Figure 5
From: Dentin-like tissue formation and biomineralization by multicellular human pulp cell spheres in vitro
Scanning electron microscopic sphere and cell investigation. SEM images of the outer epithelial-like shell of a cell sphere (a) and the less organized cells with a higher production of extracellular matrix inside the sphere (b). Figure (c) shows a pulp sphere attached onto bovine dentin with a high number of outgrowing, multilayered cells as well as flat spread out and attached cells on bovine root dentin (d). The white arrows in figure (4c) highlight the dentin tubule-like holes in the cell multi-layer.