90
Participants
Start Date
January 16, 2022
Primary Completion Date
June 30, 2025
Study Completion Date
November 30, 2025
Experimental: Single strand β-Ti fixed retainer
All 90 patients between 13-30 y.o. treated with fixed orthodontic appliances (Roth 0.018'' slot at their final finishing stage) on at least between their lower first premolars and with no lower anterior teeth crowding (total irregularity index score = 0) and no need of removable retention appliances on their lower teeth, were randomly assigned to one of the three experimental groups.
Experimental: SS fixed retainer
All 90 patients between 13-30 y.o. treated with fixed orthodontic appliances (Roth 0.018'' slot at their final finishing stage) on at least between their lower first premolars and with no lower anterior teeth crowding (total irregularity index score = 0) and no need of removable retention appliances on their lower teeth, were randomly assigned to one of the three experimental groups.
Experimental: Twisted fixed retainer
All 90 patients between 13-30 y.o. treated with fixed orthodontic appliances (Roth 0.018'' slot at their final finishing stage) on at least between their lower first premolars and with no lower anterior teeth crowding (total irregularity index score = 0) and no need of removable retention appliances on their lower teeth, were randomly assigned to one of the three experimental groups.
National and Kapodistrian University of Athens, School of Dentistry, Departments of Orthodontics, Athens
University of Athens
OTHER