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. 2023 Nov 17;13:20156. doi: 10.1038/s41598-023-47551-5

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© The Author(s) 2023

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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Raman spectroscopy of femtosecond laser processing of dentin at the three tested wavelengths: (a) reference spectrum of dentin with peak attributions from³ (δ: bending; ν: stretching; ω: wagging), (b) spectra for IR (1030 nm) irradiation at various fluences and overlap, (c) for green (515 nm) irradiation at different fluences and 50% overlap, and (d) for UV (343 nm) irradiation at different fluences and overlap. Grey bands indicate the various peak positions for clarity.