Cranial repair is a time-honored medical technique that has been practiced by our forefathers thousands of years ago, and after thousands of years of development and technological advancement and maturation, cranial repair is now one of the more common and routine procedures in neurosurgery. However, there are still some situations that are less than ideal. For example, most hospitals now use titanium mesh as the repair material for cranial bone repair, and this metal material inevitably has some problems. For example, the titanium mesh material is covered on top of the bone window, the metal edge may cause cutting headache to the scalp; in addition, titanium this material is not very good for the human tissue compatibility, which may cause rejection; there is also titanium mesh’s insulation performance is not good, after the operation may cause the patient to be sensitive to heat and cold, and so on. So, if there is a less successful situation, can cranial repair be redone? Yes, cranial repair can be redone, for example, if there is severe rejection and destruction of the scalp tissue, the titanium mesh can be surgically removed and the cranial repair can be redone with a better material in about three months. At present, the industry generally uses advanced polyether ether ketone PEEK material for cranial bone repair, which has excellent performance and is comparable to the basic performance of human skull, and the PEEK material is three-dimensionally molded and accurately embedded in the bone window, which well overcomes the above problems and achieves a very desirable repair effect.