7 Alignment and Set-Up
Users be aware of potential finger trap hazard
Note:
The 1315S/1315T is a mechanical 4 bar knee. 4 bar knees are inherently stable, but
care needs to be taken to properly bench align the knee with the prosthesis.
BENCH ALIGNMENT:
a) With prosthesis assembled, taking into account hip flexion contractures, abduction,
Line Of Progression, and toe out, the TKA plumb line should pass through the knee
center at the proximal/anterior pivot. Take into account shoe heel height, and add
3mm safety factor.
b) Foot placement versus the knee will be determined by the foot alignment
requirements. The knee should not tilt excessively more than 4 degrees anterior. It is
advised to follow up in 1-2 weeks to reassess the alignment.
c) The weight line should pass through the centerline of the knee in the Coronal or
M/L plane. Excessive outset or inset will put undue stress on the knee joint.
Set the bench alignment taking into account the heel height of associated footwear plus 3mm
safety factor!
