Li J, Ji Q, Ni M, et al. - This study was sought to assess whether and how intraoperative acetabular fracture (IAF) is a rare complication of primary total hip arthroplasty (THA). Researchers recruited a total of 4,888 primary THA between 2015 to 2018. The records in the total joint registry database were retrospectively examined and observed that 24 patients (24 hips) had sustained intraoperative acetabular fractures. This study's findings demonstrate that intraoperative acetabular fractures are rare complications of THA, and most commonly occur during the implantation of the acetabular components. It is very important to prevent the occurrence of fractures as much as possible even whether the fractures are reported during the operation. During THA surgery, it should be found that individuals with ankylosing spondylitis including hip joints must be careful to prevent IAFs during dislocation and pre-osteotomy.