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The Junctional Epithelium: from Health to Disease
D.D. Bosshardt* and
N.P. Lang
Department of Periodontology and Fixed Prosthodontics, School of Dental Medicine, University of Berne, Freiburgstrasse 7, CH-3010 Berne, Switzerland;
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Figure 1. Light microscopic view of human gingiva (from a young, clinically healthy subject) illustrating its dimensions and relations. ABC, alveolar bone crest; AEFC, acellular extrinsic fiber cementum; CEJ, cemento-enamel junction; CT, gingival connective tissue; D, dentin; ES, enamel space; GM, gingival margin; JE, junctional epithelium; OGE, oral gingival epithelium; OSE, oral sulcular epithelium; PL, periodontal ligament. Courtesy of Dr. H.E. Schroeder.
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Figure 2. Back-scattered scanning electron micrograph showing the tapering off, in the apical direction, of the junctional epithelium (JE) in a porcine tooth with a clinically healthy gingiva. CEJ, cemento-enamel junction; CT, gingival connective tissue; D, dentin; ES, enamel space. Courtesy of Dr. A. Nanci.
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Figure 3. Transmission electron micrograph illustrating the epithelial cell morphology in the innermost portion of the junctional epithelium of a human tooth with a clinically healthy gingiva. ES, enamel space; N, nuclei of epithelial cells; PMN, polymorphonuclear leukocyte.
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Figure 4. Transmission electron micrograph showing a well-developed Golgi apparatus (G) and numerous mitochondria (M) in the cytoplasm of a junctional epithelial cell in a human tooth with a clinically healthy gingiva. N, nuclei.
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Figure 5. Transmission electron micrograph illustrating desmosomes (DES) and cytokeratin filaments (CK) in the junctional epithelium from a human tooth with a clinically healthy gingiva. N, nucleus of a junctional epithelial cell.
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Figure 6. Transmission electron micrograph showing polymorphonuclear leukocytes (PMN) residing in the intercellular spaces of the junctional epithelium of a human tooth with a clinically healthy gingiva. ES, enamel space; N, nuclei of junctional epithelial cells.
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Figure 7. Transmission electron micrograph illustrating the basal lamina, consisting of the lamina lucida (LL) and the lamina densa (LD), and hemidesmosomes (HD) at the interface between the junctional epithelium and the tooth. The interposed matrix layer (*) may be a dental cuticle or a modified cementum matrix. The micrograph originates from a healthy but receded gingival site of a human tooth. AEFC, acellular extrinsic fiber cementum; CK, cytokeratin filaments.
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Figure 8. Transmission electron micrograph showing the attachment of the junctional epithelium to the root cementum (C) from a healthy site of the receded gingiva in a human tooth. The interposed matrix layer (*) is a modified cementum matrix. N, nuclei of junctional epithelial cells.
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Figure 9. Transmission electron micrograph illustrating junctional epithelial cells facing a dental cuticle-like material (DC) in a human tooth. The gingival biopsy originated from a healthy site. ES, enamel space.
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Journal of Dental Research, Vol. 84, No. 1,
9-20 (2005)
DOI: 10.1177/154405910508400102
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