2021 Volume 59 Issue 1 Pages 20-25
A method for predicting the proximal coronal width of permanent teeth from panoramic X-rays and dentition models during the deciduous stage was devised. The subjects were 24 orthodontic patients (5 boys and 19 girls) who had panoramic X-rays and dental models taken during the deciduous dentition and who had dental models of the permanent dentition in the completed dentition, and their average age was 5 years and 8 months (4 years and 3 months to 6 years and 9 months).
The results showed that the predicted diameters of the proximal crown widths obtained from panoramic X-rays had a magnification rate of 1.00±0.08 and an error of 0.38-1.00 mm compared to the measured values. There was a correlation between all of the predicted and measured values.
These results suggest that the diameter of the crown proximal width of a permanent tooth can be predicted by the crown proximal width of a successor permanent tooth (panoramic X-ray) / ((crown proximal width of a deciduous tooth (panoramic X-ray) / crown proximal width of a deciduous tooth (deciduous tooth row model)).
