Fig. 3.

Hydrogel scaffolds applied in BCoC platforms. (A) Stem cells laden hydrogel for layered osteochondral unit construction (Adapted from Ref. [92], with permission); (B) Biphase induction of iMPCs on one single hydrogel plate (Adapted from Ref. [93], with permission); (C) Adhesiveness of chemical modified alginate hydrogel (Adapted from Ref. [94], with permission); (D) High cellular viability after encapsulation in the microgel sphere, green and purple are indicated by the Calcein-AM/PI staining (Adapted from Ref. [101], with permission).