A Comparison Between Van Beek Headgear Activator And Andresen Activator In Orthodontic Treatment Of Class Ⅱ Division 1 Cases: A Randomized Clinical Trial. Int. J. Environ. Sci. [Internet]. 2025 Sep. 8 [cited 2026 Aug. 5];:2597-606. Available from: https://theaspd.com/index.php/ijes/article/view/12216