Question

Fluoride ion
(a)Prevents tooth decay
(b)Non-essential
(c)Toxic even in small quantity
(d)Both B and C

Answer 1

Damage to a tooth, which will occur when bacteria that can cause decay in your teeth make acids and other components that destroy the tooth's exterior and enamel. This can form damage in a tooth known as the cavity.

Complete answer:
Fluoride ion prevents tooth decay. Fluoride ion is formed during the refining of different components and forms fluorosis. Fluorosis is a medical condition where it is defined by the decaying of teeth, bones become abnormal and tend to fracture because of fluorine substitutes for Calcium. Fluorosis generally occurs during the early stage of childhood at the time of the formation of permanent teeth. The major fiction is to prevent the formation of a cavity and decaying of teeth.

Additional Information: Tooth decay can be prevented by brush teeth at least twice per day with toothpaste, rich in fluoride. It is best to brush after every meal and most importantly before going to bed.
-Drinking fluoridated water by adding at least a pint of fluoride into the water can prevent tooth decaying children.
-Chemically fluoride is an inorganic and monatomic anion, which has salts that are mostly white and colorless. Fluoride salts usually have a bitter taste and don’t have any smell.
So, the correct answer ‘Prevents tooth decay’.

Note:
-Water fluoridation applies to both adults and kids for maintaining oral hygiene. Hexafluorosilicic acid along with its salt sodium hexafluorosilicate is usually preferred.
Taking supplements of fluoride, to help in strengthening teeth, prescribed by dentists are effective. Fluoride is present in almost all human tissues including many biofluids like urine, saliva, blood, etc.