| 释义 |
occlusion
 occlusiontop: in a cold-front occlusion cold air moves under a mass of warm air and under the cool air in frontbottom: in a warm-front occlusion cool air moves under a mass of warm air while riding over the cold air in frontoc·clu·sion O0021000 (ə-klo͞o′zhən)n.1. a. The process of occluding.b. Something that occludes.2. Medicine An obstruction of an anatomical passage, as of an artery by plaque.3. Dentistry The alignment of the teeth of the upper and lower jaws when brought together.4. Meteorology a. The process of occluding air masses.b. An occluded front.5. Linguistics Closure at some point in the vocal tract that blocks the flow of air in the production of an oral or nasal stop.
[From Latin occlūsus, past participle of occlūdere, to occlude; see occlude.]occlusion (əˈkluːʒən) n1. the act or process of occluding or the state of being occluded2. (Physical Geography) meteorol another term for occluded front3. (Dentistry) dentistry the normal position of the teeth when the jaws are closed4. (Phonetics & Phonology) phonetics the complete closure of the vocal tract at some point, as in the closure prior to the articulation of a plosive occlusal adjoc•clu•sion (əˈklu ʒən)
n. 1. the act of occluding or the state of being occluded. 2. the fitting together of the teeth of the upper and lower jaws when the jaws are closed. 3. Phonet. momentary complete closure at some area in the vocal tract. 4. occluded front. [1635–45; < Latin occlūs(us) (past participle of occlūdere] oc•clu′sive (-sɪv) adj. oc·clu·sion (ə-klo͞o′zhən)1. An obstruction in a passageway, especially of the body.2. The manner in which the upper and lower sets of teeth fit together.Thesaurus| Noun | 1. |  occlusion - closure or blockage (as of a blood vessel)attack - a sudden occurrence of an uncontrollable condition; "an attack of diarrhea"laryngospasm - a closure of the larynx that blocks the passage of air to the lungsembolism - occlusion of a blood vessel by an embolus (a loose clot or air bubble or other particle)thromboembolism - occlusion of a blood vessel by an embolus that has broken away from a thrombusthrombosis - the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vesselcoronary occlusion - occlusion of a coronary artery caused either by progressive atherosclerosis or by a blood clot | | 2. | occlusion - (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloftoccluded frontmeteorology - the earth science dealing with phenomena of the atmosphere (especially weather)front - (meteorology) the atmospheric phenomenon created at the boundary between two different air masses | | 3. | occlusion - (dentistry) the normal spatial relation of the teeth when the jaws are closedspatial relation, position - the spatial property of a place where or way in which something is situated; "the position of the hands on the clock"; "he specified the spatial relations of every piece of furniture on the stage"dental medicine, dentistry, odontology - the branch of medicine dealing with the anatomy and development and diseases of the teeth | | 4. |  occlusion - an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe"blockage, stoppage, closure, block, stopbreech closer, breechblock - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firingimpedimenta, obstruction, obstructor, obstructer, impediment - any structure that makes progress difficultplug, stopple, stopper - blockage consisting of an object designed to fill a hole tightlyvapor lock, vapour lock - a stoppage in a pipeline caused by gas bubbles (especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of gasoline to the carburetor) | | 5. |  occlusion - the act of blocking blockage, closureobstruction - the act of obstructing; "obstruction of justice"implosion - the initial occluded phase of a stop consonant |
Translations
Occlusion
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) occluded front (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. REFERENCESGavrilov, 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 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.occlusion
occlusion [ŏ-kloo´zhun] 1. obstruction.2. the trapping of a liquid or gas within cavities in a solid or on its surface.3. the relation of the teeth of both jaws when in functional contact during activity of the mandible.4. momentary complete closure of some area in the vocal tract, causing breathing to stop and pressure to accumulate. Normal occlusion of the primary molars. From Darby and Walsh, 1994.abnormal occlusion malocclusion.central occlusion (centric occlusion) occlusion of the teeth when the mandible is in centric relation to the maxilla, with full occlusal surface contact of the upper and lower teeth in habitual occlusion.coronary occlusion see coronary occlusion.eccentric occlusion occlusion of the teeth when the lower jaw has moved from the centric position.functional occlusion contact of the maxillary and mandibular teeth that provides the highest efficiency in the centric position and during all exclusive movements of the jaw that are essential to mastication without producing trauma.oc·clu·sion (ŏ-klū'zhŭn), Do not confuse this word with atresia or stenosis.1. The act of closing or the state of being closed. 2. In chemistry, the absorption of a gas by a metal or the inclusion of one substance within another (as in a gelatinous precipitate). 3. Any contact between the incising or masticating surfaces of the upper and lower teeth. 4. The relationship between the occlusal surfaces of the maxillary and mandibular teeth when they are in contact. [L. oc-cludo, pp. -clusus, to shut up, fr. ob., against, + claudo, to close] occlusion (ə-klo͞o′zhən)n.1. a. The process of occluding.b. Something that occludes.2. Medicine An obstruction of an anatomical passage, as of an artery by plaque.3. Dentistry The alignment of the teeth of the upper and lower jaws when brought together.occlusion Cardiovascular disease
Obstruction of a vessel.
Dentistry
Closure of the upper and lower molars.
Medspeak
The complete closure of an orifice.
Ophthalmology
The covering of one eye, either totally or partially, to prevent or reduce visual stimulation.occlusion Medtalk 1. The complete closure of a vessel with gas, liquid or solid.2. Obstruction.3. Closure of the upper and lower molars. See Acute vascular occlusion, Aortic occlusion, Central retinal artery occlusion, Malocclusion.oc·clu·sion (ŏ-klū'zhŭn) 1. The act of closing or the state of being closed. 2. In chemistry, the absorption of a gas by a metal or the inclusion of one substance within another (as in a gelatinous precipitate). 3. Any contact between the incising or masticating surfaces of the upper and lower teeth. 4. The relationship between the occlusal surfaces of the maxillary and mandibular teeth when they are in contact. occlusion (o-kloo'zhun) [L. occlusio, a closing up] 1. The acquired or congenital closure, or state of being closed, of a passage. Synonym: imperforation2. Alignment of the mandibular and maxillary teeth when the jaw is closed or in functional contact. Synonym: dental occlusion See: malocclusion3. The covering of an eye in order to improve vision in the other, e.g., in treating strabismus. acquired centric occlusionCentric occlusion.abnormal occlusionMalocclusion.adjusted occlusion See: equilibrationanatomical occlusionIn dentistry, an occlusion in which the posterior teeth of a denture have masticatory surfaces that resemble natural, healthy dentition and articulate with the surfaces of similar or opposing teeth. The opposing teeth may be artificial or natural. arterial occlusionA blockage of blood flow through an artery. It may be acute or chronic and occurs, for example, in coronary or in peripheral arteries. Patients with acute arterial occlusion have severe pain (as in angina pectoris), decreased or absent pulses, and mottling of the skin of an affected extremity. The occlusion is removed and blood flow restored if possible. balanced occlusionThe ideal and equal contact of the teeth of the working side of the jaw by the complementary contact of the teeth on the opposite side of the jaw. Synonym: balanced bitecentral retinal artery occlusion Abbreviation: CRAO
Blockage of blood flow to the retina (that is, to the central retinal artery or one of its branches), resulting in sudden visual loss. The condition usually affects one eye. When the retinal artery is blocked by a blood clot, early thrombolysis sometimes provides sight-preserving therapy. EtiologyCRAO is typically caused by a tiny embolus that lodges in the retinal circulation. It usually occurs in people with high blood pressure, diabetes mellitus, cardiac valve disease, or atrial fibrillation, which predispose to atherosclerosis or arterial embolization. Other causes include inflammatory or autoimmune diseases affecting the circulation (arteritis), clotting disorders, hyperlipidemia, injected drugs or contaminants, and tumor metastases. centric occlusionIn dentistry, the vertical and horizontal position of the mandible that produces maximal interdigitation of the cusps of the maxillary and mandibular teeth. This is the ideal position or type of occlusion. Synonym: acquired centric occlusion; habitual centric occlusion; intercuspal position CORONARY OCCLUSIONcoronary occlusionComplete or partial obstruction of a coronary vessel by thrombosis or as a result of spasm. Synonym: cardiac thrombosis; coronary thrombosis See: myocardial infarction; illustrationdental occlusionOcclusion (2).eccentric occlusionAny dental occlusion other than centric. habitual occlusionThe usual relationship between the teeth of the maxilla and mandible that represents the maximum contact. This occlusion varies from person to person and is seldom ideal or true centric occlusion. habitual centric occlusionCentric occlusion.occlusion of the pupilIn the eye, a pupil with an opaque membrane shutting off the pupillary area.traumatic occlusionInjury to the tissues that support the teeth because of malocclusion, missing teeth, improper chewing habits, or a pathological condition that causes a person to chew abnormally.working occlusionThe usual method of contact of teeth as the mandible is moved to one side during chewing.occlusion 1. Closing off or covering of an opening, or obstruction to a hollow part. 2. The relationship of the biting surfaces of the teeth of the upper and lower jaws. 3. The deliberately covering of one eye for periods of weeks or months in the treatment of AMBLYOPIA in children. occlusion blocking off, closing.OcclusionThe way upper and lower teeth fit together during biting and chewing.Mentioned in: Bruxism, Malocclusion, Retinal Artery Occlusion, Retinal Vein Occlusion, Tooth Replacements and Restorationsocclusion The act of blocking or the state of being blocked. Examples: vision with an occluder, a vessel with an embolus.
occlusion amblyopia See amblyopia; occlusion treatment.
o nystagmus See occlusion nystagmus.
punctal occlusion Sealing of the lacrimal punctum, temporarily (e.g. with a plastic plug) or permanently (e.g. by heat cauterization), to preserve the natural tears or prolong the effect of artificial tears. This method is commonly used in the management of keratoconjunctivitis sicca. Occasionally a plug made of collagen is used prior to insertion of a more permanent type of punctal plug, because it dissolves within a week. This is done to determine whether permanent or semi-permanent occlusion (as with a silicone plug) is likely to succeed. See neurotrophic keratopathy.
retinal arterial occlusion See retinal arterial occlusion.
retinal vein occlusion See retinal vein occlusion.
occlusion test See cover test.
occlusion treatment A method of treating amblyopia or strabismus by covering the good eye. Such a method is most effective below the age of four years and with little effect after the age of nine years, that is beyond the critical period of development. However, this technique must be used with caution as prolonged occlusion in very young children can lead to a reversal of eye dominance in which the previously good eye becomes amblyopic (called occlusion amblyopia). Moreover, it has been shown that the effect of occlusion does not improve beyond six hours at a time. Alternate occlusion is preferred as both eyes are thus stimulated. Syn. patching See form-deprivation myopia; penalization; critical period; pleoptics.oc·clu·sion (ŏ-klū'zhŭn) 1. The act of closing or the state of being closed. 2. Any contact between the incising or masticating surfaces of upper and lower teeth. 3. Relationship between occlusal surfaces of maxillary and mandibular teeth when in contact. See OCLN
See OCLNocclusion
Related to occlusion: coronary occlusion, arterial occlusion, Dental occlusionSynonyms for occlusionnoun closure or blockage (as of a blood vessel)Related Words- attack
- laryngospasm
- embolism
- thromboembolism
- thrombosis
- coronary occlusion
noun (meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloftSynonymsRelated Wordsnoun (dentistry) the normal spatial relation of the teeth when the jaws are closedRelated Words- spatial relation
- position
- dental medicine
- dentistry
- odontology
noun an obstruction in a pipe or tubeSynonyms- blockage
- stoppage
- closure
- block
- stop
Related Words- breech closer
- breechblock
- impedimenta
- obstruction
- obstructor
- obstructer
- impediment
- plug
- stopple
- stopper
- vapor lock
- vapour lock
noun the act of blockingSynonymsRelated Words |