Prosthetics Lower Extremities - Kinetech Medical

Alignment of Modular Leg Prostheses
Leg Prostheses
for Children
Modular Lower
Limb Prostheses
Initial/Interim
Prostheses
Alignment
Leg Prostheses
Bench alignment or plumb line alignment
The L.A.S.A.R. Assembly is designed for bench
alignment of modular lower limb prostheses.
It is available as a Floor model 743L200/250
and as a Bench Top model 743L300/350.
In sagittal and frontal views, three laser
lines are projected medially, laterally and
anteriorly on the prosthesis or orthosis as
alignment reference lines.
For the three-dimensional alignment of a
modular lower limb prosthesis, the knee joint
is fixed in the apparatus, while the prosthetic
foot, other prosthetic components and
socket are mounted in accordance with the
alignment recommendations.
When aligning a transfemoral prosthesis according
to the Otto Bock alignment recommendations,
the knee joint is used as the basis
in the L.A.S.A.R. Assembly. The knee joint
is fixed with joint-specific brackets (adapter
inserts) at the alignment reference point (single
axis joints = rotation axis; polycentric joints
= anterior upper axis).
The recommended position of the alignment
reference point is 20 mm above the medial tibial
plateau.
The socket is positioned so that its sagittal
proximal center coincides with the alignment
reference line. The socket flexion should be
set to a 3-5 degree angle, though it may vary
in different situations (e.g. in the case of hip
joint contractures). The center of the foot is
normally placed 30 mm in front of the alignment
reference line and mounted with plantar
flexion. Add 5 mm to the effective heel height
(see illustration for 3R90). The outer position
of the foot can be adjusted freely. The frontal
alignment is based on the anterior projection
of the laser beam.
Further information on the topic ”alignment recommendation“
can be found in the DIN A1
Poster with order number 646F219=GB.
3R90 Bench Alignment
3R60 Bench Alignment with 743L200/300 L.A.S.A.R. Assembly
34 Otto Bock HealthCare GmbH | Prosthetics – Lower Extremities | www.ottobock.com