Abstract
Digital panoramic radiography with tomosynthesis can be used to measure the distance between any 2 points with spatially oriented panoramic planar imaging technology. We determined measurement values (MVs) for mesio-distal crown diameter on tomosynthesis panoramic radiograph (TSPX) images and compared them with standard values (SVs) obtained from plaster models of children who had eruption of 4 permanent lower front teeth and persistence of deciduous lower lateral dentition. In addition, we determined the correction factor (α ) for each tooth type by dividing SV by MV and analyzed measurement accuracy. Moreover, we calculated the mesio-distal crown diameters of unerupted permanent lateral dentition predicted by multiplying α of the associated primary teeth, and compared those with predicted values obtained with the regression equation of Ono and prediction table of Moyers.The MV of the mesio-distal crown diameter of the lower deciduous molars showed a tendency to be greater, while that of the mesio-distal crown diameter of lower deciduous canine and permanent front teeth tended to be reduced in the TSPX findings. The mesio-distal crown diameter of permanent lateral dentition determined by TSPX was consistent with values determined by use of the regression equation of Ono and 50th percentile prediction values from the prediction table of Moyers, except for a female case of the left mandible. Therefore, space analysis using TSPX may be more effective than the regression equation of Ono and prediction table of Moyers, because dispersion of personal data can be expressed.
