Can Erb S Palsy Be Completely Cured?

My daughter is suffering from Erb s palsy at the right hand ... Thats due to prolonged labour and critical (normal) delivery - Doctors said. But my Child was suffering, i was crying .. she was not able to use her hand .. but there was grip in the fingers .. We took her to Vellore CMC Hospital- Hand surgery department, Dr Anderson suggested physiotherapy and there was improvement ... On her third month she was lifting her hand to an extend ... she turns 3 next October ... Now she is recovered around 80-85% ... Can someone tell me ... can this be completely cured?? Is there any advanced technology which can help the baby escape from a muscular surgery that making the muscle around C5-C8 nerves rigid / stiff ??? A million thanks for the suggestions .... -Kavitha (Bangalore) YYYY@YYYY