This is a head plastic surgery consultation to make the flat back of the head stick out more roundly. After searching, I found out that there are 5 famous head plastic surgery hospitals. (H, Sculpture, Item, Dr. Bone, Ohin) 1. H - Using 3D printer 2. Sculpture - Injection 3. Item - Injection 4. Dr. Bone -Injection 5. Oin-Injection and 3D printers all use bone cement materials. Using a 3D printer, the implant can be manufactured accurately in advance to fit the shape of the head, so the size can be freely created. The implant is smooth and there is no gap between the skull and the implant, so it is not noticeable when touched or viewed from various angles after surgery. On the other hand, the surgery cost is expensive (more than 10 million won), and if the incision area is large and the implant is large, the tension increases when the skin is closed, which may cause hair loss. The advantage of injection surgery is that the risk of hair loss is relatively low due to minimal incision, and the cost of the procedure is low . It is cheap (about 3 to 4 million won), but since bone cement must be injected into the head to create the shape of the implant, the size of the implant cannot be made accurately. If the amount injected is insufficient, satisfaction with the size may decrease, the implant may be bumpy, and the incision site may be damaged. There are disadvantages in that depression scars may occur and the interface between the skull and the implant is not smooth, so it may be visible when touched or viewed from various angles. When producing implants using a 3D printer, a 3D head CT scan is required, which costs about 300,000 won. If you use a 3D printer, you can be satisfied with an accurate shape compared to injection surgery, but if you get greedy and make the implant bigger, there is a risk of hair loss. If you use injection surgery, the shape may not be accurate and may be bumpy. Even if you are less satisfied, you are a little safer from hair loss . I'm really worried about which one to choose.