US Patent 7055205 Toothbrush and head thereof

The toothbrush can prevent harmful effects that the conventional toothbrushes frequently give and is composed of disintegratable or replaceable parts, so that a user can select an optimum toothbrush by combining suitable parts depending on the individual user's specificity. The toothbrush contains a head having bristles implanted therein, a neck having the head attached to the distal end thereof and a holder for holding the neck. The head is a single piece or is composed of a plurality of head segments. The holder is provided at the distal end thereof with an adjuster for adjusting the length of the neck protruding from the holder.