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Effect of Er:YAG Laser Treatment on the Microstructure of the Dentin/Adhesive Interface After Acid-Base Challenge.
- Source :
- Journal of Adhesive Dentistry; 2007, Vol. 9 Issue 6, p513-520, 8p, 9 Black and White Photographs, 2 Diagrams, 2 Charts, 1 Graph
- Publication Year :
- 2007
-
Abstract
- Purpose: The aim of this study was to evaluate the effect of Er:YAG laser ablation on the microstructure of the dentin/adhesive interface after acid-base challenge in vitro. Materials and Methods: Thirty-two extracted third molars were used. One pair of disk-shaped specimens was obtained from the midcoronal dentin of each tooth. One surface in each pair was subjected to Er:YAG laser irradiation, while the other was ground using 600-grit SiC abrasive paper. The specimens were assigned to 4 groups with 8 pairs in each group. A self-etching primer (Clearfil SE-Bond), a bonding adhesive (Clearfil SE-Bond), and a photocuring composite (Clearfil APX) were applied according to manufacturer's instructions to create dentin-resin "sandwiches" of each pair, except in group IV, where no primer was applied. The specimens were stored in demineralizing solution for 20 min in groups I and IV, 60 min in group II, and 120 min in group III. After immersion in 5% NaOCl, all the specimens were polished and argon-ion etched. Finally, the interfaces between the dentin and bonding agent were observed under a scanning electron microscope. Results: All specimens in groups I to III showed an acid-base resistant zone, except those of group IV, which debonded completely. A statistically significant difference was found in the thickness of the acid-base resistant zone between group I vs groups II and III for both abraded and Er:YAG-irradiated surfaces. There was no statistically significant difference in the thickness of the acid-base resistant zone between groups II and III for both conventionally prepared and Er:YAG-irradiated surfaces. Conclusion: The existence of an acid-base resistant zone following the application of the SE Bond system on both abraded and Er:YAG-lased human dentin, regardless of the acid-base challenge duration, was confirmed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14615185
- Volume :
- 9
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Adhesive Dentistry
- Publication Type :
- Academic Journal
- Accession number :
- 36852005