Medacta GMK Sphere - Positioning the Distal Cutting Guide; Verification Check

7
3.2 POSITIONING THE DISTAL CUTTING GUIDE
Slide the fixed slotted distal cut positioner onto the distal
cut reference guide.
Connect the distal cutting block to the fixed slotted distal
cut positioner then secure the connection by pushing the
lever down.
CAUTION
The slotted distal cutting guide is NOT compatible with the
Micrometric Distal Cut Positioner unslotted version
(ref.02.07.10.0185).
7.
The femoral distal resection is set at 9 mm, corresponding
to the thickness of the distal condyles of the femoral
component.
OPTION
Alternatively, a micrometric distal cut positioner is available.
The distal resection level can be adjusted by turning the
screw on the distal cut positioner. Make sure to set a 9 mm
distal resection.
Stabilize the distal cutting block by inserting two pins in the
parallel positioning holes (marked in red in the figure below)
and one pin in the oblique hole (marked in blue in the figure
below) and then remove everything except the distal cutting
block by releasing the lever.
Reference Line
Standard distal slotted cutting block
8.
Distal cutting block holes (right knee)

Parallel positioning holes

Oblique fixation holes

Alignment rod holes

Parallel repositioning holes

Additional fixation holes
9.
Check the distal femoral resection level using the angel
wing. Perform the distal cut with a 1.27 mm thickness saw
blade through the slot built into the guide. Once the
resection is performed, remove the pins.
VERIFICATION CHECK
Using the dedicated caliper, check the thickness of the
resected medial and lateral distal femoral bone and
cartilage (if present) resection. Measurement on the
unworn condyles should read 8.0 ± 0.5 mm. Worn condyles
should measure 6.0 ± 0.5 mm. These values equal the 9
mm thickness of the distal condyles of the GMK Sphere
femoral component after compensating for the ~1 mm
kerf of the saw blade and 2 mm of worn cartilage when
present.