Figure 5.

The 3D printing model demonstrates the morphological characteristics of the customized nerve graft that mimics the microstructure of the peripheral nerve fasciculus. (a, b) Significant differences in the number and spatial distribution of the nerve fasciculus in the proximal and distal part of the nerve defect. (c) The 3D printing PLA model demonstrates the morphological features of the customized nerve graft, showing the nerve graft and the proximal and distal parts of the nerve defect are well matched. (d, e) The distribution of the two nerve tracts corresponding to the original Micro-MRI scan image. (a, b) Scale bar 1 cm. (c) Scale bar 2 cm. (d, f) Scale bar 1 mm.