Influence of Time Intervals between Bleaching Procedures on Enamel Microhardness and Surface Roughness.

Open Dent J · 2018 · PMC6110064 · PMID 30197694

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an increasing trendno p-value reported

made three bleaching applications and revealed an increasing trend in the SR when 10% carbamide peroxide, 35% carbamide peroxide, 3.6% hydrogen peroxide, and 10% hydrogen peroxide were used, showing that the time interval may influence SR, even when low-concentration peroxide gels were applied to the enamel surface [ 18 ].

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