Cranial defects are a not uncommon affliction. In the course of our lives, we are often exposed to a variety of risks. There are many uncertainties in the world that can bring us misfortunes, such as car accidents, falls from heights, workplace accidents, craniosurgery, etc., which can lead to cranial defects. Cranial defects are unfortunate enough, but even more unfortunate is the fact that they occur at the very beginning of life. Some children, even very young toddlers, may experience this misfortune and suffer from skull defects for a variety of reasons. Care should indeed be taken with pediatric cranial prosthetics. Children under the age of three are generally advocated to hold off on cranial repair. Cranial repair surgery generally needs to be performed after the age of three, as this is when the child’s cranium is largely formed and growth is slower. Boys who are three years old are ready for this repair surgery, and it should be done as soon as possible, because prolonged cranial defects may also produce some adverse reactions, affecting the normal function of the brain and growth and development. Of course, cranial bone repair surgery also needs to choose professional hospitals, experienced and good doctors, in addition to the use of high-quality repair materials, so as to achieve better repair results. At present, the ideal cranial bone repair material is polyether ether ketone. Polyether ether ketone, commonly known as PEEK material, is a special polymer material, its various properties are comparable to the autologous skull, implanted with no adverse reactions, has become the new trend of cranial bone repair materials.