Contributor:  Jared Scott, MD Educational Pearls: While it is rare to have a native hip dislocation, it is relatively common to dislocate a prosthetic hip The mechanism for dislocation is usually adduction, flexion, and internal rotation the hip which can occur when walking Arthroplasty in the setting of trauma or fracture, posterior approach during surgery, and using a small femoral head increase the likelihood of later dislocation If a patient with a total hip arthroplasty says they were walking and then developed hip pain, do not discount a potential dislocation References Zahar A, Rastogi A, Kendoff D. Dislocation after total hip arthroplasty. Curr Rev Musculoskelet Med. 2013;6(4):350-356. doi:10.1007/s12178-013-9187-6 Summarized by John Spartz, MS3 | Edited by Erik Verzemnieks, MD