The material, cranial defect repair, can be a little bit of everything. Initially, some people put the removed bone flap under the skin of the belly, put a few months of time and then take it out. But at this time found that this edge are more rounded, more desiccated, the size may not be too suitable, of course, this method is still there. There is a later is to use plexiglass, but its thermal conductivity is very strong, summer in the sun when exposed to the sun, are feeling particularly hot, this is also gradually eliminated. Then later is to use the titanium plate, titanium alloy, the texture is relatively tough, but it also has a problem, that is, the edge of the time if it is not done well, the mold, sometimes it will cause warping, the edge of the warping, exposed, infected. Now a new material is PEEK, PEEK is a relatively new biosynthetic material, its adaptability, there is compliance, are better.