Effects of a combined application of potassium oxalate gel/adhesive agent on dentin permeability in vitro.

Abstract

PURPOSE:

To test the effects of sequential application of potassium oxalate gel/adhesive agent on in vitro dentin permeability.

MATERIALS AND METHODS:

Full crown preparations were made in extracted human molars to expose deep coronal dentin. The roots and pulp were removed and the resulting crown segments were connected to a special device (Flodec) to permit the measurement of the permeability of the specimens before and after treatments. Minimum and maximum permeability were recorded after smear layer and phosphoric acid treatment. A new smear layer was created and the permeability measured after the crowns were bonded with Single Bond (3M ESPE), One-Up Bond F (Tokuyama), and AdheSE (Ivoclar Vivadent), either according to manufacturer's instructions or after treating the acid-etched dentin with a 3 wt% potassium oxalate gel. The results were expressed as a percentage of maximum permeability values. Impressions and epoxy resin replicas from the crown segments were produced for SEM examination.

RESULTS:

None of the adhesives were able to eliminate the fluid flow through dentin. Two-way ANOVA revealed that the application of potassium oxalate prior to the bonding procedures was the most effective technique in reducingthe dentin permeability (p < 0.05), regardless of the adhesive used. SEM micrographs showed that transudation of dentinal fluid could be identified on the surfaces of all replicas.

CONCLUSION:

The use of potassium oxalate gel was effective in reducing the permeability of bonded dentin.

• Authors: Safira Marques de Andrade e Silva, Luiz Marquezini Jr, Adriana Pigozzo Manso, Fernanda Pimentel Garcia, Marcela Rocha de Oliveira Carrilho, David Henry Pashley, Franklin Russel Tay, Ricardo Marins Carvalho
• Journal: The journal of adhesive dentistry (J Adhes Dent) Vol. 9 Issue 6 Pg. 505-12 (Dec 2007) ISSN: 1461-5185 [Print] Germany
• PMID: 18265707 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)

Chemical References

• Acrylic Resins
• AdheSE cement
• Dentin-Bonding Agents
• Gels
• Methacrylates
• One-Up-Bond F
• Oxalates
• Phosphoric Acids
• Reducing Agents
• single bond
• Bisphenol A-Glycidyl Methacrylate
• phosphoric acid

Topics

• Acid Etching, Dental
• Acrylic Resins (chemistry)
• Bisphenol A-Glycidyl Methacrylate (chemistry)
• Crowns
• Dental Bonding
• Dentin (drug effects, ultrastructure)
• Dentin Permeability (drug effects)
• Dentin-Bonding Agents (pharmacology)
• Dentinal Fluid (drug effects)
• Gels
• Humans
• Materials Testing
• Methacrylates (chemistry)
• Microscopy, Electron, Scanning
• Oxalates (pharmacology)
• Phosphoric Acids (pharmacology)
• Reducing Agents (pharmacology)
• Smear Layer
• Surface Properties
• Tooth Preparation, Prosthodontic