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Dental hygienic device

  • US 3,977,084 A
  • Filed: 08/26/1974
  • Issued: 08/31/1976
  • Est. Priority Date: 08/26/1974
  • Status: Expired due to Term
First Claim
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1. A dental hygienic device including a rotable bell-shaped prophylactic cup and means for rotating said cup about the axis thereof, said cup having a generally concave inner working surface designed to flair outwardly and adapt to contacted tooth surfaces, said inner working surface having a circumferentially outer lip for insertion into the gingival crevice, the outer surface of said cup including a shoulder for limiting the insertion of said lip into the gingival crevice, said inner working surface having abrasive means thereon, said abrasive means being arranged to have a varying abrasive effect dependent upon the radial distance from the outer circumference of said lip, the abrasive means having a lesser abrasive effect on that portion of the inner working surface immediately adjacent said outer lip than on other portions of the inner working surface.

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