Posterior hip dislocation
Posterior hip dislocations account for approximately 90% of dislocations at this joint. The classic mechanism is a flexed knee striking the dashboard during a motor vehicle collision. Note that the right knee is flexed, the leg is ADDucted at the hip and INTERNALLY rotated. The entire right leg is also shortened. The hip must be reduced quickly as the dislocation can compromise femoral head blood supply leading to avascular necrosis. A useful mnemonic to remember rotation with hip dislocations in PIN AXE (posterior - internal, anterior external). Anterior dislocations rotate externally. 

Posterior hip dislocation

Posterior hip dislocations account for approximately 90% of dislocations at this joint. The classic mechanism is a flexed knee striking the dashboard during a motor vehicle collision. Note that the right knee is flexed, the leg is ADDucted at the hip and INTERNALLY rotated. The entire right leg is also shortened. The hip must be reduced quickly as the dislocation can compromise femoral head blood supply leading to avascular necrosis. A useful mnemonic to remember rotation with hip dislocations in PIN AXE (posterior - internal, anterior external). Anterior dislocations rotate externally. 

Posterior hip dislocation
Posterior hip dislocations account for approximately 90% of dislocations at this joint. The classic mechanism is a flexed knee striking the dashboard during a motor vehicle collision. Note that the right knee is flexed, the leg is ADDucted at the hip and INTERNALLY rotated. The entire right leg is also shortened. The hip must be reduced quickly as the dislocation can compromise femoral head blood supply leading to avascular necrosis. A useful mnemonic to remember rotation with hip dislocations in PIN AXE (posterior - internal, anterior external). Anterior dislocations rotate externally. 

Posterior hip dislocation

Posterior hip dislocations account for approximately 90% of dislocations at this joint. The classic mechanism is a flexed knee striking the dashboard during a motor vehicle collision. Note that the right knee is flexed, the leg is ADDucted at the hip and INTERNALLY rotated. The entire right leg is also shortened. The hip must be reduced quickly as the dislocation can compromise femoral head blood supply leading to avascular necrosis. A useful mnemonic to remember rotation with hip dislocations in PIN AXE (posterior - internal, anterior external). Anterior dislocations rotate externally. 

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