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Related Experiment Videos

Siloranes in dental composites.

Wolfgang Weinmann1, Christoph Thalacker, Rainer Guggenberger

  • 13M ESPE, Seefeld, Germany.

Dental Materials : Official Publication of the Academy of Dental Materials
|February 1, 2005
PubMed
Summary

A new Silorane-based composite shows significantly lower polymerization shrinkage (<1 vol%) and excellent ambient light stability compared to methacrylate-based dental restoratives.

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry

Background:

  • Methacrylate-based dental composites are widely used but suffer from polymerization shrinkage.
  • Silorane-based composites offer an alternative polymerization mechanism.

Purpose of the Study:

  • To compare the product profile of a Silorane-based composite with methacrylate-based restoratives.
  • To evaluate mechanical properties and light stability.

Main Methods:

  • Investigated compressive strength, flexural strength, E-Modulus, and ambient light stability.
  • Determined shrinkage using Archimedes and bonded disk methods.
  • Analyzed data using ANOVA and t-tests.

Main Results:

  • Silorane composite exhibited the lowest polymerization shrinkage (0.94-0.99 vol%).
  • Silorane showed comparable reactivity to Tetric Ceram.
  • Silorane demonstrated superior ambient light stability (>10 min) versus methacrylates (55-90 s).

Conclusions:

  • Silorane's ring-opening chemistry achieves sub-1 vol% shrinkage.
  • Mechanical properties are comparable to established methacrylate composites.
  • Silorane-based materials present a promising alternative for dental restorations.

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