Mouthpiece for brushing at a plurality of dental positions, brushing device comprising such mouthpiece, and method of operating such a mouthpiece or brushing device.
The invention relates to a mouthpiece for simultaneously brushing at a plurality of dental positions. The mouthpiece comprises a body with at least one recess. Said recess has a 5 curved length direction and a U-shaped cross-section transverse to the length direction and is configured for encompassing, viewed in the curved length direction, at least 5 dental positions. The body comprises a flexible recess wall delimiting the recess. The recess wall may be lined with a plurality of bristles extending from the recess wall into the recess. The body has at least one pressure chamber configured for containing a fluid under pressure. The body is configured to deform the recess wall by reciprocatingly increasing and decreasing a pressure in the pressure chamber between a decreased and increased pressure condition. The recess wall is configured to have such a local deformability that, when reciprocatingly increasing and decreasing the pressure in the at least one pressure chamber, the shape of the recess wall locally changes. In the increased pressure condition, the shape of the recess wall is locally adjusted to the local shape of the dental positions encompassed by the recess wall whilst, in the decreased pressure condition, the shape of the recess wall is locally less adjusted to the local shape of the dental positions encompassed by the recess wall than in the increased pressure condition.
