Intro To Teeth Anatomy




Teeth

 

ANATOMY IS THE STUDY OF THE INTERNAL AND EXTERNAL STRUCTURE OF THE BODY.

Knowledge of the anatomy of teeth is indispensable not only in order to understand the pathological process, but also the possible therapies.

Teeth are found in the oral cavity, and their roots are inserted in the alveolar processes of the upper and lower jaw.

The permanent dentition of an adult is composed of 32 teeth, indicated with Arabic numbers from 1 to 8.

Teeth are identified as: INCISORS, CANINE TEETH, PREMOLARS AND MOLARS.

Teeth Anatomy and the component of a Tooth

The tooth is composed of two parts: the CROWN and the ROOT.

Two different types of dental tissues cover these two structures.

The line of junction between the crown and the root is called the CEMENTUM-ENAMEL JUNCTION (CEJ – NECK).

The CROWN is the part of the tooth that emerges from the bone and it is covered by Enamel.

The ROOT is the part of the tooth that is inserted into the bone and it is coated by Cementum.

In healthy conditions of the oral cavity it is not visible.

In clinical practice, the dental arches are usually distinguished in 4 quadrants, tracing two lines: a horizontal line that divides the upper arch from the lower one, and a vertical line that passes between the 2 central incisors of the upper and lower arch.

These lines thus delimit two upper quadrants (Right and Left) and the two lower quadrants (Right and Left) and this division makes it possible to indicate the precise position of teeth.

Conventional abbreviations are used to indicate each tooth and its location.

The most commonly used system to effect annotations in clinical charts and to communicate among operators, is the following: the quadrants are numbered from 1 to 4, starting form the right upper jaw and proceeding in the clockwise direction.

The number of the tooth is combined with the quadrant in which the tooth is located.

Therefore, a number composed of two figures is assigned to each tooth: the first indicates the quadrant and the second indicates the single tooth.




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