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. 2019 Aug 21;10:919. doi: 10.3389/fphys.2019.00919

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Copyright © 2019 Lilaj, Dauti, Agis, Schmid-Schwap, Franz, Kanz, Moritz, Schedle and Cvikl.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Results of the bleached index (BI) before and 21 days after bleaching procedure. (A) Overview of the results of the used home-bleaching products containing up to 6% hydrogen peroxide (HP) (Opalescence^® PF 10%, OP 10CP; Philips ZOOM^®! NiteWhite^® 16%, PNW 16CP; and Philips ZOOM^®! DayWhite^® 6%, PDW 6HP). (B) Results of in-office bleaching products containing up to 6% HP (Philips ZOOM^®! 6%, PZ 6HP; Magic White^® 0%, MW 0HP and Smartbleach^® 6%, SB 6HP). (C) Results of in-office bleaching products containing more than 6% HP (Philips ZOOM^®! 25%, PZ 25HP; Opalescence^® Boost 40%, OP 40HP and Philips Dash 30%, PD 30HP). Statistical significance highlighted by ^∗∗p < 0.001.