Can brackets be bonded with a composite resin after expiration date?

Ahmet Yalçin Güngör, Huseyin Alkis, Hakan Turkkahraman

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Introduction: The aim of the study was to compare shear bond strengths of brackets bonded with a composite resin before and after expiration dates. Methods: Forty-five freshly extracted premolar teeth were randomly divided into 3 groups of 15. Ormco Mini 2000 (Ormco Corp, Glendora, Calif) bicuspid metal brackets were used in the study. Group I: the brackets were bonded with Blugloo (Ormco Corp, Glendora, Calif) adhesive paste before the expiration date. Groups II and III: the brackets were bonded with same light cure composite resin 1 and 2 years after the expiration date. All of the groups were cured with a LED light. After bonding, the shear bond strengths of the brackets were tested with a universal testing machine. One-way ANOVA with post-hoc Tukey tests were used to compare shear bond strengths of the groups. The chi-square test was used to determine significant differences in the adhesive remnant index (ARI) scores between the groups. Significance for all statistical tests was predetermined at p<0.05. Results: No statistically significant difference was found in shear bond strengths and ARI scores between three groups (p<0.05). There was a greater frequency of ARI scores of 2 and 3 and 4 in all groups. Conclusions: Expiration dates do not have a significant effect on the shear bond strength of the composite material. Further studies are needed to investigate in other ways such as cytotoxicity of the composite resins after expiration date.

Original languageEnglish (US)
Pages (from-to)84-86
Number of pages3
JournalInternational Journal of Artificial Organs
Issue number2
StatePublished - Feb 2016


  • Brackets
  • Expiration date
  • Shear bond strengths

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

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