Cranial repair is significant, as the repair not only accelerates venous return but also increases the cerebrospinal fluid circulation rate by a factor of 1. Postoperatively, the adhesions between the dura mater and the edges of the flap and the bone window can be loosened, and the strain, distortion and compression of the blood vessels on the surface of the brain tissue can be released. This improves the hemodynamics of local brain tissue and promotes the recovery of neurological function. In addition, the direct compression of the cranial cavity by the scar between the dura mater and the flap and the cerebral cortex is released. The longer the decompression time of the debridement flap and the larger the bone window, the more obvious the above compression symptoms are before repair. The operation time of cranial repair usually takes 1-2 hours, and the choice of material is also important during the postoperative temporalis muscle atrophy is subluxation patients after doing the operation. What would be the reason if the temporalis is still sunken after cranial bone repair? The main reasons for temporal depression after cranial defect repair are as follows: 1. postoperative temporal muscle atrophy; 2. decompression under the temporal muscle during surgery, which is not taken into account during the second surgical repair; 3. local direct external blow; 4. prolonged lying on the affected side while sleeping, resulting in long-term deformation of the repair material; 5. long-term pulling of the temporal muscle resulting in local change; 6. factors of the repair material; the right hospital should be chosen when performing cranial bone repair. Hospital, followed by the right material, professional doctors will give to make their own surgery zero error, good materials will make their own lifelong worry-free, generally recommended to go to a relatively large hospital for surgery.