Repair surgery is required for any damage to the skull. Why does it have to be a repair surgery? Because skull damage not only affects aesthetics, but also brings a sense of insecurity to the patient, and even causes cranial defect syndrome, brain atrophy, traumatic epilepsy, and many other adverse consequences. The scalp and dura mater not supported by the skull can compress the brain tissue under the direct effect of atmospheric pressure, and the brain tissue not protected by the skull can be displaced for a long period of time with the change of body position, resulting in the change of blood circulation in the brain, or due to the adhesion and displacement of the scalp and the dura mater, so that the subarachnoid space disappears, the cerebral cortical perfusion decreases, and the softening foci of the brain tissue under the window of the bone increases, and traumatic cysts, brain penetrating deformities, and ventricular asymmetry can be formed. Then when is the better time for cranial bone repair surgery? The timing of cranial bone repair surgery is the most frequently asked question by patients with traumatic brain injury cranial defects. Generally speaking, cranial bone repair surgery should be performed 3-6 months after craniotomy. For closed craniocerebral trauma with a well-healed incision, cranial bone repair surgery can be performed 3-4 months after surgery. For patients with open craniocerebral trauma, the risk of postoperative infection is higher, and cranial repair surgery is usually chosen to be performed 4-6 months after surgery. Of course, the specific timing of the operation should be selected according to the patient’s specific situation, so patients should be regularly reviewed after the cranial flap surgery, so that the doctor can grasp the changes in the patient’s condition, in order to determine the appropriate time for surgery. What materials are generally used for cranial bone repair and how about peek material? peek material is today’s hospital history of a more advanced material, it has high temperature resistance, self-lubricating, easy to process and high mechanical strength and other excellent performance of special engineering plastics. 1, corrosion resistance, anti-aging 2, resistance to dissolution; 3, high temperature and high frequency and high voltage electrical performance conditions 4, toughness and rigidity both; 5, size requirements for precision conditions 6, irradiation resistance, wear resistance, corrosion resistance conditions 7, hydrolysis resistance, high temperature and high pressure can still maintain excellent characteristics; 8, lightweight replacement of metal for fiber optic components 9, wear resistance, anti-static electrical insulating performance is good; 10, the mechanical strength of the required parts of the high 11, low soot and Toxic gas emission.