Figure 4. Analysis of the two volumes obtained with or without the 3D-printed model.

To assess the inconsistency between the volumes obtained with or without the printed model and its magnitude, we measured the conjoint and disjoint volumes. The volume obtained using the 3D prototype was 92.4 ± 6% (blue line) of the volume obtained without the 3D model (green line). The volume obtained using the 3D-printed model included a 0.27 ± 0.1 mL that was outside the volume obtained without the aid of the 3D-printed model. The numerals 1-10 indicate individual cases.