Types Of Teeth And Their Function

Learn about different types of teeth and their function

We humans have a habit of taking things for granted until something goes wrong. The same goes for our teeth. Teeth play a vital role in our everyday lives. It is not needed only for chewing and proper digestion of food but plays an equally important role in speech. Ultimately it impacts our overall health. We just cannot live a healthy life without them.
We, humans, have two sets of teeth one is the primary or baby teeth, and the other is permanent or adult teeth. Primary teeth develop first but are replaced by permanent teeth at a certain age.

Some interesting facts about human teeth

According to a dental professor, Dr. Shantanu Lal teeth generally erupt in a perfectly symmetrical manner. It means the molar on the left side of the jaw and the molar on the right side of the jaw will develop or grow at the exact same time.

The development of the tooth starts long before the tooth is visible. The first tooth of a baby appears somewhere between 5 to 6 months. However, it actually starts developing from the second trimester of pregnancy.
The tooth's crown develops first, however, its root keeps on developing even after the tooth is erupted and visible.

The total number of teeth present in the human jaw are 32. However, it sometimes varies.
A baby has 20 primary teeth which started falling from around the age of seven. These primary teeth are replaced by the permanent or adult set of teeth.

Parts of a tooth
A tooth is mainly divided into two parts the root and the crown. The crown is the visible part of the tooth while the root is present in the gum. The root gives stability to the tooth and also connects it to the jaw.
A tooth consists of four different kinds of tissues. Each is having its own specific job. It includes enamel, dentin, cementum, and pulp. Let's learn in detail about them.
Enamel- The enamel is a really hard substance which covers the crown and protects the vital tissue that is present in the tooth.Enamel is naturally white and that's the reason behind white teeth so protecting the Enamel helps keeping teeth whitening products mainly whitening toothpaste helps in keeping the enamel intact and thus preserve natural color of it. Enamel is the hardest part of a human body made up of calcium, phosphorus, and hydroxyapatite.

Dentin- Dentin is found under the enamel. It looks similar to the bone but is not that strong. That's the reason why it is at a greater risk of decay.
Cementum- The cementum is relatively softer than enamel and dentin. This tissue covers the root of a tooth. It is really prone to damage and decay, and thus one must take its proper care. Cementum is present just behind the gums. It is light yellow color tissue which can easily get infected if the gum covering it shrinks or get damaged.
Pulp- Pulp is situated in the core of the tooth. Blood vessels and never which delivers nutrients and signals to the tooth is present in the pulp.
Types of teeth and their function.

The main purpose of teeth is to chew food and tear it into smaller pieces to make the digestion process easy. In addition to that, they also play a crucial role in speaking. In total there are 32 teeth present in the mouth. These 32 teeth are not exactly same in shape and size. They are basically divided into five different types namely incisors, canines, premolars, molar, and third molars. Let's have a close at each of them along with their functions.

The first in the are incisors. They are totally 8 in numbers. Four in the top jaw and four in the bottom. Incisors are the first teeth present in the mouth. They are also the first teeth to erupt. The primary set of incisors starts erupting from the age of 6 months, and it's adult or permanent set at around seven years.

Function of incisors
Incisors teeth are used for the purpose of biting. They have sharp edges which cut the food. Incisors work in a similar manner to a knife.

Canines are also known as fangs. They are the second type of teeth which erupts after incisors. The total number of canines are four: two in the bottom and two at the top. They are present just after the incisors and serves as the boundary line between the incisors and the premolars.
Function of canines
Canines are the sharpest teeth. They are long and pointed which penetrates into the food. The main function of canines is to tear foods like meat and chicken.

Premolars also known as bicuspid are the third type of teeth. A human has eight premolars, two on both sides of the top jaw and two on both side of the bottom jaw. The development of premolars is quite different as there is no primary premolars tooth. The adult pair of premolars starts appearing at around 10 to 12 years.
Function of premolars
Premolars or bicuspid are used for chewing and grinding the food. They break down the food into fine particles.
Molars are the fourth in the line. They are broad in shape and thus are more prone to bacterial infection which ultimately results in decay. Molars are also eight in total: four in the top jaw and four in the bottom.
Primary molars start erupting between the age of 12 to 28 months. These primary molars are replaced by bicuspid or premolars at a certain age.
The permanent set of molars starts coming at around six years of age.
Function of molars
Molars also work in the same way as premolars. They are also used for the purpose of grinding the food that we eat to make it easy to digest.
Third Molars
Third molars are also said as wisdom teeth. They start appearing from around 18 years of age. They are last teeth to erupt. Third molars could be said as optional teeth as they are rarely used that's the reason why some people do not have the third molar.
Function of third molars
Third molars if present is used in the same way as premolars and molars. However, we rarely use them as they are present in the corner of the jaw.
So now you know how important your teeth are. Thus make sure you take its proper care, brush twice a day regularly and visit your dentist for a cleaning and regular checkups. A healthy mouth means a healthy you.


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