Effects of fixation technique on displacement incompatibilities at the bone-implant interface in cementless total knee replacement in a canine model

Journal of Applied Biomaterials : an Official Journal of the Society for Biomaterials
A BerzinsR N Natarajan

Abstract

Bone-implant displacements can be caused by rigid body motion and by differences in material properties of the implant and bone. In the present study of the tibial component in total knee replacement, we tested a series of tibial component fixation designs to determine how certain design features influenced the magnitude of the tangential displacement between the component and supporting bone in a canine model. The transverse expansion of the proximal tibia under static axial loading was measured in the intact tibia and then in the same bone following implantation of tibial components with different interface characteristics: cementless flat smooth, cementless flat porous-coated, cementless flat porous-coated with screws, cementless pegged porous-coated, cementless pegged porous-coated with screws, cemented pegged, and cemented pegged with screws. In all cases, the magnitude of the transverse expansion increased with higher applied loads. When the statistical analysis was restricted to the cementless interfaces, the presence/absence of the porous coating, the presence/absence of pegs, and the use of screws had no significant influence on tibial expansion. However, in an analysis including the cemented and cementless pegged comp...Continue Reading

References

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Citations

Nov 20, 2012·Journal of Avian Medicine and Surgery·E Marie RushAndrew LaVasser
Oct 27, 2011·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·K A MannM J Allen
Jul 4, 2009·Veterinary Surgery : VS·Matthew J AllenKenneth A Mann
Sep 5, 2012·The Journal of Small Animal Practice·M J Allen
Dec 6, 2008·The Journal of Arthroplasty·Ian P HollowayBernie A Zicat
Jun 6, 2007·Veterinary Surgery : VS·William D LiskaAnna K Hielm-Björkman
Apr 18, 2001·Journal of Shoulder and Elbow Surgery·M A WirthC A Rockwood

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