A comparative study to evaluate the shear bond strength of different resin sealers to dentin (An in vitro study)

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Samar Abdul Hamed
Majida Q Al-Hashimi

Abstract

Background: One of the major problems in endodontics is micro-leakage of root canal fillings which might contribute to the failure of endodontic treatment. To avoid this problem, a variety of sealers have been tested. The objective of this, in vitro, study was to evaluate the shear bond strength of four resin based sealers (AH plus, silver free AH26, RealSeal SE and Perma Evolution permanent root canal filling material) to dentin.
Materials and Methods: Forty non-carious extracted lower premolars were used. The 2mm of the occlusal surfaces of teeth were sectioned, to expose the dentin surface. The exposed dentin surfaces of teeth were washed with 5ml of 2.5% NaOCl solution followed by 5ml of 17 % EDTA then rinsed by deionized water to remove the smear layer. The teeth were divided into four groups according to the type of sealer used: Group A: silver free AH26, Group B: AH plus., Group C: RealSeal SE, Group D: Perma Evolution. Polyethylene tube cylinders (4mm internal diameter & 5mm length) were fixed on the dentin surfaces. Then freshly mixed sealers were poured into the tubes and allowed to bench set for two hours and were stored at 100% humidity and 37?C for one week. With an Instron machine, the shear bond strength between the tested sealers and the dentin, in Mpa, was measured. Statistical analysis was carried out using the one-way ANOVA and Student’s t-tests.
Results: Perma Evolution scored the highest mean value of sheer bond strength, being 3.343 Mpa followed by the AH plus (2.786 Mpa) and AH26 (2.149 Mpa). While the RealSeal scored the lowest mean value of sheer bond strength, which was (1.831 Mpa). ANOVA test results showed a highly statistically significant difference. Student's t test results revealed significant differences between all the compared groups, except one paired group had a non-significant difference in the shear bond strength which was between the AH plus and Perma Evolution groups (P>0.05).
Conclusions: The results of this study pointed to Perma Evolution which scored the highest sheer bond strength between the tested sealers.

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How to Cite
1.
Samar Abdul Hamed, Al-Hashimi MQ. A comparative study to evaluate the shear bond strength of different resin sealers to dentin (An in vitro study). J Bagh Coll Dent [Internet]. 2014 Mar. 15 [cited 2024 Nov. 21];26(1):49-52. Available from: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/296
Section
Restorative Dentistry

How to Cite

1.
Samar Abdul Hamed, Al-Hashimi MQ. A comparative study to evaluate the shear bond strength of different resin sealers to dentin (An in vitro study). J Bagh Coll Dent [Internet]. 2014 Mar. 15 [cited 2024 Nov. 21];26(1):49-52. Available from: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/296

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