Journal of Isfahan Dental School

Comparison of Shear Bond Strength and Adhesive Remnant Index of Metal Brackets Bonded with Ortho-Force, Transbond XT and Resilience Composites

Document Type : مقاله‌های پژوهشی

Authors

1 Postgraduate Student, Department of Orthodontics, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.

2 Assistant Professor, Department of Orthodontics, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.

Abstract

Introduction: In orthodontic treatment a proper bond is essential between the enamel and the bracket. Evaluation of the efficacy of different adhesives for bonding orthodontic brackets to enamel has yielded different results. This study aimed to compare the shear bond strength and adhesive remnant index (ARI) of metal brackets bonded by Transbond XT, Ortho-Force and Resilience composites.
Materials & Methods: Sixty extracted intact upper maxillary first premolars were selected for the purpose of this in vitro study. The teeth were randomly divided into three groups (n = 20). The teeth were bonded with were bonded with Transbond XT, Resilience and Ortho-Force composites in groups 1, 2 and 3, respectively. After 24 hours, shear bond strength test was conducted at a crosshead speed of 0.05 mm/min. ARI scores were evaluated under a stereomicroscope. The results of shear bond strength test were analyzed with ANOVA and Tukey tests. ARI results were analyzed with chi-squared test (α = 0.05).
Results: Shear bond strengths were significantly different between the three groups (p value < 0.001). Transbond XT composite exhibited the highest bond strength (15.26 MP) and Ortho-Force composite had the lowest bond strength (11.96 MP). There were no statistically significant differences in ARI between the three groups (p value = 0.561).
Conclusion: Although the mean shear bond strength of Ortho-Force composite was less than the two other composites, it is still clinically acceptable.
Key words: Composite, Orthodontic bracket, Shear bond strength.

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Journal of Isfahan Dental School
Volume 14, Issue 2 - Serial Number 2
March 2018
Pages 161-168