[Root-crown ratios and periodontal disease].
D000328:Adult; D000818:Animals; D002648:Child; D003759:Dental Implantation, Endosseous, Endodontic; D005260:Female; D006801:Humans; D009811:Odontometry; D010510:Periodontal Diseases / Q000473:pathology*; D012391:Root Resorption; D014092:Tooth Root / Q000033:anatomy & histology / Q000473:pathology*