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Related Experiment Videos

Transverse bend testing of denture base polymers.

G D Stafford, R W Handley

    Journal of Dentistry
    |November 1, 1975
    PubMed
    Summary
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    A new test rig allows for accurate transverse bend testing of denture base polymers. Most materials met ISO standards, but water immersion may have weakened some, causing them to fail.

    Area of Science:

    • Materials Science
    • Biomaterials Engineering
    • Polymer Science

    Background:

    • Denture base polymers are crucial in prosthodontics.
    • Standardized testing is essential for material quality control.
    • Previous research indicates material saturation in water after one month.

    Purpose of the Study:

    • To design and validate a test rig for transverse bend testing of denture base polymers.
    • To evaluate the performance of denture base polymers against ISO standards.
    • To investigate the effect of water immersion on material strength.

    Main Methods:

    • A novel test rig was designed for transverse bend testing using an Instron machine.
    • Denture base polymer specimens were tested under conditions simulating ISO/R 1567 (1974).

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  • Specimens were immersed in water for one month prior to testing to ensure saturation.

    • Main Results:

    • The designed test rig provided accurate and easy transverse bend testing.
    • Out of the tested denture base polymers, all but three met the ISO standard criteria.
    • Water immersion, while ensuring saturation, may have contributed to the failure of some materials.

    Conclusions:

    • The developed test rig is effective for evaluating denture base polymers.
    • Most tested polymers meet current ISO standards for transverse bend strength.
    • The potential weakening effect of water immersion on denture base polymers warrants further investigation.