A dental hygiene article that includes a dental floss, a first component associated with the floss, a second component associated with the floss, and a first barrier constructed to separate the first component from the second component until flossing occurs. The first and the second components are selected...http://www.google.com.au/patents/US5937874?utm_source=gb-gplus-sharePatent US5937874 - Dental floss having two components which react to form an active agent
