What should I do if my skull is sunken? If the skull is congenitally sunken in a large area, it is necessary to consider whether it is a cranial defect. It is very difficult to grow the depressed part of the skull, so it is necessary to wait for the child to develop well and undergo skull repair surgery. Of course, there are also many cranial defects caused by trauma, such as fights and falls, and cranial defects caused by debridement and decompression surgery. Regardless of the cause, craniosynostosis is a very serious disability. Therefore, early surgical treatment is necessary. The surgical treatment of skull defect, which is often referred to as skull repair, the repair material is the crucial choice in the surgery. To recent times, people abandoned the previous materials such as autologous bone and bone cement which were not excellent enough, and clinically, more titanium mesh and polyetheretherketone materials are used for repair. Titanium mesh material, i.e. titanium alloy material, is very widely used because of its cheap price and high cost performance. However, there are some disadvantages at the same time. Because of the material of titanium mesh, it is a thin metal material with higher thermal conductivity and poor heat insulation, which may cause sensitivity to hot and cold reactions; in addition, it may cause chronic pain and subcutaneous fluid accumulation in patients. In addition it has poor histocompatibility and resistance to compression. It is also more prone to deformation because of the poorer resistance to compression. This metal material will also affect the future to do various medical examinations, such as CT MRI ah, there will be artifacts, causing diagnostic interference. The latest clinical material for skull repair is polyetheretherketone, also known as peek, which is more histocompatible than titanium mesh. It is more comfortable and thicker. It is similar to human cranial bone. Especially for pediatric patients, it can better adapt to the growth and development of human autogenous cranial bone. And it will have a lower infection and rejection rate. More importantly, polyetheretherketone material is a material that can be plasticized in three dimensions, and it can be customized in three dimensions according to different patients. It really restores the physiological structure of the skull perfectly. However, at present, there are still relatively few hospitals in China that use peek material for cranial repair, if patients have such needs, they should still go to regular professional hospitals.