k wires

Epidemiology

Young men in 20's and 30's

Aetiology

High energy injuries

- fall from heights

- MVA

Mayfield Classification

Injury progresses from radial to ulna

- usually disruption proximal row either side of lunate

1.  Capitate usually displaces dorsally initially

- volar lunate dislocation is end stage

Epidemiology

2 groups

1.  Elderly

- low velocity injury

- osteoporotic

- need to start bisphosphonates

2.  Young patients

- high velocity injury

Anatomy

Distal Radius Angles

- radial volar tilt 11°

- radial inclination  22°

- radius is 11 mm longer than ulna 

- ulna variance 2mm positive on average