A missing piece of the skull sounds scary, and the consequences will be even more serious if it is not treated in time. Because the skull is a barrier for the brain tissue, under the protection of the skull, the brain tissue will not be easily attacked by the outside world. Once the skull is defective, the intracranial tissues will be in danger, which is bad for your safety and health, so go to the hospital for skull repair surgery. Any surgery is a matter of timing, and a good timing is more beneficial to the surgery, and skull repair surgery is no exception. When is the most suitable time for skull repair? Cranial repair surgery should not be done too early or too late. For those patients with open skull crush fracture and no intracranial hypertension with good wound cleanliness, it is recommended to perform cranioplasty in one stage. In the case of patients with severe closed craniocerebral trauma, cranial defects caused by intracranial hypertension requiring decompression of the large bone flap need to be repaired cranially three months after surgery. The timing of cranial repair is important, and likewise the choice of cranial repair materials is critical. Nowadays, many local hospitals use titanium mesh material for skull repair, which is a material more advanced than the previous one, but it also has certain disadvantages and shortcomings, and there are many postoperative problems, which is not ideal. In comparison, the PEEK material currently used by our team has more advantages. This is a very advanced and mature material with excellent performance, effectively avoiding the defects and shortcomings of titanium mesh materials. Our team has also introduced the concept of cosmetic surgery into the procedure, making the post-operative results more natural and beautiful, which is highly praised by our patients.