Fig. 2

Case of a 48-year-old female femoral neck fracture (FNF) patient with underlying moderate-grade Intellectual disability. (A, E) The patient was diagnosed with Garden type 4 FNF, and the bone quality was poor due to general medical conditions. (B, F) In Immediate postoperative x-rays, the position of the bolt was not central, and posterior angulation of the femoral head was noted. We inserted an additional screw to maintain the reduction status and to compensate for the rotation instability. (C, G) Fixation failure occurred 1.5 months after the operation. The bolt slid laterally to a maximum degree (20 mm), and the additional screw was also pulled out. (D) We performed hemiarthroplasty after implant removal at 1.6 months after the initial surgery