21
8.2 TIBIAL BRIDGE TRAY
In some cases, if different femur and tibia sizes are required,
the surgeon should use the trial bridge tray.
The trial bridge tray is a baseplate which allows the use of
an insert with a different size to the tibia.
Two main cases are considered:
Case A: femur size 3 and tibia size 4.
43.
Because the size 3 femoral implant is compatible with size
3 insert, it is not possible to use a size 4 tibial implant
(compatible only with size 4 insert). In this case the surgeon
should use t4-i3 trial bridge tray, which has the same
coverage in AP and ML of a size 4 tibial implant and must
be used with a size 3 insert.
CAUTION
If a size 4 tibial implant is going to be implanted with a
femur of a smaller size (3+, 3, 2+, 2, 1+, 1) a bridge tibial tray
t4-i3 must be used.
Case B: femur size 4 and tibia size 3.
44.
Because the size 4 femoral implant is compatible with size
4 insert, it is not possible to use a size 3 tibial implant
(compatible only with size 3 insert). In this case the surgeon
should use t3-i4 Trial bridge Tray, which has the same
coverage in AP and ML of a size 3 tibial implant and must
be used with a size 4 insert.
CAUTION
If a size 3 tibial implant is going to be implanted with a
femur of a larger size (4, 4+, 5, 5+, 6, 6+ or 7) a bridge tibial
tray t3-i4 must be used.
For compatibility chart refer to chapter 11.
To Next Page
