Biomechanical comparison of the strength of adhesion of polymethylmethacrylate cement to zirconia ceramic and cobalt-chromium alloy components in a total knee arthroplasty.
J Orthop Sci
; 19(6): 940-7, 2014 Nov.
Article
em En
| MEDLINE
| ID: mdl-25270016
ABSTRACT
PURPOSE:
The purpose of this study was to clarify the biomechanical characteristics of cement-material interfaces for the zirconia ceramic and cobalt-chromium (Co-Cr) alloy femoral components used for total knee arthroplasty.METHODS:
In the first sub-study, we compared the strength of adhesion of the cement to flat plates, by tensile testing under dry and moistened conditions. In the second sub-study, we compared the maximum load of the cement-component complex by tensile testing. In the third sub-study, we compared the fatigue characteristics of the cement-component complex by use of a dynamic tensile testing machine.RESULTS:
Under dry conditions, the maximum strength of adhesion to the zirconia ceramic plate was the same as that to the Co-Cr alloy plate. Under moistened conditions, however, the strength of adhesion to the zirconia ceramic plate was significantly lower (p = 0.0017) whereas the strength of adhesion to the Co-Cr alloy plate was not reduced. Maximum load for the cement-component complexes for zirconia ceramic and Co-Cr alloy was no different under both dry and moistened conditions. Fatigue testing showed that cement-zirconia adhesion was stronger than cement-Co-Cr alloy adhesion (p = 0.0161).CONCLUSIONS:
The strength of adhesion of cement to zirconia ceramic is substantially weaker under wet conditions than under dry conditions. The mechanical properties of cement-zirconia ceramic component complexes and cement-Co-Cr alloy component complexes are equivalent.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Resistência à Tração
/
Zircônio
/
Cimentos Ósseos
/
Cerâmica
/
Ligas de Cromo
/
Polimetil Metacrilato
/
Artroplastia do Joelho
Limite:
Humans
Idioma:
En
Revista:
J Orthop Sci
Assunto da revista:
ORTOPEDIA
Ano de publicação:
2014
Tipo de documento:
Article