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KMID : 1024020120420040201
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Imaging Science in Dentistry
2012 Volume.42 No. 4 p.201 ~ p.205
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Comparison of conventional lateral cephalograms with corresponding CBCT radiographs
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Park Chang-Seo
Park Jae-Kyu
Kim Hui-Jun
Han Sang-Sun
Jeong Ho-Gul
Park Hyok
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Abstract
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Purpose: This study was performed to assess the compatibility of cone beam computed tomography (CBCT) synthesized cephalograms with conventional cephalograms, and to find a method for obtaining normative values for three-dimensional (3D) assessments. Materials and Methods: The sample group consisted of 10 adults with normal occlusion and well-balanced faces. They were imaged using conventional and CBCT cephalograms. The CBCT cephalograms were synthesized from the CBCT data using OnDemand 3D software. Twenty-one angular and 12 linear measurements from each imaging modality were compared and analyzed using paired-t test. Results: The linear measurements between the two imaging modalities were not statistically different (p>0.05) except for the U1 to facial plane distance. The angular measurements between the two imaging modalities were not statistically different (p>0.05) with the exception of the gonial angle, ANB difference, and facial convexity. Conclusion: Two-dimensional cephalometric norms could be readily used for 3D quantitative assessment, if corrected for lateral cephalogram distortion.
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KEYWORD
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Cone-Beam Computed Tomography, Cephalometry
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