Which test result would indicate a necrotic pulp with symptomatic apical periodontitis?

• A. Percussion sensitivity with no electric pulp test response
• B. Positive electric pulp test response
• C. Cold test positive
• D. No percussion tenderness

Answer: (A)

In endodontic testing, you assess both pulp vitality and periapical inflammation. A pulp that is necrotic will not respond to vitality tests, while symptomatic apical periodontitis causes tenderness on percussion due to inflammation at the tooth’s apex. Seeing percussion sensitivity together with no response to electric pulp testing fits a nonvital pulp with inflamed periapical tissues. The other scenarios imply some pulp vitality (positive EPT or a positive cold test) or lack periapical tenderness, which wouldn’t match necrotic pulp with symptomatic apical periodontitis.