title: [Morphologic description and analysis of calculus on the root surface of extracted teeth].
authors.forename: G H
authors.initials: GH
authors.lastname: Yi
mesh_terms: D003728:Dental Calculus / Q000150:complications / Q000473:pathology*; D006801:Humans; D010510:Periodontal Diseases / Q000150:complications / Q000473:pathology*; D014092:Tooth Root / Q000473:pathology