Nano-Hydroxyapatite Gel and Its Effects on Remineralization of Artificial Carious Lesions

Figure 4

The scanning electron photomicrograph (SEM, x2K) of the demineralized surface of enamel, showing outlines of enamel prism/rod with the remnant of interprismatic enamel (yellow arrow) (a), followed by remineralization with fluoride varnish, showing incomplete filling of the porosities (yellow arrow) (b), nano-hydroxyapatite toothpaste (c), 20% nano-hydroxyapatite gel (d), 30% nano-hydroxyapatite gel (e) compared to no treatment group (f).

(a)

(b)

(c)

(d)

(e)

(f)