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  • Title: Root canal filling materials spread pattern mimicking root fractures in dental CBCT images.
    Author: Iikubo M, Osano T, Sano T, Katsumata A, Ariji E, Kobayashi K, Sasano T, Wakoh M, Seki K, Kojima I, Sakamoto M.
    Journal: Oral Surg Oral Med Oral Pathol Oral Radiol; 2015 Oct; 120(4):521-7. PubMed ID: 26346912.
    Abstract:
    OBJECTIVE: To clarify the cause of artificial tooth-root fracture lines in cone beam computed tomography (CBCT) images caused by root canal filling materials and to enhance the diagnostic performance of CBCT. STUDY DESIGN: We analyzed the CBCT images of 18 extracted human teeth (9 upper central incisors and 9 lower premolars) that were filled with a size 50 gutta-percha cone and inserted into tooth sockets in a human skull. RESULTS: The CBCT images of the incisors displayed artificial lines in the oblique directions, notably the mesiobuccal, distolingual, distobuccal and mesiolingual directions, but only rarely in the cross-directions (buccal, lingual, mesial, and distal). In the premolars, the reverse was true, with lines mainly in the cross-directions, mesial and distal directions particularly. The lines were predominantly at the cervical slice. CONCLUSIONS: Artifacts resulting from root filling material appear along the long axis of the alveolar bones, and resemble root fractures.
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