Cranial defects are a very common neurosurgical disorder. Large cranial defects can cause serious harm to the body and require timely cranial repair. Does cranial repair help the brain to recover later? From our work experience, cranial repair can be very helpful in the later stages of recovery. After surgical repair of cranial defects, whether using autologous or artificial materials to cover the area of cranial defects, a cranial cavity can be kept intact to avoid the pressure of external atmospheric pressure on the brain. Through clinical and scientific experiments, there is ample evidence to show that cranial repair surgery has significant improvement on local blood flow. Therefore, cranial repair surgery can greatly help the recovery of the brain. What are the materials used for cranial repair? The materials for cranial bone repair have progressed over the past 20 years, starting with plexiglass, developing into bone cement, then titanium mesh, and in recent years, polyetheretherketone PEEK. At present, the main clinical use is titanium mesh and PEEK, and the others are no longer used clinically. peek cranial repair material advantages and disadvantages peek material full name is polyether ether ketone material, is currently the most ideal material for cranial repair, it is personalized according to the patient’s head CT data for three-dimensional reconstruction, the use of 3D printing technology to produce a smooth and perfect fit for the patient’s cranial defects, polyether ether ketone material is the main advantage of the material is light, low density, high strength, and The advantages of polyether ether ketone material are mainly that the material is light, dense, strong, and resistant to blows, and non-conductive, non-heat and cold conductive, so that the patient does not have any foreign body sensation after implantation. There is no obvious disadvantage of polyetheretherketone material, if there is a disadvantage, it is slightly expensive.