Influence of voxel size on cone-beam computed tomography-based detection of vertical root fractures in the presence of intracanal metallic posts
Yamamoto-Silva Fernanda Paula, de Oliveira Siqueira Claudeir Felipe, Silva Maria Alves Garcia Santos, Fonseca Rodrigo Borges, Santos Ananda Amaral, Estrela Carlos, de Freitas Silva Brunno Santos,
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( Yamamoto-Silva Fernanda Paula ) - Federal University of Goias School of Dentistry Department of Stomatologic Sciences
( de Oliveira Siqueira Claudeir Felipe ) - Federal University of Goias School of Dentistry Department of Stomatologic Sciences
( Silva Maria Alves Garcia Santos ) - Federal University of Goias School of Dentistry Department of Stomatologic Sciences
( Fonseca Rodrigo Borges ) - Federal University of Goias Dental School Department of Oral Rehabilitation
( Santos Ananda Amaral ) - Federal University of Goias School of Dentistry Department of Stomatologic Sciences
( Estrela Carlos ) - Federal University of Goias School of Dentistry Department of Stomatologic Sciences
( de Freitas Silva Brunno Santos ) - University of Anapolis School of Dentistry Department of Oral Pathology
Abstract
Purpose: This study was performed to evaluate the influence of voxel size and the accuracy of 2 cone-beam computed tomography (CBCT) systems in the detection of vertical root fracture (VRF) in the presence of intracanal metallic posts.
Materials and Methods: Thirty uniradicular extracted human teeth were selected and randomly divided into 2 groups (VRF group, n=15; and control group, n=15). The VRFs were induced by an Instron machine, and metallic posts were placed in both groups. The scans were acquired by CBCT with 4 different voxel sizes: 0.1 mm and 0.16 mm (for the Eagle 3D V-Beam system) and 0.125 mm and 0.2 mm (for the i-CAT system) (protocols 1, 2, 3, and 4, respectively). Interobserver and intraobserver agreement was assessed using the Cohen kappa test. Sensitivity and specificity were evaluated and receiver operating characteristic analysis was performed.
Results: The intraobserver coefficients indicated good (0.71) to very good (0.83) agreement, and the interobserver coefficients indicated moderate (0.57) to very good (0.80) agreement. In respect to the relationship between sensitivity and specificity, a statistically significant difference was found between protocols 1 (positive predictive value: 0.710, negative predictive value: 0.724) and 3 (positive predictive value: 0.727, negative predictive value: 0.632) (P<.05). The least interference due to artifact formation was observed using protocol 2.
Conclusion: Protocols with a smaller voxel size and field of view seemed to favor the detection of VRF in teeth with intracanal metallic posts.
키워드
Tooth Fractures; Cone-Beam Computed tomography
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