A dentist extracts a tooth from a patient at a dental clinic in Sabanilla near San Jose in this November 1, 2012 file photo. Scientists have come up with a bright idea - literally - to repair teeth. ... more 
A dentist extracts a tooth from a patient at a dental clinic in Sabanilla near San Jose in this November 1, 2012 file photo. 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. To match story SCIENCE-TEETH/ REUTERS/Juan Carlos Ulate/Files (COSTA RICA - Tags: HEALTH SCIENCE TECHNOLOGY) less 
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Reuters | Photo By JUAN CARLOS ULATE / REUTERS
Fri, May 30, 2014 4:43 PM EDT