toothpaste

The mineral is added to some water supplies and brands of toothpaste to help prevent tooth decay.

Dunthorne’s title derives from one of Siegfried’s early professional accomplishments: the manufacture of a radioactive toothpaste that became the choice of the German army.

Prof Anne-Marie Glenny, also from the University of Manchester, said the widespread availability of fluoride toothpaste made the impact of fluoridating water less significant.

Some children will use the 23 million toothbrushes and toothpastes donated by Colgate to the programme.

Yet even with the proliferation of fluoride-containing toothpastes and dental sealants, tooth decay is still the most common chronic disease affecting American children, and the average senior citizen is missing at least 10 permanent teeth.