Abstract
A roentogen cephalogram is one of many clinical examinations that are used in pedodontic practice but there are many problems involving danger with X-ray exposure, the limitation of the area to be photographed, ect.
We therefore studied whether we could substitute the tracing of a photograph taken with a modefied type of commercially cheaper facial standarized photography and made with a facial standarized photographic analyser for roentogen cephalograms. As a result, we obtained the following conclusions
1. We found out that the number of coincident landmarks on the soft tissue and the hard tissue of the lateral cephalogam with a 5 degree oblique cephlogram was the same statistcally in an X, Y coordinate system at Pn and Fh reference point.
2. Coincidence between the landmarks on the soft tissue of the left side 5 degree facial standarized photograph and lateral cephalogram was higher. We found that we were able to substitute the left side 5 degree oblique facial standarized photograph for the lateral cephalogram.
3. Therefore, we discovered that we encountered a higher possibility of being able to predict landmarks on the hard tissue from the left side 5 degree oblique facial standarized photograph.
4. Landmarks coincident to both the left side 5 degree oblique facial standarized photograph and on the lateral cephalogram were points of Fh, No, Pn, Ul, Ch and non coincident landmarks are points of Sbn, Ls, Ll, Sc.
5. We found out that the reliability of non coincident landmarks on the left side 5 degree oblique facial standarized photograph with on lateral cephogram was higher on the left side 5 degree oblique facial standarized photograph than on the lateral cephalogram.
