The skull is an important barrier to protect the brain, and also an important support to maintain the health of the whole body. However, there are many dangers lurking everywhere in real life, such as many accidental injuries, traffic accident injuries, production accident injuries, falling objects, fights and so on, which may cause injuries to the skull and damage to the skull and may lead to cranial defects. Of course, there are also some spontaneous craniosynostosis, such as brain tumor, cerebral hemorrhage, cerebral infarction, etc., which require craniotomy, and a significant proportion of these can also leave cranial defects after surgery. Patients with craniosynostosis can sometimes be combined with hypertonia, which is mostly due to a certain degree of brain tissue damage or impact, central nerve damage and abnormal peripheral nerve signals, resulting in hypertonia and limb muscle spasm, some of which are reversible and some may not. Some patients with cranial defects combined with hypertonia ask if replacing the cranial bone can help restore hypertonia, there may not be a very clear answer to this question, it should be said that it may help, but not exactly. Patients with cranial defects are generally recommended to undergo cranial repair surgery in a timely manner. Through successful PEEK cranial repair surgery, not only can the appearance of the intact skull be restored, the closed and intact cranial cavity can be restored, the intracranial environment can be stabilized and normalized, local blood flow can be improved, cerebrospinal fluid circulation can be improved, and so on, to provide a basis for the normal operation and recovery of various neurological functions, which to a certain extent may These may help the recovery and improvement of hypertonia to some extent, but the effect is not clear. If the problem of hypertonia is not improved after cranial repair, it is recommended to perform peripheral nerve narrowing, which can effectively improve hypertonia with definite effect and generally good prognosis.