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Cavity disinfectants and dentin bonding

J C Meiers1, J C Kresin

  • 1University of Connecticut School of Dental Medicine, Department of Restorative Dentistry and Endodontology, Farmington 06030, USA.

Operative Dentistry
|July 1, 1996
PubMed
Summary
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The study found that a chlorhexidine cavity wash did not impact microleakage in composite restorations. However, an I2-KI/CuSO4 wash significantly increased microleakage with the Syntac bonding system.

Area of Science:

  • Dental Materials Science
  • Restorative Dentistry

Background:

  • Microleakage is a significant concern in composite restorations, potentially leading to secondary caries and restoration failure.
  • Cavity disinfectants are sometimes used to reduce bacterial contamination before applying dentin bonding systems.

Purpose of the Study:

  • To evaluate the impact of two different cavity disinfectants on the microleakage of class 5 composite restorations.
  • To assess the interaction between chlorhexidine-based and I2-KI/CuSO4-based disinfectants with two dentin bonding systems (Tenure and Syntac).

Main Methods:

  • Class 5 cavities were prepared on extracted molars with mixed enamel and cementum margins.
  • Restorations were treated with Tenure or Syntac, with or without disinfectant washes, and filled with Tetric composite.
  • Samples underwent thermocycling, staining, and sectioning to quantify dye penetration (microleakage).

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Main Results:

  • The chlorhexidine-based wash showed no significant difference in microleakage compared to controls using Tenure or Syntac alone.
  • The I2-KI/CuSO4-based wash, when used with the Syntac bonding system, resulted in significantly increased gingival microleakage.
  • No significant effect on occlusal (enamel) margins was noted for either disinfectant.

Conclusions:

  • The interaction between cavity disinfectants and dentin bonding systems is material-specific.
  • The I2-KI/CuSO4-based disinfectant may compromise the sealing ability of the Syntac bonding system in class 5 restorations.
  • Further research is needed to understand the compatibility of various cavity disinfectants with contemporary dentin bonding agents.