FIG. 4.

The 3D construct shows the typical aspect of artificial epithelial replacements, both the oral and skin part, as observed in the magnified images. It should be noted however that the transitional area/vermillion cannot be identified solely using hematoxylin and eosin and it was necessary to identify its approximate location using the keratin markers k10 and k19 (see Fig. 6). Color images available online at www.liebertonline.com/tec