How to cite this article: Mondal D, Nguyen L, Oh I-H, Lee B-T. 2013. Microstructure and biocompatibility of composite biomaterials fabricated from titanium and tricalcium phosphate by spark plasma sintering. J Biomed Mater Res Part A 2013:101A:1489–1501.
Microstructure and biocompatibility of composite biomaterials fabricated from titanium and tricalcium phosphate by spark plasma sintering†
Article first published online: 7 NOV 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Biomedical Materials Research Part A
Volume 101A, Issue 5, pages 1489–1501, May 2013
How to Cite
Mondal, D., Nguyen, L., Oh, I.-H. and Lee, B.-T. (2013), Microstructure and biocompatibility of composite biomaterials fabricated from titanium and tricalcium phosphate by spark plasma sintering. J. Biomed. Mater. Res., 101A: 1489–1501. doi: 10.1002/jbm.a.34455
- Issue published online: 25 MAR 2013
- Article first published online: 7 NOV 2012
- Manuscript Accepted: 14 SEP 2012
- Manuscript Revised: 11 SEP 2012
- Manuscript Received: 31 MAY 2012
- Mid-career Researcher Program through NRF grant funded by the MEST. Grant Number: 2009-0092808
- tricalcium phosphate;
- hard tissue replacement
Important issues in developing hydroxyapatite (HAp)- and titanium (Ti)-based composite biomaterials for orthopedic or dental devices include the dissociation of HAp during fabrication and its influences in the microstructure and biocompatibility of the final composite. During the densification by sintering of HAp/Ti composites, Ti reacts with OH freed from HAp to form TiO2 thus dissociated HAp into Ca3(PO4)2, CaO, CaTiO3, TiP, and so forth. To inhibit this reaction, composites were fabricated with Ti and 30, 50, and 70 vol % β-tricalcium phosphate (β-TCP) instead of HAp by spark plasma sintering at 1200°C. It has been observed that after sintering at 1200°C, Ti also reacted with TCP, but unlike HAp/Ti composites, the final TCP/Ti composites contained significant amounts of unreacted TCP and Ti phases. The initial 70 vol % TCP/Ti composite showed compressive strength of 388.5 MPa, Young's modulus of 3.23 GPa, and Vickers hardness of 361.9 HV after sintering. The in vitro cytotoxicity and proliferation of osteoblast cells on the composites surfaces showed that the addition of a higher amount of TCP with Ti was beneficial by increasing cell viability, cell–composite attachment and proliferation. Osteopontin and collagen type II protein expression from osteoblasts cultured onto the 70% TCP–Ti composite was also higher than other composites and pure Ti. In vivo study verified that within 3 months of implantation in an animal body, 70% TCP–Ti had an excellent bone–implant interface compared with a pure Ti metal implant. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.