An electric motorized toothbrush with a pair of bristle units spaced apart from each other by a gap and a third bristle unit bordering the gap by being closer to each of the bristle units of the pair than the bristle units of the pair are to each other. A motorized gear transmission, via associated spindles, rotates the pair of bristle units in opposite directions and either rotates or reciprocates the third bristle unit. The bristle units of the pair include a respective cylinder and bristles that extend radially outward from the respective cylinder and the bristles may be of varying lengths. The bristles rotate in a direction away from the gum line while the teeth are inserted into the gap.
