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Related Experiment Videos

[Dentin-dentinal adhesive interaction. Calorimetric measurement].

E Angelini1, M Pezzoli, F Zucchi

  • 1Politecnico di Torino.

Dental Cadmos
|February 15, 1990
PubMed
Summary

Calorimetric measurements reveal varying thermal effects for dental adhesives, suggesting differences in bonding mechanisms. This method may help distinguish between mechanical and chemical adhesion in dental materials.

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Area of Science:

  • Biomaterials Science
  • Dental Materials Science
  • Adhesion Science

Background:

  • Evaluating the bond strength of dental adhesives to dentin is crucial for restoration longevity.
  • Existing methods like tensile/shear bond strength and marginal leakage measurements lack consistent reliability.
  • Understanding the nature of adhesion (mechanical vs. chemical) can inform material selection and application.

Purpose of the Study:

  • To investigate the utility of calorimetric measurements in assessing dental adhesive systems.
  • To compare the thermal reactions of three common dental adhesives: Scotchbond, Gluma, and Dentin Adhesit.
  • To explore whether calorimetry can differentiate between mechanical and chemical bonding contributions.

Main Methods:

  • Utilized a calorimeter with specialized reaction vessels for controlled reactant contact post-thermostatization.

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  • Performed calorimetric measurements on Scotchbond, Gluma, and Dentin Adhesit adhesive systems.
  • Quantified the thermal effects generated by the curing or reaction processes of the adhesives.

    • Main Results:

    • All tested adhesive systems exhibited a measurable thermal effect.
    • Scotchbond and Gluma demonstrated significantly greater thermal effects compared to Dentin Adhesit.
    • The observed thermal values represent the cumulative effect of multiple reaction pathways.

    Conclusions:

    • Calorimetric measurements provide a quantifiable thermal response for dental adhesives.
    • The magnitude of the thermal effect varies among different adhesive systems, indicating distinct reaction profiles.
    • Calorimetry shows potential as a tool to investigate the underlying mechanisms of dental adhesion.