Specific spindle cells and certain mesenchymal cells in tooth germ.

In the previous study entitled " Specific Spindle Cells and Globular Substances in Enamel Knot" the auther reported that (1) the specific spindle cells appear at the free ends of the tooth bud and in the enamel knot, and they have a specific stain affinity and the characters of their staining powers are not nucleic-acid, and (2) certain irregular-shaped mesenchymal cells, whose nuclei showed almost the same hue as that of the spindle cells with Masson Goldner stain and Mallory Heidenhain stain, were present in the dental papilla. Since there was no previous report on these structures in the tooth germ, the author investigated the nucleoprotein of these cells histochemically, and these results will be reported in this paper.