There are accidents everywhere in life, and also because of the coming of certain accidents that cause some trauma to people’s body. Currently there are many people who need to undergo craniotomy because of a traumatized brain due to an accident, and after craniotomy and debridement surgery, some patients have the problem of cranial defects. Cranial defects have a great impact on health, because the skull is an important umbrella for brain tissue, once the skull is defective, the brain tissue lacks protection, and it is easy to suffer from external aggression. Timing of Cranial Repair Surgery: It is very necessary to do cranial repair surgery after cranial defects, but patients have to seize a good time to repair, so that the recovery will be better. How soon after cranial flap removal is cranial bone repair surgery performed? Generally speaking, if the patient has a huge cranial defect caused by cranial hypertension and decompression surgery of removing the large bone flap, the patient needs to do cranial bone repair surgery 2-3 months after the surgery, which is the best time. Cranial repair, the material is very important: However, in addition to finding the right time for cranial repair surgery, the choice of cranial repair material is also very critical, the material is good or not directly affect the success or failure of the operation. From ancient times to the present, there are a lot of materials used to do cranial bone repair, such as bone cement, animal bone and so on, but because of the existence of all kinds of defects, has long been eliminated out of the game. And now most of the hospitals are using titanium mesh materials, titanium mesh and traditional materials compared to the progress of many, but there are some inevitable problems, patients should also be careful to choose. New polyether ether ketone PEEK material with excellent performance: According to the survey, the ideal material for cranial bone repair surgery is polyether ether ketone PEEK material, which is an advanced polymer material, better than titanium mesh material repair effect, its various properties are very excellent, and even with the autologous cranial bone is equivalent to the choice of this material to do cranial bone repair surgery is no better. Clinical implementation of peek cranial bone repair has achieved outstanding results, effectively preventing temporal muscle atrophy, preventing scalp abrasion, maintaining tissue activity, and ensuring normal nerve function, which is highly acclaimed.