Hip dislocation is a relatively rare entity and may be congenital or acquired.
Hip dislocations account for ~5% of all dislocations 3.
There are numerous patterns of dislocation 1:
- posterior hip dislocation (most common ~85%)
anterior hip dislocation (~10%)
- inferior (obturator) hip dislocation (rare)
- superior (pubic/iliac) hip dislocation
- central hip dislocation (protrusio) - always associated with acetabular fracture 2,3
Acquired hip dislocation is normally associated with high-speed trauma, with motor vehicle collisions account half of dislocation with other causes such as falls and sports injuries, less common 1.
Hip dislocation is the second most common complication of hip joint replacements and occurs in ~5% (range 0.5-10%) of patients with ~60% of dislocations being recurrent 5.
Congenital hip dislocation is now considered part of the spectrum of developmental dysplasia of the hip (see article for further information) 4.
- avascular necrosis: particularly if reduction postponed more than 24 hours
- 1. Stannard J, Schmidt A. Surgical Treatment of Orthopaedic Trauma. TNY. ISBN:B005WKJAGS. Read it at Google Books - Find it at Amazon
- 2. Soto JA, Lucey B. Emergency Radiology: The Requisites. Mosby. ISBN:0323054072. Read it at Google Books - Find it at Amazon
- 3. Dähnert W. Radiology Review Manual. Lippincott Williams & Wilkins. (2011) ISBN:1609139437. Read it at Google Books - Find it at Amazon
- 4. Sewell MD, Rosendahl K, Eastwood DM. Developmental dysplasia of the hip. BMJ. 2009;339 (nov24 2): b4454. doi:10.1136/bmj.b4454 - Pubmed citation
- 5. Blom AW, Rogers M, Taylor AH et-al. Dislocation following total hip replacement: the Avon Orthopaedic Centre experience. Ann R Coll Surg Engl. 2008;90 (8): 658-62. doi:10.1308/003588408X318156 - Free text at pubmed - Pubmed citation