The human skull is very hard and can withstand most of the external impacts, but there are still some irresistible factors that can cause damage to the skull, such as traffic accidents, cranial surgery and so on may cause skull defects. Cranial defects require prompt cranial repair surgery, which is usually performed within 3 months of the injury. Cranial repair surgery is a routine procedure in neurosurgery, and the technology is relatively mature. Some patients ask how long cranial repair surgery takes. This depends on the patient’s physical ability and the specific situation during the operation, because the operation involves scalp tissue, blood vessels, nerves, etc., and requires extra care, and there may also be some situations that require the operator to deal with on the spot, such as lowering the cranial pressure, changing the position, etc. The operation usually takes 2-4 hours. The surgery usually takes about 2-4 hours. Another important point is to choose the best material for cranial repair. Currently, we use a very advanced polyether ether ketone material, also known as PEEK, for cranial bone repair surgery, which has achieved very good clinical results. This material is biocompatible, capable of complex molding, excellent mechanical properties, good protective properties, high postoperative comfort, and is gradually becoming the latest trend in cranial bone repair materials.