Mechanism of injury was considered as a kind of secondary trauma of inversion or internal rotation force with hip joint was flexed position state. Three cases of posterior hip dislocation with femoral head and neck fracture(Pipkin type III)have been experienced and follow up still now at Soon Chun Hyang University hospital. The results were evaluated by Thomson Epsteins clinicoradiologic criteria and Harris hip score and follow up radiologic findings.

As a results of this study, we are more prefer primary open reduction and rigid internal fixation than primary joint replacement arthroplasty due to be occured in young age group. And futher evaluation should be needed.