Table 3.

Composite hydrogels for 3D printing neural scaffold manufacture.

Components	Printing Resolution	Printed Structure	Mechanical Properties	Printing Method	Reference
Collagen-fibroin hydrogel	500 μm	Double-layered 3D scaffold	-	Inkjet	[102]
Gelatin-alginate hydrogel	160 μm	Scaffold with void channel	-	Extrusion	[88]
PEG-PEGDA hydrogel	300 μm	Grid scaffold of stacking fibers	Young’s modulus of 1.01 ± 0.11 MPa	SLA	[105]
GelMA-PEGDA hydrogel	2.5 μm	Guidance conduit with four microchannels	Young’s modulus of 0.3~4.5 MPa	DLP	[28]
GelMA/GC-MS hydrogel	~545 ± 61μm	Grid scaffold of stacking fibers	-	Extrusion	[104]