Treatment Effects and Treatment Time in Adolescents With Crowded and Displaced Teeth Treated With Fixed Appliance Systems Without Extractions: A Multi-Centre Randomised Controlled Trial.

Objectives: To assess and compare treatment effects and treatment time in adolescents with crowded and displaced teeth during and after non-extraction treatments using a passive self-ligating bracket system (PSLB) and a conventional bracket system (CB).

Materials And Methods: Consecutive adolescents (12-17 years old) with crowded and displaced teeth were randomised through computer generated block randomisation in a two-arm parallel-group design, to non-extraction fixed appliance treatment with either PSLB (Damon Q, n = 62) or CB (Victory, n = 70) at four orthodontic clinics. Study models and cephalograms were collected at baseline, post-alignment and post-treatment.

Self-reported pain during different phases of orthodontic treatment with fixed appliance: A multi-centre randomized controlled trial in adolescents with crowding.

Objectives: To compare self-reported pain levels across various treatment phases using passive self-ligating (Damon) and conventional (Victory) standardized fixed appliance systems.

Materials And Methods: Adolescents (12-17 years old) with crowding and displaced teeth, planned for non-extraction treatment, were recruited from four orthodontic clinics. They were randomized into stratified blocks (1:1 ratio) using concealed allocation to receive Damon Q™ (34 boys, 28 girls) or Victory™ (39 boys, 31 girls).