The objective of this study is to compare the canine retraction rate (in mm with a 100 mm marked scale) using Ni-Ti closed-coil springs versus elastomeric power chains during canine retraction in subjects with first premolar extractions over a period of three months.
After the extraction of all first premolars under local anesthesia. For canine retraction, Ni-Ti closed-coil springs and elastomeric power chains will be randomly allocated to the right and left quadrants of both arches.
Radiographic measurement (root resorption) and clinical measurements (canine retraction, plaque accumulation and gingival health) will be recorded at four points in time. First, at the start of the canine retraction (T0), after first month (T1), second month (T2) and third month follow-up (T3).
Patients aged between 13 - 40 years
Patients undergoing fixed orthodontic treatment
Patients requiring all first premolars extraction as part of orthodontic treatment
Patients with all permanent teeth present and erupted (except for second and third molars)
• Patients with systemic diseases that can affect tooth movements
Patients with uncontrolled periodontal disease
Patients with craniofacial syndromes
Pregnant or lactating mothers
Munnal Gulzar
Lead sponsor
Aga Khan University Hospital, Pakistan
Sponsor institution