The acid-base resistant zone in three dentin bonding systems

Go Inoue, Toru Nikaido, Richard M. Foxton, Junji Tagami

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

An acid-base resistant zone has been found to exist after acid-base challenge adjacent to the hybrid layer using SEM. The aim of this study was to examine the acid-base resistant zone using three different bonding systems. Dentin disks were applied with three different bonding systems, and then a resin composite was light-cured to make dentin disk sandwiches. After acid-base challenge, the polished surfaces were observed using SEM. For both one- and two-step self-etching primer systems, an acid-base resistant zone was clearly observed adjacent to the hybrid layer - but with differing appearances. For the wet bonding system, the presence of all acid-base resistant zone was unclear. This was because the self-etching primer systems etched the dentin surface mildly, such that the remaining mineral phase of dentin and the bonding agent yielded clear acid-base resistant zones. In conclusion, the acid-base resistant zone was clearly observed when self-etching primer systems were used, but not so for the wet bonding system.
Original languageEnglish
Pages (from-to)717 - 721
Number of pages5
JournalDental Materials Journal
Volume28
Issue number6
Publication statusPublished - 2009

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