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David Mooney

A nice, bright smile: Scientists use lasers to regrow teeth

WASHINGTON: Scientists have come up with a bright idea - literally - to repair teeth. And they say their concept - using laser light to entice the body's own stem cells into action - may offer enormous promise beyond just dentistry in the field of regenerative medicine. The researchers used a low-power laser to coax dental stem cells to form dentin, the hard tissue similar to bone that makes up most of a tooth, demonstrating the process in studies involving rats and mice and using human cells in a laboratory. They did not…