The Denis Classification System classified<unk> s into three regions according to the part of the bone affected. The location of the fracture has a major influence on symptoms experienced. * Zone 1 (ala), may cause disruption to the nerve root of the fifth lumbar vertebra (L5) * Zone 2<unk>  foramina), may cause sciatica * Zone 3<unk>  canal), may cause cauda equina syndrome
Sacral fracture
Acetabular fracture
Coccyx fracture
Humerus fracture
Back strain
Elbow fracture
Scaphoid fracture
Hume fracture