smith&nephew RT-PLUS Surgical Technique page 7

Product Description
The joint mechanism has been designed in such way that all metal components (peg and
joint axis) interface with UHMW polyethylene to absorb the stress forces therefore prevent-
ing premature wear.
A modular stem connection allows the use of different stems to stabilize the femoral
component.
To compensate femoral bone defects, distal and/or posterior femoral augmentation blocks
can be fi xed to the femoral component.
The femoral component is available in sizes 2, 4, 6, 8 and 10.
Please see the available sizes in the implant table (from page 54 ff).
Femoral component
The femoral component is manufactured from
CoCrMo alloy and is asymmetrical.
The patellar groove is deeply hollowed out
and presents an anatomical oblique outline.
This feature offers improved patellar tracking
and leverage on the knee extensor appara-
tus.
The joint mechanism is contained in a narrow
box, the width of which is comparable to that
of a "posterior stabilized" implant. This allows
sparing bone resection, which reduces the
risk of femoral condyle fracture.
The rotation peg of 40 mm length provides
adequate security against dislocation, but
the components can nevertheless be easily
coupled. Because of the design of the con-
dyles, physiological "rollback" of 9 mm is
possible, which improves the fl exion capa-
bility of the joint.
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