1) What is tooth decay? a) The destruction of a tooth’s hard tissues caused by acids from bacteria b) The natural growth of enamel that makes teeth stronger. 2) Which is a main cause of tooth decay? a) Bacteria feeding on sugars and producing acid. b) Drinking only water every day. 3) Which of the following is a risk factor? a) Brushing twice a day with fluoride toothpaste. b) Poor oral hygiene. 4) What happens during the initial stage of tooth decay? a) White spots appear on the enamel. b) The pulp is immediately infected. 5) Which is a common symptom of tooth decay? a) Stronger enamel and no pain b) Tooth sensitivity to hot or cold foods.

TOOTH DECAY

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