The early onset of periodontal disease.
D000818:Animals; D005881:Gingiva / Q000033:anatomy & histology; D005891:Gingivitis / Q000473:pathology; D000882:Haplorhini; D006801:Humans; D008208:Lymphatic System; D010510:Periodontal Diseases / Q000175:diagnosis* / Q000473:pathology*