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Related Experiment Video

Updated: Jun 22, 2026

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
08:40

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives

Published on: May 17, 2020

Bond failure rates with a self-etching primer: a randomized controlled trial.

Julio Pedra e Cal-Neto1, Cátia Abdo Quintão, Marco Antônio de Oliveira Almeida

  • 1Department of Orthodontics, Fluminense Federal University, Nova Friburgo, Rio de Janeiro, Brazil. juliocalneto@yahoo.com.br

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|June 16, 2009
PubMed
Summary

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This clinical trial compared a self-etching system (SEP) with a conventional system (TBXT) for orthodontic bonding. Both systems demonstrated low bond failure rates, indicating their adequacy for clinical use.

Area of Science:

  • Orthodontics
  • Dental Materials Science
  • Clinical Dentistry

Background:

  • Orthodontic bracket bonding relies on adhesive systems.
  • Evaluating novel self-etching systems (SEP) against conventional multi-step systems (TBXT) is crucial for improving clinical efficiency and outcomes.

Purpose of the Study:

  • To compare the 12-month performance of a self-etching system (SEP) versus a conventional multi-step system (TBXT) for orthodontic bracket bonding.

Main Methods:

  • A randomized clinical trial involving 28 patients and 548 bonded brackets.
  • Kaplan-Meier analysis estimated bracket survival rates.
  • Log-rank tests compared survival based on bonding procedure, tooth location, arch, and sex.

Main Results:

Related Experiment Videos

Last Updated: Jun 22, 2026

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
08:40

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives

Published on: May 17, 2020

  • Failure rates were 4.78% for TBXT and 6.88% for SEP, with no significant difference between systems (P = 0.311).
  • Posterior brackets showed a higher failure rate than anterior brackets (P = 0.013).
  • Tooth location was the only significant factor influencing bracket survival.

Conclusions:

  • Both self-etching (SEP) and conventional (TBXT) systems exhibit low bond failure rates.
  • Both adhesive systems are suitable for orthodontic bonding applications.
  • Posterior tooth location is a risk factor for bracket debonding.