Shear bond strength of orthodontic bracket bonded to buccal versus lingual surfaces
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2018, Vol 17, Issue 1
Abstract
Objectives: The objective of this investigation was to assess shear bond strength (SBS) of orthodontic brackets bonded to the buccal and lingual enamel using two orthodontic adhesives: resin-modified glass-ionomer and resin composite. Methods: Twenty buccal and twenty lingual human premolar enamel surfaces, allocated into four groups 10/each were used in this study. Metal brackets were bonded to each surface using resin-modified glass-ionomer or resin composite orthodontic adhesive, and excess was removed with a brush. Specimens were stored for 24 hours, subjected to thermocycling and shear bond strength was measured using a universal testing machine at a crosshead speed of 1 mm/min. Remaining adhesives on enamel after bracket debonding was scored independently by two investigators who were not aware of the groups using modified adhesive remnant index (ARI). Results: Kruskal Wallis test indicated significant difference of shear bond strength between the four groups (P=0.007). Pair-wise comparisons using Mann-Whitney test showed that the only significant difference was between resin composite of buccal and resin-modified glass-ionomer of lingual surfaces (P=0.003) as well as between resin composite of lingual and resin-modified glass-ionomer of lingual surfaces (P=0.001). Most of the specimens of all groups, achieved ARI scores 4 and 5 with a very low frequency of ARI scores 2 and 3. Conclusions: This research shows that no significant differences in shear bond strength between buccal and lingual surfaces. Resin-modified glass-ionomer and resin composite adhesives exhibited sufficient shear bond strength for orthodontic use and no significant difference was found between the two adhesives.
Authors and Affiliations
Fouad Salama, Malak Aldosari, Hessa Alrejae, Naif Almosa
Keywords
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- EP ID EP263811
- DOI 10.9790/0853-1701062429
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