...polyethylene liner compared to standard liners in total...

来自 : www.onacademic.com/detail/jour 发布时间：2021-03-24

Vitamin-E diffused highly cross-linked polyethylene liner compared to standard liners in total hip arthroplasty. A randomized, controlled trial Author: Salemyr, Mats Muren, Olle Ahl, Torbj?rn Bodén, Henrik Chammout, Ghazi Stark, André Sk?ldenberg, Olof

Journal: International Orthopaedics

Issue Date: 2015

Abstract(summary):
We hypothesized that a vitamin E-treated polyethylene articulating liner had lower femoral head penetration than a conventional liner.Fifty-one patients with primary hip osteoarthritis were randomized to an uncemented cup with either vitamin E-treated highly cross-linked polyethylene (HXLPE) (vitamin-e group, n = 25) or a standard HXLPE liner (control group, n = 26) and followed for two years after surgery. The outcome variable was polyethylene (PE) linear head penetration, measured with radiostereometry (RSA).The head penetration in x- (medial/lateral) and y- (vertical) axes was significantly lower for the vitamin E-treated liner up to twoyears with a mean difference between the groups of 0.10mm (95% CI 0.04–0.18) and 0.08mm (95% CI 0.01–0.15), respectively. The initial total penetration was lower for the vitamin-E group but did not reach statistical significance at twoyears with a mean difference between the groups of 0.07mm (95% CI −0.001 to 0.15, p = 0.09). We found no differences in clinical outcome between the groups.In this prospective, randomized, controlled trial on a new vitamin-E diffused HXLPE linerwe found, compared to a conventional HXLPE liner, lower initial head penetration and lower superior and medial wear. A longer follow-up than twoyears is necessary to demonstrate lower overall head penetration in vitamin-E liners compared to contemporary highly cross-linked PE.

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