ÜDS-Sağlık 2002-1 Soru=8

We learn from the passage that calcium fluoride ---- .

The government of Britain is again looking at
fluoridation of the public water supply as a
possible means of achieving nationwide
improvements in dental hygiene. To the casual
observer, given the highly erroneous impression
that the presence of fluoride in toothpaste is
beneficial in the prevention of dental caries, such
a measure may understandably appear desirable
and worthy of public support. However, many
water authorities across the country have long
understood the risks associated with fluoridation;
but the government and the various official
organizations that support such a measure
continually deny these risks. It should be realized
that there are two forms of fluoride. One of these
is calcium fluoride, which is a natural substance
occurring in water at very low levels of 0.01-1
parts per million and a substance which the
various organizations involved in promoting
fluoridation constantly draw attention to when
attempting to justify their case. The other form of
fluoride is sodium fluoride, which occurs alongside
various related substances such as fluosilicic acid
and is an extremely dangerous industrial byproduct
produced by such industries as
aluminum, ceramics, phosphate fertilizers and
nuclear power. This form of fluoride is an
accumulative poison even more toxic than lead
and only slightly less toxic than arsenic.