Early and 24-hour shear bond strength to dentine of three calcium silicate based pulp capping materials

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Published: Aug 30, 2018
Keywords:
Biodentine, bond strength, calcium silicate, dentine, pulp capping, RetroMTA

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Danuchit Banomyong
คณะทันตแพทยศาสตร์ มหาวิทยาลัยมหิดล
Sopita Ritsayam
Jeeraphat Jantarat
Chitpol Chaimanakarn

Abstract

Objective: The aim of this study was to evaluate shear bond strength (SBS) at early and 24 h after setting of three calcium silicate based capping materials.


Materials and Methods: Eighty permanent maxillary premolars were sectioned to expose coronal dentine. Specimens were randomly divided into four groups, n=20 each. Biodentine, RetroMTA, Theracal, and Dycal (control) were filled in 3-mm diameter tubes and placed on dentine. In each group, specimens were further divided into two subgroups for SBS testing at 60 min and 24 h (n=10 each). Failure modes were evaluated using a stereomicroscope.


Results: At 60 min, all tested materials showed very low mean SBS (0.38-0.42 MPa), that did not significantly differ (p >0.05), and all specimens showed 100% adhesive failure. At 24 h, means SBS of Biodentine (1.01 MPa) and RetroMTA (1.15 MPa) significantly increased and were significantly higher than those of Dycal (0.37 MPa) and Theracal (0.44 MPa) (p <0.05). However, 24-h SBS of Biodentine and RetroMTA were not significantly different (p >0.05). In addition, 24-h bond strength of Theracal was not significantly different from that of Dycal (p >0.05). Dycal and Theracal showed 100% adhesive failure, while mixed failure was observed in Biodentine and RetroMTA groups.


Conclusions: SBS of Biodentine, Theracal and RetroMTA were very low at 60 min and did not significantly differ from Dycal. SBS of Biodentine and RetroMTA significantly increased at 24 h and were higher than Theracal and Dycal.

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How to Cite
1.
Banomyong D, Ritsayam S, Jantarat J, Chaimanakarn C. Early and 24-hour shear bond strength to dentine of three calcium silicate based pulp capping materials. M Dent J [Internet]. 2018 Aug. 30 [cited 2024 May 2];38(2):177-83. Available from: https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/179328
Issue
Vol. 38 No. 2 (2018): May-August
Section
Original articles

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