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Since its first clinical application in 1999, polyether ether ketone has stood out among many medical materials due to its unique properties. PEEK wire is a semi-crystalline aromatic crystalline thermoplastic polymer and a member of special engineering plastics. It has high heat resistance (over 260°C), excellent mechanical properties, and chemical stability, enabling it to replace traditional materials such as metals and ceramics in many special fields.
Lower, bone-similar elastic modulus
It can prevent the stress shielding effect, allowing the surrounding bone to maintain its original strength.
Visibility
It can be seen through X-rays and does not show up in CT and MRI scans, making it easier to assess bone growth and healing processes; in cases where implant visibility is required, it can also be achieved through modification.
Moreover, with strong radiation resistance, PEEK wire has a very stable chemical structure, allowing PEEK wire components to function normally under high doses of ionizing radiation.
Excellent sterilizability
It can maintain its original properties unchanged even with long-term exposure to steam, ethylene oxide, and gamma rays. PEEK wire can be used long-term at harsh temperatures up to 250°C, with instantaneous use temperatures reaching 300°C.
Biocompatibility
Biocompatibility is the fundamental criterion for evaluating whether a material is suitable for human implantation. The material must be non-cytotoxic, non-mutagenic, non-carcinogenic, and should not cause allergic reactions. Implant-grade PEEK wire is highly pure, meeting ISO10993 requirements, and has excellent biocompatibility without any side effects.
Adjustable mechanical properties
Different additives, including carbon fibers, barium sulfate, and glass fibers, can be added to meet specific application needs. For example, adding short carbon fibers to implant-grade PEEK wire polymers can improve their friction and wear performance.
Greater design freedom
It can be easily machined into semi-finished blanks or produced through injection molding. PEEK wire can be formed through injection molding, extrusion molding, and 3D printing technologies.
Medical-grade PEEK wire materials can be divided into ordinary medical-grade PEEK wire and implant-grade PEEK wire based on their purity and material properties.
Ordinary medical-grade PEEK wire
This grade of PEEK wire materials is currently widely used in external fixation equipment that comes into contact with the skin (such as limb fixation braces), short-term interventional catheters, and non-implant consumables like oral Marlon bridges.
These application scenarios generally require PEEK wire materials to have a certain degree of biosafety, such as being non-cytotoxic, non-allergenic, non-irritating, or causing no intracutaneous reactions. They must also meet physical and chemical performance requirements specific to each product.
Implant-grade PEEK wire
This type of material is often used in orthopedic implants, neurosurgical repair patches, cardiovascular products, and so on. In recent years, some manufacturers have been using modified PEEK wire materials to produce high-mechanical-performance products like dental implants and trauma bone plates. In addition to meeting the biosafety requirements of ordinary medical-grade PEEK wire, implant-grade PEEK wire must also meet stricter biocompatibility requirements, such as systemic toxicity, genetic toxicity, carcinogenicity, hemocompatibility, and implant reactions. It must also comply with the requirements of the "YY/T 0660 Standard Specification for Polyether Ether Ketone (PEEK wire) Polymers for Surgical Implants".
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