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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Farlex Partner Medical Dictionary © Farlex 2012

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  
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Medical Dictionary for the Dental Professions © Farlex 2012