Shear Bond Strength Measurement of Three Different Adhesive Sealers to Dentin & Gutta-percha (In Vitro Study)
Keywords:
Shear Bond Strength, Adhesive SealersAbstract
Background and Objective: Bond strength of the adhesive sealers to both human dentin and gutta-percha is critical property for success of the root canal sealing. This in vitro study aimed to measure the shear bond strength (SBS) of three different adhesive sealers (glass-ionomer based sealers (Ketac-Endo) and (Diaket) and epoxy resin-based sealer (AH 26) to both the gutta-percha and human dentin.
Methods: Part I: The dentin substrate was obtained from single rooted human teeth. The dentin specimens were treated either with EDTA 15% or phosphoric acid 37% to achieve the removal of smear layer. Three adhesive sealers (glass-ionomer based sealers (Ketac-Endo) and (Diaket) and epoxy resin-based sealer (AH 26) were placed on the dentin surfaces both with and without the use of the bonding agent. Bond strength was tested using a single plane shear test assembly. Part II: Discs of gutta-percha with a diameter of 8 mm and thickness of 4mm were made by softening of the gutta-percha cones and fixed with plaster in rings. Four millimeter long sections of polyethylene tube filled with freshly mixed sealer were placed on the gutta-percha and tested using a single plane shear test assembly.
Results: By using t-test, the results revealed that there was highly significant difference between epoxy resin-based sealer and the two other glass-ionomer based sealers at p< 0.01 with in favor of the AH26 sealer.
Conclusions: The bonding system & the dentin pretreatment increased the adhesive potential of the AH26 sealer which had higher shear bond strength than the two glass-ionomer based sealers
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References
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