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Related Experiment Videos

Effect of aging on dentin bonding

J Tagami1, M Nakajima, T Shono

  • 1Tokyo Medical and Dental University, Faculty of Dentistry, Department of Operative Dentistry, Tokyo, Japan.

American Journal of Dentistry
|June 1, 1993
PubMed
Summary
This summary is machine-generated.

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This study found that aging dentin did not significantly affect the tensile bond strengths of four dentin bonding systems. All tested systems demonstrated similar bond strengths in both young and old teeth, suggesting age is not a critical factor.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Adhesive Dentistry

Background:

  • Dentin aging can potentially alter its surface properties and chemical composition.
  • Understanding the impact of dentin aging on bonding systems is crucial for long-term clinical success.
  • Previous research has yielded varied results regarding the influence of patient age on dental adhesive performance.

Purpose of the Study:

  • To investigate the effect of dentin aging on the tensile bond strengths of four contemporary dentin bonding systems.
  • To compare the bonding performance of different systems on dentin from young versus older patients.
  • To analyze the failure modes of bonded interfaces in relation to dentin age and bonding system.

Main Methods:

  • Tensile bond strength testing was performed on proximal dentin samples from young (9-21 years) and old (42-64 years) premolars.

Related Experiment Videos

  • Four distinct dentin bonding systems were evaluated: Clearfil Linerbond System, Super Bond D-Liner, Clearfil Photo Bond, and Resto Bond 3.
  • Scanning Electron Microscopy (SEM) was utilized to examine the failure interfaces and characterize the morphology of the bond site.

    • Main Results:

    • Clearfil Linerbond System and Super Bond D-Liner exhibited superior bond strengths compared to Clearfil Photo Bond and Resto Bond 3 across both age groups.
    • Despite variations in bonding systems and dentin age, all four products achieved comparable bond strengths.
    • SEM analysis revealed consistent resin impregnation of the dentin surface, with adhesive failures predominantly occurring at the interface between the bonding resin and this layer.

    Conclusions:

    • Dentin aging does not appear to significantly compromise the tensile bond strength of the evaluated dentin bonding systems.
    • The tested bonding systems demonstrate robust performance irrespective of patient age, indicating resilience to dentin aging effects.
    • Failure analysis suggests that the interface between the bonding resin and the resin-impregnated dentin layer is a critical zone for adhesive debonding.