extrusion

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extrusion

 [ek-stroo´zhun]
1. a pushing out.
2. in dentistry, the condition of a tooth pushed too far forward from the line of occlusion as a result of injury or of lack of opposing occlusal force.

ex·tru·sion

(eks-trū'zhŭn),
1. A thrusting or forcing out of a normal position.
2. The overeruption or migration of a tooth beyond its normal occlusal position.

extrusion

[ek·stro̅o̅′zhən]
Etymology: L, extrudere, to push out
1 thrusting or pushing out; expulsion by force.
2 the overeruption or movement of a tooth beyond its normal occlusal plane in the absence of opposing occlusal force.
3 an orthodontic technique for the elongation or elevation of a tooth. Compare intrusion.

herniated disk

Herniated intervertebral disk, herniated nucleus pulposus, prolapsed intervertebral disk, slipped disk Neurology The herniation of an intervertebral disk, most commonly, lumbar; the term herniation in this context describes a spectrum of disk defects
Herniation disk types, used for MRI exams
Bulge–circumferential symmetric extension of the disk beyond interspace
Protrusion–focal or asymmetric extension of the disk beyond interspace
Extrusion–more extreme extension of the disk beyond interspace Note: Bulges and protrusions on MRI examination are common findings in normal subjects, and appear to be coincidental findings–NEJM 1994; 331:69oa  

ex·tru·sion

(eks-trū'zhŭn)
1. A thrusting or forcing out of a normal position.
2. The overeruption or migration of a tooth beyond its normal occlusal position.

ex·tru·sion

(eks-trū'zhŭn)
1. A thrusting or forcing out of a normal position.
2. The overeruption or migration of a tooth beyond its normal occlusal position.

extrusion

a pushing out; e.g. an orthodontic procedure which makes a tooth emerge further from its alveolus.
References in periodicals archive ?
Independent table-top extruder is a compact, self-contained system with a 1-hp motor and worm gear reducer.
However, all of the flow parameters needed for a rubber extrusion model can be readily obtained using a capillary rheometer, typically a simple die arrangement attached to a common Brabender lab extruder.
Farrel CP (Compact Processor) combines the continuous mixer with a hot-fed extruder to provide a versatile, space-saving system featuring self-cleaning action.
Refeed machines can be mounted on extruder throat including round, square or oblong feedthroats.
American Maplan showed a 75mm, 34:1 sheet extruder using a four-motor direct drive from Knoedler.
Achieving better bimodal polyolefin compounds is the object of Coperion's ZSK-NT (new tandem) twin-screw, which pairs a short (20:1), high-speed (350 to 700 rpm) twin-screw for melting the resin with a long (24:1), slow (80 to 150 rpm) twin extruder for mixing.
The new machine accomplishes continuous extruder operation by means of a positive-displacement gear pump and an additional melt accumulator.
New technologies will be featured in one section that will explain how to make extrudates with variable cross-section and composition along their length, to form curved sections and to control screw speed for individual extruders forming laminate structures.
Davis-Standard is showing the first North American-built extruder with a gearless permanent-magnet torque motor (from Siemens) on its new EMDD (Electric Motor Direct Drive) extruder.
Since the extruder is usually configured for the most difficult to extrude compound, easier to extrude compounds are likely to be over-throttled, so that temperature generation is excessive and throughput for such compounds reduced.
The TEM-41SS and TEM-26SS extrusion systems include the twin screw extruders coupled with AccuRate Mechatron gravimetric feeders, pelletizing systems and other auxiliary equipment.