Determination of Proximity of Mandibular Third Molar to Mandibular Canal Using Panoramic Radiography and Cone-beam Computed Tomography Praveen Birur, DarshanaS Nayak, ShubhasiniA Raghavan, Shubha Gurudath, Gurushanth Keerthi Journal of Indian Academy of Oral Medicine and Radiology, 2017 Objectives: Position of inferior alveolar canal with respect to an impacted third molar reveals certain radiographic signs, but three-dimensional relationship to the canal can be provided with cone-beam computed tomography (CBCT). The purpose of this study was to determine which radiographic signs on panoramic radiography indicate a true relationship on CBCT. Materials and Methods: Forty samples with signs or symptoms of impacted mandibular third molar and panoramic radiograph showing signs of a close relationship with the mandibular canal as described by Félez-Gutiérrez et al. were included in the study and subjected to CBCT. Radiographic signs on panoramic radiography were compared with the relationship on CBCT. Statistical analysis was done using Chi-square test. Results: Twenty-one samples (52.5%) showed darkening of the apex, which was the most frequent type of radiographic sign of a close relationship on panoramic radiography. Twenty-three samples (57.5%) revealed a true relationship on CBCT. Darkening of the apex and narrowing of the canal were the signs most frequently associated with a true relationship. On CBCT, coronal and axial sections better predicted a true relationship. Conclusion: This study showed that the presence of any of the radiographic signs cannot definitely predict a true relationship; however, the presence of a close sign on panoramic radiography is often associated with a true relationship to the canal.
Multiple myeloma of the jaw: A case report ShubhasiniA Raghavan, PraveenBirur Nagaraj, Bhanushree Ramaswamy, DarshanaS Nayak Journal of Indian Academy of Oral Medicine and Radiology, 2014 Multiple myeloma is a systemic B-cell lymphoproliferative disease that causes osteolytic lesions in the vertebra, ribs, pelvic bone, skull and jaw. Rarely jaw lesions are seen as the first sign in multiple myeloma. This is a case report with follow up of a 57-year-old female patient, previously treated for osteoporosis, who presented with a swelling of the jaw. On radiographic examination, she was found to have osteolytic lesions in the mandible and skull bones. These conventional aids led to the diagnosis of multiple myeloma thereby proving that the osteoporotic lesions were a part of the spectrum of multiple myeloma. The patient underwent chemotherapy and is currently on follow-up. This case report emphasizes the importance of early diagnosis of multiple myeloma in the jaw using readily available technologies and illustrates the contribution that oral assessment can provide.
