Hi there!
Well, the expected prognosis would depend on the extent of grafting. If only a small portion was involved and tendons were unaffected, recovery may be near normal; however if the joint was involved, the distal inter-phalangeal joint may not be rendered capable of movement. It would be best to discuss the expected prognosis in detail with your treating orthopedician.
Hope this is helpful.
Take care!
I meant to say the proximal phalange.