What question did this study set out to answer?

To assess and compare the shear bond strength and failure modes of a self-adhering flowable resin composite versus a conventional total-etch composite on human molar enamel and dentin surfaces.

August 4, 2019Open Access Macedonian Journal of Medical SciencesOpen Access

Evaluation of Shear-Bond-Strength of Dental Self-Adhering Flowable Resin-Composite versus Total-Etch One to Enamel and Dentin Surfaces: An In-Vitro Study

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Authors

RARasha M. AbdelraoufCairo University MMManar MohammedNorthern Technical University FAFatma AbdelgawadCairo University

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Implication

In vitro study reveals lower shear bond strength for self-adhering versus total-etch flowable resin composites across permanent molar surfaces, indicating a need for material refinement.

Key Points

To assess and compare the shear bond strength and failure modes of a self-adhering flowable resin composite versus a conventional total-etch composite on human molar enamel and dentin surfaces.
Thirty-six sound human permanent molars (N=36) were divided across three surface preparations: uncut enamel, cut enamel with minimal grinding, and dentin.
Teeth in each group were bonded to either a self-adhering flowable composite (Dyad-flow) or a total-etch flowable composite (Filtek Z350-XT) using 3 × 3 mm cylinders light-cured for 20 seconds.
Samples were stored in 37°C distilled water for 24 hours prior to shear bond strength testing with a universal testing machine and failure mode evaluation via digital microscopy.
Mean shear bond strength was significantly higher for total-etch than self-adhering composite in uncut enamel (24.6 MPa vs. 3.5 MPa; P ≤ 0.01) and cut enamel (12.7 MPa vs. 4.5 MPa; P ≤ 0.01).
Mean shear bond strength in dentin was significantly greater for total-etch than self-adhering composite (6.7 MPa vs. 4.3 MPa; P ≤ 0.05).
Failure modes for the self-adhering composite were predominantly adhesive (83.3% in enamel and 100% in dentin), whereas total-etch composites demonstrated mixed and cohesive failures in enamel (50% each) and 100% adhesive failure in dentin.

Cite This Study

Abdelraouf et al. (2019) studied this question.

synapsesocial.com/papers/6a70d153febe604dd7099612 https://doi.org/10.3889/oamjms.2019.579

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Implication

In vitro study reveals lower shear bond strength for self-adhering versus total-etch flowable resin composites across permanent molar surfaces, indicating a need for material refinement.

Evaluation of Shear-Bond-Strength of Dental Self-Adhering Flowable Resin-Composite versus Total-Etch One to Enamel and Dentin Surfaces: An In-Vitro Study

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Cite This Study

Evaluation of Shear-Bond-Strength of Dental Self-Adhering Flowable Resin-Composite versus Total-Etch One to Enamel and Dentin Surfaces: An In-Vitro Study

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Cite This Study

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