47
Mix the bone cement according to the respective manufacturer’s instructions. Clean, wash
and dry the bone bed suffi ciently. Modern cementing techniques using a vacuum mixer and
jet lavage are recommended.
The RT-PLUS™ Modular knee is used with cement, with the exception of cementless stems. First
cement the tibial component and then the femoral component.
Note
With sclerotic bone it is recommended to drill several holes using a
Ø
3.2 mm drill. This
improves anchorage between the bone cement and the bone.
Ti
6
Al
4
V stems:
The backs of the condyles and the box walls of the femoral component are
coated with cement. The back of the tibial component is coated with cement (back of plateau
and box). The Ti
6
Al
4
V stems are not cemented.
Important
When implanting Ti
6
Al
4
V stems, pay attention that the rotation alignments of the femoral
and tibial components correspond already when the stems are inserted to the defi nitive
implant positions. This prevents unnecessary rib notches occurring in the IM canal.
CoCr stems:
The medullary plugs are accordingly placed deeper than the components. It is
recommended to fi ll up the IM canals using a cement gun.
Implanting the tibial and femoral
components
In 90° fl exed position, the tibial component is
hammered using the corresponding impactor.
Excess cement is carefully removed. While
the cement is setting, the implant components
must be under continuous pressure.
Note
Make sure that cement is applied between
the fin connection and stem connection when
using tibial blocks.
Implanting the Components