Penetration of the dorsal screw when treating
distal radius fractures with volar locking plates is an avoidable complication
that causes lesions of the extensor tendon in between 2% and 6%
of patients. We examined axial fluoroscopic views of the distal
end of the radius to observe small amounts of dorsal screw penetration,
and determined the ideal angle of inclination of the x-ray beam
to the forearm when making this radiological view. Six volar locking plates were inserted at the wrists of cadavers.
The actual screw length was measured under direct vision through
a dorsal approach to the distal radius. Axial radiographs were performed
for different angles of inclination of the forearm at the elbow. Comparing axial radiological measurements and real screw length,
a statistically significant correlation could be demonstrated at
an angle of inclination between 5° and 20°. The ideal angle of inclination
required to minimise the risk of implanting over-long screws in
a dorsal horizon radiological view is 15°. Cite this article:
