title: 19th century dentistry advertising trade cards. Ricksecker's "Perfection" tooth brushes, circa 1890.
authors.affiliation: Department of Pediatric Dentistry, University of Pennsylvania School of Dental Medicine, USA.
authors.forename: Theodore P
authors.initials: TP
authors.lastname: Croll
authors.forename: Ben Z
authors.initials: BZ
authors.lastname: Swanson
mesh_terms: D000329:Advertising / Q000266:history*; D049672:History, 19th Century; D014099:Toothbrushing / Q000266:history* / Q000295:instrumentation; D014481:United States