Repair surgery is required for all skull damage. Why is it necessary to perform repair surgery? Because skull damage not only affects aesthetics, but also brings insecurity to patients and even causes a variety of adverse consequences such as cranial defect syndrome, brain atrophy, and traumatic epilepsy. The scalp and dura mater not supported by the skull can compress the brain tissue under the direct action of atmospheric pressure, and the brain tissue without the protection of the skull can be displaced with the change of body position for a long time, causing the change of blood circulation in the brain, or the subarachnoid space disappears due to the adhesive displacement of the scalp and dura mater, the cerebral cortical perfusion decreases, and the softening foci of the brain tissue under the bone window increase, which can form traumatic cysts, cerebral penetration malformation, and ventricular asymmetry, etc. So when is it better to perform cranial repair surgery? The most frequently asked question about the timing of cranial repair surgery is for patients with traumatic brain injury cranial defects. In general, cranial repair surgery should be performed 3-6 months after craniotomy. For closed craniocerebral trauma, cranial repair surgery can be performed 3-4 months after surgery if the incision is healing well. In patients with open craniocerebral trauma, the risk of postoperative infection is higher, and cranial repair surgery is generally chosen to be performed 4-6 months after surgery. Of course, the specific timing of surgery should be chosen according to the patient’s specific situation, so the patient should be reviewed regularly after craniotomy debridement so that the doctor can grasp the changes in the patient’s condition to determine the appropriate time for surgery. What materials are generally used for cranial repair?How about peek material? peek material is a more advanced material in the history of today’s hospitals, it has high temperature resistance, self-lubricating, easy processing and high mechanical strength and other excellent performance of special engineering plastics. 1, corrosion resistance, anti-aging 2, resistance to solubility; 3, high temperature, 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 pressure can still maintain excellent characteristics; 8, light weight instead of metal for fiber optic components 9, wear resistance, anti-static electrical insulation performance; 10, mechanical strength requirements of high parts 11, low soot and toxic gas emissions.