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

5) INFORMATION: No PVA bag is required for fabricating a check
socket.
Soak the shorter PVA bag and pull it over the plaster model.
6) Use string to tie off the PVA bag in the undercut of the piston dummy
(see fig. 5).
7) Cut off the excess PVA bag with a scalpel.
8) Position the silicone dummy on the piston dummy. Check that there is no
excess PVA bag is protruding (see fig. 6).
9) INFORMATION: Do not close the 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) Insulate 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 (see fig. 8).
13) Close the slot in the valve dummy with Plastaband.

5.2 Fabricating the Prosthetic Socket

5.2.1 Optional: fabricating a 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 2 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 system leaks: seal the transition from the cylinder body to the
inside of the prosthetic socket with BetaSil.

5.2.2 Laminating a Transtibial Socket

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