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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/).
The shape of the crowns used in this study: (a) CAD/CAM designs of 3D printed resin crowns according to thickness and (b) prepared 3D printed resin crowns and prefabricated zirconia crown.