Vitamin E Highly Cross-linked Polyethylene Reduces Mid-term Wear in Primary Total Hip Replacement: a Meta-analysis and Systematic Review of Randomized Clinical Trials Using Radiostereometric Analysis

Overview

Journal EFORT Open Rev

Specialty Orthopedics

Date 2021 Oct 20

PMID 34667647

Citations 3

Authors

Zeng Li

Shuai Xiang

Cuijiao Wu

Yingzhen Wang

Xisheng Weng

Affiliations

Soon will be listed here.

Abstract

Vitamin E incorporation into highly cross-linked polyethylene (HXLPE) has been introduced to improve wear resistance, and vitamin E incorporated HXLPE (VEPE) has been used in total hip arthroplasty.The aim of this meta-analysis was to investigate the wear properties of VEPE in clinical practice by synthesizing the data provided in randomized clinical trials.The effects on implant stability, functional outcomes and revision rate of VEPE were also compared with those of HXPLE or ultra-high molecular weight polyethylene (UHMWPE).Literature searches were conducted on 1 January 2020 using MEDLINE, EMBASE, Cochrane and ClinicalTrials.gov databases. Randomized controlled trials (RCTs) comparing the aforementioned parameters between VEPE and standard HXPLE/UHMWPE liners were included.Methodological quality and the bias of the included studies were analysed. Meta-analyses were performed using the Review Manager software.Nine RCTs met the eligibility criteria and were included. At early and mid-term follow-up, the vertical penetration and the total penetration of the femoral head were both significantly reduced in the VEPE group. The steady state wear rate of the VEPE group was also remarkably lower.However, at two-year follow-up, significantly increased cup migration was observed in the VEPE group. Moreover, the mid-term clinical outcomes of the VEPE group were worse, while the total revision rates between the two groups were not significantly different.The limited number of included studies may compromise our conclusion regarding clinical outcomes of the VEPE bearing surface. More RCTs with longer follow-up periods are needed to further investigate the effects of VEPE in total hip arthroplasty. Cite this article: 2021;6:759-770. DOI: 10.1302/2058-5241.6.200072.

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