[Structures of the gingival epithelium and periodontal diseases].
D000818:Animals; D004846:Epithelial Attachment / Q000648:ultrastructure*; D004848:Epithelium / Q000648:ultrastructure; D005856:Germ-Free Life; D005881:Gingiva / Q000648:ultrastructure*; D010510:Periodontal Diseases / Q000473:pathology*; D010519:Periodontium / Q000648:ultrastructure*; D051381:Rats; D011919:Rats, Inbred Strains