Factors affecting aseptic loosening in primary total knee replacements: an in vitro study

Autor: David Lionberger, Laura Wattenbarger, Christopher Conlon, Timothy J. Walker
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Experimental Orthopaedics, Vol 7, Iss 1, Pp 1-6 (2020)
Druh dokumentu: article
ISSN: 2197-1153
DOI: 10.1186/s40634-020-00243-9
Popis: Abstract Background Implant surface integrity and cement bonding are assumed to be sufficient in primary total knee replacements to stabilize implants for extended wear without concerns over delamination and loosening. Yet there exists a significant rate of aseptic loosening where failure at implant cement interface occurs. The aim of this study is to look at specific aspects leading to aseptic loosening of the total knee replacement, where cement adhesion to the implant results in the lowest pull off strength. Methods Virgin ceramic coated and uncoated chrome cobalt tibial trays were used in a pull off study using differing viscosities of cement at varied time intervals to compare which combination is strongest compared to which is least resistant to pull off testing. Results Low viscosity cement had a 44% (5.9 kg verses 3.3 kg, p
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