Material and Method: Thirty-five cases of posterior dislocation after total hip replacement were retrospectively studied by medical records and radiographic evaluation. The study included leg position after hip dislocation, leg length, and leg abduction/adduction angles.

Results: External rotation of the patient’s leg was found in 13 cases (37.1%), neutral position in six cases (17.2%), and internal rotation in 16 cases (45.7%). Measurements of the femoral shaft-vertical axis angle found adduction in 17 cases (average 17.4 degrees, range 1-25 degrees), abduction in 15 cases (average 6 degrees, range 1-15 degrees), and 0 degrees in three cases. Average leg shortening was 3.55 cm (range 0.6-13.5 cm).

Conclusion: The present study shows that patients with hip dislocation after hip replacement can manifest many signs of limb deformity in rotation (internal, external, and neutral) and abduction/adduction positions.

Keywords: Total hip replacement, Dislocation, Clinical manifestation, Leg position