Fig. 4
From: Polymer-free dual drug-eluting stents evaluated in a porcine model
a Scanning electron microscopy (SEM) image at 14-day (×18). BMS: Bare-Metal Stents; PrES: Probucol-Eluting Stents; SES: Sirolimus-Eluting Stents; DDES: Dual Drug-Eluting Stents. b Scanning electron microscopy (SEM) image at 28-day (×18). BMS: Bare-Metal Stents; PrES: Probucol-Eluting Stents; SES: Sirolimus-Eluting Stents; DDES: Dual Drug-Eluting Stents. c Scanning electron microscopy (SEM) image at 28-day in the BMS group (×130). Black rectangle represents the region of d. d Scanning electron microscopy (SEM) image at 28-day in BMS group (×600). Black circle represents smooth muscle cells without extracellular matrix and endothelial cells. White circle represents the site completely covered by endothelial cells. Hexagrams represent extracellular matrix. e Scanning electron microscopy (SEM) image at 28-day in the PrES group (×18 left) and ×1000 right). White rectangles in the left image represent the area of the right image that is covered by endothelial cells, except for a small amount of extracellular matrix