1. Resin-enamel bonds made with self-etching primers on ground enamel.
- Author
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Hashimoto M, Ohno H, Yoshida E, Hori M, Sano H, Kaga M, and Oguchi H
- Subjects
- Adhesives, Humans, Image Processing, Computer-Assisted, Materials Testing, Methacrylates chemistry, Microscopy, Electron, Microscopy, Electron, Scanning, Resin Cements chemistry, Surface Properties, Tensile Strength, Dental Bonding, Dental Enamel ultrastructure, Dental Etching, Dentin-Bonding Agents chemistry
- Abstract
Self-etching primer adhesives have recently been introduced to simplify bonding. However, the fundamental bonding mechanism of self-etching primers to enamel is not yet fully understood. This study aimed to investigate resin-enamel bonds of self-etching primer adhesives on ground enamel. Two self-etching primer adhesives (Clearfil Liner Bond 2 V and Clearfil SE Bond) were used in this study. A total-etch adhesive (One-Step) was used as a control. Resin-enamel beams were subjected to the microtensile bond test. Subsequently, the failure modes of all specimens were quantified using image analysis. Undemineralized and demineralized ultrathin sections of the resin-enamel bonded specimens were examined using transmission electron microscopy. The bond strengths of Clearfil SE Bond (39.8 +/- 11.9 MPa) and One-Step (46.2 +/- 12.7 MPa) were significantly greater than that of Clearfil Liner Bond 2V (30.4 +/- 6.2 MPa). Scanning electron microscopy of the fractured surfaces revealed the failure direction and weakest portion within each bond. Transmission electron microscopy showed a thin hybridized complex of resin in enamel produced by the self-etching primers without the usual micrometer-sized resin tags seen in resin-enamel bonds produced using the total-etch adhesive. The morphological features of the resin-enamel bonds produced by two self-etching primers tested were different from that created with the total-etch adhesive.
- Published
- 2003
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