COMPARATIVE STUDY
JOURNAL ARTICLE
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Comparative Evaluation of Shear Bond Strength and Microleakage of Two Self-adhering Composite Resins: An in vitro Study.

INTRODUCTION: A good dental cement used as repair material should possess chemical binding, easy handling characteristics, minimal marginal breakdown and minimal polymerization shrinkage, high resistance to wear, high cohesive strength, and good color stability. This study was undertaken to compare the in vitro microleakage and shear bond strength among the newly introduced Prime fill flow and Dyad flow.

AIM: The aim of this study was to determine the effect on shear bond strength and microleakage of two self-adhesive composite resin.

MATERIALS AND METHODS: Selected specimens were collected and stored in deionized water with an antibactericidal agent, 0.2% sodium azide, until ready to be used and were randomly divided into two groups: group I: Dyad flow and group II: Prime fill flow; specimens were sheared with a universal testing machine, and the results were calculated in megapascal, specimens were sectioned in a mesiodistal direction at four different locations, and analyzed for leakage (dye penetration) using a stereomicroscope.

RESULTS: The results of the present study showed that acceptable values for Prime fill flow seemed to have least microleakage and high bond strength as compared with Dyad flow.

CONCLUSION: Here, it can be concluded that there was significant difference in the in vitro microleakage and shear bond strength among the Prime fill flow and Dyad flow.

CLINICAL SIGNIFICANCE: Self-etch adhesives when compared with total-etch systems have the advantage of reducing the application time and the number of steps in pediatric dentistry. Patients' age and cooperation are not always ideal; the treatment outcome is greatly influenced by the patients' behavior. It is therefore imperative to recede the application time of some materials mostly in pediatric dentistry.

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