Bond strength evaluation of various pulp capping materials to various resin based restorations utilizing different adhesion approaches

Document Type : Original Article

Authors

1 Department of Operative Dentistry, Faculty of Dentistry, Ain Shams University, Cairo, Egypt

2 Department of Restorative Dental Science, College of Dentistry, Taibah University, Madinah, Saudi Arabia

Abstract

Aim: compare shear bond strength SBS between various pulp capping materials and various resin based restoration utilizing two different adhesion approaches.
Materials and Methods: 180 acrylic molds were used. The samples were divided into three main groups according to pulp capping materials, namely; Base.it light curing cavity base and liner, Dycal and MTA Plus;(n = 60) of each. Then each group was further subdivided into two subgroups according to restorative materials used, flowable resin composite resin modified glass ionomer, (n = 30). Each subgroup was further divided into two subgroups according to adhesion strategy of surface treatment, etch and rinse ER and self-etch SE (n=15). All the used materials prepared and injected inside the holes and covered with celluloid strips and small glass slide to ensure standardization. Then, the surface of each material treated with the different adhesive approaches. Then the different tested restorative materials filled in transparent tube of 3×2mm applied. SBS test carried out by mounting the specimens on Hounsfield Universal testing machine at a cross head speed of 1 mm/min. The SBS calculated and expressed in MPa. All fractured debonded surface samples then examined by Stereomicroscope.
Result: three-way ANOVA test showed a significant interaction between tested variables. Base.it had the highest SBS values followed by MTA plus while the lowest values found with Dycal. A significantly higher bond strength values achieved with ER in both tested restorative materials; (p<0.001).
Conclusion: When compared to MTA Plus and Dycal, Base.it generated the highest SBS to tested restorative materials.

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Egyptian Dental Journal
Volume 70, Issue 1 - Serial Number 5
January (Conservative Dentistry and Endodontics)
January 2024
Pages 795-807

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