As an important human skeletal tissue, the mission of the skull is to protect the brain from external aggression, but when subjected to a huge impact of external forces, the skull is very easy to be injured, this time the intracranial tissues and the outside world is only separated by a layer of soft scalp, there is a great safety risk, patients can not be taken lightly. Cranial defects will directly affect the appearance of the image, because the defective part of the collapse deformation, the skull shape has become very strange, the patient’s psychological burden will be relatively large, and over time will become low self-esteem and depression. In addition to this, cranial defects can also cause health problems, such as destabilizing the intracranial pressure and intracranial environment, destroying the function of the brain nerves, and causing cranial defect syndrome. Cranial defects have many impacts, what patients need to do is to go to the hospital in time for examination, for patients who meet the indications for surgery, but also to actively do cranial repair surgery, in order to restore the integrity of the skull as soon as possible, to remodel the closed and stable intracranial environment, to avoid causing greater harm. What are the complications after cranial repair? This is what many patients are worried about, but in fact, cranial repair surgery is a routine operation in neurosurgery, the operation is very safe, and generally can get a good recovery after the operation. Of course, in order to reduce the chances of postoperative complications, it is important to choose good repair materials and a doctor with good technical experience. At present, the new polyether ether ketone peek material is more advantageous for cranial bone repair surgery, which is a very safe and advanced polymer biomaterials, and it has good performance in terms of stability, hardness, strength, insulation and histocompatibility, and it is a material very close to the autologous cranial bone.