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. 2021 Mar 26;14(7):1614. doi: 10.3390/ma14071614

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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 (http://creativecommons.org/licenses/by/4.0/).

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(a) Visual image of 2-mm thick composite resin specimens placed over a black letters line. (b) Translucency parameter mean values (TP) of experimental composite resins. The same lower letters indicated that there is no significant difference in TP between experimental composite resins with different weight fractions of HE-Phene in the resin matrix. The same upper letters indicated that there is no significant difference in TP between experimental composite resins with different weight fractions of TE-Phene in the resin matrix.