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The trial components are placed to determine if final adjustments are needed and occasionally to determine if a larger or smaller sized component should be used. Here, the femoral trial is placed.
The femoral trial component is shown in place
Once the femoral trial component is positioned the posterior capsule of the knee is released and osteophytes are removed
The femoral component is then removed to gain access to the tibial surface.
A sizing guide is used to determine the fit for the tibial component
The tibial guide is pinned into place
The tibial guide has an extension through which an alignment rod is placed. This is yet another built in way to continually reassess the positioning of the final implants
A cavity is created in the cancellous bone of the proximal tibia. The actual tibial implant has a stem to provide greater stability.
Then, both femoral and tibial components are placed together to assess how they function in unison
The undersurface of the patella is also resected?nbsp;
...measured with a caliper?nbsp
...sized appropriately?nbsp
...and fitted with a trial component. Any adjustments are made after taking the knee through a series of motion and stability tests
The trial components are removed for a final time
All prepared surfaces are inspected for a final time.
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