Fig. 4
Case with periosteal reaction. A 70-year-old female experienced discomfort in the lower left molar region and sought care at a dental clinic. Initially, she was informed about the impacted lower left third molar but was left untreated. Later, swelling in the area developed, leading to a referral to our hospital. She was diagnosed with bacterial OM because of exclusion from the ORN or MRONJ criteria. (A, B) The CT images (bone mode) showing an area of increased CT values continuous with the outer cortical bone (arrows). (C) Panoramic X-ray image revealing increased radiopacity (new bone formation) along the lower border of the mandible (arrows). (D) T2-weighted fat-suppressed MR image displaying a high signal intensity area continuous with the outer cortical bone (arrows).
