Dental Formula

dental formula anatomy

The dental formula refers to the number and types of teeth a human has. Teeth crush and cut the foods we eat so that we can much better digest them for nutrition. All mammals have 4 kinds of teeth: molars, premolars, dogs and incisors.

An adult usually has a total of 32 teeth (knowledge teeth consisted of). Read on to discover what is the dental formula and the functions of various kinds of teeth.

The plan of teeth in a mouth is revealed by a dental formula, which tells us the number of teeth there are in a quadrant.

dental formula of adults

Dental formula of adults

Dental formula for an adult human

I – 2/2 C – 1/1 P – 2/2 M – 3/3 = 16 x 2 = 32.

The letters I, C, P, and M mean incisors, canines, premolars, and molars respectively. I – 2/2 methods there are two incisors in a quadrant of the oral cavity, therefore there are 2 +2 4 incisors in half of jaw. For the entire set of teeth it’s 4 +4=8 incisors. The very same chooses canines, premolars and molars. So the overall number is 8 +4 +8 +12=32.

Types of Grownup Teeth and Their Functions




The Incisors lie at the front of your mouth in the central position. There are 4 incisors present on the leading and 4 of them line the bottom. The job of the incisors is to bite the food you eat. Incisors are the very first of the baby teeth to emerge when you are around 6 months old. The adult incisors replace the baby ones at around 6 years of age.


The canines are the sharpest teeth we have and have a pointed edge. The job of these teeth is to tear the food specifically meat. The dogs are 4 in number and generally grow when the kid reaches the age of 20 months.


Human beings have eight adult Premolars, four of them on one side of the mouth and the other four on the other side. These teeth carry out the task of grinding the food in to smaller sized particles. The age at which the premolars begin appearing is between 10 and 11 years. These teeth are also referred to as bicuspids.


We have a total of eight molars in our adult teeth set with four of them lining the upper jaw and four of them on the lower jaw. The very first and second molars appear at age 6 and 13 respectively and carry out the job of chewing the food we eat. The last of the teeth to appear are the 3rd molars which are also described as wisdom teeth. You are not going to grow these up until you have to do with 17 years of ages. A great number of people never ever grow these teeth while those who do need to get them removed as they trigger a great deal of pain when emerging and are the significant reason for crowding of teeth.

The deciduous (milk) teeth definition

Whereas an adult human has 32 teeth, a kid as much as about the age of 6 has only 20 teeth. These are the milk teeth or deciduous teeth which are gradually replaced by the irreversible teeth after the age of about 6 years. There are no molars in the milk set but the teeth representing the premolars are known as the milk-molars and perform the same grinding function.

The face of a six-year-old child showing the milk teeth in position and the establishing irreversible teeth (in red).

The first milk teeth to appear (break through the gums) are normally the two central incisors in the lower jaw. These usually appear in between eight and 10 months after birth. (See teething.) Then, in a relatively routine order which takes 18 months to 2 years, an additional 18 teeth push their way through the gums. By the time a child is 2 or 2 1/2 years old it must have a full set of 20 teeth. Although rather little, the milk teeth are extremely strong and well able to deal with the hardest foods that the kid might encounter.

The teeth are formed with the drug of the jawbones; the maxilla above and the mandible listed below. As they emerge they have to press their method through the tissues which cover the bones and in this procedure can cause marked inflammation. In a baby this is enough to trigger a temperature and substantial disturbance of appetite and well-being.

Dental formula table of human child

Dental Formulae
Deciduous 2 1 0 2
2 1 0 2
= 10 Permanent 2 1 2 3
2 1 2 3
= 16
Tooth Eruption
  Deciduous Permanent
Incisors 6 – 10 months 7 – 8 years
Canine 16 – 20 months 11 years
Premolars 11 – 13 years
Molars 10 – 24 months 6 – 25 years

Last Update - September 21, 2017


The Author

Reyus Mammadli

As a healthy lifestyle advisor I try to guide individuals in becoming more aware of living well and healthy through a series of proactive and preventive measures, disease prevention steps, recovery after illness or medical procedures. Education: Bachelor Degree of Medical Equipment and Electronics.

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