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Related Experiment Videos

Are the flowable composites suitable for orthodontic bracket bonding?

Tancan Uysal1, Zafer Sari, Abdullah Demir

  • 1Selcuk Universitesi Dis Hekimligi Fakultesi Orthodontics, Konya, Turkey. tancanuysal@selcuk.edu.tr

The Angle Orthodontist
|November 9, 2004
PubMed
Summary

This study compared the shear bond strength (SBS) of flowable composites versus a conventional orthodontic adhesive. Flowable composites demonstrated significantly lower SBS, making them unsuitable for orthodontic bracket bonding.

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Area of Science:

  • Dental Materials Science
  • Orthodontics
  • Biomaterials

Background:

  • Flowable composites are increasingly used in dentistry.
  • Their suitability for orthodontic bracket bonding requires evaluation.
  • Conventional orthodontic adhesives are the current standard.

Purpose of the Study:

  • To compare the shear bond strength (SBS) of three flowable composites against a conventional orthodontic adhesive.
  • To analyze bond failure sites using the Adhesive Remnant Index (ARI).

Main Methods:

  • Eighty extracted human premolars were divided into four groups.
  • Brackets were bonded using Transbond XT (control), Pulpdent Flows-Rite, 3M Filtek Flow, or Heraeus Kulzer Flow Line.
  • Shear bond strength was measured using a universal testing machine.

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  • Adhesive Remnant Index (ARI) scores were assessed post-debonding.

    • Main Results:

    • Conventional orthodontic adhesive (Transbond XT) showed significantly higher SBS (17.10 MPa) compared to flowable composites (6.60-8.53 MPa).
    • Statistically significant differences in SBS were observed among all groups (P < .05).
    • ARI scores also differed significantly between the orthodontic adhesive and flowable composite groups.

    Conclusions:

    • Flowable composites exhibit significantly lower shear bond strength than conventional orthodontic adhesives.
    • The use of flowable composites is not recommended for orthodontic bracket bonding due to insufficient bond strength.
    • Further research may explore modified flowable materials for potential orthodontic applications.