Conservative measures including physical therapy, home exercises as well as intra-articular corticosteroid injections to the left hip, were ineffective. This can substantially increase the risk of dislocation, impingement and instability after traditional hip replacement surgery. With the Reverse HRS THA system, the traditional “ball and socket” design is reversed compared to the native hip and traditional hip replacement. AP of the Pelvis, AP of the Left Hip, and a Frog Leg Lateral of the Left Hip demonstrating left hip osteoarthritis. AP pelvis, AP of the left hip, and lateral of the left hip demonstrating left reverse total hip arthroplasty without acute complication.