Projection-based 3D bioprinting for hydrogel scaffold manufacturing

<正>Projection-based 3D bioprinting (PBP):a powerful method to fabricate 3D cellular structures Three-dimensional (3D) bioprinting has played an important role in tissue engineering and regenerative medicine areas over the past decade [1]. Different from traditional cell cultures in Petri dishes, 3D bioprinting can build bionic structures with a better potential to become artificial organ substitutes [2–4]. With the development of photocurable biomaterials, the projection-based 3D printing method has been successfully applied in biological research [5, 6]. It possesses significant advantages in precision and speed due to its unique manufacturing principle. On the one hand,