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

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Wang, Kai, Qiu, Mingbo, Jiao, Chen, Gu, Jiajun, Xie, Deqiao, Wang, Changjiang, Tang, Xiaobing, Wei, Zhen and Shen, Lida (2019) Study on defect-free debinding green body of ceramic formed by DLP technology. Ceramics International. ISSN 02728842

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Abstract

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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Dynamics, Control and Vehicle Research Group
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA0401 Materials of engineering and construction. Mechanics of materials
Depositing User: Chang Wang
Date Deposited: 01 Oct 2019 15:08
Last Modified: 23 Sep 2020 01:00
URI: http://sro.sussex.ac.uk/id/eprint/86500

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