Triple cranial defects are a not uncommon affliction. In the long course of life, we often have to face various kinds of risks. There are many uncertainties in the outside world that can bring us misfortunes, such as car accidents, falls from heights, workplace accidents, cranio-cerebral surgeries, and so on, 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 children, may suffer from this misfortune and suffer from cranial defects for various reasons. For example, some time ago someone asked about cranial repair for a three-week-old boy. Pediatric cranial repair is indeed something that should be taken care of, and it is generally advocated to hold off on cranial repair for children under the age of three. Cranial repair surgery generally needs to be performed after the age of three, as this is when the child’s skull is largely formed and growth is slower. A three-week-old boy is ready for this repair surgery, and it should be done as soon as possible, as prolonged cranial defects may also produce some adverse reactions that can affect the normal functioning and growth and development of the brain. However, if this three-week-old boy is to have his skull repaired, he should choose a professional hospital, a good and experienced doctor, in addition, he should use high-quality repair materials, so as to achieve better repair results. The consequences of using bad repair materials can be very serious. For example, many hospitals use titanium mesh, this material is not good, sometimes there are infections, rejection, scalp injury, pain and other adverse reactions, and even create scalp wear, titanium mesh exposed. At present, the most 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 latest trend in cranial bone repair materials.