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Bonding to root caries by a self-etching adhesive system containing MDPB.
Junichi Doi1, Toshiyuki Itota, Masahiro Yoshiyama
1Department of Operative Dentistry, Study of Biofunctional Recovery and Reconstruction, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan. j_doi@md.okayama-u.ac.jp
American Journal of Dentistry
|May 21, 2004
Summary
This study evaluated an antibacterial fluoride-releasing adhesive system (ABF) for bonding to carious and normal dentin. While bond strength was lower in carious dentin, ABF shows potential for preventing secondary caries.
Area of Science:
- Dental Materials Science
- Cariology
- Adhesive Dentistry
Background:
- Root caries presents a significant challenge in restorative dentistry.
- Antibacterial and fluoride-releasing dental adhesives offer a promising approach to manage caries progression.
- Evaluating the bonding efficacy of such systems to compromised dentin is crucial.
Purpose of the Study:
- To assess the bond strength of an experimental antibacterial fluoride-releasing adhesive system (ABF) to normal and carious dentin.
- To investigate the interfacial characteristics of the adhesive on different dentin substrates.
Main Methods:
- Human bicuspids with root caries were prepared, exposing normal and carious dentin surfaces.
- The experimental ABF was applied, followed by resin composite restoration.
- Microtensile bond strength testing, SEM, and TEM were employed to analyze the bonded interfaces.
Main Results:
- Bond strengths to caries-affected and caries-infected dentin were significantly lower than to normal dentin.
- SEM revealed more porous hybrid layers in carious dentin compared to normal dentin.
- TEM showed bacteria embedded within the adhesive monomer in caries-infected dentin.
Conclusions:
- The ABF adhesive system exhibits reduced bond strength to root carious dentin compared to normal dentin.
- However, its antibacterial and fluoride-releasing properties may help prevent caries progression and secondary caries formation.