BIOMET VANGUARD XP, Руководство пользователя

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Figure 42 Figure 43
25
• With the tibial template pinned and secured in proper
position, place the tibial template keel mask
(32-700038) onto the template.
Note: If the tibial template is a size 83 to 91, the tibial keel
mask will not be needed.
• Drill the anterior peg holes using the tibial peg drill
(32-700075) (Figure 43).
Tibial Preparation
• Align the appropriate sized tibial template with
the anterior marks on the tibia and pin through
the anterior holes using 2 quick release drill pins
(32-467619) (Figure 42).
Note: The ability to externally rotate the tibial template
will be limited by the bone island. Slight external rotation
is preferable to optimize patello-femoral tracking.
eXPert Advice: Verify the tibial bone island width is
uniform by sliding the tibial template from top to bottom.
This is critical to ensure bearing clearance and proper
assembly of the bearing implant to the tibial tray implant.
It is recommended to always select a larger size tibial
tray (if appropriate) since this will allow for better bearing
coverage. For example, for a given femoral size, upsizing
the tibia by one size (i.e. from a 67 to 69 tibial tray) will
increase the bearing surface area, providing a larger
articulating surface. Tibial Tray
U-shape
XP-CR
63 65 67 69 71 73 75 79 83 87 91
XP Bearings 63 71 79 87
AS Bearings 63 67 71 75 79 83 87 91
Locking Bar 63, 65, 67 69, 71, 73, 75 79, 83, 87, 91