[A study of the magnification of mandible pantomography image].
OBJECTIVE
To study the degree of magnification of mandible pantomography image.


METHODS
The pantomography of 50 mandible specimens marked with lead pellets were taken by TROPHY XL-90C. The distances between each markers on film and in specimen were measured.


RESULTS
The mean magnification(MM) of mandible pantomography image with TROPHY XL-90C was 1.22. MM of horizontal axle was 1.14. MM of vertical axle was 1.29. MM of horizontal axle was greatest (1.24) in the body of mandible,and lest (1.08) in genion. MM of vertical axle is similar among each regions. MM of vertical axle was greater than that of horizontal axle in all regions.


CONCLUSIONS
The MM parameters of mandible pantomography image were useful to estimate the size of mandible lesions and provided a basis for dental implant more exactly.
Department of Oral Radiology, Suzhou Stomatological Hospital, Jiangsu 215005, China.
J G
JG
Chen
X K
XK
Liu
L
L
Gu