High performance hydroxyapatite (HA) ceramics with excellent densification and mechanical properties were successfully fabricated by digital light processing (DLP) three-dimensional (3D) printing technology. It was found that the sintering atmosphere of wet CO₂ can dramatically improve the densification process and thus lead to better mechanical properties. HA ceramics with a relative density of 97.12% and a three-point bending strength of 92.4 MPa can be achieved at a sintering temperature of 1300 , which makes a solid foundation for application ℃ in bone engineering. Furthermore, a relatively high compressive strength of 4.09 MPa can be also achieved for a DLP-printed p-cell triply periodic minimum surface (TPMS) structure with a porosity of 74%, which meets the requirement of cancellous bone substitutes. A further cell proliferation test demonstrated that the sintering atmosphere of wet CO₂ led to improve cell vitality after 7 days of cell culture Moreover, with the possible benefit from the bio-inspired structure, the 3D-printed TPMS structure significantly improved the cell vitality, which is crucial for early osteogenesis and osteointegration.

通过数字光处理（DLP）三维（3D）打印技术成功制造了具有优异致密化和机械性能的高性能羟基磷灰石（HA）陶瓷。发现湿CO ₂的烧结气氛可以极大地改善致密化过程，从而带来更好的机械性能。在1300的烧结温度下可获得相对密度为97.12％，三点弯曲强度为92.4 MPa的HA陶瓷，为℃在骨工程中的应用奠定了基础。此外，对于DLP印刷的具有74％的孔隙率的p-cell三重周期周期性最小表面（TPMS）结构，也能达到4.09 MPa的相对较高的抗压强度，满足了松质骨替代物的要求。进一步的细胞增殖测试表明，湿式CO ₂的烧结气氛 在培养7天后，可提高细胞活力。此外，通过生物启发的结构可能带来的好处，3D打印的TPMS结构可显着提高细胞活力，这对于早期成骨和骨整合至关重要。