NOT an example of a periapical or periradicular change from pulp disease?

• A. Periapical abscess
• B. Idiopathic osteosclerosis
• C. Granuloma
• D. Cyst

Answer: (B)

The main idea is telling apart lesions at the tooth apex that come from pulpal infection versus other bone changes that look nearby but aren’t caused by the tooth’s pulp.

When the pulp becomes inflamed or necrotic, the inflammatory process can spread to the periapical tissues, producing classic periapical changes such as an abscess (acute pus at the apex), a granuloma (chronic inflammatory tissue at the apex), or a radicular cyst (an epithelial-lined cavity at the apex). These are all directly linked to pulpal disease and show up as periapical or periradicular lesions, typically radiolucent on X-rays and often associated with a nonvital pulp.

Idiopathic osteosclerosis, on the other hand, is a localized area of increased bone density that is not inflammatory and not caused by pulpal infection. It appears as a well-defined radiopaque area near the root apex and does not involve pus, inflammatory granulation tissue, or cyst formation. Because it isn’t driven by pulp disease, it isn’t considered a periapical or periradicular change from pulp disease.

So the correct choice is the one describing a dense bone island: it’s not a periapical lesion arising from pulpal pathology.