Stryker’s Triathlon TS revision knee system features a reamer-based system of tibial and femoral Triathlon Tritanium cone augments, which are designed to provide stability in revision cases where a metaphyseal defect filling is necessary. The reamer-based nature of the system enables reproducible procedural simplicity that helps to maximise bone preservation and allows for metaphyseal fixation without constraining subsequent implant positioning1.
Tritanium is a highly porous metal biologic fixation technology derived from a commercially-pure titanium powder. Stryker’s 3D printing process utilises a focused laser beam to melt layers of titanium powder, giving Stryker the ability to create unique porous structures, and make it possible to selectively position these porous structures in desired zones.
The Triathlon Tritanium cone augments are manufactured using this technology
The combination of solid and porous structures allows for reduced cone augment cross sections while still meeting fatigue strength requirements2. Reduced cross sections permit the use of larger diameter stems and provide ‘implant-to-cone’ alignment freedom.
Normalisations on the solid, inner surface of the cone augments create a cement interface which reduces cement shear. The inner surface is also rough, to accommodate cement adhesion3,4
Torsional testing showed no disassociation of the cone to the tibial baseplate under clinically relevant loading3