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Related Experiment Videos

Effect of impression technique on bond strength.

Jiaping Su1, Ross S Hobson, John F McCabe

  • 1No 3 Hospital of Suzhou, People's Republic of China.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|January 14, 2004
PubMed
Summary

Polyether impression material can replicate enamel surfaces without negatively impacting bracket bond strength. This method is suitable for studying enamel preparation effects on dental bonding.

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Area of Science:

  • Dental Materials Science
  • Orthodontic Adhesion Research

Background:

  • Investigating enamel surface preparation requires reliable methods for surface replication without compromising bond strength.
  • Accurate surface replication is crucial for correlating preparation techniques with subsequent adhesive performance in dentistry.

Purpose of the Study:

  • To evaluate the effect of two impression materials (silicone and polyether) on bracket bond strength to etched enamel.
  • To determine if surface replication methods influence the assessment of enamel preparation techniques on bond strength.

Main Methods:

  • Mandibular incisors were acid-etched, and impressions were taken using silicone or polyether material before bracket bonding.
  • A control group received no impression.
  • Bond strength was measured using a universal testing machine, and the adhesive remnant index (ARI) was recorded.

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Main Results:

  • Silicone impression material significantly reduced bond strength (8.6 MPa) compared to the control group (21.2 MPa).
  • Polyether impression material showed no significant difference in bond strength (19.1 MPa) compared to the control group.
  • Both silicone and polyether accurately replicated surface details.

Conclusions:

  • Polyether impression material is suitable for enamel surface replication prior to bonding without compromising bond strength.
  • This technique enables further investigation into the relationship between enamel preparation methods and the bond strength of orthodontic brackets.