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Ray, if you can't extend your fingers after this surgery, most likely it's due to something going on with the PIN (Posterior Interosseous Nerve). It's a branch of the radial nerve, and it controls the muscles that, well, extend the wrist and fingers. The nerve may or may not recover, as you've been told. It may take weeks to months for it to recover, too.
In the meantime, make sure you are passively extending those digits (use your other hand to extend and even hyperextend them). You don't want the ligaments and joints to get stiff and then be stuck in that flexed position, even after the PIN recovers. Your therapist should also be able to make a thermoplastic wrist splint to help keep those fingers "up."
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1987 Venetian Blue (looks like grey) 930 Coupe
1990 Black 964 C2 Targa
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