AIM:To discuss four different materials that are frequently used in cranioplasty, and to reveal their advantages and disadvantages. MATERIAL and METHODS:We retrospectively reviewed 85 of our cranioplasty surgeries between 2016 and 2019. Reconstruction surgeries were excluded from our study due to craniofacial trauma. RESULTS:Of the materials used in cranioplasty, 33 are autologous bone, 32 are methyl-methacrylate, 12 are porous polyethylene, and 8 are titanium mesh. Complications developed in 16 patients. Of these, 10 are infection, 3 are flap collapse, 2 are wound healing disorders, and 1 is reactive effusion complications due to the used material. The highest complication rate was 21.9% in cranioplasty with methyl-methacrylate. No major complications were observed in cranioplasty with titanium mesh. CONCLUSION:Cranioplasty, which are among the surgeries with high complications in neurosurgery, maintain their importance today. As technology is developed and cost problems are resolved, cranioplasty takes its place among the safer and standard neurosurgical operations.

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Introduction:Ventriculoperitoneal shunt surgery is one of the most commonly used methods in patients with hydrocephalus. This study aims to reveal the causes of complications and revision after shunt surgery and discuss measures that can be taken against these situations. Methods: We retrospectively reviewed the shunt revisions of 248 pediatric age groups who underwent ventriculoperitoneal shunt surgery due to hydrocephalus between 2000 and 2016.Results: Of the 248 patients, 127 (51.2%) were female and 121 (48.8%) were male. The mean age was 12 months. The most common etiologic cause was congenital hydrocephalus. 71 of 248 patients (28.6%) underwent revision surgery. More than one revision surgery was performed in 23 (% 32.4) of 71 patients who underwent revision surgery. Infection (21.7%) and ventricular catheter occlusion (17.1%) were the most frequent causes of revision surgery. Conclusion:The rate of revision surgery due to ventriculoperitoneal shunt surgery in pediatric patients is still high despite the development of diagnosis and treatment methods and many researches about it. Investigating preventable causes of revision surgeons may help to reduce high revision rates.