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STS impression material is intended for use primarily in moulding the foot for the purpose of making a shoe last. It may also be used for last duplication or fabrication of orthotic devices for the foot, ankle, and leg. Application suitability should be the responsibility of qualified personnel.

Product characteristics:

STS impression material consists of a stretchy, tubular, fibreglass knit impregnated with a water curable polyurethane resin. Exposure of STS material to moisture or water initiates a chemical reaction which causes the tubular moulding material to be- come rigid. Finished moulds or lasts made from STS material are strong, lightweight and replicate the limb extremely well.

Product storage:

Each roll of STS material is packed in a sealed foil pouch. Care should be taken to avoid puncturing the pouch as this will cause the STS material to harden prematurely in the package. STS should be stored in a cool, dry atmosphere. Extremes of temperature and humidity should be avoided. Each pouch should be gently squeezed prior to opening to check suitability for application. The roll of STS material should feel soft and pliant. Do not use material that feels hard. For optimum perform- ance, rotate stock.

Benefits of use:

• Reduces casting time
• Cure time in less then 5 minutes
• More accurate then fiberglass rolls
• Virtually eliminates all wrinkling and provides excellent conformity
• Glass-smooth finish is ideal for CAD/CAM
• Cutting strip and Channel tube included for safe and innovative removal
• No toe contractures
• No more concerns about plaster clogging drains or getting on your clothing, furniture or floor
• No more cast cutter
• No more staff time wasted cleaning room
• No more need for special “casting rooms”
• No more waiting until the next day to ship the cast to your central fabrication laboratory
• No more special packing of plaster casts to prevent damage during shipping

 

Application instructions:

Precautions:

The polyurethane resin in STS material will adhere firmly to unprotected skin and to clothing. Protective latex examination or surgical gloves should be worn while handling the material. Care should be exercised to avoid contacting unprotected areas of the skin of the patient during application by using a plastic bag. Swabbing lightly with alcohol may help in removing resin from the skin if done immediately.

 

1. With the foot at 90° to the leg, place cutting strip on dorsum of foot. Fig. 1
   
   
   
2. Tape Channel tube on top of cutting strip. Fig. 2
   
   
3. Place plastic baggie of appropriate length on foot and leg. Fig. 3
   
   
   
4. Dip sock in cool water. Then gather moistened STS Sock and slip on foot. Fig. 4
   
   
5. Completely apply the sock to foot and leg. Stretch out any wrinkles, leave no overlapping, thoroughly massage sock to shape of foot, ankle and leg. Fig. 5
   
   
   
6. Place foot in desired neutral position, (Fig. 6a) or in a semi-weight bearing foot position (Fig. 6b).
   
   
7. Mark malleoli, 1st and 5th metatarsals heads or boney prominences with indelible pen. Fig. 7
   
   
   
8. Remove channel tube. Fig. 8
   
   
9. Cut sock with scissors or letter opener over cutting strip. Fig. 9
   
   
   
10. Spread cured STS sock and remove from foot and leg. Fig. 10