Abstract: Objective: The purpose of this study was to analyze the deference between cephalometric measurements and cone-beam computed tomography(CBCT)-based measurements of the palatal bone thickness.Methods:Thirty subjects of CBCT images and lateral cephalograms were selected. Palatal bone thicknesses were measured anteroposteriorly from between the first and second premolars to between the first and second molars using both imaging methods, and also laterally from 1.5 mm off-center to 10 mm off-center in the CBCT images. Repeated measure was used to examine the differences between the measurements. Results:The 5-mm off-center of the palatal bone was thinnest. The 5-mm off-center measurements were the only ones for which there were no statistically significant differences compared with the cephalometric measurements in all anteroposterior areas. The measurements at 1.5 mm off-center were significantly thicker than the cephalometric measurements only from the area between the second premolar and the first molar to the area between the first and second molars. Conclusions:Among the areas measured, the bone at 5 mm off-center is most likely to be depicted in cephalograms as palatal bone contours.

Key words: CBCT, Cephalometric, The palatal bone thickness