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Rev Esp Cir Ortop Traumatol. 2014 Nov-Dec;58(6):329-35. doi: 10.1016/j.recot.2014.03.002. Epub 2014 Jul 16.

[The geometry of the keel determines the behaviour of the tibial tray against torsional forces in total knee replacement].

[Article in Spanish]

Author information

Departamento de I+D+i, SURGIVAL, Paterna, Valencia, España.
Departamento de I+D+i, SURGIVAL, Paterna, Valencia, España. Electronic address:
Unidad de Rodilla, Hospital Clínic de Barcelona, Universitat de Barcelona, Barcelona, España.
Unidad de Rodilla, Parc de Salut Mar, Barcelona, Universitat Autònoma de Barcelona (UAB), IMIM.
Servicio COT, Parc de Salut Mar, Barcelona, Universitat Autònoma de Barcelona (UAB).
Servicio de COT, Hospital Universitario Germans Trias i Pujol, Badalona, Barcelona, España.


The keel design of the tibial tray is essential for the transmission of the majority of the forces to the peripheral bone structures, which have better mechanical proprieties, thus reducing the risk of loosening. The aim of the present study was to compare the behaviour of different tibial tray designs submitted to torsional forces. Four different tibial components were modelled. The 3-D reconstruction was made using the Mimics software. The solid elements were generated by SolidWorks. The finite elements study was done by Unigraphics. A torsional force of 6 Nm. applied to the lateral aspects of each tibial tray was simulated. The GENUTECH® tibial tray, with peripheral trabecular bone support, showed a lower displacement and less transmitted tensions under torsional forces. The results suggest that a tibial tray with more peripheral support behaves mechanically better than the other studied designs.


Diseño bandeja tibial; Keel; Par de torsión; Prótesis total de rodilla; Quilla; Tibial tray design; Torsional force; Total knee replacement

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