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Related Experiment Videos

Maurício Bottene Guarda1, Rafael Rocha Pacheco2, Isaias Donizeti Silva3

  • 1State University of Campinas, Piracicaba Dental School, Piracicaba, SP, Brazil.

Brazilian Dental Journal
|December 8, 2022
PubMed
Summary
This summary is machine-generated.

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Applying electric currents, both direct and reverse, significantly enhanced resin composite-dentin bond strength across all tested adhesive systems. This method shows promise for improving dental restoration durability.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Adhesive Dentistry

Context:

  • Dental restorations rely on strong bonds between resin composites and tooth structure.
  • Optimizing resin-dentin bond strength is crucial for restoration longevity and preventing secondary caries.
  • Electric currents represent a novel approach to potentially enhance adhesive performance in dentistry.

Purpose:

  • To investigate the effect of direct and reverse electric current application on resin composite-dentin bond strength.
  • To evaluate the influence of electric current on three different adhesive systems (two-step self-etch, one-step self-etch, and two-step etch-and-rinse).
  • To assess the impact of storage time (24 hours and 6 months) on bond strength under electric current application.

Summary:

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  • Microtensile bond strength (µTBS) was measured for three adhesive systems under control, direct, and reverse electric current conditions (35µA) after 24 hours and 6 months of storage.
  • Both direct and reverse electric currents increased µTBS for all adhesive systems compared to the control.
  • Electric current application resulted in longer resin tags and did not significantly decrease bond strength after 6 months of storage, though one system (SBU) showed lower values in specific control and direct current conditions.

    • Impact:

    • The study demonstrates that applying a 35µA electric current in either direction can improve resin composite-dentin bond strength.
    • This finding suggests a potential new method for enhancing the clinical performance and durability of dental adhesive restorations.
    • The results indicate that electric current application is a viable strategy for strengthening the adhesive interface in dentistry.