Fig. 5
From: The effect of fluoride iontophoresis on seal ability of self-etch adhesive in human dentin in vitro
A–H Scanning electron micrographs of longitudinal views of human dentin (original magnification X3000). A–D Intact dentin; E–H caries affected dentin; A, E smear layer covered dentin and no treatment; B, F with self-etch adhesive treatment; C, G with fluoride iontophoresis; D, H with fluoride iontophoresis and adhesive treatment. Arrow heads showing bundle precipitates formed within dentinal tubules of intact dentin with fluoride iontophoresis