Fabricating The Prosthetic Socket; Laminating The Transtibial Socket - Ottobock 4R220 Instrucciones De Uso

8) Position the silicone dummy on the piston dummy. Check that no excess
PVA bag is protruding during this process (see fig. 6).
9) INFORMATION: Do not close the discharge opening in the cylinder
body from the inside. Screw in the valve dummy after positioning
the cylinder body.
Position the cylinder body on the piston dummy. Perform the mediolater­
al alignment of the exhaust opening depending on the prosthetic align­
ment.
10) Isolate the heads of the cap screws with wax.
11) Fill the heads of the cap screws with Plastaband (see fig. 7).
12) Screw the valve dummy into the exhaust opening until the O-ring closes
the opening on the valve dummy (see fig. 8).
13) Close the slot in the valve dummy with Plastaband.

5.2 Fabricating the prosthetic socket

5.2.1 Optional: fabricating the check socket
Recommended materials: ThermoLyn (e.g. 616T52* ThermoLyn rigid,
>
616T83* ThermoLyn clear), 616S5* BetaSil
1) Prepare for fabrication of the prosthetic socket (see Page 24).
2) Attach two strips of Plastaband lengthwise over the cylinder on both the
anterior and the posterior side. This makes it easier to remove the cylin­
der after the trial fitting (see fig. 9).
3) Attach a strip of Plastaband circularly over the proximal edge of the cylin­
der to seal the prosthetic socket (see fig. 9).
4) Complete the vacuum forming process.
5) Finish the prosthetic socket (see Page 28).
6) If the prosthetic socket leaks: seal the transition from the cylinder
body to the inside of the prosthetic socket with BetaSil.

5.2.2 Laminating the transtibial socket

INFORMATION
The layup described in this document was approved for the maximum
product user body weight. The prosthetist assumes full responsibility for
any change to the layup.
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