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Since implantable materials need to remain inside the human body for extended periods, they must meet high standards for biocompatibility, fatigue strength, resistance to wear and corrosion, among other characteristics. Previously, medical titanium and its alloys were considered ideal for medical implants. However, with the swift advancement of material science worldwide, the use of polymer materials in medicine is increasingly widespread. Medical grade PEEK, with its distinct properties among various medical materials, stands out as a novel type of implant material, gaining recognition from numerous surgeons and medical device manufacturers. This article will discuss the superior qualities of Medical grade PEEK when used as a medical device implant.
PEEK exhibits outstanding biocompatibility. Biocompatibility is the fundamental criterion for determining a material's suitability for human implantation; the material must not be cytotoxic, mutagenic, carcinogenic, or allergenic. Medical grade PEEK has been thoroughly tested for biocompatibility in strict accordance with ISO10993 standards at an independent international testing facility. The findings affirm that it is highly biocompatible, presenting no adverse effects.
The use of metallic materials for implants can lead to a condition known as stress shielding due to their modulus of elasticity greatly exceeding that of bone. This reduces the load on the bone surrounding the implant, potentially slowing the healing process and, over time, causing the bone to weaken or deteriorate. PEEK's modulus of elasticity closely mirrors that of bone, ensuring that the implant does not bear all the stress and thereby preventing stress shielding. This promotes healthier bone around the implant.
Metal objects must be removed before an X-ray because they block the rays, interfering with the doctor's ability to observe. In contrast, PEEK allows X-rays to pass through. Its excellent visibility, resulting in images without artifacts, enables the use of CT scans or MRIs during surgery to assist surgeons in adjusting the position of the implant. This also simplifies monitoring the healing process post-surgery, allowing for effective observation of bone growth and recovery.
In summary, Medical grade PEEK, as an emerging implant material, showcases unique benefits in the realm of medical device implants due to its exceptional biocompatibility, bone-similar elastic modulus, and excellent visibility. As global material science continues to progress, the application of PEEK (medical grade) in medicine is expected to expand further, significantly contributing to human health.
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