9. The nature of tooth enamel and tooth paste are
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The nature of tooth enamel and tooth paste are
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The nature of tooth enamel and tooth paste are
Extra Knowledge :-
- Enamel is the hardest substance in the human body and covers the outer portion of the teeth. It is made up of mineral salts (of calcium and magnesium) and keratin (a protein). It can withstand quite high pressures.
Human have four different types of teeth :-
- Incisors
→ Incisors are used for cutting of food.
- Canines
→ Canines are used for tearing of food.
- Premolars
→ Premolars are used for grinding of food.
- Molars
→ Molars are also used for grinding of food.
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