Shear Bond Strength of Orthodontic Brackets Bonded to Provisional Crown Materials Utilizing Two Different Adhesives

Author:

Rambhia Sameer1,Heshmati Reza2,Dhuru Virendra3,Iacopino Anthony4

Affiliation:

1. a Assistant Professor, Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wis

2. b Associate Professor, Department of Primary Care, Ohio State University, Columbus, Ohio

3. c Adjunct Associate Professor (Clinical), Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wis

4. d Dean and Professor of Restorative Dentistry, University of Manitoba Faculty of Dentistry, Winnipeg, MB Canada

Abstract

Abstract Objective: To test the hypothesis that there is no difference in the shear bond strength of brackets bonded to provisional crown materials (PCMs) using two adhesive agents. Materials and Methods: Four PCMs were tested: Integrity, Jet, Protemp, and Snap. Forty cylindrical specimens of 10 mm diameter × 5 mm were prepared for each PCM. Ten specimens from each group were bonded to one of the two brackets, Clarity or Victory, using one of the two adhesives, Fuji Ortho LC or Ortho Bracket Adhesive. The brackets were debonded in shear at a cross-head speed of 5 mm/min, and the shear bond strength (SBS) was calculated. The type of failure was visually determined. The numeric data were analyzed using three-way analysis of variance and Tukey multiple range test at α = .05. Results: The mean SBSs ranged from 2.81 MPa to 9.65 MPa. There was a significant difference between Snap and the other three materials (P < .0001). There was no significant difference between the two brackets or the two adhesives (P > .05). The bond failure for all the specimens was of the adhesive type between the PCM and the adhesive resin. Conclusions: The PCM Snap yielded a significantly lower mean SBS value compared to the other three materials. No significant differences were found between the brackets or the adhesives. The bond failure was of the adhesive type.

Publisher

The Angle Orthodontist (EH Angle Education & Research Foundation)

Subject

Orthodontics

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