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Question

Why does tooth decay start when the pH of mouth is lower than 5.5 ?


Solution

When pH of mouth is lower than 5.5 tooth decay begins.  The enamel of our teeth  is the hardest substance in our body but gets  corroded when pH of mouth falls below 5.5.Bacteria present in our mouth produce acid due to degradation of sugar and other food particles remaining in the mouth after eating thus accelerating the rate of erosion  of our tooth enamel. 

 Enamel doesn't have  any living cells, which means there is no way it can repair itself.  Any damage done to the enamel on your teeth isa  permanent one.

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