[논문]The effects of different metal posts, cements, and exposure parameters on cone-beam computed tomography artifacts

Ana Priscila Lira de Farias Freitas; Larissa Rangel Peixoto; Fernanda Clotilde Mariz Suassuna; Patricia Meira Bento; Ana Marly Araujo Maia Amorim; Karla Rovaris Silva; Renata Quirino de Almeida Barros; Andrea dos Anjos Pontual de Andrade Lima; Daniela Pita de Melo

doi:10.5624/isd.20220185

The effects of different metal posts, cements, and exposure parameters on cone-beam computed tomography artifacts 원문보기

Imaging science in dentistry, v.53, 2023년, pp.127 - 135

Ana Priscila Lira de Farias Freitas (Department of Oral Diagnosis, State University of Paraiba) , Larissa Rangel Peixoto (Department of Oral Diagnosis, State University of Paraiba) , Fernanda Clotilde Mariz Suassuna (Department of Oral Diagnosis, State University of Paraiba) , Patricia Meira Bento (Department of Oral Diagnosis, State University of Paraiba) , Ana Marly Araujo Maia Amorim (Department of Oral Diagnosis, State University of Paraiba) , Karla Rovaris Silva (Department of Oral Diagnosis, Federal University of Piaui) , Renata Quirino de Almeida Barros (Departmentof Oral Imaging of Unifacisa) , Andrea dos Anjos Pontual de Andrade Lima (Department of Oral Diagnosis, Federal University of Pernambuco) , Daniela Pita de Melo (Department of Oral Diagnosis, State University of Paraiba)

Abstract ▼ AI-Helper

Purpose: This study assessed the intensity of artifacts produced by 2 metal posts, 2 cements, and different exposure parameters using 2 cone-beam computed tomography (CBCT) units. Materials and Methods: The sample was composed of 20 single-rooted premolars, divided into 4 groups: Ni-Cr/zinc phosphate, Ni-Cr/resin cement, Ag-Pd/zinc phosphate, and Ag-Pd/resin cement. Samples were scanned before and after post insertion and cementation using a CS9000 3D scanner with 4 exposure parameters (85/90 kV and 6.3/10 mA) and an i-CAT scanner with 120 kV and 5 mA. The presence of artifacts was assessed subjectively by 2 observers and objectively by a trained observer using ImageJ software. The Mann-Whitney, Wilcoxon, weighted kappa, and chi-square tests were used to assess data at a 95% confidence level(α<0.05). Results: In the subjective analyses, AgPd presented more hypodense and hyperdense lines than NiCr (P<0.05), and more hypodense halos were found using i-CAT (P<0.05) than using CS9000 3D. More hypodense halos, hypodense lines, and hyperdense lines were observed at 10 mA than at 6.3 mA (P<0.05). More hypodense halos were observed at 85 kV than at 90 kV (P<0.05). CS9000 3D presented more hypodense and hyperdense lines than i-CAT (P<0.05). In the objective analyses, AgPd presented higher percentages of hyperdense and hypodense artifacts than NiCr (P<0.05). Zinc phosphate cement presented higher hyperdense artifact percentages on CS9000 3D scans(P<0.05). CS9000 3D presented higher artifact percentages than i-CAT(P<0.05). Conclusion: High-atomic-number alloys, higher tube current, and lower tube voltage may increase the artifacts present in CBCT images.

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The effects of different metal posts, cements, and exposure parameters on cone-beam computed tomography artifacts 원문보기

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