Cranial repair is a relatively old procedure that has been developed over thousands of years of human history. Over time, cranial repair has become a well-established routine procedure in neurosurgery. Of course, as the technology continues to evolve, so do the materials used in cranial repair, which are more advanced and better adapted to the human cranial environment. Early medical workers used to use cranial bone repair materials such as calcium phosphate bone cement, plexiglass, silica gel, hydroxyapatite and so on, but the effect of these materials are not ideal, because of various problems and no longer used. At present, the more widely used cranial bone repair material is titanium mesh material. Some patients ask if titanium mesh for skull repair will fall off. When titanium mesh is used for cranial repair, the mesh is placed over the bone window and fixed with titanium staples, which is generally unlikely to fall off. However, although titanium mesh is an advanced material compared to more traditional materials, it has many drawbacks and shortcomings. For example, titanium mesh material hardness is not enough, there may be deformation by external forces; titanium mesh metal material insulation is not good, the patient will be very sensitive to the external hot and cold environment after the operation, resulting in a lot of discomfort; titanium mesh covering the edge of the repair may be abrasive to the scalp; after the operation may also occur in the rejection of infections, and even lead to scalp breakage, the material is exposed, and so on. Therefore, the use of titanium mesh for skull repair is not recommended at present.