The is tooth
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A tooth is a hard structure found in the jaws of many vertebrates that is used to break down food. Teeth generally have three parts - the crown, neck, and root. They also have four sections - enamel, dentin, cementum, and pulp. Teeth help with chewing, speech, facial appearance, protection, and jaw development. Humans have two sets of teeth - 20 deciduous (baby) teeth that start erupting at 6 months and are replaced by 32 permanent teeth starting at age 6.
The is tooth
- 1. What is tooth? A tooth is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes.
- 2. Parts of tooth Generally tooth have three parts 1. Crown 2. Neck 3. Root It is also divided into four the sectional parts. 1. Enamel 2. Dentin 3.Cementum 4. Pulp
- 3. Parts of a tooth
- 4. Functions of teeth Helps in mastication. Aid in articulation and speech. Give shape and beauty of face. Help in self protection and attack. Contribute to growth of the jaw.
- 5. Number of teeth Deciduous teeth : 20 in number, 10 in each jaw. They start appearing in the mouth at the age of 6 months and continue to do so till the age of 2.5 to 3 years. The deciduous teeth are :- Central incisor - 4 in number Lateral incisor - 4 in number Canine - 4 in number First molar - 4 in number Second molar - 4 in number Total - 20 in Number.
- 6. Number of teeth Permanent teeth : 32 in number, 16 in each jaw. They start appearing at the age of 6 years. By the age of 13 years, 28 teeth have erupted. The third molar or wishdom teeth appear any time between 18 to 25 years. The permanent teeth are Central incisor - 4 in number Lateral incisor - 4 in number Canine - 4 in number First premolar - 4 in number Second premolar - 4 in number First molar - 4 in number Second molar - 4 in number Third molar - 4 in number Total - 32 in number.