Question

which constituents is use to prevent tooth decay? 1) Calcium carbonate 2) Calcium fluoride 3) Phosphate

Answer 1

Calcium fluoride is very effective in preventing tooth decay due to its many favorable properties.

Given below are a few reasons as to why it is used in case of tooth decay.

1• It has anti - bacterial properties and thus prevents tooth decay.

2• It hardens the enamel and prevents tooth decay.

Answer 2

Calcium fluoride

The correct answer is option (2) i.e. Calcium Fluoride. It has a chemical formula of  $\bold{CaF_2}$ . It is used in preventing tooth decay because it has quite a number of favourable characteristics. Few of the characteristics are as mentioned below:

1. It helps in remineralizing the enamel of our teeth, which is also the hardest substance of the body.

2. It prevents the formation of acids like bacterial acid which are harmful for our teeth which in turn also prevents tooth decay.

3. It strengthens the teeth, hence, preventing tooth decay.