Kitten's paw knuckling

[wcpmcp]

One of our kittens got hurt somehow; either fell or something. Anway she hurt her left back leg. Xray shows crack where her leg fastens to her pevis. Also her pelvis is separated from her spine. Vet has assured me both will heal. However he is afraid she has nerve damage as she is knuckling her paw. We have her on cage rest. This happened not quite a week ago. Vet wants to keep her on cage rest for at least 3 to 4 weeks. He is hoping the nerve damage is temporary; if not, he is saying we might have to amputate her leg. My question is, do kittens get over this 100% or how often is amputation necessary. Worried in Nebraska.