Evaluation of 2-and 3-dimensional anatomic parameters of C-shaped root canals with cone beam computed tomography, microcomputed tomography, and nanocomputed tomography

Author(s)

Molina, Miguel Angel Ventura ; Silva, Giovane Oliveira ; Candemil, Amanda Pelegrin ; de Camargo, Rafael Verardino ; Pauwels, Ruben ; Jacobs, Reinhilde ; Sousa-Neto, Manoel Damiao ; Mazzi-Chaves, Jardel Francisco

• Document type: Journal article
• Source: ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY; v. 136, n. 6, p. 10-pg., 2023-12-04.

Abstract

Objective. The objective of this study was to evaluate 2-dimensional (2D) and 3D morphometric parameters of C-shaped root canals on cone beam computed tomography (CBCT) and microcomputed tomography (microCT) images using nanocomputed tomography (nanoCT) as the reference standard.Study Design. Sixty mandibular molars with C-shaped canals were individually scanned using nanoCT and microCT. Cone beam computed tomography acquisitions were then performed with 4 CBCT systems, using high and standard resolutions. The 2D parameters of roundness and major and minor diameters were obtained in the cross sections of the root canals at 1, 2, and 3 mm from the root apex. The 3D parameters of surface area, volume, and structure model index were measured considering the entire extension of the root canals. Absolute error (AE) in measurement was calculated against the nanoCT values. Data were statistically analyzed with the Shapiro-Wilk test and analysis of variance (a = 0.05).Results. No significant differences in AE were discovered for the 2D parameters among microCT and the CBCT scans. The AE val-ues for the 3D parameters of volume and surface area were significantly smaller in microCT compared to all CBCT units (P < .05). Significantly lower AE values for surface area were observed in high resolution compared to standard resolution for all CBCT units (P < .05). Structure model index did not differ significantly among microCT and all CBCT protocols.Conclusions. Cone beam computed tomography images showed accuracy for evaluating 2D parameters and over-and underestimation for 3D parameters. (Oral Surg Oral Med Oral Pathol Oral Radiol 2023;136:759-768) (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
• FAPESP's process: 20/09242-0 - Evaluation of the expression of image artifacts created by different intracanal medications in cone beam computed tomography and microcomputed tomography
• Grantee: Giovane Oliveira Silva
• Support Opportunities: Scholarships in Brazil - Scientific Initiation