Fraktur Os trapezoideum

nicht verwechseln mit: Fraktur Os trapezium

Trapezoid fractures are an uncommon carpal fracture. They typically occur as the result of axial force through the second metacarpal.

Epidemiology

They account for ~0.4% of all carpal fractures .

Radiographic features

The trapezoid is in a relatively immobile, and protected location hence the rarity of an isolated fracture. Given the wedged shape and weaker dorsal ligamentous support, fractures will dislocate in the dorsal direction . It is often associated with a second metacarpal fracture.

Treatment and prognosis

Treatment varies from conservative management to open reduction internal fixation, failure to recognize can lead to functional problems such as decreased grasp power .

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