• Amir Eskandarlou, Jalal Poorolajal, Ahmad Reza Talaeipour, Sahar Talebi, and Maziar Talaeipour.
• Department of Dentomaxillofacial Radiology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
• Dent Traumatol. 2014 Apr 1; 30 (2): 162-8.

BackgroundThe aim of this study was to compare the accuracy of cone beam computed tomography (CBCT) and multislice computed tomography (MSCT) in diagnosing factitious fractures in maxillofacial region as well as to investigate the influence of field of view (FOV) size on the interpretation of maxillofacial fractures in CBCT.MethodsSimulated fractures were created in the right and left sides of five dried human skulls using a micro-saw 20 mm blade without displacement. The skulls were scanned with a spiral 16-slice MSCT scanner and a CBCT device with two FOVs (6 × 6, 15 × 15). Three observers assessed and interpreted the images judging whether fracture was present or absent. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and the area under the receiver operating characteristic (ROC) curve were calculated.ResultsThe sensitivity of CBCT 6 × 6, CBCT 15 × 15, and MSCT was 87.5%, 70.7%, and 49.7% and the specificity of three modalities was 91.7%, 88.0%, and 98.3%, respectively. The area under ROC curve was 0.90 (95% CI: 0.85, 0.94) for CBCT with FOV 6 × 6, 0.79 (95% CI: 0.75, 0.85) for CBCT with FOV 15 × 15, and 0.74 (95% CI: 0.69, 0.79) for MSCT. The Kappa value for interobserver agreement was highest for CBCT 6 × 6 among imaging modalities.ConclusionsCBCT with small FOV had higher diagnostic accuracy in detecting simulated maxillofacial fractures than MSCT. However, additional evidence based on in vivo studies is needed to confirm the superiority of CBCT on MSCT in diagnosis of maxillofacial traumatic fractures.© 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

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