The importance of the skull, which plays an important role in protecting the brain tissue, is very dangerous if a defect occurs in the skull, and a skull repair is necessary. And the timing of the surgery is very important. How long does it take for cranial repair? Generally speaking, three months after cranial defect is better, because whether it is trauma or cranial defect caused by debridement surgery, it needs some time to recover, and generally about three months, the original lesion can recover better. Of course, this time is not absolute and varies from person to person, some may take less time, some more time. As long as the recovery is good, the function is normal and the indication for surgery is met, the repair can be done. The material used for skull repair is also important. Nowadays, the new polyether ether ketone (PEEK) material is used for cranial bone repair, with three-dimensional reconstruction and precise anastomosis, imitating human bone material, which can be fused with autologous bone, perfectly restoring the original structure of the skull and achieving better repair results. It is favored by neurosurgeons and patients with cranial defects.