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Canine retraction and anchorage loss: self-ligating versus conventional brackets in a randomized split-mouth study
André da Costa Monini1, Luiz Gonzaga Gandini Júnior, Renato Parsekian Martins
1a PhD student, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, UNESP, Araraquara, SP, Brazil.
The Angle Orthodontist
|March 6, 2014
Summary
Self-ligating and conventional brackets showed similar canine retraction velocity and molar anchorage loss in Class I malocclusion. Inclination changes for canines and molars were also comparable between the two bracket types.
Area of Science:
- Orthodontics
- Biomaterials
Background:
- Orthodontic treatment aims to correct malocclusions efficiently.
- Self-ligating brackets are proposed to offer advantages over conventional brackets.
- Comparative studies are essential to validate these claims.
Purpose of the Study:
- To compare the efficacy of self-ligating versus conventional brackets.
- To evaluate canine retraction velocity and molar anchorage.
- To assess changes in canine and molar inclinations during retraction.
Main Methods:
- A randomized split-mouth trial was conducted on 25 adults with Class I malocclusion requiring premolar extractions.
- Maxillary canines were randomly assigned conventional or self-ligating brackets.
- Nickel-titanium closed coil springs (100g) were used for retraction, with reactivation every 4 weeks.
- Oblique cephalometric radiographs were analyzed for horizontal changes and angulations.
Main Results:
- No statistically significant differences were observed between self-ligating and conventional brackets.
- Canine retraction velocity was comparable in both groups.
- Molar anteroposterior anchorage loss and inclination changes were similar for both bracket types.
Conclusions:
- Both self-ligating and conventional brackets provide similar outcomes for canine retraction and molar anchorage.
- Neither bracket type demonstrated an advantage in controlling canine and molar inclinations.
- Clinical decisions can be based on factors other than bracket type for these specific outcomes.
