What characterizes a periodontal pocket?

A periodontal pocket is characterized by the detachment of the gingiva from the tooth. This occurs due to the destruction of the supporting tissues surrounding the teeth, which may be a result of periodontal disease. In a healthy state, the gingiva tightly adheres to the tooth structure, creating a healthy sulcus, typically measuring 1-3 mm in depth. When periodontal disease progresses, inflammation and infection can lead to the loss of attachment, causing the gingiva to separate from the tooth, resulting in the formation of a periodontal pocket.

This detachment is significant as it contributes to the accumulation of plaque and bacteria within the pocket, making it difficult to maintain oral hygiene and potentially leading to further periodontal issues. Other options like healthy sulcus depth, excessive tooth brushing, and normal gingival tissue attachment do not align with the definition of a periodontal pocket, as they would indicate a state of health rather than disease.