title: Bacterial penetration into the gingival tissue in periodontal disease.
mesh_terms: D001419:Bacteria / Q000166:cytology*; D018407:Bacterial Physiological Phenomena; D005881:Gingiva / Q000382:microbiology* / Q000648:ultrastructure; D006801:Humans; D010510:Periodontal Diseases / Q000382:microbiology* / Q000473:pathology; D010586:Phagocytes / Q000502:physiology