title: Incidence of four-rooted maxillary second molars: literature review and radiographic survey of 1,200 teeth.
abstract: A study of 1,200 teeth was carried out in order to determine the occurrence of four-rooted maxillary second molars. One-thousand untreated teeth were examined radiographically. Two-hundred teeth were evaluated radiographically following endodontic treatment. The results indicated that only 0.4% of the teeth presented with four separate roots. Endodontic therapy in such a tooth is described.
authors.forename: H
authors.initials: H
authors.lastname: Libfeld
authors.forename: I
authors.initials: I
authors.lastname: Rotstein
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D015994:Incidence; D008963:Molar / Q000002:abnormalities*; D014071:Tooth Abnormalities / Q000453:epidemiology; D014092:Tooth Root / Q000002:abnormalities*