Radiology · single question
In a patient with TMJ osteoarthritis, what would you MOST likely find on a panoramic radiograph?
Show answer and explanation
Correct answer: A. Condylar flattening and surface erosion
Osteoarthritis of the TMJ causes condylar flattening, osteophyte formation (beaking), subcortical sclerosis, and erosion of the condylar head on panoramic/CBCT imaging.
- A. CORRECT. Panoramic/CBCT findings in TMJ OA: flattening of the condylar head, osteophyte (spur/beak) formation, subchondral sclerosis, and condylar surface erosion — all degenerative bone remodeling features.
- B. Normal condylar morphology would indicate no degenerative change — inconsistent with OA.
- C. Zygomatic arch erosion is not a feature of TMJ osteoarthritis.
- D. Articular eminence erosion can occur with severe TMJ pathology but is not the primary finding in OA.