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For TF Prostheses please follow the recommendations for the alignment of the corresponding
Otto Bock knee joint.
5.1.2 Static alignment optimization
The prosthesis should be aligned with the L.A.S.A.R. Posture, if available. The Otto Bock recom-
mendations on alignment of transtibial and transfemoral prostheses should be observed.
5.1.3 Dynamic alignment optimization
Adapt the prosthetic alignment in the frontal plane (ML) and in the sagittal plane (AP) by angle
adjustments and/or sliding adjustments, in order to ensure correct heel contact, easy roll-over,
and optimal shifting of weight onto the contralateral side. For transtibial amputees please make
sure there is physiological knee flexion during stance phase.
5.2 Adjustment and final assembly
Due to the high forces in the adapter section, it is indispensable to tighten the adjustment screws
of the tube adapter with a torque of 15 Nm (135 lb-in).
Use 710D1 Torque Wrench. Once you have attained the final setting for the prosthesis, use 636K13
Loctite® to secure the set screws.
5.3 Heel Wedges
CAUTION
Risk of falling due to change of the knee dynamics when using heel wedges.
The use of heel wedges can facilitate stance phase flexion when bearing weight on the prosthesis.
Therefore, particular caution is advised during the dynamic alignment optimization – especially
when a knee joint without stance phase control is used.
In case the heel strike is too soft or the knee is in hyperextension during the mid-stance phase,
the heel can be stiffened by means of one of the two heel wedges delivered with each 1C64
prosthetic foot.
• "Soft" Heel Wedge (translucent)
• "Stiff" Heel Wedge (colour: black)
5.3.1 Heel Wedge Application
INFORMATION
Patients with a high activity level in MG 3 should initially test the foot without a heel wedge. For
patients with a high activity level in MG 4, Otto Bock recommends the application of a heel wedge.
INFORMATION
The heel wedge design does not require any adhesive to apply it to the prosthetic foot.
INFORMATION
The heel wedge is properly installed when the locking recess in the heel wedge is fully seated
around the mating stop (Fig. 3, Pos. 7) on the attachment spring.
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