For example, in neurosurgery, there are many patients with cranial defects caused by traffic accidents, or violent injuries, etc. This makes them very hurt and brings some impact on their life and work. Because for the human brain, the skull is like a shield, which strongly protects the brain from external damage, and when the skull is defective, the intracranial tissues are in direct contact with the outside world, the intracranial pressure becomes very unstable, and the intracranial life activities are thus disturbed, and a series of uncomfortable symptoms will appear in the patient’s body, and the consequences are more serious if not treated in time. For the problem of cranial defects, it is medically recommended that patients with a defective area of more than 3 cm in diameter and eligible for surgery should undergo cranial repair surgery in a timely manner, so as to reshape the complete closed cranial environment and avoid causing more damage to themselves. However, it has to be reminded that in cranial repair surgery, the good or bad repair material directly affects the surgical effect, so patients should choose carefully. As far as we can see, most hospitals use titanium mesh material, which is not expensive and has improved a lot compared to the previous materials, but it still has some problems, so it is not an ideal choice. In contrast, peek material is more advanced and effective, it is a safer polymer material, its hardness, insulation, elasticity and tissue compatibility are very good, it is a material that is particularly close to the autologous cranial bone. It may be said that peek material is a bit more expensive than titanium mesh material, but it is very significant advantage in terms of effect.