@article{YAO2021, 
author = {Yongxia YAO and Wei QIN and Bohang XING and Na SHA and Ting JIAO and Zhe ZHAO},
title = {High performance hydroxyapatite ceramics and a triply periodic minimum surface structure fabricated by digital light processing 3D printing},
year = {2021},
journal = {Journal of Advanced Ceramics},
volume = {10},
number = {1},
pages = {39-48},
keywords = {hydroxyapatite (HA), 3D printing, sintering atmosphere, mechanical property, bioactivity, digital light processing (DLP)},
url = {https://www.sciopen.com/article/10.1007/s40145-020-0415-4},
doi = {10.1007/s40145-020-0415-4},
abstract = {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.}
}