Patients with cranial defects are in need of cranial repair, as it affects the aesthetics and also disrupts the circulation of cerebrospinal fluid, which is very harmful to the organism. What causes cranial defects? In everyday life, however, there are various risk factors that may cause damage to the skull, such as traffic accidents, brain surgery that has to be performed due to cranial diseases, and so on, which may result in cranial defects. This will expose the brain to external dangers, destabilize the intracranial environment, cause blood circulation and cerebrospinal fluid circulation disorders, and affect the operation of various neurological functions, which is very harmful to the organism, and sometimes even fatal. Therefore, once a cranial defect occurs, it is necessary to carry out cranial bone repair surgery in a timely manner. In cranial bone repair surgery, the choice of repair material is quite important. Clinically, there is no lack of examples of improper selection of cranial bone repair materials, resulting in the failure of repair surgery or postoperative adverse reactions. For example, the commonly used titanium mesh material is not ideal. Postoperative rejection may occur, postoperative infection may occur, scalp tissue destruction, titanium mesh exposed, and have to remove the titanium mesh, then this repair is also a failure. In addition, titanium mesh also has bad insulation, not easy to shape, interference with nuclear magnetic CT examination and other problems, so titanium mesh is not the first choice of cranial bone repair material. Currently, there is a more excellent cranial bone repair material, called polyether ether ketone, also known as PEEK material. This polyether ether ketone cranial bone repair can effectively avoid all the above problems, to achieve very ideal repair effect. peek material is a very good repair material. Because it is closer to the skull, the whole and the skull of the material is very similar, so that it can reduce the rejection, can achieve a complete repair of the skull.