Effect of loading mode on bond strength of orthodontic brackets bonded with 2 systems

Thomas Katona, Robert W. Long

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Introduction: A new orthodontic bracket bonding method or material invariably spawns bond strength studies examining the efficacy of the innovation. The primary purpose of this project was to ascertain whether the mode of in-vitro bracket debonding used in a study affects the measured bond strength. The secondary aim was to compare the bond strengths of 2 different bonding systems. Methods: Flattened stainless steel orthodontic brackets were bonded to flattened bovine enamel with a resin composite bonding agent (Transbond XT, 3M Unitek, Monrovia, Calif). The enamel was prepared with traditional acid etching and priming (37% phosphoric acid gel and Transbond XT Primer, 3M Unitek) or a single-step method (Transbond Plus, 3M Unitek) that combined etching and priming. Cement thickness was kept constant, and bonding was done under controlled temperature and humidity. Brackets were debonded in shear-peel, tension, or torsion. Results: When tested in shear-peel mode, traditional etching and priming produced a stronger bond than the single-step self-etch system. When tested in tension, the traditional bond was weaker than the single-step bond, and when tested in torsion, the bond strengths were similar. Conclusions: Bond strength can vary depending on the method of testing. Claims of clinical efficacy might not be valid.

Original languageEnglish (US)
Pages (from-to)60-64
Number of pages5
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume129
Issue number1
DOIs
StatePublished - Jan 2006

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Orthodontic Brackets
Dental Enamel
Composite Resins
Stainless Steel
Humidity
Gels
Temperature
Acids

ASJC Scopus subject areas

  • Dentistry(all)
  • Surgery

Cite this

Effect of loading mode on bond strength of orthodontic brackets bonded with 2 systems. / Katona, Thomas; Long, Robert W.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 129, No. 1, 01.2006, p. 60-64.

Research output: Contribution to journalArticle

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