Sulcular Epithelium
The non-keratinized epithelial lining of the gingival sulcus, which faces the tooth surface and is distinct from both oral epithelium and junctional epithelium.
Full Definition
Sulcular epithelium is the stratified squamous, non-keratinized tissue that lines the lateral wall of the gingival sulcus between the free gingival margin and the junctional epithelium. It is more permeable than oral epithelium and plays a role in the inflammatory response to subgingival bacteria. Editors working on periodontal pathology texts must distinguish this term from 'junctional epithelium,' which attaches directly to the tooth surface, and from 'oral epithelium,' which is the outer keratinized tissue of the gingiva. Correct anatomical precision is critical in dental hygiene case study reports.
Usage
Usage note: Do not use interchangeably with 'junctional epithelium.' The two structures are anatomically distinct and serve different functions.
In Context
- "Histological findings confirmed ulceration of the sulcular epithelium consistent with necrotizing ulcerative gingivitis." — Pathology Case Report
- "The author incorrectly used 'junctional epithelium' where 'sulcular epithelium' was the anatomically accurate term." — Peer Review Comment