title: The periapical index: a scoring system for radiographic assessment of apical periodontitis.
authors.forename: D
authors.initials: D
authors.lastname: Orstavik
authors.forename: K
authors.initials: K
authors.lastname: Kerekes
authors.forename: H M
authors.initials: HM
authors.lastname: Eriksen
mesh_terms: D005544:Forecasting; D006801:Humans; D008722:Methods; D010485:Periapical Periodontitis / Q000175:diagnosis / Q000000981:diagnostic imaging*; D010512:Periodontal Index; D011379:Prognosis; D011859:Radiography