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Related Experiment Videos

Porosity in composite resins

V Fano1, I Ortalli, K Pozela

  • 1Istituto di Scienze Fisiche dell'Università, Parma, Italy.

Biomaterials
|November 1, 1995
PubMed
Summary
This summary is machine-generated.

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Porosity in composite resins is influenced by extrusion orifice diameter and spatulation. Spatulation of chemically-activated pastes significantly increased small porosities, impacting material integrity.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Dental Materials

Background:

  • Porosity in composite resins can affect their mechanical properties and clinical performance.
  • Understanding factors influencing porosity is crucial for optimizing dental material applications.

Purpose of the Study:

  • To investigate the porosity of composite resin pastes before and after polymerization.
  • To evaluate the impact of extrusion orifice diameter and spatulation on resin porosity.

Main Methods:

  • Microscopic analysis of composite resin layers with thicknesses of approximately 300 microns or less.
  • Measurement of porosity in relation to extrusion orifice size and spatulation.

Main Results:

  • A significant correlation was observed between extrusion orifice diameter and porosity, with some exceptions.

Related Experiment Videos

  • Spatulation of chemically-activated composite resin pastes consistently increased the number of small porosities (10-40 microns).

    • Conclusions:

    • Extrusion orifice diameter is a key factor influencing composite resin porosity.
    • Spatulation of chemically-activated resins leads to increased micro-porosity, potentially affecting material quality.