“As the location of the epithelial attachment moves apexward in the course of the disease process, periodontoclasia, the location of this demonstrable line (the zdeac) changes correspondingly apexward from its normal location high on the anatomical crown.”
“'While this paper refers especially to attached bacterial film on the tooth at the bottom of the periodontal lesion, attention may be called to the great abundance and preponderance of spirochetes* in the narrow space between the attached film pad and the epithelial cell wall of the pocket.”
“There is a great abundance of spirochetal organisms closely associated with the growing ends and fruiting heads in this space, especially the space immediately over the zdeac.”
"A Clean Tooth Does Not Decay, nor does periodontoclasia occur about a clean tooth." C. C. Bass, M.D.