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SEM qualitative evaluation of four self-etching adhesive systems
L Giachetti1, C Bambi, D Scaminaci Russo
1Department of Dentistry and Stomatology, University of Florence, Florence, Italy. l.giachetti@odonto.unifi.it
Minerva Stomatologica
|October 8, 2005
Summary
Self-etching adhesives offer simplified dental bonding, showing good adhesion to dentin. However, their effectiveness on enamel varies, performing well on prepared surfaces but less reliably on unprepared enamel.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials
Background:
- Self-etching adhesives simplify dental procedures by combining multiple steps.
- These adhesives aim to reduce technique sensitivity and errors in restorative dentistry.
- Simultaneous etching and infiltration by the resin minimize discrepancies.
Purpose of the Study:
- To evaluate the bonding quality of four self-etching adhesives.
- Assessment was performed on both dentin and enamel substrates.
- Scanning Electron Microscopy (SEM) was utilized for analysis.
Main Methods:
- Twenty caries-free molars were sectioned into coronal and radicular fragments.
- Fragments were randomly assigned to five groups, with one self-etching adhesive per group.
- Interfaces (ground/unground enamel-adhesive, dentin-adhesive) were prepared and examined via SEM.
Main Results:
- Gaps were frequently observed at the interface between the substratum and restoration.
- Etching was satisfactory on ground enamel but poor on unground enamel.
- Adequate hybrid layer formation and resin tag presence were noted in dentin bonding.
Conclusions:
- Self-etching adhesives demonstrate adequate adhesion to dentin.
- Encouraging results were observed on ground enamel.
- Dependability on unground enamel remains a concern for these adhesive systems.
