The microstructure of biomaterial scaffolds such as pore structure plays an important role in cellular behaviors in cartilage tissue engineering. 3D printing can be applied to fabricate tissue engineering scaffolds with well-designed structures. Poly(ε-caprolactone)(PCL) is widely used in tissue engineering due to its biocompatibility and capability of supporting cell adhesion, proliferation and extracellular matrix production.PCL porous scaffolds were designed and fabricated by 3D printing. The scaffolds h...