With several content modifications and a steady increase in the number of participating hospitals, the group has been active until now and has been converted into the German Pelvic Trauma Registry. This group started with documentation and reporting of pelvic fractures in 1991 based on the data from university and major trauma hospitals. The study design was a retrospective analysis of data collected prospectively from the German Multicenter Pelvic Study Group. Using data from a large registry, we aimed to (1) describe the proportion of patients who develop nerve injuries after acetabular fracture (2) which fracture type(s) are associated with increased nerve injury risk (3) which surgical approach was associated with the highest proportion of patients developing nerve injuries and to assess (4) hospital volume–nerve-injury relationship and (5) the internal validity of the data. The need for evidence across hospitals brought us to perform the following study. To our knowledge, only small case studies have been published exploring the association of peripheral nerve damage and acetabulum fractures and the evidence from large cohorts is lacking. Also, late nerve injuries may result from a hematoma, capsular or muscular scarring, and heterotopic ossifications. These nerve injuries associated with acetabular fractures can be subdivided into traumatic and iatrogenic with complications arising from traction, retractor placement, instrumentation, or implant position. Common nerve injuries associated with acetabular fractures involve the obturator, femoral, and lateral femoral cutaneous nerves on the anterior and the sciatic nerve on the posterior aspect of the hip. Acetabular fractures frequently are associated with nerve injuries that arise from the lumbar plexus, including the sciatic nerve and its component branches.
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