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Morphological structure of the three-dimensional (3-D) printed polycaprolactone-hydroxyapatite (PCL-HA) scaffold. (A) Digital photo of the scaffold with a 0°, 60°, and 120° deposition angle. (B) Scanning electron microscopy (SEM) image of the morphology of the three-dimensional (3-D) printed PCL-HA scaffold (top view). Scale bar=2 mm.
