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http://dx.doi.org/10.5624/isd.2017.47.3.189

Quantitative assessment of image artifacts from root filling materials on CBCT scans made using several exposure parameters  

Rabelo, Katharina Alves (Department of Oral Diagnosis, State University of Paraiba)
Cavalcanti, Yuri Wanderley (Department of Oral Diagnosis, State University of Paraiba)
de Oliveira Pinto, Martina Gerlane (Department of Oral Diagnosis, State University of Paraiba)
Melo, Saulo Leonardo Sousa (Department of Oral Pathology, Radiology and Medicine, University of Iowa)
Campos, Paulo Sergio Flores (Department of Oral Diagnosis, Federal University of Bahia)
de Andrade Freitas Oliveira, Luciana Soares (Department of Health Technology and Biology, Division of Radiology, Federal Institute of Bahia)
de Melo, Daniela Pita (Department of Oral Diagnosis, State University of Paraiba)
Publication Information
Imaging Science in Dentistry / v.47, no.3, 2017 , pp. 189-197 More about this Journal
Abstract
Purpose: To quantify artifacts from different root filling materials in cone-beam computed tomography (CBCT) images acquired using different exposure parameters. Materials and Methods: Fifteen single-rooted teeth were scanned using 8 different exposure protocols with 3 different filling materials and once without filling material as a control group. Artifact quantification was performed by a trained observer who made measurements in the central axial slice of all acquired images in a fixed region of interest using ImageJ. Hyperdense artifacts, hypodense artifacts, and the remaining tooth area were identified, and the percentages of hyperdense and hypodense artifacts, remaining tooth area, and tooth area affected by the artifacts were calculated. Artifacts were analyzed qualitatively by 2 observers using the following scores: absence (0), moderate presence (1), and high presence (2) for hypodense halos, hypodense lines, and hyperdense lines. Two-way ANOVA and the post-hoc Tukey test were used for quantitative and qualitative artifact analysis. The Dunnet test was also used for qualitative analysis. The significance level was set at P<.05. Results: There were no significant interactions among the exposure parameters in the quantitative or qualitative analysis. Significant differences were observed among the studied filling materials in all quantitative analyses. In the qualitative analyses, all materials differed from the control group in terms of hypodense and hyperdense lines (P<.05). Fiberglass posts did not differ statistically from the control group in terms of hypodense halos(P>.05). Conclusion: Different exposure parameters did not affect the objective or subjective observations of artifacts in CBCT images; however, the filling materials used in endodontic restorations did affect both types of assessments.
Keywords
Imaging, Three-Dimensional; Cone-Beam Computed Tomography; Artifacts;
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