Abstract: Topology body apparatus having an extrusion head for extruding a settable plastic material, a mounting arm on which the extrusion head is mounted, a carriage bar on which the mounting arm is mounted, a base, extrusion head drive means for driving the extrusion head relative to the carriage bar, carriage drive means for driving the carriage bar relative to the base, and control means for controlling the extrusion head, the extrusion head drive means and the carriage drive means, separately and independently from one another, to procure three axes of movement of the extrusion head to progressively extrude and deposit portions of a three-dimensional solid body having a predetermined topography.