The effect of an automatic toothbrush on periodontitis.
D000328:Adult; D003728:Dental Calculus / Q000517:prevention & control*; D005891:Gingivitis / Q000517:prevention & control*; D006801:Humans; D008875:Middle Aged; D010518:Periodontitis / Q000517:prevention & control*; D014099:Toothbrushing