Thermoplastic devices
PolyPropylene
We mainly use clear 'natural' poly in thickness 3, 4, 5 and 6mm. We also have the grey poly in 3, 4.5mm. Poly has been widely accepted worldwide as a good material for functional orthoses. It conforms reasonably well to the cast and holds shape well, unless prescribed too thin for weight.
Poly/PPT
These devices repesent the best alternative for a softer, more flexible device. The shell is pressed in 2mm poly and the inferior surface is filled with PPT. The PPT will not deform and supports the poly in it's pressed shape. PPT will however abrade and so a bottom cover of cambrelle is applied to resist this happening.