Question

Is pH change cause a tooth decay ????

Answer 1

hi friend!

pH change in mouth causes tooth decay.Saliva can help neutralize the acid, but the pH of saliva can become more acidic after eating acidic foods. when the mouth pH drops to 5.5 then tooth decays. This is because the acid is strong enough to attack the enamel which is made of calcium phosphate.
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hope this helps you.... :)

Answer 2

heya!!

tooth decay starts when the pH of the mouth is lower than 5.5.tooth enamel, made of calcium phosphate is the hardest substance in the body. it does not dissolve in water ,but is corroded when pH in the mouth is below 5.5 bacteria present in the mouth produce acids by degradation of sugar and food particles remaining in the mouth. 

the best way to prevent this is to clean the mouth after eating food .using tooth pastes ,which are generally basic neutralize the excess acid and prevent tooth decay.

hope it helps 
^^"