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What is the main process behind the decrease in pH during tooth decay?

Answer and explanation

Correct answer: Mouth bacteria make acids from sugar

Dental plaque contains bacteria that metabolise sugars left on the teeth. During this process they produce organic acids. The added hydrogen ions lower the pH at the tooth surface. If the pH remains sufficiently low, minerals dissolve from enamel and decay can begin. Hence option A is correct. Teeth do not manufacture bases, water does not become hydrogen gas, and toothpaste is generally used to help reduce acidity rather than increase it.

Related tags

Tooth DecayPhBacteriaAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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