromagnetic field focusing element adapted to receive an electromagnetic field having an initial frequency and output a focused electromagnetic field. The electromagnetic field focusing element comprises a first material structure having a first passive electromagnetic field focusing function, which confines the modulated electromagnetic field at a given distance from the first material structure by performing one or more of: an attenuation rate control function in the near-field region of the first material structure; or a propagation direction modification function on the electromagnetic field. The electromagnetic field focusing element has a modulation function that modulates the confined electromagnetic field, thereby generating a modulated electromagnetic field.

A method of making a brush includes providing a plurality of first filaments, each having a first end and a second end; bringing the plurality of first filaments into a first predetermined shape such that the first ends are arranged side by side on a common contour; fixedly connecting the first ends so that a first pre-tuft having the first predetermined shape and a connected first end is formed; bringing a second tuft element having a first end and a second end together with the first pre-tuft into a second predetermined shape such that the first end of the second tuft element and the connected first end of the first pre-tuft are arranged side by side on a common contour; fixedly connecting the connected first end of the first pre-tuft and the first end of the at least second tuft element so that a final tuft having the second predetermined shape and a connected end is formed; and attaching the final tuft to a brush body by overmolding the final tuft's connected end with a plastic material.