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Adhesive forces and surface properties of cold gas plasma treated UHMWPE

Preedy, Emily Callard, Brousseau, Emmanuel Bruno Jean Paul ORCID:, Evans, Samuel Lewin ORCID:, Perni, Stefano and Prokopovich, Polina ORCID: 2014. Adhesive forces and surface properties of cold gas plasma treated UHMWPE. Colloids and Surfaces A: Physicochemical and Engineering Aspects 460 , pp. 83-89. 10.1016/j.colsurfa.2014.03.052

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Cold atmospheric plasma (CAP) treatment was used on ultra-high molecular weight polyethylene (UHMWPE), a common articulating counter material employed in hip and knee replacements. UHMWPE is a biocompatible polymer with low friction coefficient, yet does not have robust wear characteristics. CAP effectively cross-links the polymer chains of the UHMWPE improving wear performance (Perni et al., Acta Biomater. 8(3) (2012) 1357). In this work, interactions between CAP treated UHMWPE and spherical borosilicate sphere (representing model material for bone) were considered employing AFM technique. Adhesive forces increased, in the presence of PBS, after treatment with helium and helium/oxygen cold gas plasmas. Furthermore, a more hydrophilic surface of UHMWPE was observed after both treatments, determined through a reduction of up to a third in the contact angles of water. On the other hand, the asperity density also decreased by half, yet the asperity height had a three-fold decrease. This work shows that CAP treatment can be a very effective technique at enhancing the adhesion between bone and UHMWPE implant material as aided by the increased adhesion forces. Moreover, the hydrophilicity of the CAP treated UHMWPE can lead to proteins and cells adhesion to the surface of the implant stimulating osseointegration process.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: R Medicine > RM Therapeutics. Pharmacology
T Technology > TA Engineering (General). Civil engineering (General)
Publisher: Elsevier
ISSN: 0927-7757
Funders: ARUK
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 18 March 2014
Last Modified: 18 May 2023 09:14

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