Toothbrush

A toothbrush comprising:

• a longitudinal handle with an axis,
• a brush head with a plurality of bristles, and
• a coupling mechanism that fastens the brush head to the handle such that the bristles are generally perpendicular to the axis of the handle and the brush head can rotate and tilt with respect to the handle about an axis generally perpendicular to the handle axis,
• wherein the brush head is formed by a flexible material and includes first and second bristle support portions, each with bristle bundles that extend from inclined surfaces thereof, and a central bristle support portion with a central bristle bundle that extends from a base surface thereof, disposed between the first and second bristle support portions,
• wherein the first and second bristle support portions movably connects to the central bristle support portion at first and second hinges, such that when the toothbrush moves along a dental arch of a user, the first bristle support portion moves along the first hinge to engage a buccal side of the teeth and adjacent gums, the second bristle support portion moves along the second hinge to engage a lingual side of the teeth and adjacent gums, and the central bristle support portion moves along and engage a biting surface of the teeth;
• and
• wherein the coupling mechanism includes a spring biasing the two brush head portions away from each other and cam surfaces for urging the two brush head portions to pivot so as to urge at least one of the two brush head portions to pivot toward the other brush head portion against the bias of the spring so as to cause the gap between the brush head portions to vary with the angle that the handle makes with the brush head.