5.2.1 Bench Alignment
TT bench alignment
Recommended tools:
662M4 goniometer, 743S12 heel height measuring apparatus,
743A80 50:50 gauge, alignment apparatus (e.g. 743L200
L.A.S.A.R. Assembly or 743A200 PROS.A. Assembly)
Perform the alignment and assembly of the prosthetic components in the
alignment apparatus according to the following specifications:
Sagittal plane
Heel height:
Effective heel height (shoe heel height - sole thickness of fore
foot) + 5 mm
External foot rotation:
approx. 5°
a–p positioning, middle of the prosthetic foot to the alignment refer
ence line:
Positioning according to the table below
Connect the prosthetic foot and prosthetic socket using the chosen
adapters.
Observe the adapter instructions for use during adaptation and
installation.
Sagittal alignment:
Determine the centre of the prosthetic socket with the 50:50
gauge.
Align the prosthetic socket centrally to the alignment reference line.
Socket flexion:
Residual limb flexion of the patient + 5°
Frontal plane
Alignment reference line of prosthetic foot: between big toe and
second toe
Alignment reference line of prosthetic socket: along the lateral
patella edge
Observe the abduction or adduction position.
Foot size [cm]
23 to 27
Bench alignment process
a – p positioning, middle of the prosthetic foot
Mid-foot anterior to the alignment reference line
10 mm to 15 mm
Ottobock | 13