#periodontal_disease__periodontaldisease__periodontitis__periodontiti  a disease that attacks the gum and bone and around the teeth
  supertype:  disease  an impairment of health or a condition of abnormal functioning
  subtype:  pyorrhea_alveolaris__pyorrhea__pyorrhoea__Riggs'_disease  chronic periodontitis; purulent inflammation of the teeth sockets
     subtype:  pericementoclasia  pus pocket formation around a tooth
  subtype:  alveolar_resorption  wasting of the bony socket
  subtype:  gingivitis  inflammation of the gums
  subtype:  ulatrophia  recession of the gums

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