centration of fluoride released from the dissolved enamel or already present on the plaque, the more will remineralization be favored and carious process be slowed. − Use of topical fluoride raises the fluoride level of tooth surface and underlying tissues to a level expected to protect against caries.
Mechanisms of anticaries action of fluoride3. Antibacterial effects of fluoride − Inhibition of enzymes essential to cell metabolism and growth. − Lower the surface energy of the tooth. − Can strip off bacteria from hydroxyapatite. Fluoride can bind more effectively to positively charged areas on the apatite crystal than can the bacteria.
Dental benefits• Fluorosis of the deciduous teeth is rarely seen and is not a problem.• First 2 to 3 years of life are the most critical period for the development of mottled enamel on the permanent anterior teeth and for this reason only. – 0.25 mg/day is prescribed from birth until 2 years of age.
Dental benefits – 0.5 mg/day from 2 to 3 years of age. – 1.0 mg/day from 3 until 13 years of age.• Use of fluoridated water or fluoride supplements as early as 1 year of age enhance the formation of the relatively caries – resistant fluorapatite in the enamel surface.