| Product Definition |
A spinal interbody implant made primarily from polyether ether ketone (PEEK) and designed for cervical interbody fusion. |
It maintains disc-space height and supports fusion between adjacent cervical vertebral bodies after disc removal. |
| Primary Medical Application |
Anterior cervical discectomy and fusion (ACDF), subject to the surgeon’s indication and applicable regulatory approval. |
Common treatment goals include neural decompression, restoration of disc height, and stabilization of the operated segment. |
| Base Polymer |
Medical-grade PEEK, a high-performance thermoplastic used in implantable medical devices. |
PEEK offers chemical resistance, sterilization compatibility, and mechanical behavior closer to cortical bone than many metallic alloys. |
| Radiographic Property |
PEEK is radiolucent; radiopaque markers are typically incorporated to identify implant position. |
Reduced imaging artifact can help clinicians evaluate implant placement and postoperative bone formation using X-ray, CT, or MRI. |
| Elastic Modulus |
Unfilled PEEK has an elastic modulus of approximately 3.5–4.0 GPa; exact values depend on grade, processing, and test method. |
Its relatively low stiffness may reduce the risk of stress shielding compared with much stiffer metal implants, although clinical performance depends on the complete construct. |
| Thermal Characteristics |
PEEK has a glass-transition temperature of approximately 143°C and a melting temperature of approximately 343°C. |
Validated molding, machining, cleaning, packaging, and sterilization processes are required for medical-device production. |
| Endplate Contact Surface |
The superior and inferior surfaces may include teeth, ridges, serrations, or other anti-migration features. |
Surface geometry is intended to improve initial stability and resist implant migration while limiting excessive endplate damage. |
| Central Graft Window |
Many cage designs include an internal opening for autograft, allograft, or an approved bone-graft substitute. |
The window allows graft material to contact prepared vertebral endplates and supports the biological fusion process. |
| Implant Profile |
Available profiles vary by surgical approach, cervical level, lordotic angle, footprint, and height. |
A suitable profile should restore alignment and disc height without excessive distraction or overloading of the vertebral endplates. |
| Lordotic Design |
Cages may be parallel or manufactured with a fixed lordotic angle; the available angle is product-specific. |
Angulation can assist restoration of segmental cervical alignment when selected according to patient anatomy and surgical planning. |
| Fixation Options |
Cages may be used with an anterior plate and screws or may incorporate an integrated fixation mechanism, depending on the approved design. |
Fixation strategy affects construct stability, surgical technique, implant profile, and postoperative management. |
| Radiopaque Markers |
Markers are commonly made from radiopaque materials such as tantalum or titanium, according to the validated product design. |
Markers provide reference points for implant depth, orientation, and postoperative radiographic assessment. |
| Surface Modification |
Some cages use porous, textured, coated, or additive-manufactured surfaces to improve bone–implant interaction. |
Surface architecture can influence osseointegration, but performance must be supported by mechanical, biological, and clinical evidence. |
| MRI Considerations |
PEEK itself is nonmetallic and generally produces limited MRI artifact; any marker or fixation components must be assessed separately. |
MRI safety and conditional-use information must come from the device’s validated labeling and testing. |
| Mechanical Testing |
Typical evaluation includes static compression, subsidence, expulsion or migration, fatigue, and torsional performance. |
Testing helps demonstrate that the cage can tolerate expected loads during the intended period of spinal fusion. |
| Biological Safety |
The finished device should be evaluated for biocompatibility according to the applicable medical-device risk assessment and standards. |
Assessment may address cytotoxicity, sensitization, irritation, systemic toxicity, genotoxicity, and material-mediated risks where applicable. |
| Sterilization |
The sterilization method depends on the complete device, packaging system, and validated instructions for use; common medical-device methods include ethylene oxide and radiation. |
Sterility assurance requires validated processing, packaging integrity, and compliance with the target market’s regulatory requirements. |
| Potential Advantages |
Radiolucency, relatively bone-like stiffness, design flexibility, and compatibility with graft windows are commonly cited advantages. |
The actual benefit depends on implant geometry, surgical technique, patient factors, fixation, and the quality of supporting evidence. |
| Key Risks and Limitations |
Possible risks include subsidence, migration, nonunion, adjacent-segment symptoms, infection, dysphagia, and neurological or vascular complications. |
Device selection cannot eliminate surgical risk; indications, contraindications, and warnings must be reviewed by qualified clinicians. |
| Supplier Evaluation Criteria |
Review material traceability, design verification, process validation, quality-system certification, sterilization validation, packaging validation, and regulatory documentation. |
A reliable global sourcing decision should be based on documented compliance and product-specific evidence rather than price or marketing claims alone. |
| Relevant Quality Frameworks |
Commonly referenced frameworks include ISO 13485 for medical-device quality management and ISO 10993 for biological evaluation, together with applicable national regulations. |
The exact requirements vary according to the intended market, device classification, claims, and regulatory pathway. |