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Related Experiment Videos

Fluoride release from new light-cured orthodontic bonding agents.

C J McNeill1, W A Wiltshire, C Dawes

  • 1Section of Orthodontics, University of Manitoba, Winnipeg, Manitoba, Canada.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|October 19, 2001
PubMed
Summary

This study compared fluoride release from orthodontic bonding materials over six months. All tested fluoride-releasing materials showed potential to inhibit enamel decalcification.

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Area of Science:

  • Orthodontic Materials Science
  • Dental Biomaterials
  • Fluoride Chemistry

Background:

  • Orthodontic bonding materials are crucial for bracket adhesion.
  • Understanding fluoride release is vital for assessing anticariogenic potential.
  • Previous research indicates varying fluoride release profiles among different materials.

Purpose of the Study:

  • To quantify and compare fluoride ion release over time from four orthodontic bonding materials.
  • To evaluate the influence of storage medium (distilled water vs. artificial saliva) on fluoride release.
  • To determine if fluoride release rates are sufficient to inhibit enamel demineralization.

Main Methods:

  • Four orthodontic bonding materials (Assure, Fuji Ortho LC, Python, Transbond XT) were tested.

Related Experiment Videos

  • Specimens were stored in distilled water and artificial saliva at 37°C for six months.
  • Fluoride release was measured using an ion-specific electrode at periodic intervals.
  • A secondary test assessed fluoride release from Assure after one year of storage.

    • Main Results:

    • Initial fluoride release was highest for Assure, followed by Fuji Ortho LC, Python, and Transbond XT.
    • Fluoride release rates decreased over time but remained stable.
    • After six months, Fuji Ortho LC showed the highest cumulative release, followed by Assure, Python, and Transbond XT.
    • Storage medium did not significantly impact fluoride release.
    • Fluoride release from Assure remained above the inhibitory level for enamel decalcification even after prolonged storage.

    Conclusions:

    • All three fluoride-containing orthodontic bonding materials demonstrated fluoride release rates theoretically capable of inhibiting enamel decalcification.
    • Fuji Ortho LC and Assure exhibited higher fluoride release compared to Python and Transbond XT over the six-month period.
    • The storage medium had a minimal effect on fluoride release rates.
    • Continued fluoride release suggests a sustained anticariogenic benefit from these materials.