Cranial defects are a relatively common disorder. There are various risk factors in life, such as traffic accidents, production safety accidents, craniosurgery, etc., which can damage the skull and cause cranial defects. Cranial defects are very dangerous and must be repaired in time. In addition, the incomplete skull is also the abnormal intracranial pressure and intracranial environment, affecting the normal brain crest fluid circulation and blood circulation, affecting the neurological function and a series of cranial defect syndrome. . Therefore, it is very necessary to repair the skull defect in time. Of course, skull repair surgery is also a routine surgery in neurosurgery, and the technology is quite mature. One of the key factors in the surgery is the choice of repair material. Most hospitals tend to choose titanium mesh material, but this material is not very ideal and there are many problems. For example, the histocompatibility of titanium mesh is not very good, and there may be rejection reactions, and some occur postoperative infections, causing the titanium mesh to be exposed. Some patients ask what are the chances of cranial titanium mesh exposure. It should be quite high, and it is common for titanium mesh to be exposed after titanium mesh repair of the skull in clinical practice. At present, there is a very excellent polyetheretherketone material, which can well avoid the various problems of titanium mesh and can be used for skull repair to achieve more ideal results. This polyether ether ketone material, also called PEEK material, is a special polymer material with physical and chemical properties comparable to those of autologous cranial bone, and is a very good material for cranial bone repair.