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 MethodsThe 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.
ResultsThe 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.
ConclusionTwo-dimensional cephalometric norms could be readily used for 3D quantitative assessment, if corrected for lateral cephalogram distortion.