Is It Possible to Rebuild Tooth Enamel?
TL;DR Enamel cannot regenerate once it’s lost, because the cells that build it are gone by the time each tooth erupts. Saliva can re-mineralize enamel that has only started to weaken, but that process reverses once your mouth’s pH drops below about 5.5. A 2025 systematic review of randomized clinical trials found hydroxyapatite toothpaste performs […]
