Dental Problems

Dentition – Knowing about Dentition

DentitionDentition

refers to the development of teeth and their arrangement in the mouth. It pertains to the characteristic arrangement of the teeth with the number of teeth in a given species at a given age. The number, type, and morpho-physiology of the teeth is collectively called as dentition.

Humans have 4 types of teeth. They are described as follows:

Incisors:

These are the front most teeth in the jaw. They are also called “Cutting teeth.” Incisors are used for the initial biting of food. They have a straight sharp cutting edge and one root.

Canines:

They are also called stabbing teeth. These are normally only 2 pairs of canines per jaw, one each side. They are sharp edged and used to bite into food. They are used with the incisors to kill prey in animals. Canines, like incisors, have one root.

Premolars:

We use premolars to crush and grind our food. They are similar to molars in function and form. The upper surfaces of premolars have a broad top instead of a sharp biting edge. The tops are lumpy and small irregular lumps are called cusps. They are also called as bicuspids for they have two cusps. The upper premolars have two roots and other have one root.

Molars:

Molars are larger than premolars. They are many common things in molars and premolars. Like premolars they are used for crushing and grinding food. Like premolars their upper surfaces have ridges or cusps on them. Molars have 2 to 3 roots and 3 to 5 cusps. In humans, the third molars those closest to the back of the mouth “Wisdom teeth.”

Note:

If the jaw bone is small and not grown enough to accommodate all the teeth in it, the wisdom teeth grows compacted. This condition is known as “impacted wisdom teeth.” Here the teeth becomes painfully wedged between the 2nd molars and the back of the jaw bone.

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