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Lei H, Zhou Z, Liu L, Gao C, Su Z, Tan Z, Feng P, Liu M, Zhou C, Fan Y, Zhang X. Icariin-loaded 3D-printed porous Ti6Al4V reconstruction rods for the treatment of necrotic femoral heads. Acta Biomater 2023; 169:625-640. [PMID: 37536494 DOI: 10.1016/j.actbio.2023.07.057] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/05/2023] [Accepted: 07/27/2023] [Indexed: 08/05/2023]
Abstract
Avascular necrosis of the femoral head is a prevalent hip joint disease. Due to the damage and destruction of the blood supply of the femoral head, the ischemic necrosis of bone cells and bone marrow leads to the structural changes and the collapse of the femoral head. In this study, an icariin-loaded 3D-printed porous Ti6Al4V reconstruction rod (referred to as reconstruction rod) was prepared by 3D printing technology. The mechanical validity of the reconstruction rod was verified by finite element analysis. Through infilling of mercapto hyaluronic acid hydrogel containing icariin into the porous structure, the loading of icariin was achieved. The biological efficacy of the reconstruction rod was confirmed through in vitro cell experiments, which demonstrated its ability to enhance MC3T3-E1 cell proliferation and facilitate cellular adhesion and spreading. The therapeutic efficacy of the reconstruction rod was validated in vivo through a femoral head necrosis model using animal experiments. The results demonstrated that the reconstruction rod facilitated osteogenesis and neovascularization, leading to effective osseointegration between bone and implant. This study provides innovative strategy for the treatment of early avascular necrosis of the femoral head. STATEMENT OF SIGNIFICANCE: The bioactivity of medical titanium alloy implants plays an important role in bone tissue engineering. This study proposed a medicine and device integrated designed porous Ti6Al4V reconstruction rod for avascular necrosis of the femoral head, whose macroscopic structure was customized by selective laser melting. The bionic porous structure of the reconstruction rod promoted the growth of bone tissue and formed an effective interface integration. Meanwhile, the loaded icariin promoted new bone and vascular regeneration, and increased the bone mass and bone density. Therefore, the implantation of reconstruction rod interfered with the further development of necrosis and provided a positive therapeutic effect. This study provides innovative strategies for the treatment of early avascular necrosis of femoral head.
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Affiliation(s)
- Haoyuan Lei
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China
| | - Zhigang Zhou
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu 610041, China; Department of Orthopaedics, Jiujiang First People's Hospital, Jiujiang 332000, Jiangxi, China
| | - Lei Liu
- Department of Orthopaedics, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
| | - Canyu Gao
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China
| | - Zixuan Su
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China
| | - Zhen Tan
- Department of Bone and Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Pin Feng
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ming Liu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Changchun Zhou
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China.
| | - Yujiang Fan
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, 610064, Chengdu, China
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