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A handheld 3-D printer lets surgeons draw new cells

from Fast Company

A handheld surgical "pen" that works a little like a mini-3-D printer may soon be used to help repair damaged bones. Surgeons could use the BioPen, developed by Australian researchers, to draw layers of stem cells directly at the site of an injury. After filling the damaged bone with the cells — mixed with a biodegradable seaweed extract to hold everything together — an ultraviolet light on the pen sets the gel in place. more

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