Radiology · single question

What is the KEY test to differentiate condensing osteitis from idiopathic osteosclerosis?

  1. Tooth vitality testing
  2. CBCT volumetric assessment
  3. Periapical biopsy
  4. CT density measurement
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Correct answer: A. Tooth vitality testing

  • A. Correct. VITALITY TESTING is the key differentiator. Condensing osteitis: reactive bone from low-grade pulpal infection → associated tooth is NON-VITAL. Idiopathic osteosclerosis (dense bone island): adjacent tooth is VITAL with NO pulpal pathology. Simple cold/EPT testing resolves the diagnosis.
  • B. Incorrect. CBCT provides anatomical data but cannot determine tooth vitality.
  • C. Incorrect. Biopsy is invasive and rarely needed when vitality testing gives the answer.
  • D. Incorrect. Both appear radiopaque and cannot be differentiated by density alone.

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