Can I fly with an unrepaired skull? Craniocerebral trauma and brain surgery to remove bone flaps, and removal of tumors within the skull can cause defects in the skull. Cranial bone repair is very necessary, the defective area will make the brain tissue can not be effectively protected, resulting in the obstacle of blood supply, abnormal circulation of cerebrospinal fluid, etc., causing the patient’s headache, dizziness, fear of vibration and other syndromes, and often will also make the patient have a serious thought burden, to the outside world of people or things to produce inferiority complex, resistance to the mentality. Undone cranial bone repair is allowed to fly, as long as the normal blood pressure is ensured on the airplane, there is generally no risk. However, if the diameter of the skull defect is more than 3 centimeters, it is necessary to go to the cranial bone repair surgery within the time recommended by the doctor, the effect of the cranial bone repair surgery has a great relationship with the material of the repair, in the long-term historical development, the continuous progress of medical science has made the material of the repair is also tending to perfection, the earliest material of the repair has easy to deteriorate, the strength of the material is not very strong, not easy to molding, poor compatibility, easy to be infected and other disadvantages, and now has been developed into a strong, strong, easy to infect. Nowadays, it has been developed into a repair material with the advantages of high strength, easy to shape, long service time, high biocompatibility, etc., and it has been applied to clinical practice, which brings a good news to the patients with cranial bone defects. This ideal cranial repair material is a new type of polyether ether ketone material, also commonly known as peek material, currently in use, many patients with cranial defects and regained a complete head, the heart also re-confidence, peek material so that every cranial defect patients back to a normal life trajectory.