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The Excellent Properties of Medical PEEK as an Implantable Medical Device


Since its first clinical application in 1999, medical PEEK has stood out among many medical materials due to its unique characteristics. According to predictions by Radiant Insights analysts, the global medical PEEK market is expected to continue developing at an average annual compound growth rate of 10.43% from 2017 to 2022. As a new type of medical implant material, it has gained recognition from many surgeons and medical device companies and has gained considerable popularity. Its applications are becoming more widespread in areas such as artificial spines, artificial teeth, and artificial skulls.


Biocompatibility: Non-toxic, Safe, and Hypoallergenic


First and foremost, medical PEEK has excellent biocompatibility. Biocompatibility is the most basic criterion for determining whether a material is suitable for implantation in the human body. The material must be non-toxic, non-mutagenic, non-carcinogenic, and not cause allergies. Implantable medical PEEK has undergone complete biocompatibility testing by independent testing institutions abroad in strict accordance with ISO 10993 requirements and complies with the "YY/T 0660 Standard Specifications for Medical PEEK Polymer for Surgical Implants." The results show that medical PEEK has good biocompatibility and no side effects.


Lower Elastic Modulus: No Stress Shielding, Maintaining Bone Strength Around the Implant


Wolf's Law states that bones grow where needed and are absorbed where not needed, which means the growth, absorption, and remodeling of bones are related to their stress state. Compared to metal implants, the elastic modulus of medical PEEK is closer to that of cortical bone. Particularly, the elastic modulus of carbon fiber-reinforced medical PEEK is even more compatible with cortical bone. This close or matching elastic modulus weakens or eliminates the stress shielding effect to some extent, which is beneficial for the bone fusion between the implant and bone tissue, ensuring the long-term stability of the medical PEEK implant.


Visibility: Clear X-ray Imaging and Easier Postoperative Tracking


Medical PEEK overcomes the shortcomings of metal materials, such as stress shielding and radiation artifacts. It can be seen clearly through X-rays, CT, or MRI scans without generating artifacts. This helps doctors adjust the implant position during surgery and allows easy tracking of the healing process after surgery, thus effectively monitoring bone growth and healing.


Wear Resistance: Preventing Inflammation and Bone Resorption Issues


Compared to stainless steel, titanium alloys, and ultra-high molecular weight polyethylene implants, medical PEEK and its composites exhibit excellent wear resistance, effectively preventing issues such as inflammation and bone resorption caused by wear particles around the implant. Therefore, medical PEEK is considered one of the candidate materials to replace traditional implants in orthopedic applications.

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