Traumatic bilateral locked facet joints at L4-5 level are a rare entity. A careful review only revealed four case reports. This case presented with an unusual mechanism of injury.
We present a case of a 40-year-old male who suffered bilateral L4-5 traumatic facet fracture dislocation following a fall injury. The dislocation was associated with fractures of bilateral L4 inferior articular processes, left L4 pedicle, L4 spinous process and postero-inferior body of L4. He presented with cauda-equina syndrome and underwent emergency decompression, reduction and instrumented fusion.
The biomechanics of the lumbar spine may differ with each individual. L4-5 dislocation may be a variant to lumbosacral (L5-S1) dislocation, owing to hyperextension injury.