inside the Stone Age, scalpels with blades made from rock
called obsidian, or volcanic glass, have been used to bore a hole into the
skull. these scientific devices had an extremely sharp cutting edge, and in
recent times an obsidian scalpel continues to be used in a few conditions. but
obsidian equipment are expensive compared with stainless-steel scalpels, and
few producers make them.
Obsidian blades are stated to be as a minimum one hundred
instances sharper than stainless steel surgical scalpels and there is a few
evidence that cuts made with them may heal extra rapidly with less scarring. but
an obsidian blade is also very thin and fragile, and surgeons can not observe
the same amount of pressure to this cutting device as a steel scalpel or it is
able to ruin and shatter its pieces into the wound.
Obsidian blades aren't FDA-authorised for use inside the U.S.,
despite the fact that a small wide variety of surgeons in different countries
use them, frequently for extremely sensitive methods in cosmetically touchy
areas.
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