Instrument for removing deposits and stains on teeth

Details Instrument for removing deposits and stains on teeth Instrument for removing deposits and stains on teeth

1991-04-01

1992-06-02

O'Connor, Cary E.

Dentistry

Apparatus

Hand manipulatable implement

433141, 433147, A61C 306, A61C 300

Patent

active

051182912

ABSTRACT:
An instrument for removing deposits and stains on teeth is provided with a handle having an end-piece which carries a working tool, the tip of which is intended to be applied on the teeth to be treated. The tool consists of an eraser formed by a body of molded synthetic resin such as polyvinyl chloride, polyamide or silicone, within which are incorporated abrasive or polishing elements of greater hardness such that their Rockwell hardness number is higher than 25 mPa but lower than 200 mPa. These abrasive or polishing elements consist either of glass fibers with a fiber content on the order of 20 to 30% or of micrograins of a synthetic resin such as methyl polymethacrylate or a polyamide resin with a concentration within the range of 5 to 90% by weight, with a preference for a range of 20 to 50%, the particle diameter of these micrograins being approximately 10 to 400 microns. The eraser thus formed makes it possible to erase deposits and stains on teeth siimply by rubbing the eraser on the surface of the teeth.

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patent: 4435160 (1984-03-01), Randklev
patent: 4780083 (1988-10-01), Croll
patent: 4946389 (1990-08-01), Weissenburger

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