The earlier the cranial repair is done, the better, but it usually needs to be done within three months after the first surgery, three months after the first surgery, the earlier if the repair surgery is done, the better, and if it is now more than three months, it is recommended to go to the hospital as soon as possible for the cranial repair surgery. In life, due to traffic accidents, falls, violent injuries, sudden natural disasters, surgical operations and so on, many people may cause defects in the skull, which requires timely cranial repair. Otherwise, there may be more serious adverse symptoms, such as unstable intracranial pressure, intracranial life activities may be interfered with, which may be manifested as headache, dizziness, in addition to the patient’s fear of pulsation, bulging, collapse of the defect area, and some patients show depression, fatigue, reticence, and low self-esteem. Therefore, timely cranial repair is very necessary, so when is the best time for cranial repair? For patients with open comminuted skull fracture and no cranial hypertension, it is recommended to perform one-stage cranioplasty; for patients with severe closed craniocerebral trauma and huge skull defect caused by cranial hypertension, it is generally recommended to perform cranial bone repair in about 3 months. Of course, in addition to the repair time, the cranial bone repair material is also very important. At present, the better cranial bone repair material belongs to polyether ether ketone material, which is also commonly known as PEEK material, is a very advanced cranial bone repair material. This material is based on the patient’s skull data for three-dimensional customization, 3D printing, can completely restore the anatomical structure of the skull, in addition, this PEEK material is bionic bone, very good tissue compatibility, and in the elasticity, heat conduction, hardness, stability and other aspects of the performance of the autologous skull are comparable to the restoration of the effect is very ideal.