| Summary: | Abstract Background To compare the efficacy of the operative techniques, complications, reduction quality and hip functional recovery by using the supra-ilioinguinal approach and the modified Stoppa approach for the management of acetabular fractures. Methods A consecutive cohort of 60 patients from September 2014 to October 2017 with displaced acetabular fractures involving the quadrilateral plate were treated operatively with supra-ilioinguinal approach (group A) and modified Stoppa approach (group B), respectively. There were 36 patients in group A and 24 patients in group B. The surgical details, complications, radiographic and clinical results were recorded. The quality of reduction was assessed by measuring the residual step and gap displacement of postoperative CT with a standardized digital method. Results The complications, reduction quality (gaps and steps) and hip function recovery had no significant statistical difference in approaches. The mean operative time was shorter and the mean intraoperative haemorrhage was less in group A. There were statistical differences in the operative time (P = 0.025) and intraoperative haemorrhage (P = 0.003) between the supra-ilioinguinal approach and the modified Stoppa approach. Conclusion Compared to the modified Stoppa approach, the supra-ilioinguinal approach provides a closer visualization to the quadrilateral plate, the operative time was shorter and the intraoperative haemorrhage was clearly less. It is at least equal to or could be a better choice to deal with complicated acetabular fractures especially involving the quadrilateral plate and the anterior one third of the iliac bone.
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