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Mechanical properties of elastomeric impression materials.

N S Salem1, E C Combe, D C Watts

  • 1Biomaterials Science Unit, University of Manchester, U.K.

Journal of Oral Rehabilitation
|March 1, 1988
PubMed
Summary
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This study compared the mechanical properties of dental elastomeric impression materials. Polysulphides showed the best tearing resistance but lower tensile strength and elasticity compared to silicones.

Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Dental Materials

Background:

  • Dental impression materials are crucial for prosthodontic restorations.
  • Elastomeric materials offer high accuracy and dimensional stability.
  • Understanding their mechanical properties is vital for clinical success.

Purpose of the Study:

  • To evaluate and compare the mechanical properties of various dental elastomeric impression materials.
  • To determine tearing energy, tensile properties, and elastic modulus at high strain rates.
  • To provide data for selecting appropriate impression materials based on performance.

Main Methods:

  • Investigated addition silicones, condensation silicones, polysulphides, and polyether impression materials.
  • Measured tearing energy, tensile strength, and elastic modulus.

Related Experiment Videos

  • Utilized high strain rate testing to simulate clinical conditions.

    • Main Results:

    • Polysulphides exhibited superior tearing resistance compared to silicones.
    • Silicones demonstrated higher tensile strength and elastic modulus than polysulphides.
    • Polyether materials showed mechanical properties comparable to silicones.

    Conclusions:

    • Material selection should consider the balance between tearing resistance and tensile properties.
    • Silicones are generally favorable for applications requiring high strength and elasticity.
    • Polysulphides may be preferred when high tearing resistance is paramount.