Shear bond strength of eugenol- and non-eugenol-based endodontic sealers to gutta-percha and dentin: Aninvitrostudy

Abstract

Aims:a) To evaluate the bond strength of eugenol- and non-eugenol-based endodontic sealers to gutta-percha and dentin and b) To make a comparative evaluation of the bond strength of sealers to gutta-percha and dentin.Material and Methods:Seventy-two specimens were used in this study, which was divided into two groups — group I consisting of 36 freshly extracted human molars with 2 mm coronal cut surface; and group II consisting of gutta-percha disks of 10 mm diameter and 2 mm thickness embedded in 36 plaster of Paris specimens. Group I was further divided into three subgroups: subgroup 1, subgroup 2, and subgroup 3, consisting of 12 teeth each; and group II was further divided into three subgroups: subgroup 1, subgroup 2, and subgroup 3, consisting of 12 plaster specimens each. Each subgroup consisted of two materials each, which were placed in 5 mm long sections of polyethylene tubing and were then placed on coronal 2 mm cut surface of human molars; likewise subgroup 1, subgroup 2, and subgroup 3 of group II consisted of two materials each, which were also placed in 5 mm long sections of polyethylene tubing and then placed on gutta-percha disks 10 mm in diameter and 2 mm in thickness, which were embedded in the plaster specimens. After the materials were set, the specimens were subjected to test for shearing bond strength using a universal testing machine (Instron).Statistical Analysis:Mann-Whitney U test.Results:Group I, i.e., zinc oxide eugenol sealers, showed more bond to gutta-percha than to dentin, in which subgroup 2b, endomethasone, showed the maximum bond. Group II, i.e., non-zinc oxide eugenol sealers, showed more bond to dentin than to gutta-percha, where the maximum bond was shown by subgroup 3b, EndoRez.Conclusion:Under the circumstances of this in vitro study, all the six endodontic sealers had significant differences in terms of shear bond strength to gutta-percha and dentin.

An in vitro comparison of bond strengths of Gutta-percha/AH Plus, Resilon/Epiphany self-etch and EndoREZ obturation system to intraradicular dentin using a push-out test design

“…The bond strength of root canal sealers to dentin is important for maintaining the integrity of the seal in root canal filling. [1718] Although sealers can form close adhesion to the root canal wall, none is able to bond to gutta-percha; leaving a gap through which bacteria may pass. [9] An improved bond and creation of monoblockare considered to be the main advantages of Resilon/EpihanySE and EndoREZ oburation system.…”

The effects of chlorhexidine and ethanol on push-out bond strength of fiber posts

“…[ 13 ] The association of ethanol and/or CHX can be used to prevent a reduction in bond strength values when using FRCR cemented with resin cement. [ 7 ] Studies[ 24 25 26 27 28 ] with different protocols of root dentin pretreatment have been conducted. However, there are no studies that evaluate the effects of CHX diacetate associated with ethanol on the bond strength of FRCR in human dentin.…”

A Comparative Evaluation of Push-Out Bond Strength of Six Different Root Canal Sealers: An In-Vitro Study

“…According to Mathew ST et al's procosol which is a zinc-oxide Eugenol-based sealer exhibited weak dentin adhesion, but stronger adhesion to gutta-percha over calcium hydroxide and resin-based root canal sealers [ 20 ]. These findings were consistent with the outcomes of the current research.…”