[Development and study of three-dimensional CT scanning system for dental cast measurement and analysis].
OBJECTIVE
To develop a computer assisted CT scanning system for 3D dental cast measurement and to study its reliability.


METHODS
20 dental stone casts were scanned by helical CT and captured a series digital sliced radiographs of them. The program which was developed by Visual C 6.0 language and run under the Windows surroundings rebuilt the 3D graphics and measured the coordinate of the dental cast. These dental casts were scanned and measured to test the reliability of the system, contrasting with manual measurement.


RESULTS
There was no significant difference between 3D CT scanning and manual measurement (P > 0.05).


CONCLUSIONS
The system is a valuable computer assisted system for clinical diagnosis and treatment of malocclusion.
Yan
Bin
B
Dept. of Orthodontics, Affiliated Stomatological Hospital, Nanjing Medical University, Nanjing 210029, China.
Wang
Lin
L
Hu
Qiu-Sheng
QS
Pan
Lin
L
Yang
Kui
K
Bao
Xu-Dong
XD
D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008310:Malocclusion; D003765:Models, Dental; D015203:Reproducibility of Results