Question

tooth decay starts when the pH of the mouth is lower than 5.5 (a) state the cause of lower pH in our mouth (b) how can tooth decay be prevented?​

Answer 1

the cause of lower pH in mouth is increased content of acid.this acid damages the enamel,which is the hardest substance in human body.tooth decay can be prevented by brushing twice a day as,tooth paste contain base which neutralisis the  effect of  acid .

Answer 2

1. this is because the pH value of the tooth decay decreases due to the acid content increases in the mouth why the certain bacteria and microorganisms when we eat food and this also leads to the corrosion of tooth

2.the tooth decay could be prevented by doing properly brush as the toothpaste Basic in nature and Justin ultimately neutralize the acid effect caused by bacteria and various microorganisms because when acid reacts with base the substances becomes neutral in nature