Evaluation of the Alveolar Bone Changes Following the Upper Anterior Teeth Retraction Using Elastic Chain for Retraction :A 3-D Finite Elements Study. مجلة الجامعة [Internet]. 2022 Oct. 13 [cited 2026 Apr. 26];5(12). Available from: https://hama-univ.edu.sy/ojs/index.php/huj/article/view/887