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CERI-D-19-08380R1 Debinding DLP .pdf (1.82 MB)

Study on defect-free debinding green body of ceramic formed by DLP technology

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posted on 2023-06-09, 19:11 authored by Kai Wang, Mingbo Qiu, Chen Jiao, Jiajun Gu, Deqiao Xie, Chang WangChang Wang, Xiaobing Tang, Zhen Wei, Lida Shen
Zirconia and hydroxyapatite(HA) are two typical implant materials, which have the advantages of excellent mechanical strength and good biological activity respectively. It was found that composite material had good biocompatibility and mechanical strength compared to the single material. In this paper, the porous scaffolds of ZrO2/HA composite were formed by digital light processing (DLP) technology and their performance were evaluated. Cell experiments showed that the addition of HA had a positive effect on cell proliferation and differentiation. Mechanical tests showed that the composite scaffold with 10?wt% HA had the best compressive capacity due to the pinning and bridging effect of a small amount of HA grains. When scaffolds were immersed in the simulated body fluid (SBF), the compressive strengths of the composite scaffolds decreased within the first 14 days and gradually increased after 14 days. The reason for this phenomenon was the degradation of calcium phosphate components and the deposition of apatite. By the 28th day, the compressive strengths of all the composite scaffolds increased to over 20?MPa, close to that of the zirconia scaffolds during the same period (25?MPa). The compressive strengths of all scaffolds met the requirement of cancellous bone during the entire soaking period, and the composite scaffolds have potential application value in bone repair.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Ceramics International

ISSN

02728842

Publisher

Elsevier

Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Dynamics, Control and Vehicle Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-10-01

First Open Access (FOA) Date

2020-09-23

First Compliant Deposit (FCD) Date

2019-09-27

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