[Photostereogrammetry in plastic surgery]

Stereophotogrammetry has been used lately for accurate presentation of changes and irregularities of the face. Plaster of Paris casts of the faces of patients with mandibular prognathism were prepared prior to and six months following surgery. The casts were photographed with an adapted phototheodolite IGF f - 158 mm/13 X 18 cm. The stand with forced centering and a maximal base of 170 mm was constructed at the Institute for Research of Materials and Constructions SRS. The contour plots were drawn on a 1:1 scale using a Topocart B autograph. The contours were plotted with a 2 mm interspace. On the stereophotogramme obtained in this fashion the features of the face and their changes after the operation are accurately demonstrated by the contour lines.