Original Research Article
Year: 2020 | Month: January | Volume: 10 | Issue: 1 | Pages: 175-182
Quantitative and Qualitative Assessment of Sealing Ability of Different Root Canal Sealing Materials
Reem Ahmed A.Fattah1; Hoda A. Fansa2; Safinaz A.Wahab1; Ahmed Z. Zidan1
1Restorative Dentistry Department, Faculty of Dentistry, Umm AlQura University
2Basic &Clinical Oral Sciences Department, Faculty of Dentistry, Umm AlQura University
Corresponding Author: Hoda A. Fansa
ABSTRACT
Background: The use of resin-based dentin adhesives has become routine in dentistry. As a result, marginal leakage in conjunction with bonded restorations is greatly reduced, however true adhesive restorative materials do not exist at present, and the bonding is due to micromechanical retention of the resinous material to the tooth. As some endodontic sealing materials have high bond strength to dentin but may suffer from solubility and improper sealing ability. Consequently, evaluation of some properties of these materials may be advantageous for proper selection of which type to be used.
Aim: The aim of this study was to evaluate the sealing capacity and the bond strength of two different types of root canal sealing materials.
Methodology: A total of 20 single-rooted human mandibular premolar teeth with single canals were instrumented using step back technique. The prepared canals were obturated with lateral compaction technique using gutta percha and two different types of sealers; 10 with resin- based sealer (Group 1) and 10 with silicone -based sealer (Group 2). Each root was sectioned horizontally into 2 slices, each slice is 2mm, the coronal part just below the cemento-enamel junction was used in the push-out shear bond strength test. The following 2 mm slice of the filled roots was used in the sealing capacity or permeability test, using fluid filtration device. Permeability was measured by tracing the displacement of an air bubble on top of a millimeter scale for 24 hours. A random disc from each group was kept for qualitative evaluation of dentin\sealer interfaces with the scanning electron microscope. The results were subjected to statistical analysis using Kruskal Wallis and Mann Whitney tests.
Results: The data indicates that the mean fluid leakage value of the silicone -based sealer (Group 2) was less than that of the resin- based sealer (Group 1). While the resin- based sealer (Group 1) exhibited higher statistically significant mean shear bond strength than silicone -based sealer.
Conclusion: Improved bonding of sealers to dentin does not necessarily mean the improvement of sealing ability.
Key words: Fluid filtration device, sealing capacity, sealers.