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Related Experiment Videos

Biodegradation of the orthodontic bracket system.

R Maijer, D C Smith

    American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
    |September 1, 1986
    PubMed
    Summary

    Orthodontic brackets, both new and recycled, can corrode over time. Recycling processes significantly increase bracket susceptibility to corrosion, highlighting the need for careful material evaluation.

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    Area of Science:

    • Materials Science
    • Biomedical Engineering
    • Dental Materials

    Background:

    • Orthodontic appliances, including wires and brackets, are susceptible to corrosion in the oral environment.
    • Corrosion can lead to the electrochemical breakdown of even corrosion-resistant materials like nickel-titanium alloys.
    • The increasing use of recycled materials in dental applications necessitates an understanding of their impact on performance and safety.

    Purpose of the Study:

    • To evaluate the in vitro corrosion behavior of new and recycled orthodontic brackets.
    • To compare the corrosion resistance of different brands of new orthodontic brackets.
    • To determine the effect of commercial recycling processes on the corrosion liability of orthodontic brackets.

    Main Methods:

    • An in vitro artificial saliva system was utilized for corrosion testing.

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  • New and recycled orthodontic brackets were subjected to electrochemical evaluation.
  • Corrosion behavior was assessed using standardized in vitro testing protocols.

    • Main Results:

    • Significant differences in corrosion behavior were observed among various brands of new orthodontic brackets.
    • All three commercial recycling processes tested increased the susceptibility of brackets to corrosion.
    • Two specific types of bracket bases demonstrated superior corrosion resistance compared to others.

    Conclusions:

    • Bracket corrosion is a potential concern in orthodontic treatment and can be evaluated using simple in vitro tests.
    • Recycling of orthodontic brackets, as performed by commercial processes, appears to compromise their corrosion resistance.
    • Material selection and processing methods are critical factors influencing the long-term performance and safety of orthodontic appliances.