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Do you know? In mammals especially, the number of teeth in both the jaws varied with respect to their food habit. However, it is constant for a particular species.

When we represent the number of teeths according to their kind by any sort of equation, it is known as Dental Formula.

Now how to write the formula?

• It is the formula showing the no. of teeths in one half of the upper/lower jaw.

• It is separated (i.e. upper and lower jaw) by a horizontal line which is similar to that of a fraction in mathematics.

• The no. of teeth shown in the formulae multiplied by 2, gives the total no. of teeth in a species.

Dental formula of Human.

1. CHILD (milk teeth) - 2 1 0 2 2 1 0 2
2. ADULTS - 2 1 2 3 2 1 2 3

Here:

Here you can see teeth in upper half jaw is 2 + 1 + 0 + 2 = 5. The total no. of teeth in upper jaw is 5 × 2 = 10. And similarly total no. of teeth in child = 10 × 2 ( both jaws) = 20.

In this way, we can find the total no. of teeth in all organisms by the help of given Dental Formula.

Dental formula for more animals:

• Dog - 3 1 4 2 3 1 4 3
• Cat - 3 1 3 1 3 1 2 1
• Cow - 0 0 3 3 1 0 2 3
• Elephant - 1 0 0 3 0 0 0 3

Note!!

The no. is arranged with correspondence with the kind of teeth in order of Incisors, Cannines, Pre molars, Molars in one half jaw in each row.

Dental:-

• Dentistry, also known as dental medicine and oral medicine, is a branch of medicine that consists of the study, diagnosis, prevention, and treatment of diseases.

Types of teeth does normal human have :-

A normal adult mouth has 32 teeth, which (except for wisdom teeth) have erupted by about age 13:

• Incisors (8 total): The middlemost four teeth on the upper and lower jaws.
• Canines (4 total): The pointed teeth just outside the incisors.
• Premolars (8 total): Teeth between the canines and molars.
• Molars (8 total): Flat teeth in the rear of the mouth, best at grinding food.

Dental Formula :-

It is a type of method describing the total number of teeth in man and animals according to the arrangement.

• This formula is expressed using letters and figures.

• The letters used in this formula are based on the 4 types of teeth like– Incisor, Canine, Premolar, and Molar.

Formula is expressed as :-

Humans have two dental formula :-

The dental formula for milk teeth in humans is:

The dental formula for permanent teeth in humans :

Each half of the upper jaw and the lower jaw has 2 incisors, 1 canine, 2 premolars, and 3 molars. An adult human has 32 permanent teeth.