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Effect of Different Surface Treatment With Panaviav5 on Shear Bond Strength of Metal Brackets to Silver Amalgam Publisher



Alavi S1 ; Shirani F2 ; Zarei Z3 ; Raji S4
Authors
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Authors Affiliations
  1. 1. Department of Orthodontics, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Operative Dentistry, Dental Materials Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Orthodontics, Dental Students Research Committee, School of Dentistry, Isfahan University of Medical Science, Isfahan, Iran
  4. 4. Dental Students Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran

Source: Dental Research Journal Published:2021


Abstract

Background: This study was conducted to compare the shear bond strength (SBS) of orthodontic brackets to amalgam surfaces by two surface treatment methods, two different adhesives, and one intermediate resin and also to evaluate surface roughness after two preparation methods as well as bond failure mode. Materials and Methods: In this in-vitro study forty-eight amalgam samples were randomly allocated to four groups. In Groups 1-3, specimens were sandblasted with 50 µm aluminum oxide, followed by application of Alloy primer in Groups 1 and 2. In Group 3 Alloy primer had not used. In Group 4, samples were prepared by silica coating using a silane coupling agent. Surface roughness analysis was performed in 10 additional samples after two surface treatments. The brackets in Group 1 were bonded with Transbond XT and those in other groups were bonded with Panavia V5. All specimens were examined for SBS following 5000 times thermocycling at 5°C-50°C. Modified adhesive remnant index was utilized for the bond failure mode. Data analysis was done by one-way analysis of variance, post hoc Tukey, Kruskal-Walli and Mann-Whitney U tests. Statistical significance was set at P < 0.05. Results: The findings indicated the mean SBS were low (ranged from 0.19 to 4.66 MPa) and significantly lower in Group 3 than in Group 4 (P = 0.009). Bond failure occurred in adhesive/amalgam interface in nearly all samples. Silica coating produced significantly lower roughness than sandblast (P = 0.009). Conclusion: Silica coating had a significant higher bond strength than sandblast without application of Alloy primer. However compared to sandblast with Alloy primer, silica coating did not significantly improve the bond strength. Chemical bond between PanaviaV5 and sandblasted amalgam was not considerable. © 2021 Wolters Kluwer Medknow Publications. All rights reserved.
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