Fahad H Alqahtani
New York University, USA
Title: Comparison of shear bond strength and the adhesive remnant index of orthodontic metal brackets bonded with transbond XT and Bracepaste in- vitro
Biography
Biography: Fahad H Alqahtani
Abstract
Objectives: The aim of this in-vitro study was to compare the shear bond strength (SBS) and to evaluate the adhesive remnant index (ARI) of stainless-steel orthodontic brackets bonded with two different orthodontic adhesives (Transbond XT and Bracepaste); decalcification at the base of the brackets were also recorded.
Materials and Methods: A total of 16 surfaces (buccal and lingual) of 8 extracted human molars were randomly divided into two groups. The shear bond strength was performed by using the Universal Testing Machine (Instron 5566 Test Bench) and the results were recorded in megapascals (MPa). The Adhesive Remnant Index (ARI) scores were determined with the LEICA MZ APO stereomicroscope. Additionally, the element analysis for the base of orthodontic brackets was done by using the scanning electron microscope (SEM) to detect the decalcification.
Results: The mean SBSs of Bracepaste (20.67 ± 5.76) and Transbond XT (22.29 ± 5.02) showed a clinically acceptable SBS values and there was no statistically significant difference according to one-way analysis of variance. As well as the ARI scores were not statistically significant difference in both groups based on Chi-square test. The SEM-EDS of elements analysis showed that Calcium and Phosphate were detected when the debonding take place at the enamel-adhesive interface.
Conclusion: There was no statistically significant difference between Transbond XT and Bracepaste, and it was concluded that both types have a sufficient bond strength to be used for bonding the orthodontic brackets.