The brush, in development for two years, will come in 18 varieties, each with a different two-minute song clip — the amount of time dentists recommend for a good brushing — from a popular artist.
When the user pushes a button on the manual toothbrush, it “plays” a song. As the bristles are brushed across the teeth, they send sound waves through them so that the user hears the song in his or her head.
