抄録
The purpose of this study was to examine the reliability of applying the reference points proposed by Ritucci et al. for our the submentovertex (S-V) cephalogram, for radiographic technique. A cephalometer (Model C-166R: Tokyo-Emix Co. Ltd., Tokyo), along with an apparatus we developed, was utilized to obtain the S-V cephalograms. The S-V cephalograms of ten participants with normal occlusion (ages from 19 to 30 years) were obtained. The subjects were placed in a position with the central ray perpendicular to the Camper plane. Forty reference points on the ten films were plotted five times by an examiner, and once each by four examiners, for intra- and interexaminer reliability, respectively. Intra-examiner reliability was 0.53mm±0.25mm in the transverse plane and 0.83mm±0.79mm in the sagittal plane. Interexaminer reliability was 0.73mm±0.30mm in the transverse plane and 1.20mm±1.15mm in the sagittal plane. The most reliable point was the Foramina spinosa. This higher reliability in the intra-examiner than in the inter-examiner comparisons was statistically significant (p<0.01). Coefficient of correlations of the respective intra- and inter-examiner reliability of corresponding reference points between right and left sides were 0.97 and 0.99, which was a statistically significant finding (p<0.01). In conclusion, a clinically acceptable variation was noted in the reliability of the reference points, and each reference point had a characteristic distribution.
