Ottobock 17M1 Instrucciones De Uso página 9

3 Handling
3.1 Processing
CAUTION
Risk of injury due to use of improper materials. The ankle joints have been developed for the
fabrication of AFOs made of thermoplastic material. It is not recommended to use these ankle
joints in lower leg orthoses made in carbon lamination resin technique. Static loads would be
transferred directly into the joints and the stability would be jeopardised.
Please note that the Ottobock Ankle Joints, due to the different alignment parameters such as the
created forefoot lever load, are subjected to different loads.
For mounting the Ankle Joints please observe the following instructions.
• Determine the compromise pivot axis of the ankle joint, using the 743A7 Pivot Point Adjustment
Aid for example, and mark it on the plaster negative (fig. 3).
• Pierce through the marked pivot points and position the Alignment Tube (fig. 4 + 5).
• The reinforcement bar used to fix the plaster positive must not be in contact with the tube to
prevent it from distorting (fig. 6).
• Cut the tube ends on the plaster positive flush with the plaster's contours (fig. 7).
• Clamp the plaster positive, for example in the 743A7 Pivot Point Adjustment Aid, and determine
the joints' alignment lines (fig. 8).
• Fully screw the long alignment screws through the threaded pivot holes of the joints and insert
them into the tubes. Lay up the joints to the alignment lines on the plaster positive and using
Bending Irons adapt the joint bars to the shape of the cast (fig. 9 + 10).
• Attach the adapted joint bars with Moulding Clay or similar and small pins to the plaster positive.
• The Moulding Clay must be trimmed flush with the joint bars' contours (fig. 11).
• Prepare for vacuum forming with 99B25 Nylon Stockinette (2 layers) or similar.
• Vacuum form as usual with the desired thermoplastic material (fig 12).
• Mark and cut to the trim lines and grind the cut edges smooth (fig. 13).
INFORMATION
At the foot stirrup, the cutting edge must be directly below the joint to achieve as much contact
of the foot stirrup as possible.
• Pierce through the screw holes for fixing the joints using a pre-heated bradawl, for example,
and rework the holes to fit the screws. (fig. 14)
• Attach the joints with screws. Do not forget to apply 636K13 Loctite before final delivery of the
orthosis. Shorten any protruding screws (fig. 15).
INFORMATION
Make sure to fully screw the attachment screws into the threads!
Make sure to secure the joints' fixing screws with 636K13 Loctite before delivering the orthosis.
17M1=1, 17M1=2 / 17M2=1, 17M2=2 Ottobock | 9