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Related Experiment Videos

Superelastic materials displaying different force levels within one archwire

D M Ibe, D Segner

    Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopadie : Organ/Official Journal Deutsche Gesellschaft Fur Kieferorthopadie
    |March 20, 1998
    PubMed
    Summary

    New orthodontic archwires promise varied force levels but testing revealed significant differences. Only two of six tested nickel-titanium wires demonstrated suitable superelastic properties for effective tooth movement.

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    European journal of orthodontics·1995

    Area of Science:

    • Orthodontics
    • Biomaterials Science
    • Dental Mechanics

    Background:

    • Novel orthodontic archwires claim to deliver varying force levels within a single arch.
    • These advanced materials aim to optimize force application for teeth with diverse root surface areas, potentially minimizing side effects like root resorption and pain.

    Purpose of the Study:

    • To evaluate the claimed superelastic properties of multi-force orthodontic archwires.
    • To determine the extent to which these wires exhibit their advertised force modulation capabilities.

    Main Methods:

    • Load-deflection curves were generated for six superelastic nickel-titanium archwires from four manufacturers.
    • A simple beam bending test was conducted at mouth temperature, incorporating activation-deactivation cycles via a computer-controlled stepper motor.

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  • Each archwire was tested at four distinct points to assess property consistency.

    • Main Results:

    • Significant discrepancies were observed between manufacturers' claims and the actual superelastic properties of the tested archwires.
    • Substantial variations in performance were noted among the different products evaluated.
    • Only two of the six tested archwires exhibited superelastic properties within a force range deemed appropriate for orthodontic tooth movement.

    Conclusions:

    • The superelastic properties of commercially available multi-force orthodontic archwires do not consistently meet manufacturers' claims.
    • There is considerable variability in performance among different brands and products.
    • Further research and stringent quality control are necessary to ensure these advanced archwires provide predictable and effective orthodontic treatment.