Cranial bone repair surgery needs to choose a regular authoritative hospital for surgery, postoperative temporalis muscle atrophy is the cause of subsidence, so the choice of surgical materials is also very important. Cranial bone repair surgery is significant, after the repair surgery not only makes the venous return faster, but also increases the cerebrospinal fluid circulation speed by one times. After the operation, the adhesion between the dura mater and the edge of the skin flap and bone window can be loosened, and its pulling, twisting and compression of blood vessels on the surface of the brain tissue can be relieved. 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 skin flap and cerebral cortex is relieved. The longer the decompression time of the debridement flap, the larger the bone window, the more obvious the above compression symptoms before repair. What could be the cause if the cranial defect is still depressed after the cranial repair? The main reasons for temporal depression after cranial defects repair surgery are as follows: 1, postoperative temporal muscle atrophy; 2, decompression of the temporal muscle during the surgery, the second surgery repair failed to take into account; 3, local direct external force blows 4, sleeping on the affected side of the lying position for too long, resulting in long-term deformation of the repair material, 5, the temporal muscle for a long time, resulting in the distortion of the local change of the temporal muscle long-term pulling factors in the repair material in the cranial bone repair surgery, we need to choose the right hospital, and then also choose the right material. Secondly, you have to choose the right material, professional doctors will give their own surgery with zero error, good material will make their lifelong worry-free, generally recommended to go to a larger hospital for surgery.