- periodontal disease, periodontitis - a disease that attacks the gum and bone and around the teeth
--1 is a kind of disease
--1 has particulars:pyorrhea, pyorrhoea, pyorrhea alveolaris, Riggs' disease; alveolar resorption; gingivitis; ulatrophia
pyorrhea, pyorrhoea, pyorrhea alveolaris, Riggs' disease; alveolar resorption; gingivitis; ulatrophia |