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Related Experiment Videos

Orthodontic elastic materials.

A K Wong

    The Angle Orthodontist
    |April 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Latex and synthetic elastomers exhibit significant force decay, especially within the first day of use. Proper application and pre-stretching are crucial for optimal clinical performance of these orthodontic materials.

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    Area of Science:

    • Biomaterials Science
    • Orthodontic Materials Research
    • Polymer Science

    Background:

    • Latex and synthetic elastomers are widely used in orthodontics for force delivery.
    • Understanding their mechanical properties, such as force decay and resilience, is critical for effective treatment.
    • Variability in material properties can impact clinical outcomes.

    Purpose of the Study:

    • To compare the mechanical properties and force decay of latex and synthetic elastomers.
    • To evaluate the resilience and tensile strength of different orthodontic elastic chains.
    • To provide insights into the behavior of these materials under clinical conditions.

    Main Methods:

    • Comparative testing of latex and synthetic elastomers under tensile stress over a 21-day period.

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  • Measurement of initial force, force decay, and modulus of elasticity.
  • Assessment of material behavior in both dry and wet conditions.

    • Main Results:

    • Latex elastics showed greater strength loss than synthetic elastomers over 21 days.
    • Significant initial force decay (up to 73% in the first day) was observed in synthetic elastomers.
    • Unitek AlastiK chains exhibited higher initial force but comparable force decay to Ormco Power Chain.
    • Materials showed reduced modulus of elasticity after water bath immersion.
    • Synthetic elastomers demonstrated plastic deformation after prolonged stretching.

    Conclusions:

    • Both latex and synthetic elastomers experience substantial force decay, necessitating clinical consideration.
    • Pre-stretching synthetic elastomers and utilizing them within their resilient range is recommended.
    • Orthodontic treatment planning must account for the initial rapid force decay and residual forces of elastic materials.