Overview of Cranial Defects Cranial defects are a very common disorder in neurosurgery clinics. There are many risk factors in life that may eventually lead to cranial defects, such as traffic accidents, production safety accidents, falling objects, falls from height, etc., and cranial trauma followed by decompression surgery with bone flaps, or craniotomy due to cranial diseases (such as cerebral hemorrhage, intracranial tumors, cranial lesions, etc.) that cannot be immediately returned to the bone flaps, which often leave Cranial defects. Cranial defect syndrome Cranial bone plays an important role in supporting and protecting the brain, head and facial organs, and even in the smooth operation of the whole body. So what are the syndromes of cranial defects? Many. After cranial defect, the integrity of the cranial cavity is destroyed, the intracranial environment and intracranial pressure become unstable, which will affect the circulation of cerebrospinal fluid and blood circulation in the cranium and affect the normal operation of brain nerve function, thus producing a series of cranial defect syndromes. Specific manifestations may include dizziness and headache, unfavorable limbs, numbness and weakness, depressed mood, irritability, irritability, unexplained discomfort and various mental disorders, and some patients may have symptoms such as impaired vision, hearing impairment, lack of smell, etc. More serious cases may have seizures. Other hazards of cranial defects In addition to these syndromes, cranial defects may also have cosmetic, safety and security, and psychological trauma problems. After skull defect, the scalp will be obviously collapsed, or some patients will have scalp expansion, which will affect the aesthetic appearance; without the protection of hard skull, the brain will be at risk, and it may be injured by external invasion or sharp object impact, which may even be life-threatening; in addition, skull defect will cause psychological trauma and blow to patients, and many patients will have self-containment and low self-esteem, and they will not like to go out and meet others. Many patients will have self-containment, low self-esteem, reluctance to go out and meet people, etc. Therefore, patients with cranial defects should undergo cranial bone repair in a timely manner. The team uses PEEK, a new type of special polymer with excellent performance, as the cranial repair material, and continuously improves and upgrades the technology and material optimization design, and also innovatively introduces the concept of aesthetic plastic surgery, so as to carry out comprehensive PEEK cranial repair and plastic surgery, which can achieve the organic unity of anatomical integrity, functional perfection and aesthetic appearance, and achieve good results. The result is good.