Some patients face the problem of cranial defect after decompression surgery, once the diameter of cranial defect exceeds three centimeters or more, it is necessary to go to the hospital for cranial bone repair within a reasonable time, in order to avoid headache, dizziness, nausea and vomiting and other adverse reactions, or because of cranial bone defects and bring the patient extreme lack of self-confidence and depression, nowadays, more doctors believe that the earlier the better the time to repair the cranial bone, advocating that as soon as possible to let the patient return to normal life without worrying about the collapse or bulging of the head to scare others. Nowadays, more doctors believe that the sooner the skull is repaired, the better, and advocate that patients with cranial defects should be allowed to return to their normal lives as soon as possible, without having to worry about scaring others because of the collapse or bulging of the top of the head. Heard many hospitals recommend the repair material is titanium mesh, the network is developed today, many patients will be conscious of the first to search the Internet, when it is understood that the titanium mesh may appear side effects of the inner will have a little concern, cranial repair titanium mesh impact how? From the present point of view, titanium mesh is not as hard as the new polyether ether ketone material, it is not able to protect the tissues in the brain, and polyether ether ketone material, also known as peek material is not only in the hardness of the excellent, the other properties are very excellent. For neurosurgery, cranial repair is a very routine surgical procedure, with peek material to repair the skull is an embedded surgery, it is through the head defective area for accurate replication, and then the use of 3D printing technology will be a perfect copy of the defective cranial bone, to the extent that the edges of the perfect fit, the patient will not produce the basic edge of the use of wear and tear of the situation. peek material is very strong impact resistance, and can be very good. Peek material is very strong in impact resistance and can well protect brain tissue from external environmental damage. Currently, more and more patients with cranial defects choose to use peek material for repair.