Preventative Dentistry » Fluoride
Fluoride is a naturally occurring mineral found in water in varying amounts, depending on which area of the UK you live in, and has the benefit of protecting teeth by stopping the process of tooth decay. Dentists recommend that children and adults should brush their teeth using toothpaste that contains fluoride. Children should use a toothpaste with a fluoride level of 1000ppm until age 3, after which time all children and adults should use a toothpaste containing 1450ppm of fluoride. For those who are particularly prone to tooth decay or sensitive teeth, mouthwash or toothpastes containing higher concentrations of fluoride are available and may be advised.
Fluoride varnish is another treatment that can be used to help protect against tooth decay. The varnish contains high levels of fluoride and is painted onto the surface of both baby and adult teeth. It works by strengthening the tooth enamel, making it more resistant to decay. Ask your dentist if you would like more information on the benefits of fluoride.
http://www.nhs.uk/conditions/Fluoride/Pages/Introduction.aspx