Abstract: A dental hygiene apparatus including a mouthpiece formed of a flexible arcuate channel defining and inner space designed for receiving an upper or lower set of human teeth. The channel is provided with longitudinally extending tunnels interconnected by communicating passageways. Each of the tunnels is provided with a longitudinally extending track and a guide slot communicating with the inner space. A carriage assembly includes motor assemblies joined by rigid chassis rods. The carriage assembly is designed such that the motor assemblies may be disposed in the tunnels while the chassis rods are disposed in the passageways. The motor assemblies have a shaft extending through one of the guide slots and carrying a rotatably mounted cleaning head on a distal end. The motor assemblies also include a driven wheel resting on a one of the tracks, for propelling the carriage assembly along the tracks. The cleaning heads rotate to clean the teeth and travel along the tracks to clean each tooth in sequence.