BIOMET VANGUARD XP, Руководство пользователя

Страница: 25 / 40

Figure 39 Figure 40
23
Tibial Resection with Intact/
Functional ACL (cont.)
Flexion/Extension Gap Check
• Check the flexion and extension gaps with the tibial
spacer (32-700040) to ensure that there is adequate
spacing (10 mm should be able to easily be inserted)
(Figure 39).
- If the space is less than 10 mm:
º Check that the entire meniscus has been removed.
º Check that the back of the tibia has been fully resected.
º Check that the posterior femoral osteophytes have
been removed.
Note: An alignment rod can also be used with the spacer
block to assure proper varus/valgus alignment and slope.
Tibial Preparation
Tibial Sizing
• Place the knee in maximum flexion with a Z-retractor
medially and laterally to provide maximum exposure.
• Select the tibial template (from 32-700042 to 32-700052)
size that provides the appropriate A/P and M/L
coverage (Figure 40).
• Perform an extramedullary alignment check by placing
the 1/4” alignment rod through the tibial template handle.
eXPert Advice: It may be necessary to trim additional bone
from the anterior side of the bone island (up to the ACL
insertion) to allow the tibial template to shift posteriorly.
To optimize flexion and prevent posterior edge loading,
the posterior tibial tray should cover as much of the
posterior tibia as possible.