| 摘要 |
The specification discloses a fluoride toothpaste using a calcined kaolin abrasive which is at least 80% calcined and which has a particle-size distribution such that the majority of particles are between 1 and 10 microns in diameter, and not more than 35% of the particles are under one micron in diameter. The resulting toothpaste shows surprising efficacy in terms of fluoride availability, fluoride uptake on human enamel, enamel solubility reduction and polishing and stain removal.
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