Enamel-Smear Compromises Bonding by Mild Self-Etch Adhesives

In light of the increased popularity of less acidic, so-called ‘ultra-mild’ self-etch adhesives, adhesion to enamel is becoming more critical. It is hypothesized that this compromised enamel bonding should, to a certain extent, be attributed to interference of bur debris smeared across enamel during...

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Bibliographic Details
Published in:Journal of dental research 2010-12, Vol.89 (12), p.1505-1509
Main Authors: Mine, A., De Munck, J., Cardoso, M. Vivan, Van Landuyt, K.L., Poitevin, A., Kuboki, T., Yoshida, Y., Suzuki, K., Van Meerbeek, B.
Format: Article
Language:English
Subjects:
Acid Etching, Dental - methods
Biological and medical sciences
Carbon Compounds, Inorganic - chemistry
Crystallography
Dental Bonding
Dental Cavity Preparation - instrumentation
Dental Cements - chemistry
Dental Enamel - ultrastructure
Dental High-Speed Equipment
Dentin-Bonding Agents - chemistry
Dentistry
Diamond - chemistry
Durapatite - chemistry
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Humans
Materials Testing
Maxillofacial surgery. Dental surgery. Orthodontics
Medical sciences
Microscopy, Electron, Transmission
Resin Cements - chemistry
Silicates - chemistry
Silicon Compounds - chemistry
Smear Layer
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Temperature
Water - chemistry
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Summary:In light of the increased popularity of less acidic, so-called ‘ultra-mild’ self-etch adhesives, adhesion to enamel is becoming more critical. It is hypothesized that this compromised enamel bonding should, to a certain extent, be attributed to interference of bur debris smeared across enamel during cavity preparation. High-resolution transmission electron microscopy revealed that the enamel smear layer differed not only in thickness, but also in crystal density and size, depending on the surface-preparation method used. Lab-demineralization of sections clearly disclosed that resin-infiltration of an ultra-mild self-etch adhesive progressed preferentially along micro-cracks that were abundantly present at and underneath the bur-cut enamel surface. The surface-preparation method significantly affected the nature of the smear layer and the interaction with the ultra-mild adhesive, being more uniform and dense for a lab-SiC-prepared surface vs. a clinically relevant bur-prepared surface.
ISSN:0022-0345
1544-0591
DOI:10.1177/0022034510384871