What is the name of the area at the bottom of the sulcus where gingiva attaches to the tooth?

The area at the bottom of the sulcus where the gingiva attaches to the tooth is known as the epithelial attachment. This term specifically describes the interface between the epithelial tissue of the gingiva and the tooth surface, playing a critical role in maintaining periodontal health. The epithelial attachment is vital for forming a seal that protects underlying structures from bacteria and other potential irritants.

In healthy gum tissue, this attachment is normally found just below the gingival margin, where the junctional epithelium acts as a barrier. This area helps to anchor the gingiva to the tooth, establishing a connection essential for both structural integrity and functional health.

Other terms such as cervical attachment and gingival margin refer to different aspects of the tooth and gum relationship. The cervical attachment typically refers to the area closer to the cementoenamel junction, while the gingival margin defines the edge of the gingiva at the top of the gingival sulcus. The periodontal ligament also plays a vital role in anchoring the tooth to the bone but is distinct from the epithelial attachment, as it is connective tissue linking the tooth root to the alveolar bone. Understanding these distinctions can clarify the specific roles and structures within periodontal anatomy.