On a periapical radiograph, which finding most strongly suggests apical periodontitis?

On a periapical radiograph, which finding most strongly suggests apical periodontitis?

• A. Periapical radiolucency around the apex
• B. Increased radiopacity at apex
• C. Intact lamina dura
• D. No canal variation

Answer: (A)

The main indicator of apical periodontitis on a periapical radiograph is a radiolucent area around the apex, reflecting inflammatory bone loss in the periapical region. This darker zone is the clearest sign that the bone around the tooth tip has been destroyed by the inflammatory process. Increased radiopacity at the apex would suggest sclerosis or calcified changes, not active inflammation. An intact lamina dura argues against periapical pathology, since the normal bony border around the root would remain continuous if there were no disease. The absence of any canal variation is not related to periapical health. So, the clear radiolucency around the apex best signals apical periodontitis.

The main indicator of apical periodontitis on a periapical radiograph is a radiolucent area around the apex, reflecting inflammatory bone loss in the periapical region. This darker zone is the clearest sign that the bone around the tooth tip has been destroyed by the inflammatory process. Increased radiopacity at the apex would suggest sclerosis or calcified changes, not active inflammation. An intact lamina dura argues against periapical pathology, since the normal bony border around the root would remain continuous if there were no disease. The absence of any canal variation is not related to periapical health. So, the clear radiolucency around the apex best signals apical periodontitis.