title: In search of a working length.
authors.affiliation: Department of Endodontics, Virginia Commonwealth University, Richmond, VA, USA. frliewehr@vcu.edu
authors.forename: Frederick R
authors.initials: FR
authors.lastname: Liewehr
mesh_terms: D003786:Dental Pulp Cavity / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D006801:Humans; D009811:Odontometry; D011859:Radiography; D018915:Root Canal Preparation / Q000295:instrumentation; D014092:Tooth Root / Q000033:anatomy & histology* / Q000000981:diagnostic imaging