Periodontal disease is not a metabolic disease.
D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D001862:Bone Resorption / Q000209:etiology; D002118:Calcium / Q000172:deficiency; D006801:Humans; D010510:Periodontal Diseases / Q000209:etiology* / Q000378:metabolism; D010514:Periodontal Pocket / Q000209:etiology
D002118:Calcium