BIOMET VANGUARD XP, Руководство пользователя

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Figure 20
Figure 19 Figure 21
15
Tibial Preparation
Tibial Resection with Intact/
Functional ACL
• Select the appropriate tibial island template
(from 32-700421 to 32-700425) by placing the guide on
the native tibia to size and set a preliminary rotation for
the tibial component (Figure 19).
• Use an alignment rod to ensure alignment with the
medial third of the tibial tubercle.
• When the appropriate size template is determined and
positioned, outline the island with a marking pen.
Resection
• Attach the tibial universal cutting block (32-700431)
(which has a 7 degrees posterior slope built-in) to the
EM tibial guide (32-700365).
• Position the EM tibial guide on the tibia and place the
spring-loaded arms of the ankle clamp around the
distal tibia just above the malleoli (Figure 20).
eXPert Advice: The three critical measurements in the
tibial resection are resection depth, slope and varus/valgus.
Care must be taken to resect adequate tibial bone and to match
the patient’s native slope for a knee with a functioning ACL.
• Posterior slope is adjusted by depressing the button
on the side of the EM tibial guide base and moving the
base forwards or backwards to allow the tibial cutting
block (with 7 degrees of slope) to replicate native slope.
The tibial posterior slope guide (32-700430) can be
used to assist in assessing slope (Figure 21).