Fig. 5
From: Biocompatibility of nanosilver-coated orthodontic brackets: an in vivo study

a The sample of the control group at day 14. b The sample of the study group at day 14 , 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 14. b The sample of the study group at day 14 , brown-black granules (encircled) (H&E; a, b ×200)