| Literature DB >> 25754257 |
Nanna H Sillesen1, Meridith E Greene2, Audrey K Nebergall2, Poul T Nielsen3, Mogens B Laursen3, Anders Troelsen4, Henrik Malchau2.
Abstract
Vitamin E diffusion into highly cross-linked polyethylene (E-XLPE) is a method for enhancing oxidative stability of acetabular liners. The purpose of this study was to evaluate in vivo penetration of E-XLPE using radiostereometric analysis (RSA). Eighty-four hips were recruited into a prospective 10-year RSA. This is the first evaluation of the multicenter cohort after 3-years. All patients received E-XLPE liners (E1, Biomet) and porous-titanium coated cups (Regenerex, Biomet). There was no difference (P=0.450) in median femoral head penetration into the E-XLPE liners at 3-years comparing cobalt-chrome heads (-0.028mm; inter-quartile range (IQR) - 0.065 to 0.047) with ceramic heads (-0.043mm, IQR - 0.143to0.042). The 3-year follow-up indicates minimal E-XLPE liner penetration regardless of head material and minimal early cup movement.Entities:
Keywords: RSA; hip arthroplasty; liner; polyethylene; vitamin E
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Year: 2015 PMID： 25754257 DOI： 10.1016/j.arth.2015.02.018
Source DB: PubMed Journal: J Arthroplasty ISSN： 0883-5403 Impact factor: 4.757