Dislocation after THA for Femoral Neck Fracture

    The use of larger femoral head sizes has been credited with helping to reduce the dislocation rate following elective primary total hip arthroplasty (THA) in patients with osteoarthritis of the hip.

    Is the same true of patients who undergo THA for a femoral neck fracture?

    To find out, Scott Marston, MD, from the University of Minnesota in Minneapolis, and his colleagues retrospectively reviewed the records of 2 surgeons who had performed 111 primary THAs (107 patients) for femoral neck fracture between August 2004 and October 2013.

    The overall THA dislocation rate was 4.50%, which is lower than previously reported in the literature.

    Patients with larger femoral heads (>36 mm) were less likely to dislocate than patients with smaller femoral heads (<36 mm). However, Dr. Marston and his colleagues said the results were complicated by signficant differences in demographics between cohorts, including sex, age, and surgical approach.

    Click the image above to hear Dr. Marston’s comments on the study findings.


    Johnson J, Marston S, Horazdovsky R, Vang S. Primary total hip arthroplasty dislocation rates have decreased for femoral neck fracture patients. Presented at the 2nd Annual Pan Pacific Orthopaedic Congress, July 12-15, 2015, Kona, Hawaii.