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Related Experiment Videos

Bond failure patterns in vivo.

Rognvald A Linklater1, Peter H Gordon

  • 1Orthodontic Department, Edinburgh Dental Institute, Lauriston Place, Edinburgh EH3 9YW, Scotland, United Kingdom. linctus@waitrose.com

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|May 17, 2003
PubMed
Summary
This summary is machine-generated.

Orthodontic bracket bond failures occurred more often on mandibular and posterior teeth than on other teeth. This study suggests laboratory bond strength tests may not accurately predict clinical outcomes in patients.

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Area of Science:

  • Dentistry
  • Orthodontics
  • Biomaterials

Background:

  • Orthodontic bracket debonding is a common clinical issue.
  • Understanding factors influencing bond failure is crucial for treatment success.
  • Previous ex vivo studies on bond strength may not fully represent clinical performance.

Purpose of the Study:

  • To investigate in vivo bond failure patterns of orthodontic brackets across different tooth types.
  • To evaluate the clinical relevance of ex vivo bond strength testing.
  • To analyze the influence of tooth type and attachment on bond survival.

Main Methods:

  • Survival analysis of in vivo bond failure data from 108 orthodontic patients.
  • Recording time to first bond failure or censorship for each attachment.
  • Utilizing the no-mix orthodontic composite adhesive Right-On.

Main Results:

  • Overall failure rates aligned with previous clinical observations.
  • Mandibular and posterior teeth exhibited significantly higher failure rates compared to maxillary and anterior teeth.
  • The type of attachment significantly impacted bond survival.

Conclusions:

  • In vivo bond survival of orthodontic brackets is not uniform across all teeth.
  • Ex vivo bond strength testing may not be a reliable predictor of clinical performance.
  • Tooth type and attachment are significant factors in orthodontic bond longevity.