Background: Orthodontic treatment efficiency depends on appliance design and biomechanics.While self-ligating brackets reduce friction, Synergy brackets incorporate a unique rounded arch slot to minimize resistance.This study compares the rate of maxillary canine retraction using Synergy and self-ligating brackets.Aim: To evaluate the rate of maxillary canine retraction and anchorage loss in Synergy brackets compared to self-ligating brackets using bodily mechanics.Materials and methods: A prospective, randomized, split-mouth clinical trial was conducted on 16 patients requiring first premolar extractions.The left and right quadrants of each maxillary arch were randomly assigned Synergy and self-ligating brackets.Retraction was performed using 0.019 0.025 inch stainless steel wire and NiTi closed-coil springs applying 150 gm force.Measurements were taken at 0, 4, 8, 12, and 16 weeks using digital Vernier calipers.The rate of canine retraction and anchorage loss was statistically analyzed.Results: The Synergy bracket group exhibited a significantly higher retraction rate (1.933 0.645 mm) compared to the self-ligating group (1.337 0.624 mm) (p < 0.05).Anchorage loss was comparable between both groups (Synergy: 0.323 0.272 mm; self-ligating: 0.317 0.205 mm).Conclusion: Synergy brackets demonstrated a significantly higher rate of canine retraction than self-ligating brackets without significant anchorage loss.These findings suggest that Synergy brackets may offer improved efficiency in orthodontic space closure compared to selfligating brackets.Further research with larger sample sizes and long-term follow-ups is recommended.
Kishore et al. (Tue,) studied this question.