There are many accidents in life which often happen without any notice. According to a survey, many people suffer from cranial defects due to an accident or a natural or man-made disaster, thus giving a heavy blow to their health. Cranial defects are important, if not repaired as soon as possible, will not only have a great impact on a person’s outward appearance, and brain tissue due to the loss of the normal cranial barrier protection is vulnerable to secondary injury, but also may lead to other complications. Therefore, when we have the problem of cranial defects, we have to restore the integrity of our skull through cranial repair surgery. How to calculate the size of cranial defect area? It is understood that for the indications and timing of cranial bone repair, the neurosurgical guidelines stipulate that when the patient’s defect area is larger than 3 centimeters or more, and there are no contraindications, it can be repaired 2-3 months after the debridement flap surgery. Some patients can also depend on their actual situation. Currently, titanium mesh cranial bone repair is common in clinical practice, but because the implanted material is titanium metal, it takes a covering type of repair, which increases the chances of postoperative rejection and infection and the exposure of the material, and makes the repair effect less desirable. Currently, the peek cranioplasty can help patients realize the dual goals of basic repair and plastic surgery. This surgery is an advanced and mature repair technique after researching and summarizing hundreds of cases of pathology and realizing 4 technological innovations with rich experience and good results. Warm reminder: the above is the detailed introduction of how to calculate the area of cranial defects, I hope it will be helpful to you, and recommend that patients go to regular hospitals as soon as possible to take the appropriate treatment, active treatment, and restore health as soon as possible.