Question

at what PH in the mouth is tooth decay faster and why

Answer 1

The normal pH of the mouth is 5.5.If it becomes less than that,then tooth decay starts to occur.The conversion of sugars into acids by microorganisms takes place resulting in decrease of the pH of the saliva.These acids dissolve the minerals of the tooth enamel by a process called demineralization.This weakens the tooth and leads to the formation of tooth decay.

Answer 2

Answer:

When the pH in the mouth falls below 5.5, tooth decay starts. Bacteria present in the mouth produce acid by degradation of sugar and food particles which remain in the mouth after eating. The acid produced in the mouth attack the enamel thereby, creating tooth decay.