Correlation of stability and complications measurements in traumatic hip dislocation cases associated with posterior wall acetabular fracture

Abstract

Aim: To evaluate the relationship between stability criteria and complications in traumatic hip dislocations associatedwith posterior acetabular wall fracture.Material and Methods: The study retrospectively investigated 18 patients treated for posterior acetabulum fracture dislocation in the orthopedics and traumatology clinicfrom 2014-2017. All patients had wall defect, acetabular fracture index and coronal posterior acetabular arc angle (PAAA)assessed. Fracture types were determined according to Letournel’s definitions.Results: Preoperative radiological tests found the mean width of intact hip wall was 33.8 mm (range 31-39 mm), mean wall length in fracture hips was 13.7 mm (range 5-21 mm), and mean wall defect was measured as 59.1% (range 37.5-86%). When intact hips were assessed mean coronal PAAA was 54.2 degrees (range 41-65). For fractured hips, coronal PAAA was 18.2 degrees mean (range 6-29). Acetabular fracture index (AFI) was determined as mean 40.8 (range 14-62.5). Regarding complications in the postoperative period, one patient had avascular necrosis of the femoral head and 9 patients had osteoarthritis.Conclusion: Though Defect percentage, AFI and coronal PAAA values are important proven markers for stability, in our study there was no correlation identified with complications.