Purpose: Percutaneous retrograde fixation of posterior column acetabular fractures is becoming a commonly practiced technique. Prone positioning provides reliably reproducible intraoperative fluoroscopic images necessary for precise preparation of the osseous fixation corridor necessary for accurate and safe implant placement. Additionally, the prone position facilitates an open posterior approach if an open reduction is necessary. The purpose of this study was to analyze the radiographic and clinical outcomes of retrograde posterior column fixation utilizing the prone position.
Methods: From 2017 to 2020, 41 patients were included in the retrospective study. Clinical outcomes were collected for a minimum of 6 months. Implant placement was assessed on post-operative pelvic computed tomography (CT) scans and fracture union was assessed on routine follow-up radiographs.
Results: All (100%) cases achieved union by 4 months, with an average time to union of 3.2 months. Every post-operative CT scan demonstrated screw placement contained throughout the posterior column with no intrusion into the hip joint or sciatic notch. Clinically, one patient reported pain with sitting. No patients required additional surgical intervention.
Conclusion: Prone positioning is a versatile and effective approach for retrograde percutaneous fixation of posterior column acetabular fractures. This study is the first to report clinical outcomes utilizing this technique and contributes to a growing body of the literature supporting the value and safety of percutaneous fixation of acetabular fractures appropriate for this fixation strategy.
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