A DEMONSTRABLE LINE ON EXTRACTED TEETH INDICATING THE LOCATION OF THE OUTER BORDER OF THE EPITHELIAL ATTACHMENT

¹ School of Medicine, Tulane University of Louisiana, New Orleans, La.

1. Attention has been directed to a demonstrable line on extracted teeth which is a good guide to the location of the outer border of the epithelial attachment. Technic for demonstrating it was given.

2. The line consists of a denser stained border or zone of the cuticular structure upon which the epithelial attachment rests. The denser staining is due to disintegration of this part of the cuticle.

3. It is proposed to call the cuticle upon which the epithelial attachment rests and which is produced by the epithelial attachment, the epithelial-attachment cuticle and this line, the zone of disintegrating epithelial-attachment cuticle or zdeac.