Here is my original question and the responses concerning plastic choice for
blister formed sockets:
> We are considering reducing the numbers of, or totally eliminating, the
use
> of laminated prosthetic sockets in favor of blister formed sockets. I’m
> interest in comments about the best choice of materials for definitive
> blister formed socket fabrication considering strength and durability,
ease
> of finishing, resistance to shrinkage, final appearance, etc.
Response summary:
We have not done a lamination here for nearly twenty years. We use
orthopedic grade polypropylene 12X12 3/8″ for TT and 16X16 1/2″ for TF.
Shrinkage is minimal–don’t force cooling time.
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We have used 1/2″ copoly. We see a lack of definition distally and some non
smooth transitions
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In your region, it would have to be polypropylene (co-polymer for colder
climates). Personally, I went from plastic (which does have its advantages)
to composite because I hated accounting for shrinkage and that the
calculated accommodation changed over time.
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they work great and some people are more comfortable in them but they don’t
look very good in my opinion.
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Use polypro along with the thermoplastic adaptor from American prosthetics.
There will always use shrinkage, if you use CAD/CAM you can compensate with
a percentage adjustment.
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Thanks to everyone that responded.
Jim Thelen, LPO, CP, BOCO
