Asadolahi , E.; Saleh , S.; Rezaei , Y.; Hosenzadegan , M.; Behroozian , A.; Sharifi, R. Retention Force Comparison Between Hawley and Vacuum-Formed Retainers in Orthodontic Treatment of Maxillary Arch: A Prospective, Non-Randomized, Cohort Study over 6 Months: Comparing Retention Force of Hawley and Vacuum Formed Retainers. Galen Med J 2024, 13, e3592.