Fig. 1.

Representative histological images of nitrided iron scaffold and Vision stent in porcine coronary artery (HE staining). No destruction or loss of vascular lamina was observed in either group. All cell response except macrophages and plasma cells were not significantly different between groups throughout 52 weeks follow up. Nitrided iron scaffold: (A) 4 weeks, (B) 12 weeks, (C) 26 weeks, and (D) 52 weeks ( × 40); (E–H) an enlargement of the rectangular area in (A–D) ( × 100). Vision stent: (I) 4 weeks, (J) 12 weeks, (K) 26 weeks, and (L) 52 weeks ( × 40); (M − P) an enlargement of the rectangular area in (I–L) ( × 100).