We often face various dangerous factors in life, car accidents, production safety accidents, falling objects, etc., which may cause serious cranial injury and cranial defects. If cranial defect occurs, it will have many adverse effects on the organism, and may even be life-threatening in serious cases, so cranial repair surgery is needed in time. Cranial repair surgery is a relatively routine procedure in neurosurgery, and the technique is relatively mature. The most important factor that affects the outcome of the repair should be the skull repair material. Some people ask what is the chance of infection in cranial repair, one is to do a good job of perioperative aseptic management, and the other is related to the repair material. For example, titanium mesh, a widely used traditional repair material, has a certain chance of postoperative infection, and there is no shortage of such cases in clinical practice. In addition, the titanium mesh material may cause rejection reactions, resulting in breakage of the scalp tissue and exposure of the titanium mesh. The titanium mesh is not insulated and can interfere with MRI CT examinations and so on, causing chronic pain, poor shaping effect, etc. There are quite a lot of problems. Therefore, titanium mesh material is not an ideal material for skull repair. Clinical practice has shown that the use of advanced polyetheretherketone (also known as PEEK) for cranial repair surgery can achieve very good clinical results. Because of its excellent properties, this advanced material is virtually free of postoperative infection. The PEEK material is a special polymer material that does not interfere with postoperative medical examinations and has become the latest trend in cranial repair materials.