Replacing Metal Implants: A Material Revolution in Orthopedic Surgery

Release Date：2026-01-07 09:00 Applications

Traditional metallic orthopedic implants typically bear applied loads unilaterally, leading to stress shielding—bone atrophy resulting from insufficient mechanical stimulation. These limitations, compounded by challenges such as wear debris-induced osteolysis and imaging artifacts, have catalyzed the transition toward advanced polymeric biomaterials.

PEEK: A Promising Alternative

Polyetheretherketone (PEEK) has emerged as a leading candidate for next-generation implant applications. This high-performance thermoplastic exhibits a melting point of approximately 340°C, a continuous service temperature of 260°C, and—most critically—an elastic modulus closely matching that of human cortical bone. This mechanical similarity enables physiological load-sharing between the implant and surrounding bone, thereby mitigating stress shielding. Furthermore, PEEK is radiolucent, eliminating imaging artifacts in radiography and computed tomography; corrosion-resistant; and entirely free of metallic ion elution. These properties render PEEK particularly suitable for spinal arthrodesis and joint arthroplasty applications.

PEEK-LISCIEX？

Medical-Grade PEEK-LISCIEX

PEEK-LISCIEX (Life Science X), a medical-grade formulation developed by Jilin ZYPEEK Technology Co., Ltd., represents a significant domestic innovation within China's biomedical materials sector. This Class III passive implant material is indicated for long-term tissue and bone contact (exceeding 30 days) and has facilitated Class III medical device registration with the National Medical Products Administration (NMPA) for multiple strategic partners.

Stress Shielding Mitigation

Wolff's law posits that bone tissue forms in response to mechanical stress and resorbs in its absence. The bone-like elastic modulus of PEEK preserves physiological loading conditions, maintaining bone density and promoting osseointegration and healing.

Imaging Compatibility

Unlike metallic implants, PEEK produces minimal artifacts in X-ray and CT imaging, facilitating accurate intraoperative placement and enabling precise postoperative assessment of healing progression.

Sterilization Stability

PEEK-LISCIEX retains its mechanical properties, molecular integrity, and biocompatibility following multiple sterilization cycles, including steam, gamma radiation, and ethylene oxide protocols.

Biocompatibility

The material demonstrates non-cytotoxicity, non-sensitization, and minimal inflammatory response or adverse tissue reaction in accordance with ISO 10993 standards.

Design Flexibility

As a high-performance thermoplastic, PEEK accommodates injection molding, extrusion, compression molding, and additive manufacturing processes. Integration with three-dimensional imaging and reconstruction technologies enables patient-specific implant fabrication, including cranial plates and other custom devices. Surface modifications and composite formulations can be tailored to achieve specific mechanical and bioactive properties.

PEEK-LISCIEX Applications

Spinal Surgery

Interbody fusion cages, Pedicle screw systems; Indications: disc herniation, spinal instability, degenerative conditions

Traumatology

Bone plates and screws, Intramedullary nails; Applications: limb fractures, pelvic trauma

Joint Arthroplasty

Knee, hip, and shoulder replacements; Small joint arthroplasty (e.g., digital joints)

Sports Medicine

Interference screws, Suture anchor systems; Applications: ligament reconstruction, meniscal repair

Neurosurgery and Craniofacial Surgery

Cranial fixation plates, Maxillofacial reconstruction plates

Dental and Maxillofacial Applications

Dental implant abutments, Prosthetic frameworks

ZYPEEK's Advantages

Manufacturing and Regulatory Support

ZYPEEK manufactures PEEK-LISCIEX within a 1,141 m² Grade 10,000 (ISO Class 7) GMP-compliant cleanroom environment, ensuring batch-to-batch consistency and quality assurance. The company has established comprehensive NMPA Master File documentation and provides full traceability throughout the product lifecycle, offering regulatory submission support and customized technical services to strategic partners.

Products and grades

ZR3G/ZR7G Injection molding (e.g., sternal fixation bands); extrusion (additive manufacturing filaments, profiles)
ZR7 Rods Machined into interbody fusion cages and other spinal implants;
ZR7 Sheets Custom cranial implants and patient-specific devices.