Biomechanical comparison of plate-nail vs. plate-rod for experimentally-induced gap fractures in ex vivo canine femora

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Mesquita, L. R. [UNESP]
Muzzi, L. A.L.
Lima, J. T.
Muzzi, R. A.L.
Lacreta, A. C.C.
Silva, W. G.

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The purpose this original article is to compare the mechanical properties of an interlocking nail-plate combination (plate-nail) vs. an intramedullary pin-plate combination (plate-rod) applied to experimentally induced gap fractures in canine femora. Twenty four paired canine femora were assigned to either plate-nail or plate-rod with 2.7 mm or 3.5 mm system constructs. In each femur, a mid-diaphyseal ostectomy was performed and the selected system was applied. Paired system constructs were subjected to compression and bending tests. The maximum load differed significantly between fixation systems. The plate-nail system had greater maximum load than plate-rod system. The strength, stiffness and maximum deformation was similar between plate-rod and plate-nail. The plate-nail system proved to be a good option for diaphyseal long bone fracture fixation in dogs.



Bone plate, Femur, Interlocking nail, Intramedullary pin, Loading profile

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Asian Journal of Animal Sciences, v. 9, n. 6, p. 361-369, 2015.