Preoperative 3D printing planning technology combined with orthopedic surgical robot-assisted minimally invasive screw fixation for the treatment of pelvic fractures: a retrospective study.

Objective: To explore the advantages and effectiveness of preoperative 3D printing planning technology combined with orthopedic surgical robot-assisted screw placement in the minimally invasive treatment of pelvic fractures compared to orthopedic surgical robot-assisted screw placement alone.

Methods: A retrospective analysis of the clinical data of 29 patients with unstable pelvic fractures treated with orthopedic surgical robot-assisted percutaneous screw fixation from July 2021 to August 2023 was conducted. Among them, 13 patients who underwent preoperative 3D printing technology for screw planning were assigned to the experimental group, and the remaining 16 patients were assigned to the control group.

[Efficacies of percutaneous multiple needle puncturing for releasing hip adductor muscle during total hip arthroplasty].

Objective: To summarize our experiences of applying percutaneous multiple needle puncturing technique for releasing adductor muscle during total hip arthroplasty (THA) for ischemic necrosis of femoral head and provide rationales for clinical practice.

Methods: From January 2008 to December 2012, 36 adult patients with ischemic necrosis of femoral head (36 hips) and 36 adult patients with femoral neck fracture (36 hips) were recruited. The group of ischemic necrosis of femoral head was designated as experiment group in which there were 29 males and 7 females with an average age of 67.