| 0528 SEM Observation of the Resin-Dentin Interface by All-in-one Adhesive Systems | ||
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T. MASEKI, T. NITTA, A. SHIROTA, H. MITSUYASU, T. KIMISHIMA, and Y. NARA, Nippon Dental University, Tokyo, Japan Objectives: Resin adhesive systems have been improved, and simplified the pretreatment method. All-in-one adhesive systems have been developed recently and used in clinical situations. The purpose of this study was to investigate the resin-dentin interface formed by various all-in-one adhesive systems under FE-SEM observation. Methods: Coronal dentin surfaces of extracted human third molars were polished with a series of SiC paper to 800 grit. The polished sound dentin surface was partially coated with an etching protector belt-likely, in order to investigate the position of the hybrid layer relative to the untreated dentin surface. Dentin specimens were treated by 4 all-in-one adhesive systems, Adper Prompt L-Pop Self-Etch Adhesive (APL; 3M ESPE), AQ Bond Plus (AQP; Sunmedical), G-Bond (GBN; GC), and Shake One (SIB; Shofu) according to the manufacturer's instructions. Those specimens were sectioned vertically, and the resin-dentin interface was polished with aluminum polishing powder. The polished specimens were treated with 10% hypochlorite solution at 60 sec and then observed under FE-SEM (Hitachi S-4000). The thickness of hybrid layer was measured by a standard microscale calibrated FE-SEM. Results: The thickness of the hybrid layer was varied with the systems. The mean values of the thickness of the hybrid layer were AQP; 0.68(0.12), GBN; 0.70(0.12), SIB; 0.87(0.30), APL; 1.73(0.51) micrometer (SD). There was a significant difference in the thickness of the hybrid layer between APL and AQP, GBN at p<0.01. And there was a significant difference in the thickness of the hybrid layer between APL and SIB at p<0.05 (ANOVA and q-test). The gap was not observed at the interface underneath the hybrid layer of all specimens. Conclusion: It could be considered that the properties of all-in-one adhesive systems, i.e., decalcification, permeation, have influenced on the resin-dentin interface. | ||
| Seq #84 - SEM, Morphology, Hybrid Layer 2:00 PM-4:00 PM, Thursday, 10 March 2005 Baltimore Convention Center Exhibit Hall E-F | ||
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