When it comes to craniotomy, people have a worried face, but things change and when suffering from some cranial disease or cranial trauma, sometimes they have to be treated and controlled by craniotomy. When craniotomy is performed, it is usually done by opening a window in the skull, and in some cases, the bone flap cannot be returned immediately and the skull defect may be left behind. Cranial defect is also not a minor problem, because the skull is an important organ to protect the brain, and once it occurs, the intracranial tissues are only separated by a layer of scalp under atmospheric pressure, which may affect the normal operation of all life activities, and various physical discomfort symptoms may occur. The skull defect will cause the appearance to become very unattractive, and the patient will have low self-esteem and become depressed and pessimistic in the long run. What should I do after the cranial bone is removed by craniotomy? Cranial defect is to be repaired, and it is recommended that patients should go to a professional hospital for cranial repair surgery 2-3 months after surgery, so as to restore the integrity of the skull, reshape the closed cranial cavity environment and reduce the occurrence of cranial defect syndrome. Moreover, in neurosurgery, skull repair surgery is not too big, and the safety is still very high, so patients do not need to worry too much. However, it is necessary to choose good repair materials and to operate by experienced and senior experts in order to improve the success rate of the operation. At present, many hospitals use titanium mesh material for skull repair, but there are more problems with titanium mesh material, and various complications will occur after surgery, and there is a risk of material exposure.