[ Improvement of femoral bone-cement adhesion in cemented revision hip arthroplasty by application of an amphiphilic bonder in a dynamic femur expulsion testing in vitro ]. / Steigerung der femuralen Knochen-Knochenzement-Verbundfestigkeit in der zementierten Revisionshüftendoprothetik durch einen amphiphilen Knochenhaftvermittler im dynamischen in-vitro Ausstossversuch.
Biomed Tech (Berl)
; 52(6): 391-7, 2007 Dec.
Article
em De
| MEDLINE
| ID: mdl-18047404
ABSTRACT
Cemented femoral stems have shown decreased longevity compared to cementless implants in hip revision arthroplasty. The aim of this study was to evaluate the effect of an amphiphilic bonder on bone cement stability in a biomechanical femur expulsion test. A simplified hip simulator test setup with idealised femur stem specimens was carried out. The stems were implanted into bovine femurs (group 1 no bonder, n=10; group 2 bonder including glutaraldehyde, n=10; group 3 bonder without glutaraldehyde, n=10). A dynamic loading (maximum load 800 N; minimum load 100 N; frequency 3 Hz; 105 cycles) was performed. Subsequently, the stem specimens were expulsed axially out of their implant beds and maximum load at failure was recorded. The static controls showed a mean maximum load to failure of 4123 N in group 1, 8357.5 N in group 2 and 5830.8 N in group 3. After dynamic loading, the specimens of group 2 reached the highest load to failure (8191.5 N), followed by group 3 (5649.5 N) and group 1 (3462 N), respectively. In group 2, we observed nine periprosthetic fractures at a load of 8400 N without signs of interface loosening. Application of an amphiphilic bonder led to a significant improvement of bonding stability, especially when glutaraldehyde was added to the bonder. This technique might offer an increased longevity of cemented femur revision stems in total hip replacement.
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Bases de dados:
MEDLINE
Assunto principal:
Tensoativos
/
Vitálio
/
Falha de Prótese
/
Gentamicinas
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Suporte de Carga
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Artroplastia de Quadril
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Prótese de Quadril
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Metilmetacrilatos
Limite:
Animals
Idioma:
De
Revista:
Biomed Tech (Berl)
Ano de publicação:
2007
Tipo de documento:
Article