Oxidation and other property changes of a remelted highly crosslinked UHMWPE in retrieved tibial bearings.
J Biomed Mater Res B Appl Biomater
; 105(1): 39-45, 2017 01.
Article
em En
| MEDLINE
| ID: mdl-26404508
ABSTRACT
This study examined retrieved UHMWPE tibial bearings made from a remelted highly crosslinked (HXL) UHMWPE to determine whether the material is chemically stable in vivo. Retrieved tibial components were measured for changes in ketone oxidation and crosslink density. Oxidation increased with in vivo duration, and a significant decrease in crosslink density with increased mean ketone oxidation index was observed. These results suggest that in vivo oxidation is causing material degradation. Furthermore, a subsurface whitened damage region was found below the articular surface of one bearing, indicating the possibility of a clinically relevant decrease in mechanical properties of this component. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B Appl Biomater, 105B 39-45, 2017.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Polietilenos
/
Tíbia
Limite:
Animals
Idioma:
En
Revista:
J Biomed Mater Res B Appl Biomater
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2017
Tipo de documento:
Article