Question

PH changes as the cause of the tooth decay

Answer 1

before we eat food our ph of mouth is 6.5 .when we eat food our mouth bacteria react with other remain food then our ph is less then 5.5
so after food brush your teeth to avoid tooth decay

Answer 2

if pH level goes below 5.5, our mouth becomes acidic which leads to south decay.
enamel is very strong and insoluble in water.
but it corrodes when exposed to acidic atmosphere which is called tooth decay.

tooth paste is basic to neutralize the acidity in our mouth