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Year : 2017  |  Volume : 7  |  Issue : 6  |  Page : 273-278

Comparison of shear bond strength of four types of orthodontic brackets with different base technologies

Department of Developmental Dentistry/Orthodontics, School of Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA

Correspondence Address:
Gianina Salton Mattevi
University of Texas Health Science Center at San Antonio, 8210 Floyd Curl Drive, San Antonio, TX 78229
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/apos.apos_91_17

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Objectives: The aim of this study was to compare the shear bond strength (SBS) of brackets systems with four different base technologies. Materials and Methods: Maxillary first premolars were randomly divided into four groups of thirty specimens each: (1) Master Series™ conventional twin, (2) T3™ self-ligating, (3) Victory series™ conventional twin, and (4) H4™ self-ligating brackets. Maxillary first premolars were bracketed using an acid-etch composite system, and the SBS measured using an Instron Universal Testing Machine at a crosshead speed of 2 mm/min. The ANOVA and Tukey's multiple comparison tests were performed with significance predetermined at P ≤ 0.05. Results: The overall mean bond strengths were 8.49 ± 2.93, 10.85 ± 3.34, 9.42 ± 2.97, and 9.73 ± 2.62 for the Groups 1, 2, 3, and 4 brackets, respectively. One-way ANOVA test gave an F = 3.182 with a P = 0.026. The Group 1 and Group 2 were observed to have statistically significant difference with a P = 0.014. Conclusions: The T3 self-ligating one-piece design with microetched Quadra Grip™ base brackets had the highest bond strength. The SBS difference between Group 2, Group 3, and Group 4 was not significant, but the difference between Group 2 and Group 1 was statistically significant.

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