Trepanation

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Trepanation

 

(also trephination), in medicine, the surgical section of the medullary cavity of a bone. The operation is performed with special instruments, including a trephine (or crown saw), forceps, and gouges. In former usage, “trepanation” referred only to the surgical opening of the cranial cavity to remove a brain tumor or hematoma, for example, or to apply a ligature to an injured vessel. In modern medical practice, trepanation is also performed on the tubular bones in cases of osteomyelitis, and on the mastoid in mastoiditis. Dental trepanation is the surgical formation of an opening through the gum and bone of a tooth. Corneal trepanation is the surgical cutting of the sclera. Trepanation is also used for the withdrawal of bone marrow for examination, as in sternal biopsy.

References in periodicals archive ?
With this approach you reduce the costs of other stages or trepanning heads while improving the speed/precision ratio.
Compared with drilling, trepanning is easily just as fast an operation, and usually faster.
With the trepanning module, developed at blz and extensively tested at LLT, it is possible to achieve highly accurate circular bore holes with high aspect ratios and adjustable flank angle.
They include an 18-inch amputation saw used to remove badly injured and infected limbs, plus a fearsome trepanning drill for making holes in skulls in major operations - which was thought to release pressure from the brain.
Although, given the video was a showreel of Raquel Welsh's sexiest moments, I would have kept watching had Barrack Obama been trepanning on stage.
A fierce people who live in the northern regions and are known to perform an operation called trepanning, which involves making a hole in the skull.
Like many other metalworking industries, hole making in general, including boring, drilling, and trepanning suffer in the modern industrial world from an almost ridiculous image problem.
A flint tool was probably used to cut the hole in a technique known as trepanning, one of the oldest forms of surgical operation, which attempted to alleviate headaches by releasing pressure or evil spirits from the brain.
Yes, trepanning - the practice of making holes in people's heads.
Ms Perry went to the US to carry out the ancient technique of trepanning, which is illegal in the UK.