First of all, the problem of scars. Plastic surgery uses a special kind of fine needle and thread. After a year, there will only be a thin white mark on the epidermis. If the economy permits, you can choose some external scar-removing products, and the overall effect will be better.
Second, for the surgical effect. In addition to skin problems, whether bones and soft tissues (i.e. muscles and connective tissues) can achieve beautiful reduction will affect the surgical effect. What you need is facial plastic surgery. This part of plastic surgery is different from other parts, and the accuracy required is particularly high. Therefore, almost no one is 100% satisfied with the repair after severe facial trauma. Three years old fracture, in addition to the need to interrupt bone reattachment, there is a lot of fibrous hyperplasia in soft tissue, and the operation will be more difficult. One month after operation, due to edema and other reasons, the effect was temporarily not seen. However, if you really go to an advanced hospital, your appearance will definitely be greatly improved.
Finally, the cost of surgery is in a hospital like No.9 Hospital, and the surgery you need needs at least 10,000 yuan. The hospitals with the highest level in this field are Shanghai No.9 Hospital and Plastic Surgery Hospital of Chinese Academy of Sciences. Of course, if you are in Hangzhou, Zhejiang, it will be much more convenient to go to the Ninth Hospital. If you can go to the hospital to communicate with experts in person, I believe you will get more detailed answers.
I hope my answer will help you, and I sincerely wish you a satisfactory result!