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Related Experiment Videos

[In vitro evaluation of two composite material for posterior restorations].

I Krejci1, F Lutz

  • 1Zahnarztlichen Instituts der Universität Zurich.

Stomatologie Der DDR
|August 1, 1990
PubMed
Summary

Two experimental composite resins showed low wear, but both had insufficient marginal adaptation. These materials are unsuitable for direct posterior dental fillings due to bonding agent and shrinkage issues.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Composite resins are widely used for dental restorations.
  • Evaluating new composite materials for wear resistance, marginal integrity, and radiopacity is crucial for clinical success.
  • Understanding material properties informs selection for posterior restorations.

Purpose of the Study:

  • To assess the wear resistance and abrasiveness of two experimental composite resins against enamel.
  • To evaluate the marginal adaptation and radiopacity of these novel materials.
  • To determine the suitability of the tested composite resins for direct posterior dental fillings.

Main Methods:

  • An in vitro study design was employed.
  • Wear resistance and abrasiveness against enamel were measured.
  • Marginal adaptation and radiopacity were assessed for both experimental composite resin materials.

Main Results:

  • The fine-particle hybrid composite demonstrated notably low wear.
  • Radiopacity for both tested materials was deemed only acceptable.
  • Insufficient marginal adaptation was observed in both materials, likely due to low-viscosity bonding agents and polymerization shrinkage.

Conclusions:

  • The experimental composite resins exhibited limitations in marginal adaptation.
  • The observed issues suggest these materials are not suitable for direct posterior composite fillings.
  • Further development is needed to improve bonding and reduce shrinkage in future composite resin formulations.

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