BASS, C C A demonstrable line on extracted teeth indicating the location of the outer border of the epithelial attachment. [electronic resource] - Journal of dental research Oct 1946 - 401-15 p. digital Publication Type: Journal Article ISSN: 0022-0345 Standard No.: 10.1177/00220345460250051201 doi Subjects--Topical Terms: Epithelial AttachmentHumansToothTooth Extraction