PEEK Posterior Spinal Rod System
PEEK is used for the dynamic fixing system of the lumbar cervical bow root screw, including titanium alloy vertebral bow root screws and Peek elastic sticks. After completing the decompression of the spinal canal, it implanted the vertebral bow root screw. With a certain tension, the PEEK elastic rod is fixed to the root bow root nail. The purpose is to uninstall the pressure load of degeneration and joint dendritic joints while retaining normal activity. It can reduce the stress of the vertebral arched root screw in the bone interface, thereby reducing the risk of screws and breaking nails, which is also conducive to postoperative radiology evaluation.
Why PEEK polymer is ideal material for medical device?
PEEK(poly ether ether ketone) is confirmed biocompatibility material three decades ago.By the late 1990s, medical grade PEEK polymer had emerged as the leading high-performance thermoplastic candidate for replacing metal implant components, especially in orthopedics and trauma devices.Unfilled PEEK biomaterials can exhibit an elastic modulus ranging between 3 and 4 GPa, the modulus can be tailored to closely match cortical bone (18 GPa) or titanium alloy (110 GPa) by preparing carbon fiber-reinforced (CFR) composites with varying fiber length and orientation.Medical PEEK is increasingly used as biomaterials for the medical products.
Plus, for medical device parts,PEEK provides a great benefit: It saves weight,allows more design freedom and a greater functional integration, it also scores with X-ray transparency and elasticity which corresponds approximately to bone.
PEEK(Poly ether ether ketone) is the most well known and important member of the PAEK(Poly aryl ether ketone) group. This high-performance polymer material combines high-termperature resistance,good wear, and excellent mechanical properties. For instance, the glass transition temperature of PEEK is around 143℃ (289℉) ,and melts around 343℃ (662℉). The carbon fiber filled PEEK or glass fiber PEEK material have a useful operating temperature of up to 250℃ (482℉).
PEEK material is the best comprehensive performance of special engineering plastics. PEEK shows excellent overall performance due to its large amount of benezene ring structure in its molecule. At present, medical grade PEEK material is widely used in high-end medical device.