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Is sparing the pronator quadratus muscle possible in volar plating of the distal radius?

We measured the length of the distal radius that can be exposed by mobilizing the distal edge of pronator quadratus (PQ) without detaching its radial attachment. Measurements were made in 20 cadaveric upper limbs from the distal margin of the radius in line with the scaphoid and lunate fossae to the distal margin of the PQ, before and after mobilization of the muscle from its distal attachment. The mean distance from the distal edge of the PQ to the scaphoid fossa was 13.1 mm and to the lunate fossa was 10.7 mm. This increased to a mean of 26.2 mm for the scaphoid and a mean of 23.8 mm for the lunate fossa following mobilization of PQ. Subperiosteal retrograde release of the PQ from its distal margin will allow for the placement of a volar plate and insertion of locking peri-articular screws in the great majority of volar locking plate systems on the market.