A research team from National Taipei University of Technology has developed a surface hydrogenation treatment for 316L stainless steel, nickel-titanium alloy (NiTi), and titanium-aluminum-vanadium alloy (Ti6Al4V) to improve the long-term performance of metal implants in the body. In joint replacements and orthopedic surgeries, conventional metal implants often trigger the production of hydroxyl radicals (OH•) in surrounding tissues, causing local inflammation, pain, and delayed bone integration, which significantly affects patient recovery and quality of life.

Moreover, long-term wear and corrosion of implants in the body can shorten their lifespan and increase the risk of revision surgery. Using advanced hydrogenation technology, the research team successfully reduced OH• concentration around the implants, effectively decreasing inflammatory responses while improving surface hydrophilicity and ductility. This offers an innovative solution for clinical applications, demonstrating the tremendous potential of surface hydrogenation in enhancing the durability and clinical outcomes of orthopedic implants.

Hydrogenation Enhances Performance and Biocompatibility of Metal Implants

Experimental results show that hydrogenated 316L stainless steel exhibits significant improvements in corrosion resistance, surface hydrophilicity, and ductility, while also disrupting reactive oxygen species (ROS) balance in cancer cells to induce apoptosis. Hydrogenation of NiTi alloys markedly lowers Young’s modulus and hardness, achieving better mechanical matching with surrounding tissues, enhancing biocompatibility, and reducing tissue irritation and inflammatory responses. Ti6Al4V alloys after hydrogenation show mechanical properties closer to natural bone, with a significantly reduced water contact angle, promoting cell adhesion and bone integration. Additionally, increased hydroxylated hydroxyapatite formation supports osteocyte growth and regeneration. This technology not only mitigates inflammation around implants but also enhances implant durability and clinical safety, providing more efficient and reliable material solutions for artificial joints and orthopedic fixation devices, with broad market potential.

Future Applications and Commercialization Prospects

Professor Ren-Jie Zhong, principal investigator of the project, stated that this research represents a breakthrough in both materials science and medical applications, offering a new direction for the design and manufacture of medical implants. The team plans to continue exploring hydrogenation applications in additional metal alloys and collaborate with medical device manufacturers to commercialize the technology, developing implants that are efficient, safe, and easy to handle.

Preclinical studies are also planned to evaluate the biocompatibility and long-term stability of hydrogenated metal implants in animal models, providing reliable data for future clinical applications. Looking ahead, this technology is expected to improve post-surgical tissue repair, reduce infection risk, and expand into the global medical market, enhancing the overall quality and durability of joint replacements and orthopedic treatments, and providing patients with safer and more comfortable therapeutic experiences.

Resource: 《新創動態》突破性表面氫化技術 解決金屬植入物市場痛點