Clinical bond failure of pre-coated and operatorcoated orthodontic brackets

Katherine Kula, Rebecca Schreiner, Justin Brown, Alan Glaros

Research output: Contribution to journalArticle

22 Scopus citations


Objectives: To test the hypothesis that there is no significant difference in clinical bracket failure between the 3M APC Mini Twin™ bracket system and the Transbond XT™ adhesive during orthodontic treatment. Design: A randomized, split mouth, prospective clinical trial. Setting and Sample Population: The Department of Orthodontics and Dentofacial Orthopedics at University of Missouri, Kansas City. Twenty-nine subjects who were treatment planned to receive comprehensive orthodontics using 0.018 slot appliances. Experimental Variable: The adhesive pre-coated brackets (APC) system was randomly assigned to one side of the mouth and the Transbond XT™ was assigned to the opposite side. Outcome Measure: The absence of any of the brackets at the time of a regular or emergency orthodontic appointment. Results: There was no significant difference (P > 0.05) in bracket failure between the 3M APC Mini TwinTM bracket system and the Transbond XT™ adhesive at any time period (90, 180, or 365 days). The failure rate of brackets on premolars was higher than on incisors or canines. Conclusion: APC Mini Twin™ bracket system and Transbond XT™ adhesive are equally effective in maintaining brackets clinically. Inexperienced operators had an overall 7.5% bond failure 12 months following bracket placement.

Original languageEnglish (US)
Pages (from-to)161-165
Number of pages5
JournalOrthodontics and Craniofacial Research
Issue number3
StatePublished - Dec 1 2002



  • Bond failure
  • Composite resin
  • Orthodontic adhesives

ASJC Scopus subject areas

  • Orthodontics
  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

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