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High performance hydroxyapatite ceramics and a triply periodic minimum surface structure fabricated by digital light processing 3D printing

Authors :
Zhe Zhao
Na Sha
Bohang Xing
Ting Jiao
Yongxia Yao
Wei Qin
Source :
Journal of Advanced Ceramics, Vol 10, Iss 1, Pp 39-48 (2021)
Publication Year :
2021
Publisher :
Tsinghua University Press, 2021.

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.

Details

ISSN :
22278508 and 22264108
Volume :
10
Database :
OpenAIRE
Journal :
Journal of Advanced Ceramics
Accession number :
edsair.doi.dedup.....ac50e820c4b5fb81de161b63f2e888c3
Full Text :
https://doi.org/10.1007/s40145-020-0415-4