title: A clinical comparison of bracket bond failures in association with direct and indirect bonding.
abstract: OBJECTIVE
  To compare bond failure rates between direct and indirect techniques for bonding orthodontic brackets.
  
  
  METHODS
  A two-centre single blinded prospective randomized controlled clinical trial.
  
  
  METHODS
  This study was undertaken at the Birmingham Dental Hospital and Good Hope Hospital, Sutton Coldfield. Thirty-three subjects meeting the inclusion criteria were selected from orthodontic waiting lists and assigned to either of two study groups according to a split-mouth study design. The number and site of bracket failures between tooth types was recorded over 1 year. Statistical analysis was carried out using chi-square tests.
  
  
  RESULTS
  Brackets were lost from 14 of the 553 teeth bonded, giving an overall bond failure rate of 2.5%. There were no significant differences in bond failures between direct and indirect bonding or in the tooth types of the failures.
  
  
  CONCLUSIONS
  There was no significant difference in the bond failure rates between direct and indirect bonding.
authors.affiliation: Department of Orthodontics, School of Dentistry, Birmingham, UK.
authors.forename: S
authors.initials: S
authors.lastname: Thiyagarajah
authors.forename: D J
authors.initials: DJ
authors.lastname: Spary
authors.forename: W P
authors.initials: WP
authors.lastname: Rock
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D001641:Bicuspid; D002648:Child; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry; D004868:Equipment Failure; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor; D008334:Mandible; D008437:Maxilla; D016910:Orthodontic Brackets; D010756:Phosphoric Acids / Q000737:chemistry; D011446:Prospective Studies; D019279:Resin Cements / Q000737:chemistry; D016037:Single-Blind Method
chemical_list: D003738:Dental Cements; D010756:Phosphoric Acids; D019279:Resin Cements; C477790:Transbond XT; C030242:phosphoric acid