J. Mater. Sci. Technol. ›› 2023, Vol. 142: 34-44.DOI: 10.1016/j.jmst.2022.10.008

• Research article • Previous Articles     Next Articles

3D printed porous titanium filled with mineralized UV-responsive chitosan hydrogel promotes cell proliferation and osteogenesis in vitro

Jiazhao Yanga,1, Fan Liub,1, Changshun Zhouc, Hejie Lid, Gaolin Yangd, Shiyuan Fanga, In-Seop Leee, Yi Liub, Hao Baif, Cen Chenc,g,*   

  1. aThe First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China;
    bDepartment of Orthodontics, School of Stomatology, China Medical University, Shenyang 110002, China;
    cCollege of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China;
    dInstitute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou 310023, China;
    eInstitute of Human Materials, Suwon 16514, Republic of Korea;
    fState Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
    gZhejiang Provincial Key Laboratory of Silkworm Bioreactor and Biomedicine, Hangzhou 310018, China
  • Received:2022-06-27 Revised:2022-10-20 Accepted:2022-10-21 Online:2022-11-10
  • Contact: *E-mail address: . chencen@zstu.edu.cn (C. Chen)
  • About author:1These authors contributed equally to this work.

Abstract: The modification of 3D printed porous titanium (Ti), especially for the internal pore structure, is critical and has received more attention to promoting its osteogenesis for clinical use. Ultra-violet (UV) responsive chitosan (CSMA), as an injectable filling material, was firstly incorporated into porous Ti, and then CSMA was in-situ mineralized by carbon oxide (CO2) diffusion (CSMA/CaCO3). Their physical-chemical and biological properties were investigated in vitro. CaCO3 crystals within CSMA hydrogels were successfully deposited into pores of porous Ti, which exhibited favorable biocompatibility. Ti implants filled with CSMA/CaCO3 promoted adhesion and proliferation of bone mesenchymal stem cells (BMSCs). Moreover, Ti implant filled CSMA/CaCO3 hydrogels could increase alkaline phosphatase (ALP) activities, up-regulate osteopontin (OPN) and osteocalcin (OCN) expression levels, and enhance extracellular mineralization. 3D printed porous Ti filled with mineralized UV-responsive chitosan hydrogel could promote proliferation and osteogenesis of BMSCs, and have great potential for the modification of porous Ti implants in bone tissue engineering.

Key words: Porous titanium, Chitosan, Ultraviolet (UV)-responsive, Mineralization, Osteogenesis