YASSAEI, Soghra; NASR, Nazanin; MAHDIAN, Fatemeh; ZAMANI, Saba. Changes in the Age of Orthodontic Treatment Onset Before and During the COVID-19 Pandemic in Iranian Patients: A Retrospective Cross-Sectional Study: COVID-19 Pandemic and Changes of Orthodontic Treatment Onset. Regeneration, Reconstruction & Restoration (Triple R), [S. l.], v. 10, 2025. DOI: 10.22037/rrr.v10.50448. Disponível em: https://journals.sbmu.ac.ir/tripleR/article/view/50448. Acesso em: 7 jul. 2026.