Interfacial ultrastructure of the experimental 2 bottle 1 step self-etching primer resin bonding system

• Published in: Adhesive Dentistry Vol. 22; no. 1; pp. 7 - 12
• Main Authors: KONDO, Masaya, MORIGAMI, Makoto, SUGIZAKI, Jumpei, YAMADA, Toshimoto
• Format: Journal Article
• Language: Japanese
• Published: Japan Society for Adhesive Dentistry 2004
• Subjects: interface; resin bonding system; self-etching adhesive
• ISSN: 0913-1655; 2185-9566
• DOI: 10.11297/adhesdent1983.22.7

A newly designed two-bottle/one-step resin bonding system (SI-IB551) containing 6-MHPA as an adhesion promoting monomer was developed by Shofu. The aim of this study was to observe the interfacial ultrastructure of the experimental bonding system by means of the Ar ion beam etching under the FE-SEM. The experimental flowable resin composite (SI-BF-2001-HF) was bonded to the flat enamel/dentin surfaces or dentin cavities after caries removal of the human extracted molars using this system. In a routine technique, the specimens were cut half, embedded in an epoxy resin, polished and then the resin-tooth interface was observed after Ar ion beam etching for 35sec under the FE-SEM. This new experimental bonding system showed the tight interfacial junction to enamel/dentin/cariesaffected dentin, but the decalcified dentin layer produced by the self-etching adhesive was very thin and the hybrid structure was not clearly observed in the superficial dentin layer. We thought that this resin bonding system might be promising for clinical use.