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Adhesion between collagen depleted dentin and dentin adhesives
1Dept. Operative Dentistry, Tokyo Medical and Dental University, Faculty of Dentistry, Bunkyo-ku, Japan. n.inai.odnt@dent.tmd.ac.jp
American Journal of Dentistry
|November 21, 1998
Summary
Sodium hypochlorite treatment of dentin, particularly after etching, can enhance shear bond strength with certain bonding agents. This suggests improved interaction with the mineralized dentin surface.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Adhesive dentistry
Background:
- Dentin surface treatment is crucial for effective adhesion of dental restorative materials.
- Sodium hypochlorite is commonly used for disinfection but its effect on dentin bond strength requires further investigation.
Purpose of the Study:
- To evaluate the impact of sodium hypochlorite treatment on dentin's shear bond strength.
- To analyze the morphological changes in dentin and bonding interfaces after treatment.
Main Methods:
- Comparison of shear bond strengths using various dentin bonding agents.
- Application of specific surface treatments: manufacturer's directions, etching followed by sodium hypochlorite, and sodium hypochlorite alone.
- Morphological analysis of treated dentin and bonding interfaces via Field Emission Scanning Electron Microscopy (FE-SEM).
Main Results:
- Acetone-containing bonding systems showed equivalent or increased shear bond strength when sodium hypochlorite was applied post-etching.
- These results suggest enhanced interaction between the adhesive and the high-mineral-content dentin surface.
Conclusions:
- Sodium hypochlorite treatment, when combined with etching, can positively influence the bond strength of specific dentin bonding agents.
- The findings indicate a potential for improved adhesive performance through optimized dentin surface modification.