Anatomy of the Tooth: Curiosities

The teeth are the constituents of the mouth, and each has a function and specific characteristics. Learn more about the anatomy of the tooth.

Anatomy of the Tooth

The term anatomy of the tooth is originally from Latin and is the science that studies the morphology of the tooth.

Through it we can learn how to are made of the teeth both chemically as structurally.

Do you know how many teeth we have in mouth? You know why we two dentições? Know the function of each tooth? These are some of the questions here will be answered.

WHAT IS DIFIODONTE?

Human beings are mammals considered difiodontes and heterodontes.

Some animals have a unique dentition are called monofiodontes (for example: whale and laziness).

Human beings, as well as the dogs, cats, among others, have 2 dentições (the dentition, deciduous and permanent dentition) there are called difiodontes.

But there is still a third group the polifiodontes, these have varied dentições throughout life, such as fish and reptiles.

THE HUMAN BEINGS HAVE TWO TYPES OF DENTIÇÕES

1. DENTITION, DECIDUOUS

This dentition begin to form at around 6 months of age with his training complete by around 3 years. It is also known as the dentition of the milk, temporary, infant, primary, among other terms.

Consists of 20 teeth and they are divided into 10 teeth per arch (upper and lower). In the dentition there are no premolars and there are only 2 molars.

2. PERMANENT DENTITION

Way from 6 years old getting full at around 13 years of age.

In the dentition there are usually 32 teeth and also they are divided by two arcades 16 in each or 8 in each hemi-arcade.

WHAT ARE THE TERMS HOMODONTIA AND HETERODONTIA?

1. HOMODONTIA

Some animals have all the teeth with your dental anatomy semelhentes varying only in volume.

In this case, these teeth serve only to hold the prey to posteior swallowing (crocodiles, fish, dolphins).

2. HETERODONTIA

Most mammals, including human beings, have this type of dentition. These have dental anatomy distinct either in their size, shape and function.

IN OUR 32 TEETH IN THE ADULT STAGE WE HAVE:

1. CENTRAL INCISORS AND LATERAL

8 (4 per jaw) in the sector over the previous arcade.

These are in charge to cut food into smaller pieces.

2. CANINES

4 (2 per jaw) located next to the lateral incisors.

Rasgam, dilaceram e reduzem os alimentos em pedaços menos compactos.

Tear, dilaceram and reduce the food into pieces less compact.

3. PRE-MOLARS

8 (4 per jaw) located between the canines and the molars.

4. MOLARS

8/12 (4/6 by the arch) in the sector more later arcade which can vary according to the existence or non-existence of 3rd molars, the most well-known, such as cisos.

The act of grinding, the grinding of the food to turn the food on the cake the food is carried out by two groups of the teeth: the premolars and the molars.

Both are able to perform this task due to all the ridges, grooves and depressions that exist on their anatomy.

The cake the food until ready for swallowing goes through various stages with that, all of our teeth, their forms so varied and different, have specific functions.

In the failure of some of the teeth failures occur in its production, making the cake the food is deglutido in larger pieces, and the enzymes will act in a way ineffective, releasing vitamins and minerals important for our health.

BUT AS ARE MADE OF THE TEETH?

The tooth is divided into two portions: the portion coronal (visible in the oral cavity) and the root portion (which is located inside the alveolar bone).

1. ENAMEL

In the portion coronal we have the enamel that form a protective variable, on the tooth surface.

Due to its constitution (high content in mineral salts) this is the fabric more strong human body, however it is quite brittle. This is also the fabric that accentuates the tone of the teeth, that is, we can have teeth with a shade more yellowish or more greyish.

These differences occur due to its thickness the smaller the more yellowish is the shade of the tooth because the tissue inside is very yellowed.

In the opposite case, happen because the greyish tint is achieved due to a thickness more opaque, or to be more thick.

Constitution: inorganic material (96%) and only a small percentage of organic material and water (4%). The inorganic material of enamel is similar to a mineral called apatita (which may contain chloride, fluoride or hydroxide).

2. DENTIN

This is the fabric that it is covered by enamel and covers the pulp cavity.

In the teeth of young individuals the dentin has a yellow color-clear. Unlike enamel, which is very brittle, dentin is subject to deformation, light. And is highly elastic. Is something harder than bone but softer than enamel.

The constitution: 30% of the organic matter (collagen fibers and mucopolysaccharides) and 70% inorganic material (crystals apatita as in bone, cementum and enamel).

3. CEMENT

This tissue covers the root canals and is often termed the dentin of the root portion. This presents the same characteristics that the dentin presented only with a location distinct and a shade of yellow lighter.

4. DENTAL PULP

The dental pulp is present in both the portions of the tooth (crown and root), and is the only soft tissue of the tooth.

In the root portion is covered by enamel and dentine, and the root portion by cement.