Reference : Static and dynamic differences in fixation stability between a spacer plate and a sma...
Scientific journals : Article
Engineering, computing & technology : Mechanical engineering
Human health sciences : Orthopedics, rehabilitation & sports medicine
http://hdl.handle.net/10993/9488
Static and dynamic differences in fixation stability between a spacer plate and a small stature plate fixator used for high tibial osteotomies – A biomechanical bone composite study
English
Maas, Stefan mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Diffo Kaze, Arnaud mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Dueck, Klaus mailto [Centre Hospitalier de Luxembourg > Department of Orthopedic Surgery]
Pape, Dietrich mailto [Centre Hospitalier de Luxembourg > Department of Orthopedic Surgery]
2013
ISRN Orthopedics
Hindawi
2013
Yes
International
20906161
2090617X
New York, NY 10022
USA
[en] High tibial osteotomy (HTO) ; Cyclic and static loading ; TomoFix ; Contour Lock ; Stiffness ; Loss of correction
[en] Background: The objective of the present study was to comparemechanical strength and stability of the newly designed spacer plate with the gold standard plate for the treatment of medial knee joint osteoarthritis. Materials and Methods: Ten fourth-generation tibial bone composites underwent a medial open-wedge high tibial osteotomy (HTO) according to standard techniques, using five TomoFix plates and five Contour Lock plates. Static compression load to failure and load-controlled cyclical fatigue failure tests were performed. Forces and horizontal displacements were measured; plastic deformations and dynamic stiffness were determined. Results and Discussion: In all samples, rotation of the tibial head and fracture of the opposite cortex were observed. Behaviors of the specimens under static loading were comparable between groups. Cyclic testing revealed lateral significant higher stiffness untilfailure for the Contour Lock compared to the TomoFix plate. No visible implant failure was observed in any group. Conclusion: Considering the static analysis, both plates offered sufficient stability under physiologic loads of up to 3000N. The Contour Lock plate-fixated specimens showed a higher stability during the cyclic testing, supposedly due to the wider distance between the fixation
screws.
http://hdl.handle.net/10993/9488

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