n. (in dentistry) 1. the forced eruption of a tooth either by means of an orthodontic appliance or surgically; for example, to realign a tooth that has failed to erupt or has been accidentally forced into the jaw. 2. the partial displacement of a tooth from its socket as a result of traumatic injury.
Extrusion of the abdominal VISCERA or internal organs, usually as the result of serious injury. (Usually described as disembowelment when deliberately carried out by one person on another.) In surgery the term refers to part-removal of the viscera, and in OPHTHALMOLOGY it is an operation to remove the contents of the eyeball (see also EYE).... evisceration
the flexible plate of fibrocartilage that connects any two adjacent vertebrae in the backbone. At birth the central part of the disc – the nucleus pulposus – consists of a gelatinous substance, which gradually becomes replaced by cartilage with age. The intervertebral discs account for one quarter of the total length of the backbone; they act as shock absorbers, protecting the brain and spinal cord from the impact produced by running and other movements. A tear in the outer fibrous portion of the disc results in displacement of the nucleus pulposus to varying degrees: protrusion, prolapse (see prolapsed intervertebral disc), extrusion, or sequestration.... intervertebral disc
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