trephine (redirected from trephinations)

trephine /tre·phine/ (trah-fīn´) (trah-fēn´)

1. a crown saw for removing a disk of bone, chiefly from the skull.

2. an instrument for removing a circular area of cornea.

3. to remove with a trephine.

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tre·phine (tr-fn)

n.

A cylindrical or crown saw for the removal of a disk of bone, especially from the skull, or removal of other firm tissue such as that of the cornea.

v.

To operate on with a trephine.

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Trephine

A small surgical instrument that is rotated to cut a circular incision.

Mentioned in: Corneal Transplantation

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trephine

[trifīn′, trifēn′]

Etymology: Gk, trypan, to bore

a circular sawlike instrument used in removing pieces of bone or tissue, usually from the skull. Also called trepan.

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trephine [trĕ-f€īn´, trĕ-fēn´]

1. a saw for removing a disk of bone, chiefly from the skull.

Trephine. From Dorland's, 2000.

2. an instrument for removing a circular area of cornea.

3. to remove with this instrument.

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trephine (trefēn´),

n a circle-cutting surgical instrument designed to remove a circumscribed portion of tissue. It permits the insertion of the heads of intramucosal inserts into the tissue.

Treponema

n a genus of schizomycetes composed of parasitic and pathogenic spiral microorganisms.

Treponema microdentium,

n a species found in the normal oral cavity.

Treponema mucosum,

n a species found in periodontal infections in man.

Treponema pallidum,

n the spirochete that causes syphilis in humans.

Treponema vincentii,

n a spirochete associated with acute necrotizing ulcerative gingivitis.

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trephine

1. a crown saw for removing a circular disk of bone, chiefly from the skull. See also galt trephine, michel's trephine, searcy trephine.

2. an instrument for removing a circular area of cornea, e.g. Castroviejo trephine.

3. to remove with a trephine.