As the number of people with skull defects increases each year, more and more people are choosing to restore the integrity of the skull through cranial repair, restoring a safe and stable environment within the skull and improving the aesthetic appearance. Cranioplasty is a neurosurgical procedure to repair cranial defects caused by a variety of reasons, and the technology is relatively mature and safe. If a skull defect is not repaired in a timely manner, the patient is in constant danger. It is very easy to be injured by external aggression, which is very dangerous and can sometimes even be fatal. Cranial defects may also cause unstable intracranial pressure, cerebrospinal fluid circulation and blood circulation within the skull are affected, and all neurological functions and vital activities cannot operate normally, and may also cause cranial defect syndrome. Most of the patients also suffer from long-term depression due to the unsightly appearance of the skull. Patients who have undergone cranial bone repair surgery have a new skull, restoring the original appearance of the skull and greatly improving their face value. In addition, a complete skull can rebuild a closed and stable cranial cavity environment, play a strong protective role for the brain and intracranial soft tissues, and guarantee the good operation of intracranial blood circulation, cerebrospinal fluid circulation, and various neurological functions. Repair material as a skull repair surgery affects the effect of a major important factor, how to choose the right is very important, good materials can achieve better repair results, but if the material is not selected properly may cause some adverse reactions. For example, some local hospitals use titanium mesh material for skull repair, and sometimes there are uncomfortable symptoms. For example, titanium mesh is not insulated, in hot and cold environments, there will be headache and dizziness; titanium mesh cover type repair, the edge of the material may cause cutting damage to the scalp; and titanium mesh tissue compatibility is not very good, there may be rejection or postoperative infections, or even scalp tissue destruction, resulting in titanium mesh exposed. What should I do if the titanium mesh is exposed in cranial repair? If the titanium mesh is exposed, it is recommended to go to the hospital as soon as possible for detailed examination and symptomatic treatment. If necessary, the titanium mesh can be surgically removed and replaced with peek material, which is very close to the human skull in all its properties, and its performance is significantly better than that of the traditional titanium mesh. Our trauma neurosurgery team has carried out hundreds of cases of peek cranioplasty in recent years, and the postoperative follow-up shows that the probability of the occurrence of various after-effects of the peek cranioplasty is much lower than that of the traditional titanium mesh.