Fig. 4From: Nickel ion release and surface analyses on instrument fragments fractured beyond the apex: a laboratory investigationThe representative scanning electron micrographs of the groups following 7-day immersion in SBF. A; Stainless-steel hand instrument, B; miniSCOPE NiTi instrument, C; Rotate NiTi instrument, D; HyflexCM NiTi instrument, E; OneCurve NiTi instrument, F; ProTaperNext NiTi instrument. NiTi: nickel-titaniumBack to article page