The sizing block is pinned to assure proper size and positioning.

The sizing block is removed. The pins are left in place and are used to position the cutting block.

The anterior aspect of the femur is then resected?

...followed by the posterior aspect?

...and finally the champfer cuts (angled cuts connecting anterior and posterior surfaces with the distal surface).

Soft tissue and excess bone are removed.

The diagram demonstrates the planes of the anterior, posterior and champfer cuts.

The notch of the distal femur is prepared using a series of guides as well.

The anterior part of the notch is completed with a V-shaped cut.

The bottom notch cut is shown.

Once all the cuts are completed the surfaces are prepared for placement of trial components.

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?

...measured with a caliper?