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Cavities don’t always mean a trip to the dentist for a filling. In their earliest stages, tooth decay can sometimes be reversed through a process called remineralization, which restores minerals to weakened tooth enamel before a permanent hole forms. Brushing twice daily with fluoride toothpaste, flossing regularly, reducing sugary and acidic foods, and supporting saliva production can all help protect and strengthen teeth. The key is recognizing early signs of enamel damage and taking preventive steps before the decay becomes irreversible.
Source
Chen, Haoran et al. “Reversal of root caries using fluoride toothpastes with or without bioactive glass - an in vitro study.” Journal of dentistry vol. 163 (2025): 106139. doi:10.1016/j.jdent.2025.106139
Additional Reading
https://betterreport.com/you-can-reverse-a-cavity/
https://www.webmd.com/oral-health/what-to-know-about-reversing-tooth-decay