trephine

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Related to trephinations: trepanation

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.

tre·phine

(trē-fīn', -fēn'),
1. Synonym(s): perforator
2. To remove a disc of bone or other tissue by means of a trephine.
[contrived fr. L. tres fines, three ends]

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.

trephine

(trĭ-fīn′)
n.
A surgical instrument with a cylindrical saw usually used for removing a disk of bone, especially from the skull, or for removing corneal tissue.
tr.v. tre·phined, tre·phining, tre·phines
To operate on with a trephine.

treph′i·na′tion (trĕf′ə-nā′shən) n.

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.

tre·phine

, trepan (trē-fīn', trĕ-pan')
1. A cylindric or crown saw used for the removal of a disc of bone, especially from the skull, or of other firm tissue as that of the cornea.
2. To remove a disc of bone or other tissue by means of a trephine.
[contrived fr. L. tres fines, three ends]

trephine

A hollow, cylindrical cutting instrument with the edge at one end sharpened or saw-toothed, used to cut a circular hole in bone or other tissue by pressure and rotation.

Trephine

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

tre·phine

, trepan (trē-fīn', trĕ-pan')
1. A cylindric or crown saw used for the removal of a disc of bone, especially from the skull, or of other firm tissue.
2. To remove a disc of bone or other tissue by means of a trephine.
[contrived fr. L. tres fines, three ends]

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.

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.