Definition of protusion - What it is, Meaning and Concept

It is likely that we have heard or read the term protusion on numerous occasions, however, if we go to the dictionary of the Spanish Royal Academy (RAE) , we will notice that the concept is not part of it.

Why, then, protusion is a frequently used concept? It is an incorrect derivation of protrusion (the process and consequences of protruding: the movement of an organ beyond its location or its usual limits).

Protrusion, therefore, comes from protruding.This verb , meanwhile, derives from the Latin protrudere .All these notions have been used by doctors for quite some time time: since the word protrusion was recently accepted by the RAE in 2001 , for many years he lived with the word protusion.

Therefore, even In the medical literature, the idea of ​​protusion is likely to be mentioned.The meaning of both terms, of course, is identical: a protusion or a protrusion can refer to a prominence , a protuberance or a hernia .

When someone refers to a disk protusion , they will be mentioning the existence of what, in a correct way, should be mentioned as disk protrusion or as herniation disc .This physical disorder refers to a displacement that occurs in the intervertebral disc and can cause neurological problems.

The mandibular protusion or mandibular protrusion , meanwhile, refers to the movement of the lower jaw forward, without losing the established contact with the upper jaw.displacement involves several muscles , bones and ligaments, which allow the mobility of the area.

Within the various movements of the jaw, we can differentiate between the following three that the lower jaw is capable of: descent and elevation; protrusion and retrusion (also called forward and backward projection, respectively); laterality (also known as diduccion ).

While the movement of protrusion and retrusion is very limited in our species, the same does not happen with rodents, for example.When a mouse projects its lower jaw forward, its two condyles ( Rounded protrusions of the bones, located at their extremities with the function of assembling an articulation when fitting into the hollow of a second bone) leave the glenoid cavity (a depression of Shallow depth above the mandibular condyle) and located below the so-called transverse root.

In this way, through the movement of protusion, the lower dental arch is placed at a distance Approximately 5 millimeters ahead of the upper one, and it just returns to its original position.Sometimes, this is done with the aim of cutting some foods that are then taken to the back of the mouth to be crushed For this reason, the harmony between pi Anterior and posterior teeth are essential, since the latter should not interfere with the incision process, which could occur if working with some of the superiors.

The name of protrusive tooth contact is known to any encounter between the different teeth teeth during the protrusion movement.

With regard to retrusion, it is interesting to note that in the mid-twentieth century Dor Ulf Posselt discovered that most human beings can only move their jaw backwards a distance of 1 millimeter , approximately, something that has been confirmed several times since then by various specialists.This distance is common to almost any jaw, regardless of the type of occlusion present , either "bad" or "good" , even for cases of malocclusions , several types of abnormalities that occur during the growth of the jaw or jaw bones.