Fig. 3
From: Biocompatibility of nanosilver-coated orthodontic brackets: an in vivo study

a The sample of the control group at day 7. b The sample of the study group at day 7, brown-black granules (encircled) (H&E; a, b ×200)
From: Biocompatibility of nanosilver-coated orthodontic brackets: an in vivo study
a The sample of the control group at day 7. b The sample of the study group at day 7, brown-black granules (encircled) (H&E; a, b ×200)