Development of three dimensional measuring program with frontal and lateral cephalometric radiographs: PART 1. Computation of the three-dimensional coordinates by compensation of the error of the head position in ordinary non-biplanar cephalostat.
- Author:
Geun Ho LEE
1
;
Sang Han LEE
;
Hyon Joong JANG
;
Tae Geon KWON
Author Information
1. Department of Oral & Maxillofacial Surgery, College of Dentistry, Kyungpook National University.
- Publication Type:Original Article
- Keywords:
Three dimensional coordinates;
Non-biplanar cephalostat
- MeSH:
Compensation and Redress*;
Head*;
Skull
- From:Journal of the Korean Association of Oral and Maxillofacial Surgeons
2001;27(3):214-220
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The clinical application of the three-dimensional radiographic technique had been limited to standard Broadbent-Bolton cephalometer with biplanar stereoradiography. We developed a new method for compensating the error of head position in ordinary non-biplanar cephalostat. It became to possible to use the three dimensional cephalogram commonly in clinical bases. 1. The method of methemetical compensation of head positioning error in non-biplanar condition was evaluated with dry skull. The error of the method of first and the second trial was 0.46+/-1.21, 0.33+/-0.90mm, which means the error of the head positioning correction in conventional cephalogram was within clinical acceptance. 2. The reproducibility of this system for clinical application was 0.54 mm (-2.99~2.26mm) which defines the absolute mean difference of the first and second trial. Compare to the The landmark identification error 1.2+/-1.6mm, the error of the measurement was within the range of landmark identification error. The result indicates the adequate clinical accuracy of the computation of three-dimensional coordinates by compensation of the error of the head position in ordinary non-biplanar cephalostat.
