Attachment between the oral epithelium and enamel is mediated by_______________?
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Answer: C. Hemidesmosomes
Explanation
Epithelial attachment between the junctional epithelium and enamel is mediated by hemidesmosomes. These specialized junctional complexes anchor epithelial cells securely to the underlying basal lamina. They provide a vital sealing mechanism preventing bacterial penetration into periodontal tissues. The junctional epithelium attaches the gingiva to the tooth surface via an internal basal lamina. Hemidesmosomes transmembrane proteins connect intracellular keratin filaments to extracellular matrix proteins. This adhesive seal protects the underlying periodontal ligament space from oral microbial invasion.
Disruption of hemidesmosomes leads to periodontal pocket formation and clinical attachment loss. Periodontal disease treatments aim to preserve or re-establish this vital epithelial attachment. Histology slides demonstrate these microscopic adhesive structures at the tooth-gingiva interface. Option A refers to delicate connective tissue fibers providing structural framework in organs. Option B describes major fibrous proteins forming the bulk of dermal and periodontal ligament tissue. Option D represents intercellular junctions connecting adjacent epithelial cells rather than tooth surfaces.
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Answer: A. Cortical
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