If the facial nerve is anatomically intact, there is usually an available degree of return of function of the nerve depending on the perioperative handling of the nerve, and postoperative oedema and any damage to the nerve sustained because of the same.
The nerve usually continues to show recovery till almost two years (rapid improvement initially and slow thereafter.
The improvement will depend on the continued physiotherapy, as even if the nerve is good, without physiotherapy, there may be no recovery at all.