An In Situ Evaluation of the Protective Effect of Nano Eggshell/Titanium Dioxide against Erosive Acids

Figure 4

FESEM images of (a) unexposed tooth; (b) after exposure to HCI; (c) after exposure to HCI + Colgate toothpaste; (d) after exposure to HCI + Sensodyne; (e) after exposure to HCI + EB@TiO₂.

(a)

(b)

(c)

(d)

(e)