Sensitivity to percussion is often due to inflammation extending into which area?

Sensitivity to percussion is commonly associated with the periodontal ligament. When there is inflammation in the surrounding tissues due to conditions such as periodontal disease, the periodontal ligament can become affected. This ligament, which connects the tooth to the alveolar bone and cushions the forces exerted on the tooth, reacts sensitively to percussion when inflamed.

The inflammation may arise from various sources, including infection or trauma, leading to increased sensitivity when pressure is applied to the tooth. In contrast, while the alveolar bone can also be involved in inflammatory processes, it is primarily the periodontal structures—including the ligament—that respond directly to percussion. Other options, such as mucosal tissue or tooth enamel, do not typically elicit sensitivity to percussion in the same way, making the periodontal ligament the correct area associated with this symptom.