Causes and purposes of cranial repair Cranial repair is a common brain surgery procedure to repair the skull in response to a traumatic brain injury that has resulted in a cranial defect. Reasons for cranial bone repair: Craniocerebral trauma and brain surgery (mainly acute aneurysm, cerebral hemorrhage, etc.) to remove bone flaps. Due to the change in shape of the defective area of the skull, the scalp is affected by atmospheric pressure, which causes it to sink in and compress the brain tissue. Often, the bone window is fuller in the morning, and the bone window is more depressed after walking or at night. Patients with cranial defects often have a heavy sense of insecurity and other ideological burdens, and can cause headaches, dizziness, fear of vibration and other syndromes. The longer the cranial defect, the higher the incidence of cranial defect syndrome and secondary brain damage. In order to restore the airtightness of the cranial cavity, keep the physiological intracranial pressure stable and reduce the cranial defect syndrome. Cranial bone repair should be performed in all cases where the diameter of the cranial defect is more than 3 centimeters, without muscle coverage and without contraindications. To solve the problems of lack of effective protection of brain tissue in the defect area, impaired blood supply, abnormal cerebrospinal fluid circulation, etc., it is also necessary to solve the problem of shape repair and plastic surgery. The timing of the operation is generally considered to be appropriate for repair 3-6 months after craniotomy, the pressure in the defect area is not high, and there are no factors unfavorable to the healing of the incision, such as infection and ulceration. Wumi inter-bone repair methods and materials mainly include three kinds: 1, titanium ton: for the more flat small defects, two-dimensional titanium plate fixation can be used. Iron plate, the patient only need to receive a CT examination, complete dimensional integrative social plate is a better choice. Currently 98 patients in my department using three-dimensional plasticity will complete the analog assembly, the design of the data using digital molding of this digital design, Cc data of three-dimensional reconstruction, and then in the computer restoration system for titanium alloy restorations, the body, compared to the model of titanium alloy shear edges can be obtained to repair technology to produce restorations model, and then the use of digital fabrication technology special restoration body. As the digital restorations data directly from the patient, eliminating the drawbacks of traditional hand-made, greatly reducing the patient’s pain and manufacturing is a new technology, in all aspects of the more perfect, 2, look at the defective patients, restorations of cellular differential columns he will be a big impact on aesthetics. And digital restorations and broken therapy risk is also greatly greatly reduced, the patient postoperative recovery to Mingfu short, “can be faster technical real work, integration into society. As a result of the local push and collision caused by 2) Plexiglas or silicone plate: Plexiglas or silicone plate is irritating, will age over time, hardness is insufficient, rarely used. 3, autologous cranial flap: any reason for craniotomy, after cutting the cranial flap, can not be immediately replanted in situ, can be buried by the autologous subcutaneous preservation of retention. Need to operate in the abdomen, leaving scars, although the autologous cranial group of fewer complications, the repair of the appearance of satisfaction, but need to operate again and increase the patient’s pain, and the existence of cranial bone resorption becomes small or even necrosis and repair after the loosening of the fixation of the shortcomings of instability. At present, only very few hospitals perform this type of surgery. Preoperative preparation for cranial bone repair All patients had no contraindications to surgery, and all underwent cranial CT and frontal bone X-ray filming. The digital forming group routinely performs thin-layer CT scanning, with a layer thickness of 2mm, and 3D reconstruction of the frontal bone, and then uses a titanium mesh digital forming machine to form and process the titanium mesh, creating a personalized titanium mesh restoration that is exactly the same as the patient’s frontal bone defect, and then sterilizes it for spare time; the time required is about 3 working days. Surgical method of cranial bone repair All the patients were put under general anesthesia with tracheal intubation, and the overlay method was used for the repair. All patients were fixed with matching self-tapping titanium nails; antibiotics were routinely applied to prevent infection, and the drainage tube was removed in 1~2 days, and the stitches were removed in 10~12 days. Criteria for judging the efficacy of cranial bone repair Short-term observation of wound healing, plastic effect and complication after operation, and final evaluation of efficacy according to the following criteria in the follow-up after 3 months. (1) Excellent: reliable fixation of titanium alloy mesh plate, beautiful appearance, no postoperative complications; (2) Good: reliable fixation of titanium alloy mesh plate, postoperative complications improved after symptomatic treatment; (3) Poor: titanium alloy mesh plate slipped out of place, or the titanium alloy mesh plate was removed due to other surgical complications.