[Scanning electron microscopy study on periodontally diseased root surfaces].
D003728:Dental Calculus / Q000473:pathology; D003773:Dental Plaque / Q000473:pathology; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010510:Periodontal Diseases / Q000473:pathology*; D014092:Tooth Root / Q000648:ultrastructure*