How long is the appropriate time to repair the skull? Cranial repair surgery is a common neurosurgical procedure to repair cranial defects caused by various reasons. No matter what the cause of the skull defect, it will cause a lot of damage to the organism, if not timely repair, it may cause brain bulging, brain herniation, brain atrophy, hydrocephalus, etc., and in serious cases, it may even be fatal. Therefore, timely cranial bone repair after the defect is very necessary. So how long is appropriate for cranial bone repair? This involves the timing of cranial bone repair surgery. For patients with open comminuted skull fracture with relatively clean wound and no cranial hypertension, one-stage cranioplasty is recommended; for patients with severe closed craniocerebral trauma, giant skull defect caused by decompression of cranial hypertension with removal of large bone flap, it is generally recommended to perform cranial bone repair surgery after a recovery period of 2-3 months. Of course, in addition to the timing of repair, the choice of cranial repair materials is also quite important. Clinically, there is no lack of postoperative adverse reactions due to improper selection of materials, for example, some hospitals use titanium mesh material for cranial bone repair, there are often postoperative rejection reactions, postoperative infections, scalp cutting pain, scalp does not heal, titanium mesh is exposed, etc.; in addition to titanium mesh insulation is not good, postoperative sensitivity to hot and cold reactions, titanium mesh metal will interfere with the patient to receive postoperative CT MRI and other examinations. Currently in the clinic, the use of polyether ether ketone PEEK material for skull repair surgery, it is a good solution to these problems. Professor Mu introduced, PEEK material has very good histocompatibility, non-rejection, non-infection, and embedded repair, there will be no cutting injury, peek material in the elasticity, insulation, stability and other aspects of the autologous skull are comparable to the cranial bone, it is very ideal cranial bone replacement material.