Craniosynostosis is a relatively common disorder that can be caused by many risk factors in life, such as traffic accidents, falling objects, and craniosurgery. Craniosynostosis occurs regardless of age, and people of all ages can suffer from this disorder, including many children. What should children with cranial defects do? In fact, no matter children or adults, once a cranial defect occurs, cranial repair surgery should be performed in time to restore the normal intracranial environment and neurological function as soon as possible. Otherwise, if it is not repaired in time, it may cause a lot of neurological damage to the body, and may even have an accident and injure the brain tissue, with very serious consequences. Then, it is very important to choose materials for skull repair surgery, especially for children with skull defects, it is more important to choose good materials for repair, so that it can be beneficial to the recovery and future growth of children. For pediatric patients, the most ideal cranial repair material is polyetheretherketone PEEK, a special polymer material with excellent performance. Unlike traditional titanium mesh materials, PEEK has excellent histocompatibility and does not produce rejection; PEEK is shaped in three dimensions based on the patient’s cranial CT data and highly restores the physiological structure of the skull; the PEEK skull is embedded in the repair, and the repaired skull has a smooth appearance and will not grow. PEEK material is embedded in the skull, so that the skull can be repaired smoothly and without cutting injuries like those caused by titanium mesh-covered repairs; PEEK material has good radiation transmission and does not affect postoperative medical examinations; in addition, the performance of PEEK material in terms of elasticity, strength, thermal insulation, and stability is comparable to that of human skull, making it a very ideal material for skull repair.