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. 2021 Jul 30;9(8):83. doi: 10.3390/dj9080083

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The topography changes of the bulk-fill (BF) composites cured in different conditions. (A) The mean and standard deviation of ΔRa values considering the underperformed light curing conditions and the two-radiance emittance output (mean ± sd; n = 6). Capital letters compare LCU₆₀₀, while lower case letters compare LCU₁₀₀₀. Dissimilar letters are significantly different from each other (p < 0.05). (B–E) Representative SEM images of the BF composite surface under control and moderate angulation following the output of 1000 mW/cm² (B,C) and LCU600 (D,E).