Deep cleaning

By Barry Fox Toothbrushes don’t always remove plaque from inaccessible areas at the back of the teeth. So Paul Welfle of Mobberley, Cheshire, wants to enlist the help of the tongue, which is already designed to reach parts that brushes can’t (GB 2 327 339). A light brush with strong pointed filaments is secured to the top of a concave cup shaped to fit the tip of the tongue. Suction holds the brush on the tongue so that users can clean the back of their teeth,
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