Study of Distance from the Upper Incisor to the Carina in Children Using X-ray

Lee, Kun Moo; Jeong, Soung Hoan; Lee, Jeong Han; Cheong, Soon Ho; Choe, Young Kyun; Kim, Young Jae; Shin, Chee Mahn

Abstract

BACKGROUND: There was a difference between the past and the present in distance from the upper incisor to the carina in children. This study was performed to evaluate the distance from the upper incisor to the carina and correlation of it with age, the weight and height in korean children from 2 to 8 years old.
METHODS
Two hundred twenty two children from 2 to 8 years old scheduled for receiving tonsillectomy or adenoidectomy were evaluated for the study by age groups (every 6 months from 2 to 8 years old). The X-ray was used for evaluation of distance from the incisor to the carina. The distance from the upper incisor to C7 was calculated on neck lateral view and distance from C7 to the carina was calculated on chest PA. Both distance were added and served as the distance from upper incisor to the carina.
RESULTS
The coefficient of determination of the distance from the upper incisor to the carina was highest according to height. The regression equation of the distance from the upper incisor to the carina using height was Y (cm) = 0.15 X (cm) and R2 = 0.70 (Y: the upper incisor to the carina, X: the height).
CONCLUSIONS
We found that the distance from the upper incisor to the carina in children correlated with both the weight and height in children and the height was the highest correlation with distance.