Efficacy of vitamin E for mechanical damage and oxidation of polyethylene rim by stem neck impingement.
Crosslinking
Delamination
Impingement
Oxidation
Polyethylene
Vitamin E
Journal
Clinical biomechanics (Bristol, Avon)
ISSN: 1879-1271
Titre abrégé: Clin Biomech (Bristol, Avon)
Pays: England
ID NLM: 8611877
Informations de publication
Date de publication:
08 2019
08 2019
Historique:
received:
08
01
2019
revised:
25
04
2019
accepted:
15
05
2019
pubmed:
28
5
2019
medline:
2
7
2020
entrez:
26
5
2019
Statut:
ppublish
Résumé
The aim of this study is to determine the influence of crosslinking and addition of 0.3 wt% vitamin E in a polyethylene rim on its mechanical damage and oxidation caused by impingement. Six ultrahigh-molecular weight polyethylene samples were studied (control; crosslinked; vitamin-E containing; crosslinked and vitamin-E containing; aged control; and aged crosslinked and vitamin-E containing). Crosslinking was attained by irradiation with a 300 kGy electron beam; vitamin E incorporation was at 0.3 wt%; and aging was performed through forced oxidation for 14 days. Resistance to impingement was evaluated by stereoscopic observations, three-dimensional measurements, and oxidation measurements by Fourier transform infrared spectroscopy. Rim breakage (delamination and fracture) due to impingement was observed only for the aged control specimen. In contrast, crosslinked specimens containing vitamin E showed no failure of the rim after aging. The addition of vitamin E to polyethylene suppressed its oxidation and reduced the oxidation caused by crosslinking or impingement. The impingement resistance of the control sample deteriorated upon oxidation, whereas that of vitamin E-containing crosslinked polyethylene remained high due to the antioxidant property of vitamin E. Vitamin E-containing polyethylene showed a reduced risk of wear/breakage of polyethylene rims by impingement.
Sections du résumé
BACKGROUND
The aim of this study is to determine the influence of crosslinking and addition of 0.3 wt% vitamin E in a polyethylene rim on its mechanical damage and oxidation caused by impingement.
METHODS
Six ultrahigh-molecular weight polyethylene samples were studied (control; crosslinked; vitamin-E containing; crosslinked and vitamin-E containing; aged control; and aged crosslinked and vitamin-E containing). Crosslinking was attained by irradiation with a 300 kGy electron beam; vitamin E incorporation was at 0.3 wt%; and aging was performed through forced oxidation for 14 days. Resistance to impingement was evaluated by stereoscopic observations, three-dimensional measurements, and oxidation measurements by Fourier transform infrared spectroscopy.
FINDINGS
Rim breakage (delamination and fracture) due to impingement was observed only for the aged control specimen. In contrast, crosslinked specimens containing vitamin E showed no failure of the rim after aging. The addition of vitamin E to polyethylene suppressed its oxidation and reduced the oxidation caused by crosslinking or impingement. The impingement resistance of the control sample deteriorated upon oxidation, whereas that of vitamin E-containing crosslinked polyethylene remained high due to the antioxidant property of vitamin E.
INTERPRETATION
Vitamin E-containing polyethylene showed a reduced risk of wear/breakage of polyethylene rims by impingement.
Identifiants
pubmed: 31128555
pii: S0268-0033(19)30001-4
doi: 10.1016/j.clinbiomech.2019.05.024
pii:
doi:
Substances chimiques
Antioxidants
0
Cross-Linking Reagents
0
Polyethylenes
0
ultra-high molecular weight polyethylene
0
Vitamin E
1406-18-4
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
8-15Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.