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Abrasive Toothpaste Patented by P&G

November 15, 2005

Patent No. US 6,740,311 B2: Research-ers for P&G were awarded a patent for an abrasive dentifrice comprising an orally-acceptable carrier and a silica abrasive containing a precipitated silica with a particle size distribution ranging from 8-14 microns, a pellicle cleaning ratio of 70-140 and a radioactive dentin abrasion value of 100-250.
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