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
DOI:
https://doi.org/10.3889/oamjms.2022.9542Keywords:
Desensitizing agent, Quadrant FiniSense, G-Premio bonding, Shear bond strength, i bond, Clearfil S3 bound plusAbstract
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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Copyright (c) 2022 Ashraf S. Al-Chalabi, Rajaa Taher, Makdad Chakmakchi (Author)
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