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Related Experiment Videos

Comparison of commercial elastomeric impression materials.

R G Craig1, N J Urquiola, C C Liu

  • 1Department of Biologic and Materials Sciences, University of Michigan, School of Dentistry, Ann Arbor 48109-1078.

Operative Dentistry
|May 1, 1990
PubMed
Summary

Newer addition silicones and polyethers generally outperform older polysulfides and condensation silicones. However, material selection for dental impressions should rely on specific property data, not just material type.

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Rubber impression materials are crucial for accurate dental prosthetics.
  • Advancements in silicone and polyether chemistry have led to new product formulations.
  • Understanding the comparative properties of these materials is essential for clinical success.

Purpose of the Study:

  • To compare the properties of recently marketed rubber impression materials with older formulations.
  • To evaluate the performance differences between various classes of elastomeric impression materials.
  • To guide the selection of appropriate impression materials based on empirical data.

Main Methods:

  • Comparative analysis of key physical and chemical properties.

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  • Testing included parameters such as dimensional stability, elastic recovery, and tear strength.
  • Evaluation of addition silicones, polyethers, condensation silicones, and polysulfides.

    • Main Results:

    • Addition silicones and polyethers generally exhibited superior properties compared to polysulfides and condensation silicones.
    • Significant variations in properties were observed even within the same material class and type.
    • No single material class universally outperformed all others across all tested properties.

    Conclusions:

    • The selection of dental rubber impression materials should be based on specific performance data relevant to the clinical application.
    • Reliance solely on material classification (e.g., addition silicone, polyether) may not guarantee optimal outcomes.
    • Clinicians should consult detailed property data to make informed material choices for accurate dental impressions.