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. 2021 Jul 30;84(4):207–215. doi: 10.1007/s00056-021-00341-y

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Representative sample of bracket group C (ceramic) after demineralization. The left side of the samples was exposed to the demineralized solution. The white dashed line shows the position of the bracket. a Standard visible image, b corresponding grey bioluminescence image, c corresponding colored bioluminescence image, d corresponding quantitative light-induced fluorescence (QLF) image

Repräsentative Probe der Bracketgruppe C (Keramik) nach der Demineralisierung. Die linke Seite der Proben wurde demineralisiert. Die weiße gestrichelte Linie zeigt die Position des Brackets. a Sichtbares Standardbild, b korrespondierendes graues Biolumineszenzbild, c korrespondierendes gefärbtes Biolumineszenzbild, d korrespondierende QLF(quantitative lichtinduzierte Fluoreszenz)-Aufnahmen