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The Molar – Structure & Function

by Tijana

The molar has many functions in the human dentition. It is part of an ingenious system that takes on a variety of functions when eating. Every single tooth has an individual structure and can be clearly distinguished from the others. We explain to you what a molar looks like and which functions it takes on.

molar

Which tooth is a molar?

Molars are also known as posterior teeth or molars. The molars include all teeth beyond the front and canine teeth. In the deciduous dentition, there are 2 deciduous molars in each half of the jaw.

In the permanent set of teeth, there are two smaller anterior molars in each half of the jaw which calls premolars. Behind it, there are two, or if there are wisdom teeth, larger rear molars. These are called molars.

Molars – structure

In all mammals, front teeth can be distinguished from molars. The technical term for the presence of different types of teeth is heterodont. In contrast to this, reptiles have homodont teeth.

In humans, the small anterior molars on the chewing surface of the tooth crown have two or three cusps, which separate from one another by furrows (the dentist calls them “fissures”). Most so-called premolars have one root, some (for example, the front premolar in the upper jaw) have 2 roots.

The rear large molars are larger and have 4 or 5 cusps. The molars usually have three-tooth roots, although anatomical deviations are sometimes possible.

Molars – breakthrough

The teeth go through two so-called dentitions. The second dentition follows the eruption of the milk teeth: permanent teeth replace the milk teeth.

  • The first molar usually erupts at six, which is why it calls the six-year molar.
  • This follows by the front teeth.
  • The first premolar breaks with the 10th -12th , the second than with the 11th -13th  year through.
  • The second molar has its breakthrough with the 12th – 14th of age.
  • The last molar tooth breaks through with the 17th – 30th  of  age. That is why it calls the wisdom tooth.

The teeth of the lower jaw are “one step ahead” of those of the upper jaw and appear a little earlier. When the permanent teeth get ready to erupt, they move closer and closer to the milk teeth. Their roots then continue to dissolve, which is why they ultimately fall out and make room for the permanent teeth.

Some people have no wisdom teeth or certain front or molars. These are not created and are also missing after the eruption of all permanent teeth in the row of teeth. In rare cases, there are excess teeth.

Molars – function

Incisors are designed to be able to bite off food. Molars have a wide chewing surface and can grind the food through their cusps and furrows.

For this, the teeth must be in contact with the opposing teeth in the other jaw and with the neighboring teeth. The saliva and the complex movements of the jaws ultimately result in a soft chyme.

Besides, they absorb the chewing force of the jaw and protect the front teeth from overload. It builds them in such a way that they can withstand dominant forces.

Molars are also known as posterior teeth or molars. The molars include all teeth beyond the front and canine teeth. In the deciduous dentition, there are 2 deciduous molars in each half of the jaw.

In the permanent set of teeth, there are two smaller anterior molars in each half of the jaw which calls premolars. Behind it, there are two, or if there are wisdom teeth, larger rear molars. These are called molars.

Molars – structure

In all mammals, front teeth can be distinguished from molars. The technical term for the presence of different types of teeth is heterodont. In contrast to this, reptiles have homodont teeth.

In humans, the small anterior molars on the chewing surface of the tooth crown have two or three cusps, which separate from one another by furrows (the dentist calls them “fissures”). Most so-called premolars have one root, some (for example, the front premolar in the upper jaw) have 2 roots.

The rear large molars are larger and have 4 or 5 cusps. The molars usually have three-tooth roots, although anatomical deviations are sometimes possible.

Molars – breakthrough

The teeth go through two so-called dentitions. The second dentition follows the eruption of the milk teeth: permanent teeth replace the milk teeth.

  • The first molar usually erupts at six, which is why it calls the six-year molar.
  • This follows by the front teeth.
  • The first premolar breaks with the 10th -12th , the second than with the 11th -13th  year through.
  • The second molar has its breakthrough with the 12th – 14th of age.
  • The last molar tooth breaks through with the 17th – 30th  of  age. That is why it calls the wisdom tooth.

The teeth of the lower jaw are “one step ahead” of those of the upper jaw and appear a little earlier. When the permanent teeth get ready to erupt, they move closer and closer to the milk teeth. Their roots then continue to dissolve, which is why they ultimately fall out and make room for the permanent teeth.

Some people have no wisdom teeth or certain front or molars. These are not created and are also missing after the eruption of all permanent teeth in the row of teeth. In rare cases, there are excess teeth.

Molars – function

Incisors are designed to be able to bite off food. Molars have a wide chewing surface and can grind the food through their cusps and furrows.

For this, the teeth must be in contact with the opposing teeth in the other jaw and with the neighboring teeth. The saliva and the complex movements of the jaws ultimately result in a soft chyme.

Besides, they absorb the chewing force of the jaw and protect the front teeth from overload. It builds them in such a way that they can withstand dominant forces.

By chopping up food, they are an important part of digestion. Also, the posterior teeth protect the temporomandibular joint from excessive stress.

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