Nowadays, accidents are becoming more and more frequent, and cranial defects are becoming more and more common. Once skull defect affects not only the beauty, but also threatens the health. Cranial defect should not be careless, the more direct way is to go to the hospital to do cranial repair surgery to restore the integrity of the skull as soon as possible to avoid greater harm. How many levels of surgery is cranioplasty? Cranioplasty is actually the installation of artificial material or autologous bone material into the skull defect area after it is fully exposed, and the surgery is basically completed after it is fixed. Some patients may worry about the safety of skull repair surgery, but don’t worry, skull repair surgery has been available since very early, it is a relatively routine surgery in neurosurgery, the surgery is not very complicated and not very difficult, not too big surgery. However, skull repair requires special attention to the choice of materials and also requires excellent skills. Titanium mesh is the most widely used material in clinical practice, but there are certain problems and complications associated with this material. For example, there is a risk of rejection after surgery, infection, sensitivity to heat and cold, and the risk of material exposure. As you can see, the titanium mesh material is not so ideal. Currently our team uses a new type of polymer material – polyether ether ketone PEEK material, which has achieved very good results. It is reported that PEEK material is comparable to autologous cranial bone in terms of thermal insulation, stiffness, elasticity and stability, and the postoperative results are more desirable.