title: Distinct categories of microbial forms associated with periodontal disease.
mesh_terms: D000328:Adult; D000368:Aged; D001419:Bacteria / Q000145:classification*; D003773:Dental Plaque / Q000145:classification / Q000382:microbiology*; D006801:Humans; D008875:Middle Aged; D010510:Periodontal Diseases / Q000382:microbiology*; D010512:Periodontal Index