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The low-dose MDCT and CBCT protocols are viable methods for maxillary sinus examination as evaluated using the above-mentioned phantom that yield a good diagnostic image quality using E approximately 7 and 11 times lower than that of the standard MDCT, respectively. These findings were evaluated in the in vivo part of this project.

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Background:In cone beam computed tomography (CBCT), metallic structures can cause artifacts in the images, since most teeth suspected to have vertical root fractures (VRF) are endodontically treated and have a metallic post in the root canal, fracture detection may pose a challenge. Aim: This study aimed to determine the diagnostic accuracy of CBCT using metal artifact reduction (MAR) algorithm in detection of VRF of teeth with metallic posts. Materials and Methods: A total of 120 single-rooted extracted human teeth were obtained and endodontically treated then placed in an acrylic block, and metallic posts were inserted. After post insertion, the teeth roots were divided into two groups one with induced VRF and the other having intact roots with the posts inserted. Then, each tooth was coded and imaged by CBCT with and without using MAR algorithm. Results: Using the MAR algorithm improved the diagnostic accuracy but with no statistically significant difference. Conclusion:In case of presence of metallic posts, CBCT with MAR algorithm can be used to detect VRF.

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