Safranin O staining of specimens harvested after 1 month.

<p>Acellular constructs (<i>A</i>) and cellular constructs (<i>C</i>) demonstrated evidence of a thin capsule containing spindle-shaped, fibroblast-appearing cells (<i>star</i>). Although the acellular constructs were invaded by mononuclear cells, there was no evidence of cartilage deposition (<i>B</i>). Cellular constructs demonstrated marked cartilage deposition by lacunar chondrocytes (<i>arrows</i>) throughout the construct (<i>B</i>, <i>D</i>). <i>Scale bar = 100 µm</i>.