Bone scaffolds require both good bioactivity and mechanical properties to keep shape and promote bone repair.In this work,T-ZnOw enhanced biphasic calcium phosphate(BCP)scaffolds with triply periodic minimal surface(TPMS)-based double-layer porous structure were fabricated by digital light processing(DLP)with high precision.Property of suspension was first discussed to obtain better printing quality.After sintering,T-ZnOw reacts with β-tricalcium phosphate(β-TCP)to form Ca19Zn2(PO4)14,and inhibits the phase transition to α-TCP.With the content of T-ZnOw increasing from 0 to 2 wt％,the flexural strength increases from 40.9 to 68.5 MPa because the four-needle whiskers can disperse stress,and have the effect of pulling out as well as fracture toughening.However,excessive whiskers will reduce the cure depth,and cause more printing defects,thus reducing the mechanical strength.Besides,T-ZnOw accelerates the deposition of apatite,and the sample with 2 wt％T-ZnOw shows the fastest mineralization rate.The good biocompatibility has been proved by cell proliferation test.Results confirmed that doping T-ZnOw can improve the mechanical strength of BCP scaffolds,and keep good biological property,which provides a new strategy for better bone repair.

Ming-Zhu PAN;Shuai-Bin HUA;Jia-Min WU;Xi YUAN;Ze-Lin DENG;Jun XIAO;Yu-Sheng SHI

State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Engineering Research Center of Ceramic Materials for Additive Manufacturing,Ministry of Education,Wuhan 430074,China;Department of Orthopedic Surgery,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China

先进陶瓷（英文版）

[1]Ming-Zhu PAN;Shuai-Bin HUA;Jia-Min WU;Xi YUAN;Ze-Lin DENG;Jun XIAO;Yu-Sheng SHI-.Preparation and properties of T-ZnOw enhanced BCP scaffolds with double-layer structure by digital light processing)[J].先进陶瓷（英文版）,2022(04):570-581

Ca19Zn2

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