trepanation

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trephination

 [tref€´€ĭ-na´shun]
use of the trephine for creating an opening in the skull or in the sclera.
dental trephination surgical creation of a fistula by puncturing the soft tissue and bone overlying the root apex to provide drainage. Called also apicostomy.

treph·i·na·tion

(tref'i-nā'shŭn),
Removal of a circular piece ("button") of cranium by a trephine.
Synonym(s): trepanation

treph·i·na·tion

(tref'i-nā'shŭn)
Removal of a circular piece of cranium by a trephine.

trepanation (trephination),

n the act of surgically cutting a round hole.

trepanation, trephination

use of the trephine for creating an opening in the skull or in the sclera.