Adhesive strength of total knee endoprostheses to bone cement - analysis of metallic and ceramic femoral components under worst-case conditions

Biomedizinische Technik. Biomedical Engineering
Philipp BergschmidtRainer Bader

Abstract

Evaluation of the adhesive strength of femoral components to the bone cement is a relevant parameter for predicting implant safety. In the present experimental study, three types of cemented femoral components (metallic, ceramic and silica/silane-layered ceramic) of the bicondylar Multigen Plus knee system, implanted on composite femora were analysed. A pull-off test with the femoral components was performed after different load and several cementing conditions (four groups and n=3 components of each metallic, ceramic and silica/silane-layered ceramic in each group). Pull-off forces were comparable for the metallic and the silica/silane-layered ceramic femoral components (mean 4769 N and 4298 N) under standard test condition, whereas uncoated ceramic femoral components showed reduced pull-off forces (mean 2322 N). Loading under worst-case conditions led to decreased adhesive strength by loosening of the interface implant and bone cement using uncoated metallic and ceramic femoral components, respectively. Silica/silane-coated ceramic components were stably fixed even under worst-case conditions. Loading under high flexion angles can induce interfacial tensile stress, which could promote early implant loosening. In conclusion, a...Continue Reading

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Citations

May 27, 2016·Biomedizinische Technik. Biomedical Engineering·Stefan Jockenhoevel
Jun 26, 2018·Advanced Healthcare Materials·Alina KirillovaKen Gall
Feb 21, 2019·Journal of Orthopaedic Surgery and Research·Shuai XiangXisheng Weng

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Methods Mentioned

BETA
pull-off
lavage
total knee

Software Mentioned

SPSS
Multigen

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