A common myth is that whitening “ruins” enamel. Research says otherwise.
Demineralization vs Damage
Demineralization is temporary and naturally reversed through saliva and fluoride.
Peroxide gels do not cause enamel erosion when used properly.
What Studies Show
A 2011 meta-analysis found:
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No significant enamel hardness loss
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Even with 8 hours/day for 21 days
At-home teeth whitening is safe for your enamel. While some whitening gels are acidic, research shows they don't cause lasting damage. The temporary side effects, like sensitivity, go away after you stop.
Whitening can cause minor, temporary effects, but drinks like soda cause far more serious and permanent damage to your enamel because they are much more acidic and you sip them over long periods.
Supporting Enamel Health
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Use fluoride toothpaste
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Stay hydrated
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Avoid brushing immediately after whitening
Next Reads:
→ Whitening Maintenance Schedule
Study Citation:
Demarco FF, Meireles SS, Sarmento HR, Dantas RV, Botero T, Tarquinio SB. Erosion and abrasion on dental structures undergoing at-home bleaching. Clin Cosmet Investig Dent. 2011 Jul 18;3:45-52. doi: 10.2147/CCIDEN.S15943. PMID: 23674914; PMCID: PMC3652357.