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In Vitro Comparison of Shear Bond Strength of a Flowable Composite Resin and a Single-Component Glass-Ionomer to Three Different Pulp-Capping Agents; [Porownanie in Vitro Wytrzymalosci Na Scinanie Wiazania Plynnej Zywicy Kompozytowej I Jednoskladnikowego Szklo-Jonomeru Z Trzema Materialami Do Pokrycia Miazgi] Publisher Pubmed



Zarean P1 ; Roozbeh R2 ; Zarean P1 ; Jahromi MZ4 ; Broujeni PM5
Authors
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Authors Affiliations
  1. 1. Dental Implant Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Iran
  2. 2. Yazd, Iran
  3. 3. Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Iran
  4. 4. Department of Endodontics, Dental School, Islamic Azad University, Isfahan (Khorasgan) Branch, Iran
  5. 5. Department of Esthetic Dentistry, Dental School, Islamic Azad University, Isfahan (Khorasgan) Branch, Iran

Source: Dental and Medical Problems Published:2019


Abstract

Background. Various materials are used for vital pulp capping and the bond strength of restorative materials to these pulp-capping agents significantly affects the success rate of vital pulp therapy. Objectives. The aim of this study was to determine the shear bond strength of a flowable composite resin and a single-component glass-ionomer to mineral trioxide aggregate (MTA), calcium-enriched mixture (CEM) cement and Biodentine™ as pulp-capping agents. Material and methods. Seventy-two cylindrical acrylic resin blocks, with a central hole 4 mm × 2 mm, were prepared. Mineral trioxide aggregate, CEM cement and Biodentine were placed in the cavities (n = 24 in each group) and incubated for 24 h. The blocks were subdivided into the composite resin and glass-ionomer subgroups. Cylindrical plastic molds, measuring 3 mm in height and diameter, were used to place the restorative materials on the samples. The shear bond strength test was performed at a strain rate of 1 mm/min in a universal testing machine. The samples were evaluated under a stereomicroscope at ×25 magnification for fracture modes. The data was analyzed with the one-way analysis of variance (ANOVA) and Tukey tests. Results. The maximum and minimum mean shear bond strength values were recorded in the Bioden-tine–composite resin (4.77 MPa) and MTA–glass-ionomer (2.20 MPa) groups, respectively. There were significant differences in the mean shear bond strength values of MTA, CEM cement and Biodentine to the composite resin and glass-ionomer (p < 0.001). Conclusions. A composite material may be preferable for definitive filling after pulp capping with Biodentine. © 2019 by Wroclaw Medical University.
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