Which of the following indicates periodontal disease when noted during an examination?

In the context of periodontal disease, the measurement of pocket depths is a critical indicator of the health of the periodontal tissues surrounding the teeth. Healthy gingiva typically has a sulcus depth of 1-3 mm. When pocket depths exceed 3 mm, it suggests the presence of periodontal issues, as this indicates a potential loss of attachment due to inflammation or infection in the surrounding tissues. This deepening of the pockets is often associated with the accumulation of plaque and tartar, leading to gingivitis and potentially progressing to periodontitis if untreated.

The identification of pocket depths greater than 3 mm during an examination is, therefore, a key diagnostic criterion for periodontal disease, confirming that the disease is affecting the periodontal structures and that further intervention may be required to protect the patient's oral health.

In contrast, healthy gingiva, tooth sensitivity, and filling restorations do not directly indicate periodontal disease. While tooth sensitivity can be associated with various dental issues, it does not specifically signal periodontal disease. Fillings relate to restorative dental care and do not provide information about periodontal health.