A consideration of root proximity.
D000368:Aged; D000539:Alveolar Process / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008297:Male; D010518:Periodontitis / Q000473:pathology / Q000628:therapy; D010519:Periodontium / Q000033:anatomy & histology; D014070:Tooth / Q000033:anatomy & histology; D014092:Tooth Root / Q000033:anatomy & histology*