Assessment of Oxygen Expansion during Internal Bleaching with Enamel and Dentin: A Comparative In Vitro Study.

Dent J (Basel) · 2021 · PMC8471379 · PMID 34562972

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failed to reach statistical significanceno p-value reported

Although expansion was seen to increase on adding enamel or dentin, the difference over time failed to reach statistical significance.

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a decreasing trendno p-value reported

The amount of expansion was decreasing over time, for all of the whitening groups, showing a decreasing trend with the days. 4.

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