The Effect of Desensitizing Agent on Shear Bond Strength to Dentin using Three Self-etching Bonding Systems at Different Time Intervals. An In Vitro Study

Ashraf S. Al-Chalabi; Rajaa Taher; Makdad Chakmakchi

doi:10.3889/oamjms.2022.9542

Authors

Ashraf S. Al-Chalabi Department of Conservative Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq https://orcid.org/0000-0001-6020-1734
Rajaa Taher Department of Conservative Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq https://orcid.org/0000-0001-6020-1734
Makdad Chakmakchi Department of Conservative Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq

DOI:

https://doi.org/10.3889/oamjms.2022.9542

Keywords:

Desensitizing agent, Quadrant FiniSense, G-Premio bonding, Shear bond strength, i bond, Clearfil S3 bound plus

Abstract

Objectives: To investigate the shear bond strength of dentin surfaces using different self-etching bonding systems after treating with a desensitizing agent at different time intervals.

Materials and methods: 63 sound upper premolars were used, the ‎occlusal aspect was sectioned at the middle in a ‎vertical direction into buccal and ‎palatal halves. Each ‎specimen was mounted and a flat dentin surface was ‎prepared at the middle third of each specimen. The sectioned samples were divided into 3 groups according to the bonding agent n=42. One-half of each tooth was treated with desensitizing agent Quadrant FiniSense then both halves were bonded with one of the three self-etching bonding systems (G-Premio bonding‎, i Bond, Clearfil S3 bound plus). ‎After adhesive procedures, a composite resin was applied against the tooth to form ‎a cylinder ‎(2mm×4mm) and cured. From each group 14 specimens were stored in distilled water at 37° C for 24 ‎hours, 7 days, and 72 days. At the end of each interval, the samples were tested for the shear bond strength using a universal testing machine (Instron). Data were analyzed using the Independent t-test and One Way ANOVA Test and Duncan’s Multiple Range Test.

Results: All bonding systems showed lower bonding strength when samples were treated with desensitizer with a significant difference at all time intervals except for the i bond group which showed no significant difference in bond strength at a period of 7 and 72 days in treated and without desensitizer treated samples.

Conclusion: Obliteration of dentinal by dentin desensitizer may have a negative effect on the bonding strength of the self-etching bonding systems.

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