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Polyether ether ketone (PEEK) is a colourless organic thermoplastic polymer in the polyaryletherketone (PAEK) family, used in engineering applications. It was invented in November 1978 [2] and brought to market in the early 1980s by part of Imperial Chemical Industries (ICI), the PEEK division was acquired through a management buyout, giving rise to Victrex PLC.
PEEK is a semicrystalline polymer composed of benzene, ketone, and ether groups. PEEK is known for having good physical properties including high wear resistance and low moisture absorption [3] and has been used for biomedical implants due to its relative inertness inside of the human body.
Polyetherketones (PEK for short) are polymers whose molecular backbone contain alternating ketone (R-CO-R) and Ether (R-O-R) functionalities. The most common are Polyaryletherketones (PAEK), in which there is an aryl group linked in the (1–4)-position between each of the functional groups.
In the automotive industry it is used to make gears and thrust bearings in transmissions. [4] Due to its excellent resistance to hydrolysis it is used in medical devices because it does not break down when sterilized. PEKEKK is used to make surgical implants, such as artificial hips. [5]
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Implants can be used as well, but are not preferred in patients who are to be irradiated or recently have had an infection or necrosis, because of the increased risk of infection and extrusion. [8] These implants can be factory-made out of metal , synthetic materials (PMMA, PEEK) or synthetic body-own material (Hydroxylapatite). In the pictures ...