Comparison of shear bond strength of orthodontic color change adhesive with traditional adhesive

ABSTRACT

The purpose of this study was to compare the shear bond strength of color-change adhesive with a conventional light-cure adhesive at different debonding times. Materials and Methods: Seventy-two intact extracted human permanent premolar teeth were used in this research. The brackets were bonded with Transbond XT (Group I) and Transbond Plus color change adhesive (Group II). Each of the two adhesive groups were then further divided into three subgroups of 12 specimens each, for a total of six subgroups. The subgroups represented the three different time points to be tested, 15 min, 24 h, and 1 week. Then, the shear bond strength (SBS) of the brackets was tested with a Universal Testing Machine. Adhesive remnant index (ARI) scores were calculated for each debonded teeth. Results: Although Transbond XT yielded the lowest SBS values at 1 week, there was no significant difference between samples regarding shear bond at different times and ARI. Conclusion: The application of these adhesives did not affect bond strength. Both adhesives demonstrated acceptable bond strength to withstand orthodontic forces throughout the experiment.