Brushhead for use in an acoustic toothbrush

A brushhead for use with a vibrating toothbrush which uses fluid to produce an acoustic cleaning effect on teeth, the brushhead comprising:

• a brushhead base member;
• and
• a plurality of bristle portions arranged in columns and rows to define a bristle portion group, wherein some of the bristle portions are shorter than the remaining longer bristle portions, wherein the longer bristle portions are located at distal and proximal ends of the bristle portion group and one intermediate position between said two ends, wherein the brushhead includes two adjacent rows of shorter bristle portions between the distal end bristle portions and the intermediate position bristle portion, and one row of shorter bristle portions between the proximal end bristle portions and the intermediate position bristle portion, wherein the space between the distal end bristle portions and the intermediate position bristle portion accommodates posterior teeth, while the space between the intermediate position bristle portion and the proximal end bristle portions accommodates anterior teeth, so as to provide better coverage for the teeth during brushing.

A brushhead for use with a vibrating toothbrush which uses fluid to produce an acoustic cleaning effect on teeth, the brushhead comprising:

• a brushhead base member;
• and
• a plurality of bristle portions mounted in the brushhead base member, defining a bristle portion group, the bristle portions including a first set of shorter bristle portions, a second set of longer bristle portions, and a third set of longest bristle portions which are slightly longer than the second set of longer bristle portions, wherein the longer bristle portions are located at opposing longitudinal ends of the bristle portion group and wherein the longest bristle portions are located intermediate of the opposing longitudinal ends of the bristle portion group, wherein the shorter bristle portions are located between the longer bristle portions and the longest bristle portions, and wherein the longest bristle portions provide increased interdental penetration of the teeth during use, resulting in improvement of plaque removal.

A brushhead for use with a vibrating toothbrush which uses fluid to produce an acoustic cleaning effect on the teeth, the brushhead comprising:

• a brushhead base member;
• and
• a plurality of bristle portions mounted in the brushhead base member and arranged to define a bristle portion group, wherein at least some of the bristle portions are shorter than the remaining longer bristle portions, wherein the longer bristle portions are located at opposing ends of the bristle portion group, and wherein the longer bristle portions at both ends of the bristle portion group have an angle tip within the range of 56° to 72° degrees for improved interdental penetration by the bristles, wherein the bristle portion group has eight rows and four columns and wherein two adjacent distal end rows and two adjacent proximal end rows have said longer bristles.