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Materials 2019, 12(5), 815; https://doi.org/10.3390/ma12050815

In Situ Controlled Surface Microstructure of 3D Printed Ti Alloy to Promote Its Osteointegration

1
Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia
2
School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
3
School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
4
Research Center for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia
5
Department of Mechanical and Materials Engineering, Universiti Kebangsaan Malaysia, Selangor 43600, Malaysia
*
Author to whom correspondence should be addressed.
Received: 15 February 2019 / Revised: 25 February 2019 / Accepted: 6 March 2019 / Published: 10 March 2019
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Abstract

It is well known that three-dimensional (3D) printing is an emerging technology used to produce customized implants and surface characteristics of implants, strongly deciding their osseointegration ability. In this study, Ti alloy microspheres were printed under selected rational printing parameters in order to tailor the surface micro-characteristics of the printed implants during additive manufacturing by an in situ, controlled way. The laser path and hatching space were responsible for the appearance of the stripy structure (S), while the bulbous structure (B) and bulbous–stripy composite surface (BS) were determined by contour scanning. A nano-sized structure could be superposed by hydrothermal treatment. The cytocompatibility was evaluated by culturing Mouse calvaria-derived preosteoblastic cells (MC3T3-E1). The results showed that three typical microstructured surfaces, S, B, and BS, could be achieved by varying the 3D printing parameters. Moreover, the osteogenic differentiation potential of the S, B, and BS surfaces could be significantly enhanced, and the addition of nano-sized structures could be further improved. The BS surface with nano-sized structure demonstrated the optimum osteogenic differentiation potential. The present research demonstrated an in situ, controlled way to tailor and optimize the surface structures in micro-size during the 3D printing process for an implant with higher osseointegration ability. View Full-Text
Keywords: 3D printing; Ti implants; osteogenesis; micro-nano structured surface; in situ control 3D printing; Ti implants; osteogenesis; micro-nano structured surface; in situ control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Shan, L.; Kadhum, A.A.H.; Al-Furjan, M.; Weng, W.; Gong, Y.; Cheng, K.; Zhou, M.; Dong, L.; Chen, G.; Takriff, M.S.; Sulong, A.B. In Situ Controlled Surface Microstructure of 3D Printed Ti Alloy to Promote Its Osteointegration. Materials 2019, 12, 815.

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