Which is a typical radiographic finding for periapical abscess, granuloma, or cyst?

• A. A radiolucent lesion at the apex with loss of lamina dura
• B. A radiolucent lesion at the apex with possible loss of lamina dura
• C. A widened periodontal ligament space without radiolucency
• D. No radiographic changes

Answer: (A)

The key idea is that inflammatory lesions around the tooth tip typically produce a radiolucent area at the apex on a dental X-ray, and they often disrupt the surrounding bony lining. The lamina dura is the dense white border that normally surrounds the tooth root; when a periapical abscess, granuloma, or cyst develops, bone destruction and inflammatory pressure can cause this border to disappear or blur. So seeing a radiolucent lesion at the apex with loss of the lamina dura is the classic radiographic sign of these conditions. A radiolucent spot without lamina dura loss is less definitive, widened PDL space without radiolucency isn’t the typical finding for these lesions, and no radiographic changes would not fit the presentation.