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1- Description and functions
The DynaStar foot includes the following main components :
A carbon fiber blade that allows for energy storage and return, as well as inver-
sion/eversion at forefoot.
A light alloy f rame that ensures heel strike and transfers the stresses to the
blade.
These two parts are linked by an elastomer axis that provides inversion/eversion
of the foot and a good transfer of weight bearing from the heel to the forefoot.
A polyurethane cosmetic shell which transmits the mechanical stresses between the shoe and the composite struc-
ture.
A sock in technical fibers reduces noises and wear due to contact between the cosmetic shell and the structure.
Thanks to these components, the foot has a comfortable and flexible behaviour.
2– Indications, maximum weight and connecting components
The Dynastar foot is designed exclusively for lower limb prostheses. It
is appropriate for patients with low, medium or high activity level whose
weight (carried load inclusive) complies with the following table.
The DynaStar foot is designed for a 10 mm heel height. It includes a
male pyramid that allows for the use of standard connectors available
on the market. Thanks to these connectors, the heel height can be ea-
sily modified f rom 0 to 20 mm.
3– Assembling (without the patient)
Place under the foot a wedge of the same height as the shoe
heel. Fix the female pyramid connector to the foot, taking
care that its axis be perpendicular to the ground (fig. 1).
4- Alignment (with the patient): Place the foot so that the load line
goes through the posterior third of the foot (f ig. 2)
Coxo femoral
joint center
Knee joint centre
Load line :
≈ 15 mm in front of
the pyramid axis
Notes:
- Increasing equinus provides a more dynamic alignment. It increases energy return at step completion.
- If the foot seems too long during transf er to the forefoot or if heel support is too flexible, you have to position the foot
behind the socket.
- If heel support seems too hard, or if the foot seems too short during transf er to the forefoot, you have to position the
foot ahead of the socket.
1A500
Assembling instructions
Knee in
complete
extension
1/3 2/3
Heel height
Verical axis going
through the socket
centre at the knee level
and the pyramid centre
Fig. 2
Module selection guide
Patient weight (Kg)
45 to 60 60 to 80 80 to 100 100 to 125
Activity
Moderate
2
2
Normal
2
3
High
3
4
Vertical axis
Front view: The axis
goes between the 1st
and the 2nd toes
1A50099-0117- Page 3/8
3
4
4
5
5
N/A
Fig. 1
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