The cranium is a very important group of bones in the human body, located above the spine. The cranium is made up of 23 flat and irregular bones of different shapes and sizes and is very precise and complex. At the same time the cranium plays a very important role in the human body, it constitutes a closed and stable cranial cavity environment, which supports and protects the intracranial tissues and organs of the head and face. However, in real life, skull defect is also a relatively common thing, many people because of such and such an accident and lead to skull defect, which ranges from 60 to 70 years old, down to teenage or even a few years old children, may face this kind of danger. For example, some people ask which is better to do skull repair bionic bone or peek at the age of 15? It is unfortunate for a 15 year old to have a cranial defect, and he has a long road ahead of him, so it is even more important to choose the cranial repair material with extra care, in order to achieve a better repair result and to prevent further dangerous accidents in the long years of his life. As for the bionic bone and PEEK material, in fact, whether for children, teenagers, or adults, middle-aged and elderly patients with cranial defects, PEEK material is a very ideal cranial bone repair material. PEEK material, scientifically known as polyether ether ketone, is a special polymer material, with very stable chemical properties and very excellent physical properties. It has good insulating and thermal insulation properties and is ray transmissible, all of which are advantages that make it ideal for placement in the human body. In addition, PEEK material is made through three-dimensional molding, 3D printing, can be highly restored to the anatomy of the skull, and is embedded repair, after repairing the skull surface smooth, will not produce any blunt cutting injury.PEEK also has a good histocompatibility, will not produce a rejection reaction. At present, polyether ether ketone PEEK material has become the latest trend in cranial bone repair materials.