Radiology A radio-opaque mass continuous with the cementoenamel junction attached to the distal surface of the first premolar is: A Hyper Keratosis B Calculus C Food debris D Epithelial attachment 💡 Explanation A radio-opaque mass continuous with the cementoenamel junction attached to the distal surface of the first premolar is: ✓ Correct Answer: B. Calculus