Orthopedic implants refer to devices used for the treatment, repair or replacement of human orthopedic diseases to improve or restore their functions. Usually, devices and materials that are partially or completely implanted into the human body to replace, support, or repair bones, joints, cartilage and other tissues during surgery or after surgery. Due to its shape memory effect, super elasticity, fatigue resistance, abrasion resistance, corrosion resistance, and good biocompatibility, nickel-titanium alloys have been widely used in orthopedic clinics in recent years and are called "magic metals".
Memory alloys (nitinol alloys) are widely used in the field of medical devices based on their unique superelasticity and shape memory effects.
Among them, superelasticity is the elastic strain under large deformation, which is applied to vascular and cavity interventional instruments, orthodontic wires, root canal instruments, etc.; shape memory effect can realize easy deformation at low temperature and self-recovery at body temperature, and is applied to thermal activation Orthodontic wires, orthopedics, orthopedics, sutures, etc. In addition, diversified surface modification technologies can be used to improve the biocompatibility, corrosion resistance, friction and wear properties of nickel-titanium alloys, optimize product performance, and expand its application range in medical device products.
The development and application of nickel-titanium alloys in spinal products such as intervertebral fusion cages can be one of the sustainable development ideas of some companies in this field. However, the core technology of nickel-titanium alloy products is no longer in the material technology itself, but in the function and design of the product fixed in the correction system. Therefore, functional development and design is the primary task for the application of Nitinol in high-end orthopedic implant products in the future, such as the design and development of 3D printed Nitinol spinal correction and fixation systems. Technology and industry are brewing new breakthroughs and changes. Advanced materials are regarded as the foundation and key of industrial competitiveness. The future development and application of nickel-titanium alloys will promote the orthopedic implant medical device industry to a higher level.
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