The skull is an important bone, not only for aesthetic appearance, but also for health. If a person’s skull is sunken, it will not only be unattractive, but also bring some other physical hazards if left untreated for a long time. Without the external protection of the skull, the brain tissue can function and work normally, but without the protection of the skull, danger can happen at any time. Can skull depressions be restored to flatness? It depends on the specific case and will be treated by a professional neurosurgeon. In severe cases, it may be necessary to surgically remove part of the bone flap, which will leave a cranial defect that will require a later cranial repair to restore flatness. However, when doing skull repair surgery, the key point is the choice of material, good material can achieve more ideal repair effect. At present, many hospitals are using titanium mesh material for skull repair. Titanium mesh material has made some progress compared with some earlier materials in the past, but there are still some shortcomings and defects, such as possible postoperative rejection, possible infection, affecting postoperative examination, material exposure and so on. Our team uses a new polyetheretherketone PEEK material to operate on patients. This is an advanced polymer material that is very stable in all properties and almost comparable to autologous cranial bone. The team also conducts more in-depth research and exploration, constantly innovates and upgrades the technology, introduces the concept of aesthetic plastic surgery, and performs comprehensive PEEK cranioplasty to make the repair more natural and beautiful.