Content
- 1 J-form strut
- 1 sock
- 1 sticking kit
- 1 malleolar clip - 1 inter mediate pieceØ30/Ø34
1- Description and functions
Dyna J foot includes three main components : two composite parts and a cosmetic cover. The J-form strut and the
sole allows energy storage and return, and provides flexibility in inversion-eversion to ensure adaptation to the
ground. The polyurethane cosmetic cover upholsters the structure and ensures a good position in the shoe. Thanks
to these components the foot behaviour is flexible and dynamic.
2- Specifications
Dyna J foot is designed exclusively for lower limb prostheses. It is appropriate for
active patients up to 100 Kg or very active patients up to 90 Kg. The heel height
can be adjusted from 5 to 22 mm. Dyna J includes a tube and an intermediate
piece Ø34 that will be sticked to allow the use of standard connectors Ø34.
3– Assembling : (without the patient) fig. 1 and 2
Place assembling tee 1A41004 in the vice (or a 250x30x4 plastic plate) and put the half-soles on each side of the plate. Use
wedges (Heel height H + 2 mm) to simulate heel height. Position the J-form strut, the reinforcing plates, the washers (with spheric
side on the bevel) and the screws according to fig.2. Tighten the screws with a 10 mm hex wrench to get a 8.5±0.5 Nm tightening
torque and check dimension A.
Fig. 1
4-Alignment : fig. 3
To align the prosthesis you must be able to modify the foot antero-
posterior position and tilting (±9°).
Slip the cosmetic cover on the foot, then put them into the shoe. Cut
the tube at the desired length + 1 cm. Sand the tube end until you
reach the fiber, then remove dust and degrease. Apply on the tube
and on the intermediate piece Ø30/Ø34 some of the glue supplied,
fit them and let dry. Place a Ø34 tubular adaptor with a 35 mm mini-
mal depth.
You can also use 1D47 tube holder for sticking. In that case, use
1D41 tube holder at fitting trial, then at finishing stick 1D47 connec-
tor.
In order to avoid foot rotation, you must necessarily use a connector
for sticking or the supplied intermediate piece.
Finish the assembly so that the position indicated in fig 2 is kept.
Place the foot forward or backward, so that the load line falls at the
posterior third of the foot.
If you cannot find easily your patient load line, you can consider that
it falls from 2 to 3 cm in front of the axis of the internal malleolus of
the sound ankle.
Dyna J Foot
Assembling Instructions
- 2 half soles
- 1 cosmetic cover
1A410
- 2 screws, 2 washers Ø6
Activity
Moderate
Normal
High
Fig. 2
Line whuch is per-
pendicular to the
assembling tee
A= 2 to 3 mm
For more flexibility at step
completion A= 5 to 10mm
Heel height + 2mm
Coxo-femoral
joint centre
Knee Joint
centre
Knee in
extension
1/3
2/3
1A41099-0117- Page 1/8
- 2 reinforcing plates
Module selection guide
Patient weight
54 to 62 62 to70 70 to 80 80 to 90 90 to 100
1
1
2
3
1
2
3
4
2
3
4
5
Center of J-form strut at
the place where the tube
begins to decrease
We can modify heel
height and increase
foot flexibility by mo-
difying the position of
the J-form strut relative
to the half-soles.
Vertical axis
going through
the socket
centre, the tube
centre and bet-
ween the 2nd
and the 3rd toes.
(Kg)
4
5
N/A
Fig. 3