Metals Advances ›› 2026, Vol. 42: 49-65.DOI: 10.1016/j.metadv.2026.02.006

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Advancements in design, surface modification, and spinal applications of biomedical metallic materials for bone repair

Shiqiang Songa,1, Lizhu Tangb,c,1, Longjian Huangd,e,1, Yuanli Luoa, Huiqing Yanga, Chengliang Yanga,f,*()   

  1. a Department of Orthopedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
    b Jinan University, Guangzhou 511486, China
    c Department of Interventional Oncology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
    d Youjiang Medical University for Nationalities, Baise 533000, China
    e West Guangxi Key Laboratory for Prevention and Treatment of High-Incidence Diseases, Youjiang Medical University for Nationalities, Baise 533000, China
    f Guangxi Key Laboratory for Biomedical Materials Research, Baise 533000, China
  • Received:2025-08-08 Revised:2025-10-19 Accepted:2025-10-20 Online:2026-04-10 Published:2026-02-07
  • Contact: Department of Orthopedics, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China. E-mail address: yangchengliang@ymcn.edu.cn (C. Yang).
  • About author:First author contact:

    1 These authors contributed equally to this work.

Abstract:

Bone defect repair imposes stringent requirements on biomaterials, including mechanical compatibility, biocompatibility, osteoinduction/osteoconduction, and biodegradability. Biomedical metallic materials serve as core solutions for bone reconstruction due to their exceptional mechanical strength, particularly in high-load-bearing regions such as the spine. To address metallic surface bioinertness, various surface modification technologies are widely employed to significantly enhance osseointegration, antibacterial efficacy, and corrosion resistance through micro/nano-structuring and bioactive coatings. 3D printing enables customized fabrication of porous metallic implants, optimizing mechanical compatibility and imaging compatibility. In spinal applications, metallic materials are extensively utilized in internal fixation systems, interbody cages, artificial discs/vertebrae, correction systems, and tumor prostheses. Their design and modification directly impact fusion success rates, anti-subsidence capability, and long-term stability. Despite significant progress, challenges remain in degradation rate matching, long-term biosafety, multifunctional synergy, and stability in complex physiological environments. Future efforts should focus on smart materials, precision surface engineering, AI-assisted personalized design, and long-term clinical evaluation to advance metallic bone-repair materials toward superior performance.

Key words: Biomedical metallic materials, Bone repair, Surface modification, Spinal implants, 3D printing, Osseointegration