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PEEK in Medical Devices: Biocompatibility, FDA & ISO 10993 Compliance

Why PEEK is Ideal for Medical Devices

Biocompatibility

PEEK passes the full suite of ISO 10993 biocompatibility tests:

Test Category	Standard	PEEK Result
Cytotoxicity	ISO 10993-5	Non-cytotoxic
Sensitisation	ISO 10993-10	Non-sensitising
Irritation	ISO 10993-10	Non-irritating
Systemic toxicity (acute)	ISO 10993-11	Non-toxic
Material-mediated pyrogenicity	ISO 10993-11	Non-pyrogenic
Genotoxicity (Ames)	ISO 10993-3	Non-mutagenic
Implantation (short & long-term)	ISO 10993-6	Non-reactive
USP Class VI	USP <88>	Passed

Mechanical Properties Match Cortical Bone

PEEK‘s elastic modulus (3.6 GPa) is closer to cortical bone (15–20 GPA when filled) than titanium (110 GPa), reducing stress shielding — a phenomenon where stiff metal implants cause bone resorption due to reduced mechanical loading.

Radiolucency

PEEK is radiolucent — it appears transparent on X-ray, CT, and MRI scans. This eliminates imaging artifacts common with metal implants and allows post-operative monitoring of bone healing without obstruction.

Sterilisation Compatibility

PEEK withstands all major sterilisation methods:

· Autoclave: 134°C, 18 minutes, 1000+ cycles without degradation

· Gamma radiation: Up to 25 kGy without significant property loss

· Ethylene oxide (EtO): Compatible, requires standard aeration

· Dry heat: 160°C compatible

Major Medical Applications

Implantable Devices

· Spinal fusion cages — interbody fusion devices (lumbar and cervical)

· Dental implants — custom abutments and healing caps

· Cranial implants — custom cranial plates via 3D printing

· Orthopaedic trauma plates — fracture fixation devices

Surgical Instruments

· Laparoscopic instrument handles — lightweight, autoclavable

· Retractor blades — radiolucent, non-conductive

· Trial spacers — disposable sizing instruments

· Suction tube tips — chemical resistant, autoclavable

Diagnostic Equipment

· CT scanner components — radiolucent table components

· Ultrasound probe housings — electrically insulating

· Blood analysis manifolds — chemically inert

Regulatory Pathway for PEEK Medical Devices

FDA (United States)

· PEEK polymer: cleared under multiple 510(k) predicates

· Implant-grade PEEK: typically requires 510(k) or PMA depending on application

· Material master file (MAF) available from resin manufacturers

CE Mark (European Union)

· PEEK implants: Class IIb or III under MDR

· Requires Notified Body conformity assessment

· Biocompatibility testing per ISO 10993 series

NMPA (China)

· PEEK implants: Class III medical device

· Requires clinical evaluation and domestic manufacturing or import registration

For more on PEEK properties, see our PEEK Plastic Sheet Guide. For PEEK rod specifications for medical machining, read our Natural PEEK Rod NGM-S12B guide.

FAQ

Q1: Is PEEK FDA approved for medical implants?

PEEK material itself is not “FDA approved” — rather, medical devices made from PEEK receive FDA clearance through the 510(k) or PMA process. Many PEEK implant devices (spinal cages, dental abutments) have received FDA 510(k) clearance. The PEEK material is supported by Master Files on file with the FDA.

Q2: How does PEEK compare to titanium for implants?

PEEK has a lower elastic modulus closer to bone (reducing stress shielding), is radiolucent (no imaging artifacts), is lighter (1.32 vs 4.5 g/cm³), and is non-metallic (no metal allergy risk). Titanium has higher strength and is more established for load-bearing applications. The choice depends on the specific application requirements.

Q3: Can PEEK medical devices be sterilised with autoclave?

Yes, PEEK can be autoclaved at 134°C for over 1000 cycles without significant property degradation. This makes it ideal for reusable surgical instruments. PEEK is also compatible with gamma radiation, EtO, and dry heat sterilisation methods.

Q4: What is the cost of medical-grade PEEK compared to standard PEEK?

Medical-grade PEEK typically costs 50–100% more than industrial-grade PEEK due to additional testing, documentation, cleanroom packaging, and regulatory compliance requirements. Prices range from $150–200/kg for medical grade versus $85–110/kg for industrial grade.

Need medical-grade PEEK for your device? Contact NAGOMER for biocompatible PEEK products, or explore our PEEK sheets and PEEK rods.

NAGOMER — Professional Engineering Plastics Solutions

www.nagomer.com | info@nagomer.com