Surgical act of creating a circular opening.
Hollow rotary circular instrument that removes a disk or cylinder of bone or tissue; it can be used to create a trough around an endodontic post to assist in its removal from a natural tooth or to remove a dental implant from bone.
A small crown saw used in surgery, of the skull.
A surgical instrument for making a round hole in the skull or for removing a round piece of tissue.
A surgical instrument used for cutting a circular hole. The trephine is used to cut through bone, most commonly the skull during brain surgery. Another type of trephine is used to remove a circular section from the cornea, the outer covering of the eye.
A surgical instrument used to remove a circular area of tissue, usually from the comer of the eye or from bone (the latter for microscopical examination). It consists of a hollow tube with a serrated cutting edge.
A compact surgical tool designed to be rotated in order to create a circular incision.
A cylindrical, hollow tool equipped with a serrated edge, utilized for creating a circular aperture, often in bone.
A surgical tool with a saw-like edge designed for cutting out a circular piece of bone or other tissue; used to excise a round section of the skull or a portion of the sclera to reduce high pressure within these areas.