“…It can not only fabricate 3D bone‐substitute scaffolds suitable to different patient according to their needs quickly and accurately, but precisely control the porous structure and porosity of scaffolds (Hospodiuk, Dey, Sosnoski, & Ozbolat, ; Richards et al, ; Woodruff et al, ; Zheng et al, ). It has been demonstrated that a great amount of materials can be used to prepare porous scaffolds for bone tissue engineering, such as poly(ε‐caprolactone) (Shor, Guceri, Wen, Gandhi, & Sun, ), poly (lactic acid) (Zhang et al, ), gelatin (Gel) (Du et al, ), hydroxyapatite (HA) (Luo, Chen, Shi, & Ma, ), chitosan (CHI) (Reed et al, ) and so on. However, these scaffolds are not perfect due to their limited biocompatibility.…”