Tooth Decay

Biology

Concept: Tooth Decay

Dental caries or tooth decay causes gradual softening of enamel and dentine. It begins

when bacteria acting on sugars produce acids that softens or demineralises the enamel.

Masses of bacterial cells together with food particles stick to the teeth to form dental

plaque. Saliva cannot reach the tooth surface to neutralise the acid as plaque covers

the teeth. Brushing the teeth after eating removes the plaque before the bacteria

produce acids. If untreated, microorganisms may invade the pulp, causing

inflammation and infection.

So, to prevent, going to the dentist, and taking that pain, basic toothpastes must be used, that keep the pH of mouth OK, and prevent bacteria from flourishing.

Tooth decay may also start when the pH of mouth drops less than 5.5. In this acidic pH, bacteria start multiplying, and create acids, which further degrade the tooth enamel.