TI : Evaluation of the reproducibility in cephalography using roentgenocephalometrics and photographic subtraction
AU : Jeon SD; Nha KS
AD : Department of Dental Radiology, College of Dentistry, Pusan National University
SO : JKAOMFR, 1994;24(2):347-359
ISSN : 1225-049X
PY : 1994
LA : KOREAN
CP : KOREA
AB : The reproducibility of cephalography in repeated exposures were studied by tracing and photographic subtraction. The materials consisted of 50 pairs of 'same day' radiograph taken under identical conditions. The evaluation included skull, cervical column, hyoid bone, pharynx, tongue, soft tissue profile resulting 43 items in tracing, and 19 items in photographic subtraction.
The results obtained from the differences between each pair were as follows:
1. The means and standard deviations by tracing if skull, cervical column, hyoid bone, pharynx, tongue, soft tissue profile were 0.34?0.62mm, 1.02±1.59mm, 1.37±1.78mm, 0.55±1.16mm, 0.51±1.51mm, 0.15?0.36mm each.
2. The means and standard deviations by photographic subtraction of skull, cervical column, hyoid bone, pharynx, tongue were 0.09±0.35mm, 0.70±0.95mm, 1.22±1.33mm, 0.53±0.86mm, 0.27±0.41mm each.