The invention provides a mouthpiece for dental cleaning system and the dental cleaning system itself. The mouthpiece has a base and inner and outer arches. An actuator is for applying motion to the inner arch and/or the outer arch, relative to the base. A coupling arrangement converts motion of one of the inner and outer arches in one direction relative to the base to motion in an opposite direction relative to the base of the other of the inner and outer arches. By forming the mouthpiece as a central stationary base enveloped by two contour-following and moving arches, an anti-phase brushing motion at opposite tooth sites along the tooth arch is enabled, giving increased reach toward the molars as well as a reduction in device vibration in the mouth.

The present invention describes a method for a U-shaped teeth brush device having a conformable shape adjusting U-shaped teethbrush module and one or more individual tooth brushes coupled to the power drive mechanism, each brush having a sensor, piezoelectric crystal and transducer and each tooth brush having a block anchor coupled to the power drive, under smart controls, an electronic control system for sensing individual tooth pressure and controlling motor transmission of vibration to prior positioned brushes, whereby a users unique mouth features can be accounted for by adjusting U-shape distal ends to fit through the users mouth and align with users teeth arch for programmatically brushing more than one tooth simultaneously.

An electric oral cleaning tool, including: a housing, a transmission rod, and a brush head assembly. The brush head assembly is rotatably connected to an end of the housing, and a functional element is arranged on a side of the brush head assembly; a movable disk is arranged on another side of the brush head assembly, and the movable disk has a mating area offset from a center of the brush head assembly. The transmission rod is arranged in the housing and has an input end and an output end; the input end is configured to be connected to a transmission mechanism, and the output end is matched with the mating area; in condition of the output end moving with a variable diameter relative to a center of the movable disk, the output end drives the mating area and the brush head assembly to rotate.