Oberlaender, Heinrich and Friedl, Karl-Heinz and Schmalz, Gottfried (2001) Bond strength of polyacid-modified resins using a new one-step adhesive system. OPERATIVE DENTISTRY, 26 (2). pp. 127-133. ISSN 0361-7734, 1559-2863
Full text not available from this repository.Abstract
During the last few years a number of one-bottle adhesive systems have been developed. However, no "universal" adhesive system recommended for use with different polyacid-modified resins (PMR) is currently available. This study compared the shear bond strengths of four PMR Dyract AP (D), Compoglass F (C), F 2000 (F) and Hytac (H)) to enamel and dentin using (1) the adhesive system provided by the manufacturer and (2) a new one-step "universal" adhesive system (Prompt L-Pop). Seventy enamel and 70 dentin-surfaces were prepared for 10 replications of each bonding combination (C1, C2, D1, D2, F1, F2, H1/2). After the bonding procedure and subsequent storage of the specimens in distilled water at 37 degreesC for 24 hours, shear bond strengths were determined using a Universal Testing Machine at a cross-head speed of 0.75 mm min(-1) until failure occurred. Fracture modes were examined at 25x magnification under a light microscope. The median shear bond strength values (MPa) to enamel were 13.2 (C1), 16.5 (C2), 17.7 (D1), 41.2 (D2), 12.7 (F1), 41.2 (F2), 33.9 (H1/2); to dentin, values of 3.3 (C1), 3.7 (C2), 7.4 (D1), 12.2 (D2), 11.4 (F1), 8.6 (F2) and 4.6 (H1/2) were measured. In both enamel and dentin, bond strengths of the tested PMR were either not significantly different or significantly higher using the universal adhesive system compared to the adhesive systems provided by the manufacturers. Bond strengths to enamel and dentin were not significantly different from each other in D and F with their corresponding adhesive system. In all other groups, bond strengths to enamel were significantly higher compared to dentin. Failure modes were mostly adhesive in dentin and mixed adhesive/ cohesive in enamel. SEM observations revealed similar hybrid layer and tag formation in dentin for the four adhesive systems. On enamel, a clearly visible etch pattern was detected only for the universal adhesive system. In conclusion, the universal adhesive system achieved equal or higher bond strengths of the tested PMR to enamel. and dentin compared to the adhesive systems provided by the manufacturers.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHENYL-P; DENTIN; ENAMEL; PRIMER; INFILTRATION; COMPOSITE; WATER; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Feb 2022 09:33 |
| Last Modified: | 14 Feb 2022 09:33 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41720 |
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