Question

Write a detailed note on structure of teeth?  

Answer 1

Human has two types of teeth in their lives: -

i) Milk Teeth are the first set of teeth. They come through the gums when

baby about six months old. All twenty teeth are formed in 2 years.

ii) Permanent Teeth are formed when milk teeth drop out in the age of six

years.

Structure of Tooth: -

A tooth has two permanent parts: -

i) Crown is that part of tooth which project out of the gums and jaws.

ii) Root of the tooth is embedded into the gums and is therefore hidden.

A tooth is consist of four parts which are as under: -

Enamel: -

This is outermost hard layer, which give luster to tooth. It is formed with

calcium salts. It give tooth beauty and protection. If enamel is removed tooth

start decaying.

Dentine: -

It is second layer present behind the enamel. These cells keep on adding more

dentine to tooth.

Pulp: -

Inner most part of tooth is made up of soft connecting tissue and is called the

pulp. The dentine cells get their food from pulp. The cells of pulp are sensitive

to hot and cold and can produce pain e.g. toothache.

Cement: -

It is thin layer of very hard material covering the dentine at the root of the

tooth. The fibers which hold the tooth in jaws are embedded in the cement.