Shear-peel bond strength of orthodontic primers in wet conditions

K. S. Kula, T. D. Nash, J. H. Purk

Research output: Contribution to journalArticle

9 Scopus citations


Objective: The purpose of this in vitro study was to determine whether a hydrophilic primer (TransbondTM MIP, [MIP]) produces a significant difference in shear/peel bond strength compared with a traditional hydrophobic primer (TransbondTM XT, [XT]) in wet (W) or dry (D) conditions and if there is a difference in the site of bond failure. Design: A randomized blinded in vitro design. Setting and Sample Population: The University of Missouri-Kansas City School of Dentistry. Forty extracted human premolars were divided into four test groups (n = 10 each): MIP-dry conditions (MIPD), MIP-wet conditions (MIPW), XT-dry (XTD) and XT-wet (XTW). Experimental Variable: Orthodontic brackets were bonded to the teeth according to the manufacturer's directions except XTW and MIPW were exposed to moisture. Outcome Measure: Shear/peel test 24 h after bonding using an Instron at a crosshead speed of 0.5 mm/min and the adhesive remnant index to determine the site of bond failure. Results - The bond strengths (X ± SD) in MPa were XTD = 8.3 ± 2.3; XTW = 0.8 ± 0.7; MIPD = 7.5 ± 1.8 and MIPW = 7.9 ± 1.7. The shear/peel bond strengths were significantly different: XTD = MIPD = MIPW > XTW (p ≤ 0.01; two-way ANOVA; Tukey HSD). The ARI scores were also significantly different: XTD = MIPD = MIPW > XTW (p ≤ 0.01; Chi-square). Conclusions: Orthodontists who suspect moisture contamination should use a hydrophilic primer during bonding procedures to maintain shear/peel bond strength.

Original languageEnglish (US)
Pages (from-to)96-100
Number of pages5
JournalOrthodontics and Craniofacial Research
Issue number2
StatePublished - Dec 1 2003


  • Adhesives
  • Bond strength
  • Composite
  • Moisture insensitive primer
  • Orthodontics

ASJC Scopus subject areas

  • Orthodontics
  • Surgery
  • Oral Surgery
  • Otorhinolaryngology

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