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Dr. Praveen AranyNBC News reported on July 1, 2014 that Doctor Praveen Arany, working with a team of researchers at the Harvard Wyss Institute,  has found a way to coax stem cells into the production of dentin, a material that forms the backbone of teeth.  Watch this short video to see how it all works.
FOX News also published an article on May 28, 2014, saying there may be no more need for root canals due to this technology.