This is the patient before surgery this is the skin expansion when it was completed this is the 1 year follow up after the expansion flap transfer repair. Most of the facial scars have been replaced with expanded skin on the forehead and neck, and this time, we are going to reposition the expander under the facial expansion flap again to repair the remaining facial scars after skin expansion. About the dilator treatment essays 1, dilator treatment cycle, generally speaking, 3 months, at present our research direction is to take measures to shorten the treatment cycle as far as possible, there is no scientific report that the longer the injection time the better the effect, generally need to prolong the injection time is mainly because of the dilator buried when the flap is separated from the uneven thickness of the flap, which affects the rhythm of the water injection. 2, dilator surgery hospitalization time, generally speaking 3 days, buried dilator and remove the dilator only need 3 days time can be, the operation is not smooth, postoperative recovery is not ideal may need to extend the hospitalization time. Liu Xinhai, Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences 3, the degree of utilization of the expanded skin, as far as possible, will be the full use of the expanded skin in both longitudinal and transversal directions, in order to avoid the waste of expanded skin. Scar patients themselves normal skin is in short supply, if there is no fear of wantonly wasting the patient’s expanded skin is tantamount to a crime. 4, the number of expanders buried, scar treatment should be based on the size of the scar and the surrounding skin specifics, can not be uniform, but the principle is to solve the problem as much as possible with fewer expanders, from the treatment time and cost are conducive to the patient, but should be as much as possible to solve the problem at one time, for different parts of the skin expansion should be completed as far as possible at one time, you can save treatment time, save treatment costs, reduce Hospitalization time, reduce the chance of infection in the hospital. 5, the choice of the size of the expander, mainly based on the size of the normal skin to be expanded and the amount of skin to be expanded. In most cases, according to the size of the normal skin around the scar, the expander can be over-expanded, but over-expansion will increase the pressure of the expander injection pot, increasing the risk of leakage of the expander, and then the small expander chassis is small, the skin can be expanded is limited, which ultimately affects the quality and quantity of the skin that can be expanded. 6, how to shorten the treatment time of the dilator, a phase of the surgery is very important, the expansion of the skin thickness uniformity, firm healing of the incision, no hematoma, infection and other complications, which is the determining factor of the ability to successfully inject water. 7, the treatment of scarring does not need to take great pains to have to suspend school or work, the key is to choose the right treatment method and technology comprehensive doctor. The key is to choose the right treatment method and a doctor with comprehensive skills. It is the fundamental principle to get the best result with the least cost.