How is a vertical root fracture most characteristically identified on a radiograph?

Correct answer: B. Both apical AND lateral radiolucency (halo pattern)

• A. Apical radiolucency alone is seen in apical periodontitis/abscess from pulpal pathology — not specific for VRF.
• B. Vertical root fractures (VRF) characteristically produce a 'halo' or 'J-shaped' radiolucency on radiographs — bone loss that extends BOTH apically AND laterally along the root. This halo pattern results from bone destruction along the entire fracture length. It is the classic radiographic sign of VRF.
• C. Widened PDL space is a non-specific finding seen in various conditions (trauma, early abscess, occlusal trauma).
• D. Lateral (lateral periodontal) radiolucency alone can indicate lateral periodontal abscess or external root resorption — not pathognomonic for VRF.