The perception of tooth whitening practices during and after orthodontic treatment: A survey of orthodontists.

J Clin Exp Dent · 2021 · PMC8223160 · PMID 34188757

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an increasing trendno p-value reported

We found that 99,2% of the surveyed orthodontist have had requests for tooth whitening from their patients and this suggest an increasing trend ( 9 ).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.