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Breakthrough gel can regenerate tooth enamel within weeks
(newatlas.com)
This is a most excellent place for technology news and articles.
Not gonna help anyone with broken ones
There's another treatment on the horizon though that grows entirely new teeth. There's an article with a pic of a ferret showing an entirely new tooth that was grown. I think it's a research group in Japan that managed it?
These techs together mean some pretty exciting things coming in a decade or two for shitty teeth when the technologies mature.