Distal Radius

Biomechanical Comparison of Locking versus Nonlocking Volar and Dorsal T-Plates for Fixation of Dorsally Comminuted Distal Radius Fractures

Gondusky JS, Carney J, Erpenbach J, et al (Balboa Naval Med Ctr–San Diego, CA; et al) J Orthop Trauma 25:44-50, 2011^§

Abstract

Objectives

The purpose of this study was to gain insight into the effect of plate location and screw type for fixation of extra-articular distal radius fractures with dorsal comminution (Orthopaedic Trauma Association Type 23-A3.2).

Methods

Sixteen pairs of cadaver radii were randomized to four plating configurations: dorsal locking, dorsal nonlocking, volar locking, and volar nonlocking. A standard 1-cm dorsal wedge osteotomy was used. Cyclic axial loads were applied for 5000 cycles. Stiffness and fragment displacement were recorded at 500 cycle-intervals. Pre- and postcyclic loading radiographs were analyzed. An axial load to failure test followed and construct stiffness and failure strength recorded. Biomechanical data were analyzed using a two-way analysis of variance (P < 0.05). Failure modes were descriptively interpreted.

Results

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