This sure doesn't seem like a satisfactory result after all she has been through. Before I step way out of line and suggest that things could have been done better (not knowing all the detail of the case), we should consider another possibility. After the removal of a portion of the mandible, and frequently some of the muscle attachments that control its movement, it can be difficult for patients to "relearn" to open and close properly, let alone chew anything with an appliance sitting on top of the mandibular ridge. Biting the cheek etc. would not be an unlikely situation to occur. But the person who will be able to give you the best possible answer to her situation, is not the surgeon who is further removed from the final prosthetic results, but a prosthodontist who has done some of these types of reconstructions. Before you assume that a surgery is needed to realign her mandible, this would be a valuable consultation to determine exactly what the problem is, and what needs to be done to correct it. Maxillofacial prosthodontists are the experts in this area.