1. A method for generating an individual model of a jawbone segment, wherein only one tomogram of the jawbone segment is made in a direction perpendicular to the longitudinal axis of the jawbone segment, said method comprising the following image processing steps: i) determining the boundary of the jawbone and the surrounding tissue based on the tomogram; ii) transforming the boundary between the jawbone and the surrounding tissue into a two-dimensional profile; and iii) extruding the two-dimensional profile in the direction of the longitudinal axis of the jawbone segment to obtain a three-dimensional volume body model of the jawbone segment.