Development of the ultrasonic toothbrush.
D003742:Dental Devices, Home Care; D003773:Dental Plaque / Q000628:therapy; D003777:Dental Prophylaxis; D005260:Female; D006801:Humans; D008875:Middle Aged; D009909:Oral Health; D014099:Toothbrushing; D014465:Ultrasonics / Q000295:instrumentation*