Occlusion

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occlusion

[ə′klü·zhən]
(anatomy)
The relationship of the masticatory surfaces of the maxillary teeth to the masticatory surfaces of the mandibular teeth when the jaws are closed.
(computer science)
In computer vision, the obstruction of a view.
(engineering)
The retention of undissolved gas in a solid during solidification.
(medicine)
A closing or shutting up.
(meteorology)
(physics)
Adhesion of gas or liquid on a solid mass, or the trapping of a gas or liquid within a mass.
(physiology)
The deficit in muscular tension when two afferent nerves that share certain motor neurons in the central nervous system are stimulated simultaneously, as compared to the sum of tensions when the two nerves are stimulated separately.

Occlusion

 

the absorption of a substance from a gaseous medium by solids or melts. During occlusion, gases are absorbed by the entire volume of the absorbent rather than by the surface layer. In this sense, occlusion is similar to absorption, which is the dissolution of gases in liquids.

The most common type of occlusion involves the absorption of gases by metals; for example, hydrogen is occluded by metals of Group VIII of the periodic table of elements. At room temperature, one volume of iridium absorbs more than 800 volumes of hydrogen, and one volume of palladium absorbs more than 700 volumes of hydrogen. The occluded gas interacts with the metal to form a solid solution; sometimes a part of the gas combines with the metal to yield other chemical compounds, for example, hydrides and nitrides.


Occlusion

 

(also bite), the relationship between the surfaces of the upper and lower teeth when in contact. The various forms of occlusion are established only when all the permanent teeth are present. With normal occlusion, each upper tooth, except the central incisors and the wisdom teeth, must touch the corresponding bottom tooth and the tooth behind it when the jaws are in contact. The sagittal surface passes between the central incisors of the upper and lower jaws.

There are four types of physiological occlusion. With orthognathous occlusion, the front teeth of the upper jaw cover the corresponding teeth of the lower jaw. Biprognathous occlusion is similar but with a more pronounced slant forward of the upper and lower teeth and of the alveolar processes. With a straight bite, the front teeth close on the edges of the incisors, and with an opisthognathous bite, the front teeth of both upper and lower jaws are inclined backward.

Pathological occlusion, which includes overbite, decreases the chewing efficiency of the teeth. It may be a congenital anomaly of development of the dentomaxillary system or a result of tooth removal or jaw disease or injury.

REFERENCES

Gavrilov, E. I., and I. M. Al’shits. Ortopedicheskaia stomatologiia. Moscow, 1970.
Kurliandskii, V. Iu. Rukovodstvo k prakticheskim zaniatiiam po ortopedicheskoi stomatologii, 3rd ed. Moscow, 1973.

A. I. RYBAKOV

occluded front

occluded frontclick for a larger image
Fronts formed by the merging of cold and warm fronts. If a cold front overtakes a warm front, the result would be an occluded front. Also known as a frontal occlusion or an occlusion. See also front.
References in periodicals archive ?
Group A patients provided with balanced occlusion appears to be better in overall satisfaction but results are statistically insignificant in both groups.
The study aimed at comparing balanced occlusion with canine guided occlusion.
Peroz6 underscored canine guided dentures as esthetically more acceptable to patients when compared to balanced occlusion. The present study noted that satisfactory chewing ability also had an effect on high rating of esthetic appearance and vice versa.
Median (IQR) of mean weight of masticated Peanuts at swallowing threshold was 1.24(0.52) g in lingualized occlusion group and 1.47(0.46)g in balanced occlusion group.
The statistically significant result of this study proved the hypothesis that masticatory efficiency is better with complete dentures fabricated by lingualized occlusal scheme as compared to those fabricated by bilateral balanced occlusion.
Masticatory efficiency in denture wearers with bilateral balanced occlusion and canine guidance.
Patients in his study expressed better chewing ability with lingualized occlusion dentures, suggested that lingualized occlusion is effective in masticating or cut food, and are the form of occlusion having a high cutting potential compared to bilateral balanced occlusion.
It was reported that the chewing ability of patients with lingualized occlusion and those with bilateral balanced occlusion was 44.5 Percent and 46.8 Percent respectively.
Statistics Balanced occlusion Lingualized occlusion P-Value