An innovative gel that forms a layer over teeth and then recruits calcium and phosphate ions from saliva to build new enamel has the potential to change dental treatment. To date, we don't have any way to regenerate the tough outer layer of enamel on our teeth as it erodes with age.
Keep in mind this hasn’t been shown to actually help teeth in someone’s mouth.
My guess is that they can slowly regrow lost enamel under fillings, slowly build back up later by layer until a filling is no longer needed. What would be amazing is a cure for gum disease.
Just from that, it seems like its a patch job, not capable of regrowing from zero.
To be fair, the research is on regenerating, not regrowing. I wouldn’t expect regrowing lost teeth to be possible any time soon, unless some kind of bio 3D-printing method became available.
i wouldn’t expect that from a gel
I definitely saw lots of ads on AliExpress for gels that would regrow your teeth before their algorithm realized I wasn’t there for that.