Masahiro Iikubo1, Takashi Nishioka2, Shintaro Okura3, Kaoru Kobayashi3, Tsukasa Sano3, Akitoshi Katsumata4, Eiichiro Ariji5, Ikuho Kojima2, Maya Sakamoto2, Takashi Sasano2. 1. Department of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan. Electronic address: Machapy@dent.tohoku.ac.jp. 2. Department of Oral Diagnosis, Tohoku University Graduate School of Dentistry, Sendai, Japan. 3. Department of Oral and Maxillofacial Radiology and Diagnosis, Tsurumi University School of Dental Medicine, Yokohama, Japan. 4. Department of Oral Radiology, Asahi University School of Dentistry, Mizuho, Japan. 5. Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan.
Abstract
OBJECTIVE: To determine the optimal scan settings (scan mode and position of field of view [FOV]) for cone beam computed tomography to reduce root fracture-like artifacts that are often observed in teeth filled with gutta-percha cones (GPCs). STUDY DESIGN: Fracture-like artifacts that appeared on cone beam computed tomography images of 9 extracted human mandibular premolars filled with GPCs were analyzed using I-mode (FOV, 102 mm; voxel size, 0.2 mm) and D-mode (FOV, 51 mm; voxel size, 0.1 mm) settings. RESULTS: The artificial lines were more obvious in I-mode than in D-mode. Increased distance between the center of the FOV and the GPCs produced stronger artificial lines in both I-mode and D-mode. CONCLUSION: To reduce fracture-like artifacts, it is critical to use a mode with small voxel size and to place the target tooth in the center of the FOV.
OBJECTIVE: To determine the optimal scan settings (scan mode and position of field of view [FOV]) for cone beam computed tomography to reduce root fracture-like artifacts that are often observed in teeth filled with gutta-percha cones (GPCs). STUDY DESIGN:Fracture-like artifacts that appeared on cone beam computed tomography images of 9 extracted human mandibular premolars filled with GPCs were analyzed using I-mode (FOV, 102 mm; voxel size, 0.2 mm) and D-mode (FOV, 51 mm; voxel size, 0.1 mm) settings. RESULTS: The artificial lines were more obvious in I-mode than in D-mode. Increased distance between the center of the FOV and the GPCs produced stronger artificial lines in both I-mode and D-mode. CONCLUSION: To reduce fracture-like artifacts, it is critical to use a mode with small voxel size and to place the target tooth in the center of the FOV.
Authors: Martina Gerlane de Oliveira Pinto; Saulo L Sousa Melo; Fernanda Clotilde Mariz Suassuna; Luiz Eduardo Marinho; José Bruno da Silva Leite; Andre Ulisses Dantas Batista; Patrícia Meira Bento; Daniela Pita Melo Journal: Dentomaxillofac Radiol Date: 2021-02-10 Impact factor: 3.525