Sana Akram, Muhammad Zeeshan, Mariyam Masood, Daud Anthoney, Nadia Irshad, Mahrukh Anwar. “The Impact of Orthodontic Fixed Appliance and Clear Plastic Aligner in Periodontal Health; A Comparative Clinical Study”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 04, May 2022, p. 305, doi:10.53350/pjmhs22164305.