Cranial repair process? The skull is one of the hardest bones in our body and plays an important role in protecting the brain tissue and maintaining a stable intracranial environment, which is vital to the normal functioning of life. Therefore, if a cranial defect occurs, it should be repaired in a timely manner. In addition, the soft tissues inside the skull are not protected by the hard shell and may be easily damaged by external forces; secondly, the unstable intracranial pressure caused by skull defect may also affect the normal operation of the life activities inside the skull. The external manifestation is that it may lead to frequent headache and dizziness, in addition to the patient’s fear of pulsation, expansion and collapse of the defect area, as well as fear of sunlight, vibration and even noisy sound. It may also cause lack of concentration and memory loss, and some patients show depression, fatigue, reticence and low self-esteem. Therefore, it is very necessary to perform skull repair surgery in time after skull defect. The procedure of skull repair: first anesthesia, disinfection, then scalp incision, exposure of the bone window, preoperative three-dimensional shaped polyetheretherketone PEEK repair piece, according to the shape of the patient’s skull defect adjustment reset and fixed, suture the scalp, the operation is completed. It is important to emphasize that not only is it important to standardize the correct surgical procedure for cranial repair, but the material used for cranial repair is also important. The PEEK material we use is an excellent material, which can be shaped in three dimensions according to the patient’s skull data and highly reproduce the anatomical structure of the skull, and its performance in terms of elasticity, hardness, heat insulation, stability, etc. is basically the same as that of the autologous skull, without rejection and without interfering with CT and MRI examinations. It is an excellent cranial bone replacement material and has become a new favorite in the cranial repair industry.