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Related Experiment Videos

Two-year composite/dentin bond stability.

J C Meiers1, D Young

  • 1Dept. of Prosthodontics and Operative Dentistry, University of Connecticut School of Dental Medicine, Farmington 06030-1615, USA. meiers@nso2.uchc.edu

American Journal of Dentistry
|September 27, 2001
PubMed
Summary
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The long-term bond strength of dental adhesives to dentin is questionable. After two years, two of three tested single-bottle adhesives showed significantly reduced composite-to-dentin bond strength compared to baseline.

Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry
  • Biomaterials

Background:

  • Single-bottle dentin adhesives offer simplified application in restorative dentistry.
  • Assessing the long-term durability of these adhesives is crucial for clinical success.
  • Understanding the influence of adhesive chemistry on bond longevity is essential.

Purpose of the Study:

  • To evaluate the 2-year shear bond strengths of three distinct single-bottle dentin adhesives.
  • To compare the performance of water-based, acetone-based, and ethanol-based adhesives.
  • To determine the long-term stability of composite-to-dentin bonds.

Main Methods:

  • Human molars were used, and occlusal dentin was exposed.
  • Adhesives (Syntac Single Component, Prime & Bond 2.1, OptiBond Solo) were applied after phosphoric acid etching.

Related Experiment Videos

  • Composite resin was bonded, light-cured, and tested for shear bond strength at multiple time points up to 24 months after thermocycling.

    • Main Results:

    • OptiBond Solo and Prime & Bond 2.1 showed increased bond strength at 6-12 months compared to baseline.
    • Syntac Single Component showed increased bond strength at 18 months.
    • At 24 months, OptiBond Solo and Syntac Single Component exhibited significantly reduced bond strengths compared to baseline.

    Conclusions:

    • The long-term stability of resin composite bonds to dentin using single-bottle adhesives is uncertain.
    • Two of the three tested adhesives (OptiBond Solo, Syntac Single Component) demonstrated decreased bond strength after two years.
    • Further research into adhesive longevity is warranted for predictable clinical outcomes.