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

作　　者：Yongxia YAO Wei QIN Bohang XING Na SHA Ting JIAO Zhe ZHAO 

机构地区：[1]School of Material Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China [2]Department of Prosthodontics,Shanghai Ninth People’s Hospital,College of Stomatology,School of Medicine,Shanghai Jiao Tong University,Shanghai 200011,China [3]Shanghai Key Laboratory of Stomatology&Shanghai Research Institute of Stomatology,National Clinical Research Center for Oral Diseases,Shanghai 200011,China [4]School of Chemical and Environment Engineering,Shanghai Institute of Technology,Shanghai 201418,China

出　　处：《Journal of Advanced Ceramics》2021年第1期39-48,共10页先进陶瓷（英文）

基　　金：the National Key R&D Program of China(2017YFB1103500,2017YFB1103502).

摘　　要：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 C02 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.

关 键 词：hydroxyapatite(HA) 3D printing sintering atmosphere mechanical property bioactivity digital light processing(DLP) 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术] TQ174.759[自动化与计算机技术—计算机科学与技术]