Bleaching and desensitizer application effects on shear bond strengths of orthodontic brackets

Hakan Türkkahraman, Necdet Adanir, A. Yalcin Güngör

Research output: Contribution to journalArticle

28 Scopus citations


Objective: To evaluate the effects of bleaching and desensitizer application on shear bond strengths of orthodontic brackets. Materials and Methods: Forty-eight extracted human premolar teeth were randomly assigned to 4 groups of 12 each. The first group of teeth was bleached with a 35% hydrogen peroxide office bleaching agent. The second group was bleached the same as the first group and UltraEZ desensitizer was applied. No bleaching procedures were applied on the third and fourth groups. UltraEZ desensitizer alone was applied to teeth in the third group. The fourth group served as control. Orthodontic brackets were bonded with a LC (light cure) composite resin and cured with a halogen light. After bonding, the shear bond strengths of the brackets were tested with a Universal testing machine. Results: The results showed that bleaching, bleaching plus desensitizer, and desensitizer procedures significantly reduced the bonding strengths of the orthodontic brackets (P < .05, P < .001, and P < .01, respectively). No statistically significant difference was found between bleaching, bleaching plus desensitizer, and desensitizer groups (P > .05). Conclusions: Because bleaching and desensitizer application significantly affected shear bond strengths of orthodontic brackets on human enamel, they should be delayed until the completion of orthodontic treatment.

Original languageEnglish (US)
Pages (from-to)489-493
Number of pages5
JournalAngle Orthodontist
Issue number3
StatePublished - May 1 2007



  • Bleaching
  • Carbamide peroxide
  • Desensitizer
  • Hydrogen peroxide
  • Potassium nitrate
  • Shear bond strength

ASJC Scopus subject areas

  • Orthodontics

Cite this