title: Maxillary canine retraction with self-ligating and conventional brackets.
abstract: OBJECTIVE
  To measure space closure during the retraction of upper permanent canines with self-ligating and conventional brackets.
  
  
  METHODS
  Fifteen patients who required maxillary canine retraction into first premolar extraction sites as part of their orthodontic treatment completed this study. In a random split-mouth design, the retraction of upper canines was performed using an elastomeric chain with 150 g of force. The evaluations were performed in dental casts (T0, initial; T1, 4 weeks; T2, 8 weeks; T3, 12 weeks). The amount of movement and the rotation of the canines as well as anchorage loss of the upper first molars were evaluated.
  
  
  RESULTS
  There was no difference between self-ligating and conventional brackets regarding the distal movement of upper canines and mesial movement of first molars (P > .05). Rotation of the upper canines was minimized with self-ligating brackets (P < .05).
  
  
  CONCLUSIONS
  Distal movement of the upper canines and anchorage loss of the first molars were similar with both conventional and self-ligating brackets. Rotation of the upper canines during sliding mechanics was minimized with self-ligating brackets.
authors.affiliation: Department of Orthodontics, Centro Universitário Franciscano, Santa Maria–RS, Brazil. mezomo@ortodontista.com.br
authors.forename: Maurício
authors.initials: M
authors.lastname: Mezomo
authors.forename: Eduardo S
authors.initials: ES
authors.lastname: de Lima
authors.forename: Luciane Macedo
authors.initials: LM
authors.lastname: de Menezes
authors.forename: André
authors.initials: A
authors.lastname: Weissheimer
authors.forename: Susiane
authors.initials: S
authors.lastname: Allgayer
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003481:Cuspid / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla; D008963:Molar / Q000502:physiology; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D019516:Orthodontic Space Closure / Q000295:instrumentation*; D018709:Statistics, Nonparametric; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D055815:Young Adult