International Journal of Medical Research & Health Sciences (IJMRHS)
ISSN: 2319-5886 Indexed in: ESCI (Thomson Reuters)

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Shear Bond Strength and Excess Adhesive Surface Topography of Different Bonding Systems after Thermocycling: A Comparative In-vitro Study

Author(s):Sarah Dheyaa Abd and Mustafa M. Al-Khatieeb

Background: To evaluate shear bond strength (SBS) and surface topography of excess adhesive of the recently introduced APCTM Flash-Free (FF) bracket-bonding system. Material and Methods: Sixty extracted human upper first premolars were randomly divided into five groups (12 per group), and used for this in vitro study: group 1, APCTM Flash-Free adhesive coated appliance system; group 2, APCTM Plus adhesive coated appliance system; group 3, APCTM II adhesive coated appliance system; group 4, manual application of adhesive bracket bonding system (Conven. 1) (with the use of TransbondTM XT Primer); group 5, manual application of adhesive bracket bonding system (Conven. 2) (with the use of TransbondTM Plus Self Etching Primer). Bond strength was measured using an Instron machine at a cross-head speed of 1 mm/min. The excess adhesive was evaluated with stereomicroscopic. Results: There were highly significant differences among all groups using ANOVA F-test; furthermore, there were no significant differences in (SBS) between APCTM Flash-Free group and the remaining groups, except with APCTM II group, and the mean shear bond strength were 12.633, 13.578, 15.080, 13.852, and 11.143 MPa respectively. The adhesive excess, which was metrically measured from the bracket edge, ranged from 206.245 μm to 75.488 μm APCTM Flash-Free group, 530.258 μm to 155.750 μm APCTM Plus group, 522.329 μm to 188.681 μm APCTM II group, 519.562 μm to 157.151 μm manual application Conven.1 group, and 508.449 μm to 162.208 μm manual application Conven.2 group, so there were high significant difference between APCTM Flash-Free group and the remaining groups. Conclusions: With the use of APCTM Flash-Free adhesive bracket system there was no need to clean up excess adhesive, which simplifies the bracket-positioning process and facilitate a smooth and sufficient marginal surface of the adhesive, which clinically might improve reduction of plaque accumulation, with an optimum shear bond strength value for clinical routine use.

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