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. 2017 Jun;21(5):1465-1473.
doi: 10.1007/s00784-016-1907-z. Epub 2016 Jul 19.

Shear bond strength and microleakage results for three experimental self-etching primer compositions for pit and fissure sealing

Sebastian Birlbauer  1 , Meng-Ling Chiang  1   2 , Christoph Schuldt  1 , Vinay Pitchika  1 , Reinhard Hickel  1 , Nicoleta Ilie  1 , Jan Kühnisch  3
Affiliations

Shear bond strength and microleakage results for three experimental self-etching primer compositions for pit and fissure sealing

Sebastian Birlbauer et al. Clin Oral Investig. 2017 Jun.

Abstract

Objectives: This in vitro study evaluated the shear bond strength (SBS) and microleakage of three experimental self-etching primers for pit and fissure sealing.

Materials and methods: The material used three formulations of an experimental fissure primer (EFP) applied without phosphoric acid etching (EFP-1/EFP-2/EFP-3) and one control group with sealant application after 30 s of acid etching. Four groups of sealants (n = 40 specimens/group) were tested for SBS, and a failure analysis was conducted after 1-day water storage, 3-month water storage, and 5000-fold thermocycling. In addition, microleakage was tested.

Results: The SBSs of the EFPs (range 8.2 MPa (standard deviation 4.2) to 15.4 MPa (5.4)) were generally significantly lower than those of conventional fissure sealing (range 15.6 MPa (4.4) to 19.1 MPa (6.2)). The SBS of EFP-3 was better than that of the EFP-1 or EFP-2 formulations. Microleakage was significantly lower in the control group (1.1 %) than in the EFP-1 (3.8 %) and lower than in EFP-3 (7.7 %) group. In the (multiple) linear regression analysis, material and aging significantly influenced SBS.

Conclusions: The SBS of EFP-3 was 15 to 32 % lower than it was for the corresponding controls.

Clinical relevance: The SBS is lower, but the main potential benefit of this new approach is a reduced application time in clinical practice.

Keywords: Microleakage; Pit and fissure sealant; Shear bond strength.

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Conflict of interest statement

Conflict of interest

The authors declare that they have no conflict of interest.

Funding

Ivoclar Vivadent, Schaan, Liechtenstein, supported this study by contributing the testing materials. The work was further supported by the Department of Conservative Dentistry and Periodontology of the Ludwig-Maximilians-University of Munich, Germany.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors. All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee.

Informed consent

For this type of study, formal consent is not required.

Figures

Fig. 1
Fig. 1
Overview of the investigated sealant procedures and the applied aging methods
Fig. 2
Fig. 2
Illustration of the laboratory workflow
See this image and copyright information in PMC

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