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. 2021 Aug 24;15(4):733–740. doi: 10.1055/s-0041-1729676

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European Journal of Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 2 — ESTP group: (I) Representative B-scans after 2 weeks (A, B) and 1 month (C, D). Constant application of ESTP for 1 month has markedly increased the surface reflectivity of the dentin as indicated by the solid white triangles in comparison to the same area indicated by hollow triangles. (II) Representative OCT scans and their signals analyses after 2 weeks (a, ậ) and 1 month (b, ḇ’); the vertical broken lines represent A-scan. As seen, an intense backscattered reflection was observed after 1 month (b) in comparison to the light bright band of pixels seen after 2 weeks (A). The presented surface plots (ậ, ḇ’), correspond to the OCT scans in (a) and (b), respectively, showed modifications in the surface density of dentin as indicated by the variation in grayscale peaks. The signal reflectivity at the outer dentin surface after 1 month was greater than 2 weeks (c). D, dentin; ESTP, eggshell toothpaste; OCT, optical coherence tomography.