Clinical and radiological risk factors of autograft cranioplasty resorption after decompressive craniectomy for traumatic brain injury.

•The repositioning of an autologous bone flap after decompressive craniectomy is the first line treatment for cranial reconstruction.•Aseptic autologous bone flap resorption (BFR) is the most frequent complication.•We retrospective analyzed potential risk factors for aseptic bone flap resorption after autologous cranioplasty due to decompressive craniectomy in patients with TBI.•Younger age, fragmented autologous bone flap and a wide gap between CP and cranial defect at CT scan study were predictive of bone flap resorption.