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An in vitro evaluation of shear bond strength of chemical and light-cured bonding materials with stainless steel, ceramic, and sapphire brackets | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 23, Issue 2, 2011, Pages 133-138 | ||
| Authors | ||
| Yassir A. Yassir; Ammar S. Kadhum; NoorM.H. Garma | ||
| Abstract | ||
| ABSTRACTBackground: This study was intended to compare shear bond strength of chemical and light-cured bondingmaterials with stainless steel, ceramic, and sapphire brackets, and to measure adhesive remnant index afterdebonding.Materials and method: Sixty non-carious, free of cracks upper first premolar teeth, which have been extracted from18-25 years old Iraqi patients seeking orthodontic treatment were selected. Three types of orthodontic brackets wereused in this study: stainless-steel, ceramic, and sapphire brackets. All bracket types used were of standard edgewisesystem. The teeth were divided into two groups of 30 teeth each. One group was used for testing the chemicallycuredprimer-activated resin of no-mix type, while the other was used for testing of the light-cured resin. Thechemically and light-cured groups were further subdivided according to bracket type into three groups of 10 teetheach. The samples were tested for bond strength using an Instron universal testing machine, while for adhesiveremnant index the enamel surface and bracket base of each tooth were inspected under magnifying lens (20X) of astereomicroscope.Results: The highest shear bond strength values were found in sapphire brackets followed by stainless steel andceramic brackets respectively, both in no-mix and light-cured groups as revealed by ANOVA test. T-test showed thatthe shear strength values were higher for all light-cured groups as compared to no-mix groups.Conclusions: Sapphire brackets have the highest shear bond strength as compared to stainless-steel and ceramicbrackets. Light-cured resin has better bonding properties than no-mix resin.Key words: Shear bond strength, stainless steel, ceramic, sapphire. (J Bagh Coll Dentistry 2011;23(133-138). | ||
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