“…Cuttlefish bone, mainly composed of aragonite inorganic mineral and β-chitin organic matter, has an exquisite three-dimensional interconnected pore channel structure, with a porosity of about 93% and pore diameters varying from 200 to 600 μm . Its special natural porous skeletal structure can promote the regeneration of newly formed bone tissue, and thus it has been widely used for bone tissue engineering. , β-Chitin from cuttlefish bone is the second most abundant natural polymeric polysaccharide after cellulose and consists of N -acetyl- d -glucosamine linked by β-1,4-glycosidic bonds, , which has a parallel arrangement of molecular chains resulting in weak intermolecular hydrogen bonding, high affinity for solvents, and high reactivity. − β-Chitin has received much attention in the field of tissue engineering due to its biodegradability, biocompatibility, nontoxicity, and promotion of mineralization (calcification). − However, the application of cuttlefish bone in tendon–bone healing is limited by the fact that the inorganic minerals in cuttlefish bone do not match the specific gradient structure of tendon–bone healing. Therefore, this work wanted to extract the organic matter while preserving the special natural porous skeletal structure of cuttlefish bone and use it as a template for the deposition of mineralized inorganic minerals to construct a gradient mineral volume scaffold with a special natural porous skeletal structure.…”