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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/).
Region of interest (ROI). Images were cropped, as shown in blue box, based on the distal and uppermost points of both permanent canine tooth germs and mandibular anterior alveolar bone level.