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KMID : 1024020230530040375
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Imaging Science in Dentistry
2023 Volume.53 No. 4 p.375 ~ p.381
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Diagnostic performance of stitched and non-stitched cross-sectional cone-beam computed tomography images of a non-displaced fracture of ovine mandibular bone
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Farzane Ostovarrad
Sadra Masali Markiyeh
Zahra Dalili Kajan
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Abstract
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Purpose: This study assessed the diagnostic performance of stitched and non-stitched cross-sectional cone-beam computed tomography (CBCT) images of non-displaced ovine mandibular fractures.
Materials and Methods: In this ex vivo study, non-displaced fractures were artificially created in 10 ovine mandibles (20 hemi-mandibles) using a hammer. The control group comprised 8 hemi-mandibles. The non-displaced fracture lines were oblique or vertical, <0.5 mm wide, 10-20 mm long, and only in the buccal or lingual cortex. Fracture lines in the ramus and posterior mandible were created to be at the interface or borders of the 2 stitched images. CBCT images were obtained from the specimens with an 80 mm × 80 mm field of view before and after fracture induction.
OnDemand software (Cybermed, Seoul, Korea) was used for stitching the CBCT images. Four observers evaluated 56 (28 stitched and 28 non-stitched) images to detect fracture lines. The diagnostic performance of stitched and non-stitched images was assessed by calculating the area under the receiver operating characteristic curve (AUC).
Sensitivity and specificity values were also calculated (alpha = 0.05).
Results: The AUC was calculated to be 0.862 and 0.825 for the stitched and non-stitched images, respectively (P = 0.747). The sensitivity and specificity were 90% and 75% for the non-stitched images and 85% and 87% for the stitched images, respectively. The inter-observer reliability was shown by a Fleiss kappa coefficient of 0.79, indicating good agreement.
Conclusion: No significant difference was found in the diagnostic performance of stitched and non-stitched cross- sectional CBCT images of non-displaced fractures of the ovine mandible.
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KEYWORD
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Cone-Beam Computed Tomography, Fractures, Bone, Mandible, Imaging, Three dimensional
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