[Sassouni analysis--validation of normal values].

Analysis of cephalometric films may be problematic because of the variability of the reference planes used. This variability can, however, be reduced by using multiple reference planes, as was suggested by Sassouni. The films of 489 untreated children were analysed to validate the normal values recommended by Sassouni and to establish normals for a central European population. While this analysis did not confirm all of Sassouni's normal values, it corroborated his impression that the values do not significantly change with growth.