Fluoride is a naturally occurring mineral found in rock,
soil, plants and water sources. "Water fluoridation" is the
controlled addition of fluoride to a community's water supply to adjust the
amount of fluoride to a level that is ideal for dental health. Natural sources
of water, such as seawater, can contain much higher levels of fluoride than the
level of fluoride added to community water supplies.
How were the dental benefits of fluoride discovered?
In the early 1900s, a dentist in Colorado noticed that most
local people had very little tooth decay. Research eventually linked the lack
of tooth decay in the community to the natural levels of fluoride in the water
supply. When another small town in Michigan achieved a dramatic reduction in
tooth decay after adding fluoride to the town water supply in 1945, the world
soon followed.
In 1953 Beaconsfield, Tasmania (now famous for its mine
rescue) became the first Australian town to adopt water fluoridation and all
Australian capital cities except Brisbane followed in the 1960's and 70's. The
Queensland town of Townsville fluoridated its water supply in 1963, with
subsequent studies showing that children in Townsville have significantly fewer
cavities than children in Brisbane.
How does fluoride work?
Tooth decay begins when acids in plaque damage the outer
surface of the tooth (the enamel). Fluoride acts in three main ways to
strengthen teeth and make them more resistant to tooth decay:
It improves the chemical structure of the enamel, making it
more resistant to acid attack.
It reduces the ability of the bacteria on your teeth to
produce acid.
It promotes repair of any early damage to the enamel.
Research over the past fifty years has shown conclusively
that fluoride at the recommended levels in the water supply strengthens teeth
and protects them against decay. Other benefits include the saving of time and
money that people need to spend on dentistry.
Is fluoride safe?
At the recommended level of around 1mg/litre, or one part
per million, there is no scientific evidence of any harmful effects from fluoride
in our water supply. According to the World Health Organisation, fluoridation
of public water supplies is the most effective public health measure for the
prevention of dental decay. Water fluoridation is recognised as one of the ten
most significant public health measures of the 20th century.
Who benefits most from water fluoridation?
People of all ages can benefit from community water
fluoridation. Fluoride has special benefits during tooth development so it is
especially important to get the right amount of fluoride as a child. For adults
who wish to keep their natural teeth throughout their lives, daily fluoride
plays a continuing role in keeping teeth healthy.
How much fluoride do I need?
Drinking fluoridated water throughout the day is the safest
and most cost effective way to ensure your teeth get the benefits of fluoride.
Using fluoride toothpaste everyday increases the benefits. This combination is
considered optimum for most people. For children under six years of age, daily
intake of fluoridated water and a low fluoride (400 or 500 ppm) toothpaste is
recommended. From age six, children should begin using fluoridated adult
toothpaste. Some individuals may need additional fluoride to maintain good
dental health. A dental professional can advise on other sources of fluoride
that would be helpful for such individuals.
Article from: ahm.com
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