Comparison of tribological properties of PEEK for the design of a friction pair of all-polymer implants

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00350203" target="_blank" >RIV/68407700:21220/21:00350203 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of tribological properties of PEEK for the design of a friction pair of all-polymer implants

Popis výsledku v původním jazyce

With the development of new polymeric materials, such as PEEK (polyetheretherketone) and its modifications, the possibility to create movable connection of small joint implants from polymer-polymer combinations has opened up. In comparison with metal-polymer or ceramics-polymer friction joints which have been long used, the main advantages of such a connection include a reduced generation of potentially toxic abrasion particles and surprisingly, very good friction and abrasion properties. To select a suitable combination of materials, long-term tribological experiments were designed. PEEK-UHMWPE (ultra-high molecular weight polyethylene) combinations were tested using pin-on-disc method in PBS (phosphate buffered saline) and compared to the commonly used CoCrMo-UHMWPE combination and its improved, DLC (diamond-like carbon) coating including, variant CoCrMo/DLC-UHMWPE. The results showed the PEEK-UHMWPE pair having similar low friction coefficient as Al2O3-UHMWPE but lower wear. The functionality of the PEEK-UHMWPE friction pair was verified on a motion simulator. The tests were performed on a model of the first metatarsophalangeal (MTP) total joint replacement (figure 1), where the metatarsal head was made of PEEK and the phalangeal cup was made of UHMWPE. It was confirmed that the proposed combination can be suitable for the production of small joint implants.

Název v anglickém jazyce

Comparison of tribological properties of PEEK for the design of a friction pair of all-polymer implants

Popis výsledku anglicky

With the development of new polymeric materials, such as PEEK (polyetheretherketone) and its modifications, the possibility to create movable connection of small joint implants from polymer-polymer combinations has opened up. In comparison with metal-polymer or ceramics-polymer friction joints which have been long used, the main advantages of such a connection include a reduced generation of potentially toxic abrasion particles and surprisingly, very good friction and abrasion properties. To select a suitable combination of materials, long-term tribological experiments were designed. PEEK-UHMWPE (ultra-high molecular weight polyethylene) combinations were tested using pin-on-disc method in PBS (phosphate buffered saline) and compared to the commonly used CoCrMo-UHMWPE combination and its improved, DLC (diamond-like carbon) coating including, variant CoCrMo/DLC-UHMWPE. The results showed the PEEK-UHMWPE pair having similar low friction coefficient as Al2O3-UHMWPE but lower wear. The functionality of the PEEK-UHMWPE friction pair was verified on a motion simulator. The tests were performed on a model of the first metatarsophalangeal (MTP) total joint replacement (figure 1), where the metatarsal head was made of PEEK and the phalangeal cup was made of UHMWPE. It was confirmed that the proposed combination can be suitable for the production of small joint implants.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TN01000071" target="_blank" >TN01000071: Národní centrum kompetence Mechatroniky a chytrých technologií pro strojírenství</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů