The bacteria present on unclean teeth convert the sugar in food into a substance 'X' which causes tooth decay. Name the substance 'X'. Which part of the teeth does it affect.
for class 7
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Answers
Answer:
There are several kinds of bacteria which are present in a tooth which is unhygienic or is not clean, the role of the bacteria is to convert the sugar or the leftover food in the tooth into a lactic acid.
When the acid is formed it decays the enamel on the tooth and this also affects dentin. Another bacteria which is produced in the tooth is known as plaque which affects the enamel of the tooth too.
Explanation:
Answer:
Explanation:
The bacteria present on unclean teeth convert the sugar in food into a substance 'plaque'
The bacteria act on the sugar present in the left over food particles sticking to the teeth to form acid. The acid thus formed eats up enamel and dentine of the tooth gradually and ultimately makes a cavity in the tooth. When this cavity reaches the pulp cavity of the tooth (which contains nerves) , our teeth become painful and we get toothache