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Electric toothbrush with means for locating dental plaque

  • US 5,894,620 A
  • Filed: 02/24/1998
  • Issued: 04/20/1999
  • Est. Priority Date: 06/28/1995
  • Status: Expired due to Fees
First Claim
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1. An electric toothbrush having cleaning bristles for personal care, comprising:

  • means for emitting excitation radiation towards teeth,means for detecting luminescence return radiation emitted in response to excitation radiation from affected tooth areas,optical fibre means for guiding the excitation radiation to the proximity of the teeth,electrical means for imposing on the toothbrush at least one brushing rhythm, characterized in that the optical fibre means pick up a narrow beam of return radiation and guide it to the detecting means which comprise filter means for extracting at least one useful signal component from a noise component, the useful signal component being in synchronism with said at least one brushing rhythm the detecting means converting the useful signal into a location signal revealing the affected areas.

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