Assessment of the root filling volume in C-shaped root canal on cone-beam CT and micro-CT in relation to nano-CT

Author(s)

Candemil, Amanda Pelegrin ; Mazzi-Chaves, Jardel Francisco ; Oliveira, Matheus Lima ; Ambrosano, Guilherme Bovi ; Vasconcelos, Karla Farias ; Pauwels, Ruben ; Jacobs, Reinhilde ; Sousa-Neto, Manoel Damiao

• Document type: Journal article
• Source: CLINICAL ORAL INVESTIGATIONS; v. 27, n. 11, p. 8-pg., 2023-09-14.

Abstract

Aim To assess the observed volume of filled C-shaped root canals from different CBCT and micro-CT having nano-CT as a reference.Materials and methods Twelve extracted mandibular molars with C-shaped root canals were endodontically treated using Reciproc Blue R25 (VDW GMBH, Munich, Germany) in a reciprocating system and filled with gutta-percha (Dentsply Maillefer) and AH Plus sealer (Dentsply DeTrey, Konstanz, Germany). CBCT scans were performed using 3 units-3D Accuitomo 170 (J. Morita, Kyoto, Japan), ProMax 3D Max (Planmeca, Helsinki, Finland), and NewTom VGi EVO (Cefla QR, Verona, Italy)-at two resolution modes: standard and high. Micro-CT and nano-CT scans were also obtained. The volume of all filled C-shaped root canals was obtained using CTAn software (Bruker, Kontich, Belgium), and the blooming artifact, in relation to nano-CT volume, was calculated. The data were evaluated by the Bland-Altman plots and ANOVA two-way for repeated measures (alpha = 0.05).Results All CBCT units and micro-CT showed significantly larger observed volume of root canal filling when compared to nano-CT. The blooming artifact of root canal filling in standard resolution was significantly larger than that in high resolution (p < 0.05) in all CBCT units.Conclusions Endodontic filling material with AH Plus sealer causes blooming artifacts in CBCT units and micro-CT.Clinical relevance Considering the anatomical complexity of C-shaped root canals and the challenges associated with endodontic treatment, CBCT is frequently recommended for follow-up evaluations. However, the presence of endodontic filling material can result in blooming artifacts that may potentially impact the accurate diagnosis of endodontic complications. (AU)

• FAPESP's process: 21/01623-8 - Effect of the reduction of artefacts arising from high-density materials on cone-beam CT by artificial intelligence on the diagnosis of vertical root fracture and root perforation
• Grantee: Amanda Candemil Kanashiro
• Support Opportunities: Scholarships in Brazil - Post-Doctoral