Source:
Gel that makes teeth repair themselves could spell the end of fillings https://www.newscientist.com/article/2214797-gel-that-makes-teeth-repair-themselves-could-spell-the-end-of-fillings/#ixzz5yHdosR5I
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additional info from:
Gene Editing Transforms Gel into Shape-Shifting Smart Material
https://www.scientificamerican.com/article/gene-editing-transforms-gel-into-shape-shifting-smart-material/?utm_campaign=Abundance%20Insider&utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-9DBJMarpwiOWgBZS3I1m4_fOzpBSQS9tXU1xrX_wH8fPX9WRe5Nx23YcJUic7RmUEi-RjN