Teeth aid in using the mouth for eating, speaking, smiling, and shaping the face. Each kind of tooth has a name and a particular purpose.
Children have 20 teeth till the age of 10
Normal adults have 32 teeth in total
Layers of teeth :
The four layers of teeth are : Enamel, dentin, pulp, and cementum
1. Enamel - The outside of the tooth is covered in enamel, the toughest component of body.
2. Dentin - The second layer of the tooth, is softer than enamel.
3. Pulp - Pulp, the lowest layer, is made up of nerves and blood vessels.
4. Cementum - Under the gums, on the root of tooth, is cementum.
Parts of teeth :
1. Incisors
The cutting teeth that bite into food and separate it into smaller pieces are known as incisors. They have a narrow edge and are flat. Eight incisors are present in both children and adults, with two on each row at the front of the mouth four central incisors.
2. Canines
The teeth that sit next to the incisors and resemble fangs are called canines. People use their canines, which are the longest teeth among all of their teeth, to rip food. Adults and children both have four canines. Between the ages of 9 and 12, most children receive their first set of permanent teeth.
3. Premolars
Bicuspids, also known as premolars, are larger than incisors and canines. They aid in chewing and chopping up food and have several ridges. Premolars are eight in adults. The molars that are located adjacent to the canines are the first and second premolars. Premolar teeth do not erupt in young children. When children are 10 to 12 years old, these emerge for the first time as permanent teeth.
4. Molars
The largest tooth of them all is the molar. They can chew and grind food thanks to their huge, flat surface ridges. Children have eight primary molars, but adults have 12 permanent molars, six on each side of the jaw. The last molars to erupt are wisdom teeth, or third molars, which usually come through between the ages of 17–21.