Dental caries is prevented by -: (A) Iron, (B) Fluoride, (C) Iodide, (D) Iron
Answer is B. Flourine is most abundant element in nature. Flourine is a double edged sword. Prolonged excess intake results in dental and skeletal flourosis .Inadequate intake result in dental caries.Use of flouride is most effective way of preventing dental caries. Recomended level of flourides in drinking water is 0.5 - 0.8 mg per litre. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 625