Bilateral posterior hip dislocation associated with right Pipkin II fracture: A case report.

BACKGROUND: Bilateral posterior hip dislocations are very rare injury, requiring a very hight trauma energy.

PRESENTATION OF THE CASE: We present a case of 40-year-old male who sustained bilateral posterior hip dislocation with associated right femoral head fracture Pipkin type II following a hight energy trauma without neurovascular deficit. A prompt closed reduction was made, it was successful in lift hip but incomplete in right one, therefore, an open reduction was indicated, performed through a modified Hardinge approach permitting internal osteosynthesis with two Herbert screws.

DISCUSSION: Posterior hip dislocations are an orthopaedic emergency that must be reduced within 6 h to avoid sciatic nerve compression and avascular necrosis (AVN). They are most often associated with femoral head fractures commonly known as Pipkin's fractures, that need anatomic reduction and osteosynthesis through posterior approaches, rarely external or anterior approaches.

RESULTS: Anatomic and functional results were good at two years follow up excepting a right hip non-bridging heterotopic ossification; the patient returned to his work normally without any functional sequelae.