NOT a synonym for Idiopathic Osteosclerosis?

• A. Dense bone island
• B. Hypercementosis
• C. Eburnation
• D. Bone whorl

Answer: (B)

Idiopathic osteosclerosis presents as a localized, radiopaque area within the jaw bone that is not attached to a tooth root and typically shows no expansion or radiolucent border. It is classically called a dense bone island because it represents dense, compact bone within cancellous bone.

Hypercementosis is not a synonym because it describes excessive cementum deposition on a tooth root, usually at the apex, which is a root-associated tooth change rather than a bone lesion inside the jaw. Radiographically, it appears as thickened cementum blending with the tooth root and extending the root outline, not as a separate intraosseous radiopaque mass. Since idiopathic osteosclerosis is a bone lesion within the jaw bone itself and not a root-related cementum process, this option is not a synonym for IO.