Progression of untreated periodontitis as assessed by subtraction radiography.
D000328:Adult; D000368:Aged; D000539:Alveolar Process / Q000000981:diagnostic imaging; D001862:Bone Resorption / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D010518:Periodontitis / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography; D013382:Subtraction Technique; D013997:Time Factors