VESTAKEEP® i4 G is a natural colored, high viscosity polyether ether ketone (PEEK) that is especially designed for long term implantable medical devices. This grade is often used for extrusion processing technologies.Proven Biocompatibility of VESTAKEEP® i-Grades
The extra high purity and extended quality measures make VESTAKEEP® i-Grade materials an excellent choice for permanent implants.
For VESTAKEEP® i4 G, biocompatibility has been tested following ISO 10993-1 recommendations for permanent tissue/bone contact and USP Class VI.
VESTAKEEP® i4 G complies ASTM F2026 “Standard Specification for Polyetheretherketone (PEEK) Polymers for Surgical Implant Applications”.
A summary of biocompatibility test results is available upon request.
Biocompatibility tests available for i4 G
Processing of VESTAKEEP® i-Grades
VESTAKEEP® i4 G can be processed by common melt processing techniques like injection molding and extrusion.
We recommend a melt temperature between 370°C and 380°C during the injection molding process. The mold temperature should be within a range of 160°C to 200°C, preferably 180°C.
Our technical experts would appreciate to give you support regarding the special requirements for the processing of VESTAKEEP® i4 G.
Typical Applications
- spinal cages
- interference screws
- facial implants for facial bone fractures
- stents
- suture anchors
- access ports
- heart valves
- small joints
Benefits at a glance
- Biocompatibility
- Biostability
- Sterilization compatible
- Modulus similar to bone
- Wear comfort due to light weight and low thermal conductivity
- Lower stress-shielding effect
- No x-ray artifacts and/or adjustable opacity
- Metal-free
- Low water absorption
- Resistant to chemicals Injection molding and extrusion compatible
- Good processability and machinability