Afzal, S., Shah, A. M., Khan, T. A., Afzal, F. and Bano, S. (2017) “Oral hygiene status of orthodontic patients using hyrax expander”, Pakistan Orthodontic Journal, 8(2), pp. 80–84. Available at: https://poj.org.pk/index.php/poj/article/view/142 (Accessed: 21 April 2026).