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Anatomy & Histology of the Gingival Unit and Basic Oral Hygiene

Course Number: 592


Before beginning the study of the gingiva and oral hygiene procedures it is necessary to define several terms commonly used.

apical – Towards the root.

cementoenamel junction (CEJ) – Junction of cementum (root) and enamel (crown).

coronal – Towards the chewing surface of the tooth.

gingival margin – Portion of the free gingiva that is located at the CEJ.

histology – The study of tissues.

interdental papilla – Gingiva extending between two adjacent teeth.

pellicle – Thin film made of saliva, cells, and bacteria that starts the plaque formation process.

periodontium – Collective term for the structures that support the teeth.