Historical clue formulations

• Dentist's string — 2024-05-13
• Line through one's teeth? — 2018-11-25
• Often-unheeded advice from dentists — 2017-03-27
• Dental string — 2014-08-18
• Untwisted silk fibers — 2013-12-06
• Dental thread — 2013-08-12
• Dentist's advice — 2011-06-12
• It may get food away from a canine — 2009-12-17
• Dental hygienist's advice — 2009-05-06
• Line at the dentist's office? — 2007-05-27
• Dentist's advice … or a hint to 20-Across, 51-Across, 11-Down and 29-Down — 2006-11-23
• Toiletry item — 2004-12-26
• Dentist's advice — 2004-03-11
• Dislodge some particles — 2002-10-19
• Clean the hard-to-get-at areas, say — 2000-11-26
• It may be waxed — 2000-08-10
• Dentist's suggestion — 1999-06-13
• See 22-Across — 1998-06-27
• It's often waxed — 1996-11-09
• Dental care item — 1996-01-08
• Medicine cabinet item — 1995-08-13