Craniosynostosis has become a relatively common cranial disorder in the current social environment. Not only adults, but also many small children, teenagers and young adults may suffer from skull defects for one reason or another. For example, injuries sustained by children playing with each other without paying attention, or being involved in a traffic accident, can end up causing a skull defect. One parent just asked how long it takes to repair the skull of a thirteen year old child. For this question, it depends on what time is being asked. Let’s start with the timing of cranial repair, which means how soon after the defect the cranial repair should be performed. If it is an open cranial defect with a relatively clean wound, then cranial repair surgery can be performed in one stage, while if it is a closed craniocerebral trauma or cerebral hemorrhage, and a larger cranial defect caused by debridement and decompression due to high intracranial pressure, then the repair surgery should be performed after 2-3 months. Then again, the duration of the repair surgery is relatively fast, and the operation usually takes only 2-3 hours. And the whole treatment cycle of cranial repair, about half a month, preoperative examination and evaluation, collection of cranial data, material customization will take about three or four days, and then the operation, after the operation, it takes about ten days to recover from the treatment, so the overall hospitalization cycle is about two weeks. And in addition to the timing, one other issue that patients or parents should pay special attention to is the choice of repair material. The ideal material for cranial bone repair is polyether ether ketone (PEEK), especially for small children in their teens or early teens, who should choose high-quality materials, which have excellent properties and can be adapted to children’s cranial bone growth, and can achieve ideal results.