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Novel Multilayer Coatings on Polyethylene for Acetabular Devices

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Abstract:

Total hip replacement is a common practice in every day clinical work. Artificial hip implants consist of a femoral component and an acetabular component. Nowadays the acetabular component is composed of a polymeric cup and a metallic shell. This study focuses the development of an innovative acetabular component substituting the metallic shell by a multilayer coating on the acetabular cup. A titanium coating was deposited onto ultra-high molecular weight polyethylene (UHMWPE) samples by physical vapour deposition (PVD), having an in situ pretreatment with argon ion bombardment in order to optimize the adhesive strength by surface modification, followed by the deposition of a thin film of hydroxyapatite (HA) using rf magnetron sputtering technique, at room temperature. Results obtained seem to indicate that these multilayer coatings can be a viable alternative to the metallic shell, leading to the substitution of a two part for a one part acetabular component.

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Advanced Materials Forum III View Preview

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Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

868-871

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.868

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Online since:

May 2006

Authors:

Veronica Santos, João Paulo Borges, Cláudia M.S. Ranito, Eduardo Pires, Hugo F. Araújo, António Marques, Luís Tomás, Elvira Fortunato, Rodrigo Martins, Yuri Nunes

Keywords:

Acetabular Component, Adhesion, Hydroxyapatite (HAP), PVD, Sputtering, Thin Film, Titanium (Ti), UHMWPE

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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