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Related Experiment Videos

Silicone materials for ear impressions.

M Nolan, E C Combe

    Scandinavian Audiology
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Addition-cured silicones exhibit superior dimensional stability compared to condensation silicones. This research highlights the benefits of new dental materials for accurate ear impressions.

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    Area of Science:

    • Dental Materials Science
    • Polymer Chemistry

    Background:

    • Ear impression materials are crucial for custom hearing aid and audiology device fabrication.
    • Commonly used condensation reaction silicones have known limitations in dimensional accuracy over time.

    Purpose of the Study:

    • To compare the physical and mechanical properties of condensation reaction silicones and addition reaction silicones.
    • To evaluate the dimensional stability and performance characteristics of new dental silicone materials.

    Main Methods:

    • Measurement of dimensional stability, weight change, viscosity, and syringing characteristics.
    • Assessment of material tear energy and stress relaxation properties.
    • Comparative analysis between condensation and addition-cured silicone ear impression materials.

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    Main Results:

    • Addition-cured silicones demonstrated excellent dimensional stability with no significant shrinkage.
    • Condensation silicones exhibited a linear shrinkage of approximately 0.5% over 48 hours.
    • Differences were noted in viscosity, tear energy, and stress relaxation between the two silicone types.

    Conclusions:

    • Addition-cured silicones offer superior dimensional accuracy for ear impression applications.
    • The minimal shrinkage of addition silicones makes them a more reliable choice for precise dental and audiology fittings.
    • Further research into the long-term performance and clinical application of addition silicones is warranted.