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They’re also quite brittle and don’t tolerate lateral forces well, and understandably some surgeons don’t want to use a scalpel that might break off inside the patient’s tissue. Obsidian scalpels are a no-no in America because they don’t have FDA approval. Obsidian, meanwhile, cleaves into a fine and continuous edge when properly cut. He explained that steel scalpels at a microscopic level have a rough cutting edge that tears into tissue, a function of the crystals that make up the metal. “It makes for the best cosmetic outcome.” “The biggest advantage with obsidian is that it is the sharpest edge there is, it causes very little trauma to tissue, it heals faster, and more importantly, it heals with less scarring,” he said. Lee Green, professor and chairman of the Department of Family Medicine at the University of Alberta, says he routinely uses obsidian blades. …you can clearly see that one is sharper than the other.
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