Accident is uncontrollable, in the clinic because of accidents and lead to cranial defect patients are very much, cranial defect brain lost protection, and the scalp in the outside world by the influence of atmospheric pressure is very easy to appear inward subsidence, which will compress the brain tissue, to the patient’s body to bring a lot of damage. Cranial defect will make the patient headache and dizziness discomfort symptoms, the patient will be afraid of vibration, the thought is very stressful, very insecure, the longer the cranial defect, the occurrence of cranial defect syndrome and secondary brain injury chances are greater. Therefore, the problem of cranial defects should not be taken lightly. It is almost impossible for the defect to grow back on its own, and if another accident occurs, the consequences will be even more serious. Generally speaking, it is recommended that patients with skull defects of more than 3cm in diameter, without muscle coverage and without contraindications should undergo cranial repair surgery in a timely manner, so as to better restore the seal of the cranial cavity, maintain stable intracranial pressure, and alleviate the patient’s physical discomfort. However, in cranial repair surgery, the choice of repair material is also crucial, good materials can improve the success rate of the operation and reduce the pain of patients. Nowadays, many local hospitals still mainly use titanium mesh material, but after a large number of clinical practice verification shows that the titanium mesh material still has certain shortcomings and deficiencies, the more serious of which is that the material will be exposed. What should I do if the titanium plate is exposed in cranial repair? When the material is exposed, it can be repaired twice, and it is recommended to choose a better material for the repair.