Table 1.

Limitations of various NGC fabricating techniques

Fabricating technique	Limitation	Reference
Electrospinning	Poor repeatability and customizability; random and highly disordered fiber production	[ 18 ]
Freeze drying	Irregularly shaped pore	[ 17 ]
Gas foaming	Non‐porous external surface; poor interconnectivity	[ 16 ]
Phase separation	Material is limited to specific polymer	[ 15 ]
Solvent casting	Highly toxic solvent; low porosity (<50%); irregularly shaped pore	[ 14 ]
Common limitations	Inability to control porosity, pore size, and interconnectivity of NGC; poor repeatability; no determination of multilayer structure	[ 19 ]

Abbreviations: NGC, nerve guide conduit.