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Related Experiment Videos

Microleakage in Class 2 composite resin restorations

K Derhami1, P Coli, M Brännström

  • 1Department of Oral Pathology, Karolinska Institute, School of Dentistry, Huddinge, Sweden.

Operative Dentistry
|May 1, 1995
PubMed
Summary

This study investigated dental bonding systems and microleakage in resin restorations. Replacing the standard conditioner with a mild detergent did not prevent cervical gap formation in class 2 restorations.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials

Background:

  • Microleakage is a significant challenge in class 2 resin restorations.
  • Dentin bonding systems (DBS) aim to minimize interfacial gaps.
  • Citric acid is used in some dentin conditioning protocols.

Purpose of the Study:

  • To evaluate the microleakage of class 2 resin restorations using two dentin bonding systems.
  • To compare the effect of a 10% citric acid dentin conditioner versus a modified conditioner (0.2% EDTA and 1% NaF).

Main Methods:

  • Dye penetration method was employed to assess microleakage.
  • Class 2 cavities were restored using two different dentin bonding systems.
  • Dentin conditioning involved either the manufacturer's 10% citric acid or a substitute detergent.

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Main Results:

  • Neither dentin bonding system completely prevented cervical gap formation.
  • Replacing the manufacturer's conditioner with the EDTA/NaF detergent yielded comparable microleakage results.
  • Microleakage was observed at the cervical margin in both conditioning groups.

Conclusions:

  • The tested dentin bonding systems, even with a modified conditioner, did not fully eliminate microleakage in class 2 restorations.
  • The alternative conditioner containing EDTA and NaF did not significantly alter the microleakage compared to the citric acid conditioner.
  • Further research is needed to improve dentin bonding and reduce microleakage in posterior composite restorations.