Recently, a patient who has had cranial repair surgery for four years posted a post on the Internet: I recently found that the titanium mesh is exposed, and now it has abraded my skin, which is very painful, and I wonder if it is possible to undergo another surgery and not have such a situation again. Cranial defects are mostly caused by traumatic brain injury or craniotomy. In order to maintain the stability of intracranial pressure and the normal operation of human body functions, cranial defects with a diameter of more than 3 centimeters should undergo cranial bone repair surgery as soon as possible. Regarding the cranial bone repair material, the most used material is titanium mesh. However, in the clinic, it is found that many patients have different degrees of infections or complications after titanium mesh cranial repair surgery, such as postoperative wound pain, localized protrusion, titanium mesh depression, or even titanium mesh exposure, etc., which requires the patient to go to the hospital in time to conduct relevant examinations and deal with the wound, and if necessary, need to replace the repair material. Can cranial repair be redone? Yes, it is possible. This means that not only the old repair material must be removed, but also the new repair material must be placed in. In China, most hospitals remove the material and wait for a few months to recover before performing the second repair, but according to the relevant clinical reports, there are hospitals in China that can remove the titanium mesh and simultaneously place the new material peek material, which is not only reducing the patient’s pain, but also completing the surgery with high quality, which is a precedent both at home and abroad. It is a precedent at home and abroad. Cranial bone repair material peek material performance than titanium mesh is excellent, in high temperature sterilization, cleaning can also be repeatedly used, peek material is currently the more ideal repair material.