Characterization of S-PRG nanofiller coated dentin. (A) SEM micrographs and EDX intensity of S-PRG nanofiller coated or uncoated dentin block surfaces. Scale bar = 10 μm. (B) Amount of released ions from S-PRG nanofiller coated dentin (n = 3, mean ± SD). EDX, energy dispersive X-ray spectrometry; SD, standard deviation; SEM, scanning electron microscopy; S-PRG, surface pre-reacted glass-ionomer.